Analysis
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max time kernel
149s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
22-05-2024 16:34
Static task
static1
Behavioral task
behavioral1
Sample
3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
Resource
win11-20240426-en
General
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Target
3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
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Size
710KB
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MD5
c3cdc4206b45b5a62d65c9830bd4b069
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SHA1
d529698f023e3a58c255286fc03fcde61478ea7a
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SHA256
3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4
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SHA512
528e0dcb5d7a8b71a9d03631adb39a75aad8e4c1799bc33b001f7111467adb164ed9f670948aa4b5f37627ffa1cd86d7430d612d86489de4410358a196f73dc3
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SSDEEP
12288:mTTwrfwqgsyZgZpXpiAsezNSgMPz++5mj1GrroU41D1LSrq:mTU3yOZpZqHvPi+5mjeoU49S
Malware Config
Extracted
djvu
http://cajgtus.com/test2/get.php
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extension
.vehu
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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
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ransomnote
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Signatures
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Detected Djvu ransomware 15 IoCs
Processes:
resource yara_rule behavioral1/memory/4684-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4684-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4684-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4684-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2700-2-0x0000000004A00000-0x0000000004B1B000-memory.dmp family_djvu behavioral1/memory/4684-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/536-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/536-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/536-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/536-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/536-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/536-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/536-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/536-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/536-37-0x0000000000400000-0x0000000000537000-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:
3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4cd38d46-e08f-416e-8fd8-450ccba4790d\\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe\" --AutoStart" 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.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 4 api.2ip.ua 16 api.2ip.ua 3 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exedescription pid process target process PID 2700 set thread context of 4684 2700 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3716 set thread context of 536 3716 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.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:
3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exepid process 4684 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 4684 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 536 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 536 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exedescription pid process target process PID 2700 wrote to memory of 4684 2700 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 2700 wrote to memory of 4684 2700 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 2700 wrote to memory of 4684 2700 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 2700 wrote to memory of 4684 2700 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 2700 wrote to memory of 4684 2700 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 2700 wrote to memory of 4684 2700 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 2700 wrote to memory of 4684 2700 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 2700 wrote to memory of 4684 2700 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 2700 wrote to memory of 4684 2700 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 2700 wrote to memory of 4684 2700 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 4684 wrote to memory of 3056 4684 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe icacls.exe PID 4684 wrote to memory of 3056 4684 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe icacls.exe PID 4684 wrote to memory of 3056 4684 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe icacls.exe PID 4684 wrote to memory of 3716 4684 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 4684 wrote to memory of 3716 4684 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 4684 wrote to memory of 3716 4684 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3716 wrote to memory of 536 3716 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3716 wrote to memory of 536 3716 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3716 wrote to memory of 536 3716 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3716 wrote to memory of 536 3716 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3716 wrote to memory of 536 3716 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3716 wrote to memory of 536 3716 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3716 wrote to memory of 536 3716 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3716 wrote to memory of 536 3716 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3716 wrote to memory of 536 3716 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3716 wrote to memory of 536 3716 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2700 -
C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4684 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\4cd38d46-e08f-416e-8fd8-450ccba4790d" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3056 -
C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3716 -
C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:536
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD56728aea2631b86a76c237508d8ba9b55
SHA17a670f95cac088313f7558869162fe01c6dc0ec9
SHA256e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b
SHA512533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize410B
MD51be5cc99f62d4382ccb3d51c31a56e8c
SHA11b7d83e4cfa28e5aeeb8fd1655a758e5d9c572a4
SHA256622287a45aed5bf20f25cb3465b5d669c03185cf9156dac00ef31f7f3f0bbddb
SHA512eaf1e1f81a18900ae46a8ac6015712ac8b219d8f830a2f831687999656c620ea5a956edf242317e68472caebe5981f04736733d5d5106c2429d57114b7f0a9ef
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5430754119d690cd8dcfddbecee676e53
SHA15c16069d65e6785207ff38f043f6f27295012673
SHA25673ec1aff226676f024f6e468e8312e1e9044ad21f3311eb690c94cc6875494db
SHA512fb268528951113b87dc59b8b0da32992cdbcc387ee6b395b1d1e1c2be9248ef997fa0158f7c70feef4461a6422ee816967968075f47a54384af6af0cedf8ec56
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C:\Users\Admin\AppData\Local\4cd38d46-e08f-416e-8fd8-450ccba4790d\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
Filesize710KB
MD5c3cdc4206b45b5a62d65c9830bd4b069
SHA1d529698f023e3a58c255286fc03fcde61478ea7a
SHA2563f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4
SHA512528e0dcb5d7a8b71a9d03631adb39a75aad8e4c1799bc33b001f7111467adb164ed9f670948aa4b5f37627ffa1cd86d7430d612d86489de4410358a196f73dc3