Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
23-05-2024 04:04
Static task
static1
Behavioral task
behavioral1
Sample
519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe
Resource
win10v2004-20240508-en
General
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Target
519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe
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Size
711KB
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MD5
07116bba4c9f651cf2c4327698483aa0
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SHA1
02a9fc8459c6ad451ba571146d5211664b4276d3
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SHA256
519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d
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SHA512
d825dc67fbf663e6f193200aed834da7aa46396cd13b48f3c47298e984347730df7a99e48dd6b6e4b06805004ced2a2a761d626b1ebeb88e9607062e0f493ae2
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SSDEEP
12288:o4Amb9t3hc0lMxKvp30GfaOztaHNdvPRROnLTfp1WPhbFXMNZMCHcBiFBcDW7X:o49bLLgQ50GfaOzCnvPRWLV8PRFXMPHj
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
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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/4356-2-0x00000000049D0000-0x0000000004AEB000-memory.dmp family_djvu behavioral2/memory/1352-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1352-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1352-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1352-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1352-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2344-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2344-25-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2344-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2344-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2344-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2344-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2344-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2344-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2344-35-0x0000000000400000-0x0000000000537000-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:
519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\2d168c45-3840-470e-b09b-4f0eeea1629f\\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe\" --AutoStart" 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.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 13 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exedescription pid process target process PID 4356 set thread context of 1352 4356 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 3068 set thread context of 2344 3068 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.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:
519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exepid process 1352 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 1352 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 2344 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 2344 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exedescription pid process target process PID 4356 wrote to memory of 1352 4356 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 4356 wrote to memory of 1352 4356 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 4356 wrote to memory of 1352 4356 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 4356 wrote to memory of 1352 4356 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 4356 wrote to memory of 1352 4356 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 4356 wrote to memory of 1352 4356 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 4356 wrote to memory of 1352 4356 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 4356 wrote to memory of 1352 4356 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 4356 wrote to memory of 1352 4356 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 4356 wrote to memory of 1352 4356 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 1352 wrote to memory of 2784 1352 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe icacls.exe PID 1352 wrote to memory of 2784 1352 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe icacls.exe PID 1352 wrote to memory of 2784 1352 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe icacls.exe PID 1352 wrote to memory of 3068 1352 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 1352 wrote to memory of 3068 1352 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 1352 wrote to memory of 3068 1352 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 3068 wrote to memory of 2344 3068 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 3068 wrote to memory of 2344 3068 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 3068 wrote to memory of 2344 3068 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 3068 wrote to memory of 2344 3068 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 3068 wrote to memory of 2344 3068 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 3068 wrote to memory of 2344 3068 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 3068 wrote to memory of 2344 3068 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 3068 wrote to memory of 2344 3068 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 3068 wrote to memory of 2344 3068 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe PID 3068 wrote to memory of 2344 3068 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe"C:\Users\Admin\AppData\Local\Temp\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4356 -
C:\Users\Admin\AppData\Local\Temp\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe"C:\Users\Admin\AppData\Local\Temp\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1352 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\2d168c45-3840-470e-b09b-4f0eeea1629f" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2784 -
C:\Users\Admin\AppData\Local\Temp\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe"C:\Users\Admin\AppData\Local\Temp\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3068 -
C:\Users\Admin\AppData\Local\Temp\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe"C:\Users\Admin\AppData\Local\Temp\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2344
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
MD57575c39a544943a68ce6e709c586005a
SHA14874b30bd1d455b28a95c4e21c5aecd1ea043d7a
SHA2564737de49245ace1ca1fdeaacd5feee9bbda88bc6f42c84a1ea7d316383792cf8
SHA512abf3d85393725113e720cbe8980b369236511e3984e8cbfa795f19bb5d6e39822e80a835caeb498581797a74b349765ba1a27f26586a17a66ae1c88bd066a3d1
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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
MD565ae68a6680c8ed5e8a0438661ebd79d
SHA155bd6f67b205c85b4d592d16399c29f369c59a0f
SHA256961d09bbb40e45c2f149198c240a68a88124a71eb844ab1c5c67c9697fb81ae9
SHA512bb622a98e9d030485fa746a6347617ec5fbc89fe7307c90b6283c01c44deaedf0b5ce371c6e713ece746663bbe9a1337ba551c3b0e41f5c6fa65cfaa215b0a42
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD57be0aaf02b4c4a63f089d0218ab2457b
SHA134e400a2f665ea401c7fbc35e008596ea1976c6c
SHA256295931e0af145bfd280e141b1087d7d336fa1965a45dfb27b10f90a70eb16e95
SHA5121e834c2accb4dc25ea26d665721c8f2b4d8eff6232f80f8ceb514b43082e8633d394a5748f9f5dafdc55d1534ab9a3fb495235dd151c35aecbd03b2f51911975
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C:\Users\Admin\AppData\Local\2d168c45-3840-470e-b09b-4f0eeea1629f\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe
Filesize711KB
MD507116bba4c9f651cf2c4327698483aa0
SHA102a9fc8459c6ad451ba571146d5211664b4276d3
SHA256519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d
SHA512d825dc67fbf663e6f193200aed834da7aa46396cd13b48f3c47298e984347730df7a99e48dd6b6e4b06805004ced2a2a761d626b1ebeb88e9607062e0f493ae2