Analysis
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max time kernel
147s -
max time network
150s -
platform
windows11-21h2_x64 -
resource
win11-20240426-en -
resource tags
arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-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 behavioral2/memory/2060-2-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2060-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4468-4-0x0000000004B40000-0x0000000004C5B000-memory.dmp family_djvu behavioral2/memory/2060-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2060-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2060-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3892-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3892-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3892-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3892-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3892-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3892-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3892-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3892-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3892-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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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-1-5-21-1230210488-3096403634-4129516247-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\79eaf2df-fa92-47ff-899c-aa87d71f5c99\\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 1 api.2ip.ua 3 api.2ip.ua 7 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exedescription pid process target process PID 4468 set thread context of 2060 4468 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3352 set thread context of 3892 3352 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 2060 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 2060 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3892 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3892 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exedescription pid process target process PID 4468 wrote to memory of 2060 4468 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 4468 wrote to memory of 2060 4468 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 4468 wrote to memory of 2060 4468 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 4468 wrote to memory of 2060 4468 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 4468 wrote to memory of 2060 4468 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 4468 wrote to memory of 2060 4468 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 4468 wrote to memory of 2060 4468 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 4468 wrote to memory of 2060 4468 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 4468 wrote to memory of 2060 4468 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 4468 wrote to memory of 2060 4468 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 2060 wrote to memory of 4492 2060 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe icacls.exe PID 2060 wrote to memory of 4492 2060 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe icacls.exe PID 2060 wrote to memory of 4492 2060 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe icacls.exe PID 2060 wrote to memory of 3352 2060 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 2060 wrote to memory of 3352 2060 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 2060 wrote to memory of 3352 2060 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3352 wrote to memory of 3892 3352 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3352 wrote to memory of 3892 3352 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3352 wrote to memory of 3892 3352 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3352 wrote to memory of 3892 3352 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3352 wrote to memory of 3892 3352 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3352 wrote to memory of 3892 3352 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3352 wrote to memory of 3892 3352 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3352 wrote to memory of 3892 3352 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3352 wrote to memory of 3892 3352 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe PID 3352 wrote to memory of 3892 3352 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:4468 -
C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2060 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\79eaf2df-fa92-47ff-899c-aa87d71f5c99" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4492 -
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:3352 -
C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3892
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
MD5d0c1c70a9e787abc31e0577791f569e0
SHA1e50b0f424bad8626362fd5a401435a20175b1a18
SHA2568a0f18719084c32f430aca4c0e4998d30e3e54f06603e463b9b2a2cde7049e95
SHA5121cae9562eed2fd4398c43f688ecea741e7528704c8d8fc0441b8e58cb04e9554535aeadd57527686e73964e11297bd208ee4509c2384a2fa7530ccd5091b2801
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5a3aee276e5e93b74c5d8188a08ef4a4f
SHA1ab48b0c83a99344d42f41c6695c69f1720e7ca14
SHA256e26b19683c7d3ccc5176022615d7d21c368c87368e31ef2de5cf3d7cf744677f
SHA51298c1d47d9069493aac471057b0cd03d58ff657b3bd3e5cd5f852d667cc42f7e5043c56643a0fdca84ffcf9465bd47e2cd452685f49cddae2029fb2d0ad8e29dc
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C:\Users\Admin\AppData\Local\79eaf2df-fa92-47ff-899c-aa87d71f5c99\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
Filesize710KB
MD5c3cdc4206b45b5a62d65c9830bd4b069
SHA1d529698f023e3a58c255286fc03fcde61478ea7a
SHA2563f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4
SHA512528e0dcb5d7a8b71a9d03631adb39a75aad8e4c1799bc33b001f7111467adb164ed9f670948aa4b5f37627ffa1cd86d7430d612d86489de4410358a196f73dc3