Analysis
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max time kernel
149s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
24-05-2024 19:57
Static task
static1
Behavioral task
behavioral1
Sample
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
Resource
win10v2004-20240426-en
General
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Target
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
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Size
716KB
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MD5
2a02c81a9994f011090e174bb076ec9b
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SHA1
50cf1a96d5e2945143b6fb3484b124d41349c77c
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SHA256
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18
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SHA512
d6d44ee8d3cb1a39228e24f669e86ee871f0bef7b3348924b63e4b067b0ccf0f9f00333fa55d7f46b18dcd13fb4144e83e2611d118557639aa837861eb51342a
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SSDEEP
12288:0k0wJoEANTCwX67nsbdxnZF2+9R32y1Cbd8n34rtzjg1S0lWEKm:0kVCGwX6LsbS+9Uy1CxCwtQkeKm
Malware Config
Extracted
djvu
http://cajgtus.com/test1/get.php
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extension
.vepi
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offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://cajgtus.com/files/1/build3.exe
-
ransomnote
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Signatures
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Detected Djvu ransomware 15 IoCs
Processes:
resource yara_rule behavioral2/memory/4744-2-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4744-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4744-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3640-4-0x00000000049C0000-0x0000000004ADB000-memory.dmp family_djvu behavioral2/memory/4744-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4744-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2984-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2984-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2984-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2984-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2984-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2984-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2984-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2984-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2984-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\fb0df9a1-c349-4e54-8e40-5529a6f57e6b\\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe\" --AutoStart" c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe -
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 3 api.2ip.ua 4 api.2ip.ua 15 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exec4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exedescription pid process target process PID 3640 set thread context of 4744 3640 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1860 set thread context of 2984 1860 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exec4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exepid process 4744 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe 4744 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe 2984 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe 2984 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exec4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exec4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exedescription pid process target process PID 3640 wrote to memory of 4744 3640 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 3640 wrote to memory of 4744 3640 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 3640 wrote to memory of 4744 3640 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 3640 wrote to memory of 4744 3640 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 3640 wrote to memory of 4744 3640 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 3640 wrote to memory of 4744 3640 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 3640 wrote to memory of 4744 3640 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 3640 wrote to memory of 4744 3640 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 3640 wrote to memory of 4744 3640 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 3640 wrote to memory of 4744 3640 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 4744 wrote to memory of 3112 4744 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe icacls.exe PID 4744 wrote to memory of 3112 4744 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe icacls.exe PID 4744 wrote to memory of 3112 4744 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe icacls.exe PID 4744 wrote to memory of 1860 4744 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 4744 wrote to memory of 1860 4744 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 4744 wrote to memory of 1860 4744 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1860 wrote to memory of 2984 1860 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1860 wrote to memory of 2984 1860 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1860 wrote to memory of 2984 1860 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1860 wrote to memory of 2984 1860 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1860 wrote to memory of 2984 1860 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1860 wrote to memory of 2984 1860 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1860 wrote to memory of 2984 1860 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1860 wrote to memory of 2984 1860 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1860 wrote to memory of 2984 1860 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1860 wrote to memory of 2984 1860 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\fb0df9a1-c349-4e54-8e40-5529a6f57e6b" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EAFilesize
1KB
MD57bb5a14437331aad24915a3d8546fbc1
SHA19a5570c07af0c0cde02858f61e1c7094f5a70f38
SHA25642397d9f3c8164d4cef19fc169d7bcea77a3ea7e9bcb8cfa7db2ff0bbd3a7e00
SHA512a2333a078be981eafe3f666ff3944cd3b28279a9da99f354014d81d80e98a0effabff2a8f5ab5fba61f7de9e49e2af3112dda6b28678192a1d80d2ca22004f13
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EAFilesize
410B
MD500f7077ed8eb805c49e071b02375d57c
SHA1852de83cebb4d018349a654ce024840f106d9290
SHA25653e17f465dc264a96eb463e62a7a2aa0cfe012eefc2db713ae0c83cf4303d912
SHA512ea33c8a46141f765c8ef6efe14104e79e8ed74a47700aa7891e1cb1d923e79cffd070b49e522c03360117ff2d73826b4bec8a737bdd48d285a7c15aeb1285165
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
392B
MD5f4704a7a244d25a43fd98dc8d42bac59
SHA185e0a36f70bcd2ac3ff57b8665a40f8678de5db6
SHA25693b178cded5cf230ffd3e2de1308d4c1aa2cc79e1b3f17cf6831696266886525
SHA51215231d0d0c48699fd820db4ae9015314be728d89a911a6f5369a3a506167aed3b4ab1314fca2954444cc6ced973ce830a16a1ab82ccf1b7e34c3c7e90c3fe72a
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C:\Users\Admin\AppData\Local\fb0df9a1-c349-4e54-8e40-5529a6f57e6b\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exeFilesize
716KB
MD52a02c81a9994f011090e174bb076ec9b
SHA150cf1a96d5e2945143b6fb3484b124d41349c77c
SHA256c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18
SHA512d6d44ee8d3cb1a39228e24f669e86ee871f0bef7b3348924b63e4b067b0ccf0f9f00333fa55d7f46b18dcd13fb4144e83e2611d118557639aa837861eb51342a
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memory/2984-29-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2984-28-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2984-37-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2984-22-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2984-36-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2984-35-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2984-34-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2984-32-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2984-27-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3640-1-0x0000000004920000-0x00000000049BC000-memory.dmpFilesize
624KB
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memory/3640-4-0x00000000049C0000-0x0000000004ADB000-memory.dmpFilesize
1.1MB
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memory/4744-6-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4744-2-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4744-3-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4744-5-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4744-19-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB