Analysis
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max time kernel
141s -
max time network
131s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
25-05-2024 19:10
Static task
static1
Behavioral task
behavioral1
Sample
5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
Resource
win10v2004-20240508-en
Behavioral task
behavioral2
Sample
5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
Resource
win11-20240426-en
General
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Target
5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
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Size
733KB
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MD5
a230bc33c976e62f89be6738a114cba5
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SHA1
3518ac087264deb96cce6227388df0e646261f41
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SHA256
5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236
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SHA512
1aa036717884f4ae84ad4c76e8d6c5853d5c49658f032d82922e0b151a9f30febc9051ba65f48bb64cceb6299039243be437b7ccff2b22c24d1d0814f61d17dc
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SSDEEP
12288:gPZRU01GBVNXYtiOAbaKK/zi6OouFam/UxjwaSU0yR2K6CXYXviVgmaa:gPk4GBVNnOAWpOou3AXr6C06emn
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/2692-2-0x0000000004A40000-0x0000000004B5B000-memory.dmp family_djvu behavioral1/memory/3556-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3556-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3556-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3556-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3556-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/368-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/368-25-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/368-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/368-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/368-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/368-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/368-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/368-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/368-35-0x0000000000400000-0x0000000000537000-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:
5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\630d9b91-99b1-4a81-856d-d485461b4469\\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe\" --AutoStart" 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.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 5 api.2ip.ua 6 api.2ip.ua 17 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exedescription pid process target process PID 2692 set thread context of 3556 2692 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 1984 set thread context of 368 1984 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.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:
5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exepid process 3556 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 3556 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 368 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 368 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exedescription pid process target process PID 2692 wrote to memory of 3556 2692 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 2692 wrote to memory of 3556 2692 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 2692 wrote to memory of 3556 2692 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 2692 wrote to memory of 3556 2692 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 2692 wrote to memory of 3556 2692 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 2692 wrote to memory of 3556 2692 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 2692 wrote to memory of 3556 2692 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 2692 wrote to memory of 3556 2692 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 2692 wrote to memory of 3556 2692 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 2692 wrote to memory of 3556 2692 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 3556 wrote to memory of 4704 3556 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe icacls.exe PID 3556 wrote to memory of 4704 3556 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe icacls.exe PID 3556 wrote to memory of 4704 3556 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe icacls.exe PID 3556 wrote to memory of 1984 3556 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 3556 wrote to memory of 1984 3556 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 3556 wrote to memory of 1984 3556 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 1984 wrote to memory of 368 1984 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 1984 wrote to memory of 368 1984 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 1984 wrote to memory of 368 1984 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 1984 wrote to memory of 368 1984 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 1984 wrote to memory of 368 1984 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 1984 wrote to memory of 368 1984 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 1984 wrote to memory of 368 1984 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 1984 wrote to memory of 368 1984 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 1984 wrote to memory of 368 1984 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe PID 1984 wrote to memory of 368 1984 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe"C:\Users\Admin\AppData\Local\Temp\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe"C:\Users\Admin\AppData\Local\Temp\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.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\630d9b91-99b1-4a81-856d-d485461b4469" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe"C:\Users\Admin\AppData\Local\Temp\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe"C:\Users\Admin\AppData\Local\Temp\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.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
MD58df6dedd4dd10eb8211463f82b129e29
SHA1ffc6e51cf829b481d789d8e3e61f6c7096fbde3e
SHA256a8400cc21263f2c44ccb301a3a1ef66a1ff009fd4d301362fd778e7b23a386d8
SHA51225fd6d8684ff8db3d40a8fe33267fd01d6456a84f81c7e579f7508c36558cf731a0ec8a2999a539aa5c1985dc45f7bd20d2a14a343b2326030941858f24c57f4
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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
MD58f7f587dd62160fc757f5f532d876ed4
SHA166375985176ca325b38ba4bc18534c0d8eca8628
SHA256f738a4120255e1c740380eee3a3394466880e65668742e503a2b6d4432e091df
SHA512d3d999ef450613709099c2bff9c30e131ae736bd22dda7e6a7c366cb692cfd637e0bef00df6a936936b86767111581c559ddb59ebb74fe9691cd3355d55727d4
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
392B
MD568417cab4de6a783e049920fa52742b8
SHA1baf51edebeb981d193527fad60af27160e9b1903
SHA256ecc367f01bd53f75f06d331a96fa34142bb8a9483e6248fb0463e64c6ab33be6
SHA512dba4f711137cb5a47be8207b9f7a71f1d7eac09510b27db8377f7b622413628c161f137bd08076e77b1ff68e9cb42742879756c7f00beef1a66469bc05b99206
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C:\Users\Admin\AppData\Local\630d9b91-99b1-4a81-856d-d485461b4469\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exeFilesize
733KB
MD5a230bc33c976e62f89be6738a114cba5
SHA13518ac087264deb96cce6227388df0e646261f41
SHA2565aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236
SHA5121aa036717884f4ae84ad4c76e8d6c5853d5c49658f032d82922e0b151a9f30febc9051ba65f48bb64cceb6299039243be437b7ccff2b22c24d1d0814f61d17dc
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memory/368-27-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/368-26-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/368-35-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/368-20-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/368-34-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/368-33-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/368-32-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/368-30-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/368-25-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2692-1-0x00000000049A0000-0x0000000004A3B000-memory.dmpFilesize
620KB
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memory/2692-2-0x0000000004A40000-0x0000000004B5B000-memory.dmpFilesize
1.1MB
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memory/3556-6-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3556-4-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3556-3-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3556-5-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3556-17-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB