Summary

af1804a3cb2de6aa_backup.exe

File af1804a3cb2de6aa_backup.exe

Summary
Download Resubmit sample

Size 88.3KB
Type PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed
MD5 8494ed74a5c720693be43ba69e07e3e6
SHA1 e8bb0aee253e9c72e04740af1e98fbe432afa1ec
SHA256 af1804a3cb2de6aa0cd380bc0ae6a94b4a7bf2f4d671f8bb58b78b6363ce5e5d
SHA512
ec9612b76993d1b7b3cb969a15de6fa213d2fbee31c90141e19ef32c3b913b6a6669c75dd4bafab3071881636bc455ea9cbf06de2ea60178e2d0b0affc2e38ef
CRC32 8683808A
ssdeep None
Yara
  • UPX - (no description)
  • suspicious_packer_section - The packer/protector section names/keywords

Score

This file is very suspicious, with a score of 10 out of 10!

Please notice: The scoring system is currently still in development and should be considered an alpha feature.

Autosubmit

Parent_Task_ID:7085512

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Information on Execution

Analysis
Category Started Completed Duration Routing Logs
FILE Nov. 23, 2025, 2:36 a.m. Nov. 23, 2025, 2:43 a.m. 407 seconds internet Show Analyzer Log
Show Cuckoo Log

Analyzer Log

2025-11-15 14:33:38,015 [analyzer] DEBUG: Starting analyzer from: C:\tmpsftntc
2025-11-15 14:33:38,030 [analyzer] DEBUG: Pipe server name: \??\PIPE\SvnfALARvtJVLJovlYeGI
2025-11-15 14:33:38,030 [analyzer] DEBUG: Log pipe server name: \??\PIPE\dTTPUFNvwTOBuLZZ
2025-11-15 14:33:38,046 [analyzer] DEBUG: No analysis package specified, trying to detect it automagically.
2025-11-15 14:33:38,046 [analyzer] INFO: Automatically selected analysis package "exe"
2025-11-15 14:33:38,562 [analyzer] DEBUG: Started auxiliary module Curtain
2025-11-15 14:33:38,562 [analyzer] DEBUG: Started auxiliary module DbgView
2025-11-15 14:33:39,155 [analyzer] DEBUG: Started auxiliary module Disguise
2025-11-15 14:33:39,375 [analyzer] DEBUG: Loaded monitor into process with pid 508
2025-11-15 14:33:39,375 [analyzer] DEBUG: Started auxiliary module DumpTLSMasterSecrets
2025-11-15 14:33:39,375 [analyzer] DEBUG: Started auxiliary module Human
2025-11-15 14:33:39,375 [analyzer] DEBUG: Started auxiliary module InstallCertificate
2025-11-15 14:33:39,375 [analyzer] DEBUG: Started auxiliary module Reboot
2025-11-15 14:33:39,467 [analyzer] DEBUG: Started auxiliary module RecentFiles
2025-11-15 14:33:39,467 [analyzer] DEBUG: Started auxiliary module Screenshots
2025-11-15 14:33:39,483 [analyzer] DEBUG: Started auxiliary module Sysmon
2025-11-15 14:33:39,483 [analyzer] DEBUG: Started auxiliary module LoadZer0m0n
2025-11-15 14:33:39,608 [lib.api.process] INFO: Successfully executed process from path u'C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\af1804a3cb2de6aa_backup.exe' with arguments '' and pid 1524
2025-11-15 14:33:39,842 [analyzer] DEBUG: Loaded monitor into process with pid 1524
2025-11-15 14:33:39,905 [analyzer] INFO: Added new file to list with pid 1524 and path C:\Users\Administrator\AppData\Local\Temp\backup.exe
2025-11-15 14:33:39,921 [analyzer] INFO: Added new file to list with pid 1524 and path C:\Users\Administrator\AppData\Local\Temp\0C7910BA-F902-421E-9E69-CF9AEE0DD4D7\backup.exe
2025-11-15 14:33:39,983 [analyzer] INFO: Injected into process with pid 264 and name ''
2025-11-15 14:33:40,140 [analyzer] DEBUG: Loaded monitor into process with pid 264
2025-11-15 14:33:40,217 [analyzer] INFO: Added new file to list with pid 1524 and path C:\Users\Administrator\AppData\Local\Temp\9C7EA51D-B2B9-4ABB-A82F-1B32707A146E\backup.exe
2025-11-15 14:33:40,296 [analyzer] INFO: Added new file to list with pid 1524 and path C:\Users\Administrator\AppData\Local\Temp\hsperfdata_Administrator\backup.exe
2025-11-15 14:33:41,203 [analyzer] INFO: Added new file to list with pid 264 and path C:\backup.exe
2025-11-15 14:36:58,625 [analyzer] INFO: Analysis timeout hit, terminating analysis.
2025-11-15 14:36:59,842 [analyzer] INFO: Terminating remaining processes before shutdown.
2025-11-15 14:36:59,842 [lib.api.process] INFO: Successfully terminated process with pid 1524.
2025-11-15 14:36:59,858 [lib.api.process] INFO: Successfully terminated process with pid 264.
2025-11-15 14:36:59,875 [analyzer] INFO: Analysis completed.

Cuckoo Log

2025-11-23 02:36:48,743 [cuckoo.core.scheduler] DEBUG: Task #7181803: no machine available yet
2025-11-23 02:36:49,812 [cuckoo.core.scheduler] DEBUG: Task #7181803: no machine available yet
2025-11-23 02:36:50,846 [cuckoo.core.scheduler] DEBUG: Task #7181803: no machine available yet
2025-11-23 02:36:51,884 [cuckoo.core.scheduler] DEBUG: Task #7181803: no machine available yet
2025-11-23 02:36:52,919 [cuckoo.core.scheduler] INFO: Task #7181803: acquired machine win7x6421 (label=win7x6421)
2025-11-23 02:36:52,925 [cuckoo.core.resultserver] DEBUG: Now tracking machine 192.168.168.221 for task #7181803
2025-11-23 02:36:53,095 [cuckoo.auxiliary.sniffer] INFO: Started sniffer with PID 3010938 (interface=vboxnet0, host=192.168.168.221)
2025-11-23 02:36:53,198 [cuckoo.machinery.virtualbox] DEBUG: Starting vm win7x6421
2025-11-23 02:36:54,072 [cuckoo.machinery.virtualbox] DEBUG: Restoring virtual machine win7x6421 to vmcloak
2025-11-23 02:38:36,326 [cuckoo.core.guest] INFO: Starting analysis #7181803 on guest (id=win7x6421, ip=192.168.168.221)
2025-11-23 02:38:37,331 [cuckoo.core.guest] DEBUG: win7x6421: not ready yet
2025-11-23 02:38:42,350 [cuckoo.core.guest] INFO: Guest is running Cuckoo Agent 0.10 (id=win7x6421, ip=192.168.168.221)
2025-11-23 02:38:42,421 [cuckoo.core.guest] DEBUG: Uploading analyzer to guest (id=win7x6421, ip=192.168.168.221, monitor=latest, size=6660546)
2025-11-23 02:38:43,712 [cuckoo.core.resultserver] DEBUG: Task #7181803: live log analysis.log initialized.
2025-11-23 02:38:44,985 [cuckoo.core.resultserver] DEBUG: Task #7181803 is sending a BSON stream
2025-11-23 02:38:45,441 [cuckoo.core.resultserver] DEBUG: Task #7181803 is sending a BSON stream
2025-11-23 02:38:45,734 [cuckoo.core.resultserver] DEBUG: Task #7181803 is sending a BSON stream
2025-11-23 02:38:46,259 [cuckoo.core.resultserver] DEBUG: Task #7181803: File upload for 'shots/0001.jpg'
2025-11-23 02:38:46,269 [cuckoo.core.resultserver] DEBUG: Task #7181803 uploaded file length: 133502
2025-11-23 02:38:58,460 [cuckoo.core.guest] DEBUG: win7x6421: analysis #7181803 still processing
2025-11-23 02:39:13,626 [cuckoo.core.guest] DEBUG: win7x6421: analysis #7181803 still processing
2025-11-23 02:39:28,724 [cuckoo.core.guest] DEBUG: win7x6421: analysis #7181803 still processing
2025-11-23 02:39:43,837 [cuckoo.core.guest] DEBUG: win7x6421: analysis #7181803 still processing
2025-11-23 02:39:59,034 [cuckoo.core.guest] DEBUG: win7x6421: analysis #7181803 still processing
2025-11-23 02:40:14,209 [cuckoo.core.guest] DEBUG: win7x6421: analysis #7181803 still processing
2025-11-23 02:40:29,318 [cuckoo.core.guest] DEBUG: win7x6421: analysis #7181803 still processing
2025-11-23 02:40:44,420 [cuckoo.core.guest] DEBUG: win7x6421: analysis #7181803 still processing
2025-11-23 02:40:59,668 [cuckoo.core.guest] DEBUG: win7x6421: analysis #7181803 still processing
2025-11-23 02:41:14,742 [cuckoo.core.guest] DEBUG: win7x6421: analysis #7181803 still processing
2025-11-23 02:41:30,006 [cuckoo.core.guest] DEBUG: win7x6421: analysis #7181803 still processing
2025-11-23 02:41:45,165 [cuckoo.core.guest] DEBUG: win7x6421: analysis #7181803 still processing
2025-11-23 02:42:00,382 [cuckoo.core.guest] DEBUG: win7x6421: analysis #7181803 still processing
2025-11-23 02:42:04,483 [cuckoo.core.resultserver] DEBUG: Task #7181803: File upload for 'curtain/1763213818.8.curtain.log'
2025-11-23 02:42:04,486 [cuckoo.core.resultserver] DEBUG: Task #7181803 uploaded file length: 36
2025-11-23 02:42:05,458 [cuckoo.core.resultserver] DEBUG: Task #7181803: File upload for 'sysmon/1763213819.78.sysmon.xml'
2025-11-23 02:42:05,527 [cuckoo.core.resultserver] DEBUG: Task #7181803 uploaded file length: 14332656
2025-11-23 02:42:05,573 [cuckoo.core.resultserver] DEBUG: Task #7181803 had connection reset for <Context for LOG>
2025-11-23 02:42:05,574 [cuckoo.core.resultserver] DEBUG: Task #7181803: File upload for 'files/3ec907a3dec1810c_backup.exe'
2025-11-23 02:42:05,577 [cuckoo.core.resultserver] DEBUG: Task #7181803: File upload for 'files/fae855d41bad1b9a_backup.exe'
2025-11-23 02:42:05,579 [cuckoo.core.resultserver] DEBUG: Task #7181803: File upload for 'files/23d0b3eda69491e8_backup.exe'
2025-11-23 02:42:05,580 [cuckoo.core.resultserver] DEBUG: Task #7181803 uploaded file length: 90450
2025-11-23 02:42:05,582 [cuckoo.core.resultserver] DEBUG: Task #7181803 uploaded file length: 90448
2025-11-23 02:42:05,583 [cuckoo.core.resultserver] DEBUG: Task #7181803 uploaded file length: 90448
2025-11-23 02:42:06,404 [cuckoo.core.guest] INFO: win7x6421: analysis completed successfully
2025-11-23 02:42:06,416 [cuckoo.core.plugins] DEBUG: Stopped auxiliary module: Redsocks
2025-11-23 02:42:06,449 [cuckoo.core.plugins] DEBUG: Stopped auxiliary module: Sniffer
2025-11-23 02:42:07,428 [cuckoo.machinery.virtualbox] INFO: Successfully generated memory dump for virtual machine with label win7x6421 to path /srv/cuckoo/cwd/storage/analyses/7181803/memory.dmp
2025-11-23 02:42:07,429 [cuckoo.machinery.virtualbox] DEBUG: Stopping vm win7x6421
2025-11-23 02:43:29,175 [cuckoo.core.resultserver] DEBUG: Stopped tracking machine 192.168.168.221 for task #7181803
2025-11-23 02:43:29,637 [cuckoo.core.scheduler] DEBUG: Released database task #7181803
2025-11-23 02:43:36,273 [cuckoo.core.scheduler] INFO: Task #7181803: analysis procedure completed

Signatures

Yara rules detected for file (2 events)
description (no description) rule UPX
description The packer/protector section names/keywords rule suspicious_packer_section
Creates executable files on the filesystem (5 events)
file C:\Users\Administrator\AppData\Local\Temp\0C7910BA-F902-421E-9E69-CF9AEE0DD4D7\backup.exe
file C:\backup.exe
file C:\Users\Administrator\AppData\Local\Temp\backup.exe
file C:\Users\Administrator\AppData\Local\Temp\9C7EA51D-B2B9-4ABB-A82F-1B32707A146E\backup.exe
file C:\Users\Administrator\AppData\Local\Temp\hsperfdata_Administrator\backup.exe
Drops an executable to the user AppData folder (1 event)
file C:\Users\Administrator\AppData\Local\Temp\0C7910BA-F902-421E-9E69-CF9AEE0DD4D7\backup.exe
Changes read-write memory protection to read-execute (probably to avoid detection when setting all RWX flags at the same time) (1 event)
Time & API Arguments Status Return Repeated

NtProtectVirtualMemory

 process_identifier: 1524
stack_dep_bypass: 0
stack_pivoted: 0
heap_dep_bypass: 1
length: 24576
protection: 32 (PAGE_EXECUTE_READ)
base_address: 0x00500000
process_handle: 0xffffffff
1 0 0
The binary likely contains encrypted or compressed data indicative of a packer (2 events)
section {u'size_of_data': u'0x00003e00', u'virtual_address': u'0x00011000', u'entropy': 7.804677160000422, u'name': u'UPX1', u'virtual_size': u'0x00004000'} entropy 7.80467716 description A section with a high entropy has been found
entropy 0.392405063291 description Overall entropy of this PE file is high
The executable is compressed using UPX (2 events)
section UPX0 description Section name indicates UPX
section UPX1 description Section name indicates UPX
Attempts to modify Explorer settings to prevent file extensions from being displayed (1 event)
registry HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt
Attempts to modify Explorer settings to prevent hidden files from being displayed (1 event)
registry HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Hidden
File has been identified by 14 AntiVirus engine on IRMA as malicious (14 events)
G Data Antivirus (Windows) Virus: Trojan.Generic.4385790 (Engine A), Win32.Trojan.Vilsel.B (Engine B)
Avast Core Security (Linux) Win32:Evo-gen [Trj]
C4S ClamAV (Linux) Win.Malware.Genpack-6989317-0
Trend Micro SProtect (Linux) WORM_VILSEL.SMB
Trellix (Linux) Generic VB.z trojan
WithSecure (Linux) Trojan.TR/Crypt.ULPM.Gen
eScan Antivirus (Linux) Trojan.Generic.4385790(DB)
ESET Security (Windows) Win32/VB.OZA trojan
Sophos Anti-Virus (Linux) Troj/VB-LET
DrWeb Antivirus (Linux) Trojan.Copyself.102
ClamAV (Linux) Win.Malware.Genpack-6989317-0
Bitdefender Antivirus (Linux) Trojan.Generic.4385790
Kaspersky Standard (Windows) Trojan.Win32.Vilsel.loy
Emsisoft Commandline Scanner (Windows) Trojan.Generic.4385790 (B)
Screenshots
Name Response Post-Analysis Lookup
No hosts contacted.
IP Address Status Action VT Location
No hosts contacted.
Cuckoo

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