Analysis
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max time kernel
141s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
25/01/2024, 04:39
Static task
static1
Behavioral task
behavioral1
Sample
73c1f532fb36af32c4bf0396e36a046c.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
73c1f532fb36af32c4bf0396e36a046c.exe
Resource
win10v2004-20231215-en
General
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Target
73c1f532fb36af32c4bf0396e36a046c.exe
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Size
787KB
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MD5
73c1f532fb36af32c4bf0396e36a046c
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SHA1
50d79516412f9f40ce0c65fef0bacc99ed16361f
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SHA256
219371ac3b82f569f98a692a680f54aad32a7932e7f94da9d51c6a2738d59c94
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SHA512
96d97622ae4ab607423fb7c0e9e2ed8a6f39ac4b5933cbde84d91b6a235fc291d8ff0fcf67d4a2dc1d38203432b32a226baf63832ab38c6a9ad02f53be033979
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SSDEEP
12288:hksmHsAz1XoTtgdGigT84EbBfo2YRJ2zVGGDMgjT7BX9aokgDHkwB7yBPAi:hk9MtgdGieEbfi4JGQUokgDEwIBPA
Malware Config
Extracted
djvu
http://astdg.top/nddddhsspen6/get.php
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extension
.moqs
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offline_id
CatwRkqdYh2Jomn6DqwFoGgcSbDsle1xlE1NPtt1
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payload_url
http://securebiz.org/dl/build2.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 14 IoCs
resource yara_rule behavioral1/memory/2080-4-0x0000000002150000-0x000000000226B000-memory.dmp family_djvu behavioral1/memory/2916-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2916-7-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2916-8-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2916-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2736-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2736-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2736-49-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2736-50-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2736-51-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2736-55-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2736-58-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2736-57-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2736-59-0x0000000000400000-0x0000000000537000-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 1184 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-928733405-3780110381-2966456290-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7c02b0c0-3136-4e77-8233-08a2ca25cc53\\73c1f532fb36af32c4bf0396e36a046c.exe\" --AutoStart" 73c1f532fb36af32c4bf0396e36a046c.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 3 api.2ip.ua 4 api.2ip.ua 9 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 2080 set thread context of 2916 2080 73c1f532fb36af32c4bf0396e36a046c.exe 28 PID 2728 set thread context of 2736 2728 73c1f532fb36af32c4bf0396e36a046c.exe 31 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 3 IoCs
pid Process 2916 73c1f532fb36af32c4bf0396e36a046c.exe 2736 73c1f532fb36af32c4bf0396e36a046c.exe 2736 73c1f532fb36af32c4bf0396e36a046c.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2080 wrote to memory of 2916 2080 73c1f532fb36af32c4bf0396e36a046c.exe 28 PID 2080 wrote to memory of 2916 2080 73c1f532fb36af32c4bf0396e36a046c.exe 28 PID 2080 wrote to memory of 2916 2080 73c1f532fb36af32c4bf0396e36a046c.exe 28 PID 2080 wrote to memory of 2916 2080 73c1f532fb36af32c4bf0396e36a046c.exe 28 PID 2080 wrote to memory of 2916 2080 73c1f532fb36af32c4bf0396e36a046c.exe 28 PID 2080 wrote to memory of 2916 2080 73c1f532fb36af32c4bf0396e36a046c.exe 28 PID 2080 wrote to memory of 2916 2080 73c1f532fb36af32c4bf0396e36a046c.exe 28 PID 2080 wrote to memory of 2916 2080 73c1f532fb36af32c4bf0396e36a046c.exe 28 PID 2080 wrote to memory of 2916 2080 73c1f532fb36af32c4bf0396e36a046c.exe 28 PID 2080 wrote to memory of 2916 2080 73c1f532fb36af32c4bf0396e36a046c.exe 28 PID 2080 wrote to memory of 2916 2080 73c1f532fb36af32c4bf0396e36a046c.exe 28 PID 2916 wrote to memory of 1184 2916 73c1f532fb36af32c4bf0396e36a046c.exe 29 PID 2916 wrote to memory of 1184 2916 73c1f532fb36af32c4bf0396e36a046c.exe 29 PID 2916 wrote to memory of 1184 2916 73c1f532fb36af32c4bf0396e36a046c.exe 29 PID 2916 wrote to memory of 1184 2916 73c1f532fb36af32c4bf0396e36a046c.exe 29 PID 2916 wrote to memory of 2728 2916 73c1f532fb36af32c4bf0396e36a046c.exe 30 PID 2916 wrote to memory of 2728 2916 73c1f532fb36af32c4bf0396e36a046c.exe 30 PID 2916 wrote to memory of 2728 2916 73c1f532fb36af32c4bf0396e36a046c.exe 30 PID 2916 wrote to memory of 2728 2916 73c1f532fb36af32c4bf0396e36a046c.exe 30 PID 2728 wrote to memory of 2736 2728 73c1f532fb36af32c4bf0396e36a046c.exe 31 PID 2728 wrote to memory of 2736 2728 73c1f532fb36af32c4bf0396e36a046c.exe 31 PID 2728 wrote to memory of 2736 2728 73c1f532fb36af32c4bf0396e36a046c.exe 31 PID 2728 wrote to memory of 2736 2728 73c1f532fb36af32c4bf0396e36a046c.exe 31 PID 2728 wrote to memory of 2736 2728 73c1f532fb36af32c4bf0396e36a046c.exe 31 PID 2728 wrote to memory of 2736 2728 73c1f532fb36af32c4bf0396e36a046c.exe 31 PID 2728 wrote to memory of 2736 2728 73c1f532fb36af32c4bf0396e36a046c.exe 31 PID 2728 wrote to memory of 2736 2728 73c1f532fb36af32c4bf0396e36a046c.exe 31 PID 2728 wrote to memory of 2736 2728 73c1f532fb36af32c4bf0396e36a046c.exe 31 PID 2728 wrote to memory of 2736 2728 73c1f532fb36af32c4bf0396e36a046c.exe 31 PID 2728 wrote to memory of 2736 2728 73c1f532fb36af32c4bf0396e36a046c.exe 31
Processes
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C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe"C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2080 -
C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe"C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2916 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\7c02b0c0-3136-4e77-8233-08a2ca25cc53" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1184
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C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe"C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2728 -
C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe"C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2736
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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
MD5819d2f6d228f94bfebac03edbfa4bc64
SHA1257acbdf2270c5285962d10460a77f422143cc8d
SHA256e8b016b694a9c3224b6a405cf52010c03b7bc6c8948ecc8a3d9aaa39a18f6d47
SHA512b81c03ca94d21cdb106281fa478dccd390e07bd0a03d0077952041f3d1d41a671ac9a3d4c97d41d9c8f74b14214abfcaff696a10d0615b603a7a9b1a67adde67
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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
MD5a50bfa043cd6730f71233e1f1eb82d07
SHA1d874c00220588acf9f9d3d12ab32d6da8484b88e
SHA256571944c30b02f033d864fe2717f18319aaaeeaa8c3fab6918a4c83cb9fa078f9
SHA512e3f81410aa3ea5c4c99410b8f374c76af86ab0a296332a00d040558813f82504ce5ec831adc01ab0f4fbf09b7efc7bef8f8162b8a74d63366220ba89d48ea3d5
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize344B
MD5d7ec9dbf92b76cc2c32440d0ec9970cb
SHA1c5920652a5280b96812d8f2d612cbd6101e281ee
SHA25609cfb151bc405c0210541b64f2a205bb38b99bcb8be1106e6c9013b2c8e685a5
SHA512e357d4036cf2ae5dad93b24f32c2cd29afbcb824c91642559e1712b18bf00d7dbb3127ca2208d8c412ca1f2aeaa0cb139a4a196f63d5f44637df46f27878efdb
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD505bb2f81e36f97aeba09c18b0489ef0d
SHA101ada11b01654267961cc060aa6a909093a1d002
SHA2561e94b2321533b2a646e1486ee4f70b613582b52fd6d31828479092e39a6e7cfd
SHA5128c6a57fd1002b29b70e7a41ff0d62e531f24ce611078b4c0db93df6ed0e4087632da9a8b898207281e3f6e0ca3dca5091ae77c5910a54da12e247a81ce2603ad
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C:\Users\Admin\AppData\Local\7c02b0c0-3136-4e77-8233-08a2ca25cc53\73c1f532fb36af32c4bf0396e36a046c.exe
Filesize787KB
MD573c1f532fb36af32c4bf0396e36a046c
SHA150d79516412f9f40ce0c65fef0bacc99ed16361f
SHA256219371ac3b82f569f98a692a680f54aad32a7932e7f94da9d51c6a2738d59c94
SHA51296d97622ae4ab607423fb7c0e9e2ed8a6f39ac4b5933cbde84d91b6a235fc291d8ff0fcf67d4a2dc1d38203432b32a226baf63832ab38c6a9ad02f53be033979
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Filesize
65KB
MD5ac05d27423a85adc1622c714f2cb6184
SHA1b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA5126d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d