Summary

efbc61114e0a0e32_backup.exe

File efbc61114e0a0e32_backup.exe

Summary
Download Resubmit sample

Size 88.3KB
Type PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed
MD5 99f2044ff4af1ec3b161958038499d4e
SHA1 ac413fa0c034c5e74d7f97c2e35568161b508065
SHA256 efbc61114e0a0e32ddc4fb494751a88de647064d202beca0400b04fd0e93d170
SHA512
7b683749ce677df8c6603b20fb096774f7331f641a339773df32c12600e325ae0df0aec28eb53341ad8504cba3afb2bfa0c6fc67125378b4d4c530f3b4efdc41
CRC32 C1F3F424
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:6907259

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Information on Execution

Analysis
Category Started Completed Duration Routing Logs
FILE Aug. 26, 2025, 10:26 p.m. Aug. 26, 2025, 10:35 p.m. 543 seconds internet Show Analyzer Log
Show Cuckoo Log

Analyzer Log

2025-08-26 13:22:39,000 [analyzer] DEBUG: Starting analyzer from: C:\tmp1xmcit
2025-08-26 13:22:39,000 [analyzer] DEBUG: Pipe server name: \??\PIPE\mvIVQuKZjZLQcunhxSVMxQKrhB
2025-08-26 13:22:39,000 [analyzer] DEBUG: Log pipe server name: \??\PIPE\cPGkfLHaHnOBvgdpbxMKxHpMUi
2025-08-26 13:22:39,000 [analyzer] DEBUG: No analysis package specified, trying to detect it automagically.
2025-08-26 13:22:39,000 [analyzer] INFO: Automatically selected analysis package "exe"
2025-08-26 13:22:39,265 [analyzer] DEBUG: Started auxiliary module Curtain
2025-08-26 13:22:39,265 [analyzer] DEBUG: Started auxiliary module DbgView
2025-08-26 13:22:39,796 [analyzer] DEBUG: Started auxiliary module Disguise
2025-08-26 13:22:40,000 [analyzer] DEBUG: Loaded monitor into process with pid 508
2025-08-26 13:22:40,000 [analyzer] DEBUG: Started auxiliary module DumpTLSMasterSecrets
2025-08-26 13:22:40,000 [analyzer] DEBUG: Started auxiliary module Human
2025-08-26 13:22:40,000 [analyzer] DEBUG: Started auxiliary module InstallCertificate
2025-08-26 13:22:40,000 [analyzer] DEBUG: Started auxiliary module Reboot
2025-08-26 13:22:40,125 [analyzer] DEBUG: Started auxiliary module RecentFiles
2025-08-26 13:22:40,140 [analyzer] DEBUG: Started auxiliary module Screenshots
2025-08-26 13:22:40,140 [analyzer] DEBUG: Started auxiliary module Sysmon
2025-08-26 13:22:40,140 [analyzer] DEBUG: Started auxiliary module LoadZer0m0n
2025-08-26 13:22:40,280 [lib.api.process] INFO: Successfully executed process from path u'C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\efbc61114e0a0e32_backup.exe' with arguments '' and pid 1904
2025-08-26 13:22:40,467 [analyzer] DEBUG: Loaded monitor into process with pid 1904
2025-08-26 13:22:40,530 [analyzer] INFO: Added new file to list with pid 1904 and path C:\Users\Administrator\AppData\Local\Temp\backup.exe
2025-08-26 13:22:40,546 [analyzer] INFO: Added new file to list with pid 1904 and path C:\Users\Administrator\AppData\Local\Temp\0C7910BA-F902-421E-9E69-CF9AEE0DD4D7\backup.exe
2025-08-26 13:22:40,625 [analyzer] INFO: Injected into process with pid 2220 and name ''
2025-08-26 13:22:40,780 [analyzer] DEBUG: Loaded monitor into process with pid 2220
2025-08-26 13:22:40,858 [analyzer] INFO: Added new file to list with pid 1904 and path C:\Users\Administrator\AppData\Local\Temp\9C7EA51D-B2B9-4ABB-A82F-1B32707A146E\update.exe
2025-08-26 13:22:41,046 [analyzer] INFO: Added new file to list with pid 1904 and path C:\Users\Administrator\AppData\Local\Temp\hsperfdata_Administrator\backup.exe
2025-08-26 13:22:41,828 [analyzer] INFO: Added new file to list with pid 2220 and path C:\backup.exe
2025-08-26 21:32:54,194 [analyzer] INFO: Analysis timeout hit, terminating analysis.
2025-08-26 21:32:55,960 [analyzer] INFO: Terminating remaining processes before shutdown.
2025-08-26 21:32:55,960 [lib.api.process] INFO: Successfully terminated process with pid 1904.
2025-08-26 21:32:55,960 [lib.api.process] INFO: Successfully terminated process with pid 2220.
2025-08-26 21:32:55,976 [analyzer] INFO: Analysis completed.

Cuckoo Log

2025-08-26 22:26:35,800 [cuckoo.core.scheduler] DEBUG: Task #6909745: no machine available yet
2025-08-26 22:26:37,277 [cuckoo.core.scheduler] INFO: Task #6909745: acquired machine win7x6414 (label=win7x6414)
2025-08-26 22:26:37,288 [cuckoo.core.resultserver] DEBUG: Now tracking machine 192.168.168.214 for task #6909745
2025-08-26 22:26:37,748 [cuckoo.auxiliary.sniffer] INFO: Started sniffer with PID 2912473 (interface=vboxnet0, host=192.168.168.214)
2025-08-26 22:26:37,904 [cuckoo.machinery.virtualbox] DEBUG: Starting vm win7x6414
2025-08-26 22:26:38,583 [cuckoo.machinery.virtualbox] DEBUG: Restoring virtual machine win7x6414 to vmcloak
2025-08-26 22:29:26,413 [cuckoo.core.guest] INFO: Starting analysis #6909745 on guest (id=win7x6414, ip=192.168.168.214)
2025-08-26 22:29:27,417 [cuckoo.core.guest] DEBUG: win7x6414: not ready yet
2025-08-26 22:29:32,457 [cuckoo.core.guest] INFO: Guest is running Cuckoo Agent 0.10 (id=win7x6414, ip=192.168.168.214)
2025-08-26 22:29:32,560 [cuckoo.core.guest] DEBUG: Uploading analyzer to guest (id=win7x6414, ip=192.168.168.214, monitor=latest, size=6660546)
2025-08-26 22:29:33,882 [cuckoo.core.resultserver] DEBUG: Task #6909745: live log analysis.log initialized.
2025-08-26 22:29:34,836 [cuckoo.core.resultserver] DEBUG: Task #6909745 is sending a BSON stream
2025-08-26 22:29:35,448 [cuckoo.core.resultserver] DEBUG: Task #6909745 is sending a BSON stream
2025-08-26 22:29:35,609 [cuckoo.core.resultserver] DEBUG: Task #6909745 is sending a BSON stream
2025-08-26 22:29:36,265 [cuckoo.core.resultserver] DEBUG: Task #6909745: File upload for 'shots/0001.jpg'
2025-08-26 22:29:36,294 [cuckoo.core.resultserver] DEBUG: Task #6909745 uploaded file length: 133479
2025-08-26 22:29:48,755 [cuckoo.core.guest] DEBUG: win7x6414: analysis #6909745 still processing
2025-08-26 22:30:04,031 [cuckoo.core.guest] DEBUG: win7x6414: analysis #6909745 still processing
2025-08-26 22:30:19,137 [cuckoo.core.guest] DEBUG: win7x6414: analysis #6909745 still processing
2025-08-26 22:30:34,432 [cuckoo.core.guest] DEBUG: win7x6414: analysis #6909745 still processing
2025-08-26 22:30:49,523 [cuckoo.core.guest] DEBUG: win7x6414: analysis #6909745 still processing
2025-08-26 22:31:04,894 [cuckoo.core.guest] DEBUG: win7x6414: analysis #6909745 still processing
2025-08-26 22:31:20,026 [cuckoo.core.guest] DEBUG: win7x6414: analysis #6909745 still processing
2025-08-26 22:31:35,345 [cuckoo.core.guest] DEBUG: win7x6414: analysis #6909745 still processing
2025-08-26 22:31:50,649 [cuckoo.core.guest] DEBUG: win7x6414: analysis #6909745 still processing
2025-08-26 22:32:05,826 [cuckoo.core.guest] DEBUG: win7x6414: analysis #6909745 still processing
2025-08-26 22:32:20,986 [cuckoo.core.guest] DEBUG: win7x6414: analysis #6909745 still processing
2025-08-26 22:32:36,167 [cuckoo.core.guest] DEBUG: win7x6414: analysis #6909745 still processing
2025-08-26 22:32:51,361 [cuckoo.core.guest] DEBUG: win7x6414: analysis #6909745 still processing
2025-08-26 22:32:54,389 [cuckoo.core.resultserver] DEBUG: Task #6909745: File upload for 'curtain/1756236774.38.curtain.log'
2025-08-26 22:32:54,392 [cuckoo.core.resultserver] DEBUG: Task #6909745 uploaded file length: 36
2025-08-26 22:32:55,827 [cuckoo.core.resultserver] DEBUG: Task #6909745: File upload for 'sysmon/1756236775.82.sysmon.xml'
2025-08-26 22:32:55,957 [cuckoo.core.resultserver] DEBUG: Task #6909745 uploaded file length: 20726724
2025-08-26 22:32:55,993 [cuckoo.core.resultserver] DEBUG: Task #6909745: File upload for 'files/8ea7c48eb58dbfb6_backup.exe'
2025-08-26 22:32:55,997 [cuckoo.core.resultserver] DEBUG: Task #6909745: File upload for 'files/017c95768cd97438_backup.exe'
2025-08-26 22:32:55,999 [cuckoo.core.resultserver] DEBUG: Task #6909745: File upload for 'files/728550c8d5b54f7e_backup.exe'
2025-08-26 22:32:56,001 [cuckoo.core.resultserver] DEBUG: Task #6909745 uploaded file length: 90416
2025-08-26 22:32:56,002 [cuckoo.core.resultserver] DEBUG: Task #6909745 uploaded file length: 90414
2025-08-26 22:32:56,004 [cuckoo.core.resultserver] DEBUG: Task #6909745 uploaded file length: 90414
2025-08-26 22:32:56,008 [cuckoo.core.resultserver] DEBUG: Task #6909745 had connection reset for <Context for LOG>
2025-08-26 22:32:57,399 [cuckoo.core.guest] INFO: win7x6414: analysis completed successfully
2025-08-26 22:32:57,410 [cuckoo.core.plugins] DEBUG: Stopped auxiliary module: Redsocks
2025-08-26 22:32:57,433 [cuckoo.core.plugins] DEBUG: Stopped auxiliary module: Sniffer
2025-08-26 22:32:58,553 [cuckoo.machinery.virtualbox] INFO: Successfully generated memory dump for virtual machine with label win7x6414 to path /srv/cuckoo/cwd/storage/analyses/6909745/memory.dmp
2025-08-26 22:32:58,555 [cuckoo.machinery.virtualbox] DEBUG: Stopping vm win7x6414
2025-08-26 22:35:38,933 [cuckoo.core.resultserver] DEBUG: Stopped tracking machine 192.168.168.214 for task #6909745
2025-08-26 22:35:39,273 [cuckoo.core.scheduler] DEBUG: Released database task #6909745
2025-08-26 22:35:39,296 [cuckoo.core.scheduler] INFO: Task #6909745: 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:\Users\Administrator\AppData\Local\Temp\9C7EA51D-B2B9-4ABB-A82F-1B32707A146E\update.exe
file C:\backup.exe
file C:\Users\Administrator\AppData\Local\Temp\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: 1904
stack_dep_bypass: 0
stack_pivoted: 0
heap_dep_bypass: 1
length: 24576
protection: 32 (PAGE_EXECUTE_READ)
base_address: 0x003b0000
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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