Analysis
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max time kernel
146s -
max time network
154s -
platform
windows11-21h2_x64 -
resource
win11-20240412-en -
resource tags
arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system -
submitted
16/04/2024, 00:01
Static task
static1
Behavioral task
behavioral1
Sample
2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral2
Sample
2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe
Resource
win11-20240412-en
General
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Target
2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe
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Size
811KB
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MD5
ebdd98ee7607a3d6300406ddcdb955b1
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SHA1
659a2dd87be33c334fc153c9a7d6867f4beea607
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SHA256
2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138
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SHA512
d8f240d51c6ca1ddee7c1602cd397c39ddd4aab8d050bc454fdbbcb65b7663ab0f53708b981eb2daa8b85cfe5892242b8f575784409fb8795838647d6673e350
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SSDEEP
12288:pbrgWXLSO3or/ljxXbIdRvr6ku0Hyi50njpAmvyiHZTnx0RYcD:pbxLrKJxELvrE0Hy00xvySf0RYY
Malware Config
Extracted
djvu
http://sajdfue.com/test2/get.php
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extension
.uazq
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offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://sajdfue.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 17 IoCs
resource yara_rule behavioral2/memory/3768-2-0x0000000004CF0000-0x0000000004E0B000-memory.dmp family_djvu behavioral2/memory/4864-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4864-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4864-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4864-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4864-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3732-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3732-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3732-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3732-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3732-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3732-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3732-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3732-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3732-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3732-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3732-37-0x0000000000400000-0x0000000000537000-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
pid Process 3620 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4041115548-3858121278-1660933110-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\0ec00c4b-da95-4020-b807-c94e2b29b681\\2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe\" --AutoStart" 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.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.
flow ioc 1 api.2ip.ua 11 api.2ip.ua 16 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 3768 set thread context of 4864 3768 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 81 PID 3796 set thread context of 3732 3796 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 86 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 4864 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 4864 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 3732 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 3732 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 3768 wrote to memory of 4864 3768 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 81 PID 3768 wrote to memory of 4864 3768 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 81 PID 3768 wrote to memory of 4864 3768 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 81 PID 3768 wrote to memory of 4864 3768 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 81 PID 3768 wrote to memory of 4864 3768 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 81 PID 3768 wrote to memory of 4864 3768 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 81 PID 3768 wrote to memory of 4864 3768 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 81 PID 3768 wrote to memory of 4864 3768 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 81 PID 3768 wrote to memory of 4864 3768 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 81 PID 3768 wrote to memory of 4864 3768 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 81 PID 4864 wrote to memory of 3620 4864 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 82 PID 4864 wrote to memory of 3620 4864 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 82 PID 4864 wrote to memory of 3620 4864 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 82 PID 4864 wrote to memory of 3796 4864 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 83 PID 4864 wrote to memory of 3796 4864 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 83 PID 4864 wrote to memory of 3796 4864 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 83 PID 3796 wrote to memory of 3732 3796 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 86 PID 3796 wrote to memory of 3732 3796 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 86 PID 3796 wrote to memory of 3732 3796 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 86 PID 3796 wrote to memory of 3732 3796 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 86 PID 3796 wrote to memory of 3732 3796 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 86 PID 3796 wrote to memory of 3732 3796 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 86 PID 3796 wrote to memory of 3732 3796 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 86 PID 3796 wrote to memory of 3732 3796 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 86 PID 3796 wrote to memory of 3732 3796 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 86 PID 3796 wrote to memory of 3732 3796 2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe"C:\Users\Admin\AppData\Local\Temp\2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3768 -
C:\Users\Admin\AppData\Local\Temp\2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe"C:\Users\Admin\AppData\Local\Temp\2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4864 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\0ec00c4b-da95-4020-b807-c94e2b29b681" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3620
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C:\Users\Admin\AppData\Local\Temp\2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe"C:\Users\Admin\AppData\Local\Temp\2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3796 -
C:\Users\Admin\AppData\Local\Temp\2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe"C:\Users\Admin\AppData\Local\Temp\2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3732
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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
MD53c6a98dff2c8e5d41183fb934602bccf
SHA1389eea4f6c8b9a19dd6efd65b2c979feeb4262a7
SHA2568c5e90026091280487ae42d5c0f266528cacb6de18c7f3d693ecfdb547b06ac8
SHA512fde8e5de812641dc896e8d8182dcf4244670e431f3310aba576f0f330a9d8a4221eb7513005e9755512d0c645cbf164c4c5f8872689d2e52a58b3f39668de8fd
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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
MD5c41d6cb6f3d5f8f8e14fc56a16082509
SHA1525fc197f9a2184a409d7b9482a2b84bb5b12559
SHA25607dcd6c74759bdde38c94a294da42be5ae0e6aad23a3c1d486c800c28126d0a8
SHA5120d67e253fff5444f7b9d72af3e3fc8a7cd8f670c4ae852c619df7b7eed775dedaee5095c09033e5c2f831a94514399481112bb366b53464285658758916199fd
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD57a2fb411d906ae6341854d895b992a14
SHA101184db179b8feb2c0fa6d52b5c089b300ddf3b6
SHA2562dbcc6b982c8a02447a4cd207f3f7cbad0d41768207745008506bbbd60cb22eb
SHA5125bab14f5d25e721595faf663aedf07e093ad178955c5faf05fbf1833b126133b6067e6d766603c646f1d06ea8ff8ae5777aa004b0975fd67dc92b1516a977267
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C:\Users\Admin\AppData\Local\0ec00c4b-da95-4020-b807-c94e2b29b681\2f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138.exe
Filesize811KB
MD5ebdd98ee7607a3d6300406ddcdb955b1
SHA1659a2dd87be33c334fc153c9a7d6867f4beea607
SHA2562f75621a9d1b0e38358b5a1e21bf0ddddadb8a6a1d714d761efa77024241a138
SHA512d8f240d51c6ca1ddee7c1602cd397c39ddd4aab8d050bc454fdbbcb65b7663ab0f53708b981eb2daa8b85cfe5892242b8f575784409fb8795838647d6673e350