Analysis
- max time kernel
146s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system - submitted
19/03/2024, 01:16
Static task
static1
Behavioral task
behavioral1
Sample
d719fb3907f47d91d33b86497eb07d88.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
d719fb3907f47d91d33b86497eb07d88.exe
Resource
win10v2004-20231215-en
General
- Target d719fb3907f47d91d33b86497eb07d88.exe
- Size 811KB
- Sample240319-bmsg3aec2y
- SHA256 6aca49f129d7eb89f198149671cfa552ddfbbc5dc40039dbadadcb7158431d61
- MD5 d719fb3907f47d91d33b86497eb07d88
- SHA1 6fbcbedeb4346d742b99fca9aa2cf0738f19ca77
- SHA512 475b847bc24f8de621ed6e128dbd8d60aaf4e9e4982729d013426887c03a01eb341e1642ddbe27e7d4a15e81f2a49055532e0c3efb375de0ab9e9b7cee680a56
- SSDEEP 12288:/hUA8ilQsk3LARKULCAhqJehiK7iPsVi8QjDxOTEyJl+7pZgwrjy6g0kbvFE:T8PsGETL9Q47mjNOTEoovLrsvW
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Extracted
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djvu
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http://sajdfue.com/test2/get.php
-
extension
.looy
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offline_id
1eSPzWRaNslCgtjBZfL5pzvovoiaVI4IZSnvAwt1
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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
- Detected Djvu ransomware 18 IoCs
resource yara_rule behavioral2/memory/4536-2-0x0000000004BC0000-0x0000000004CDB000-memory.dmp family_djvu behavioral2/memory/1568-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1568-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1568-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1568-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1568-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1952-25-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1952-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1952-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1952-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1952-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1952-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1952-40-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1952-41-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1952-51-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1952-52-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1952-64-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/636-92-0x0000000000980000-0x0000000000A80000-memory.dmp family_djvu - Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation d719fb3907f47d91d33b86497eb07d88.exe Key value queried \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation d719fb3907f47d91d33b86497eb07d88.exe - Executes dropped EXE 6 IoCs
pid Process 2928 build3.exe 4636 build3.exe 636 mstsca.exe 4376 mstsca.exe 3796 mstsca.exe 1832 mstsca.exe - Modifies file permissions 1 TTPs 1 IoCs
pid Process 4948 icacls.exe - Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e547fbea-953e-4024-abf0-954e75b1c221\\d719fb3907f47d91d33b86497eb07d88.exe\" --AutoStart" d719fb3907f47d91d33b86497eb07d88.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 5 api.2ip.ua 7 api.2ip.ua 21 api.2ip.ua - Suspicious use of SetThreadContext 5 IoCs
description pid Process procid_target PID 4536 set thread context of 1568 4536 d719fb3907f47d91d33b86497eb07d88.exe 84 PID 4052 set thread context of 1952 4052 d719fb3907f47d91d33b86497eb07d88.exe 88 PID 2928 set thread context of 4636 2928 build3.exe 98 PID 636 set thread context of 4376 636 mstsca.exe 102 PID 3796 set thread context of 1832 3796 mstsca.exe 106 - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 1440 schtasks.exe 2884 schtasks.exe - Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1568 d719fb3907f47d91d33b86497eb07d88.exe 1568 d719fb3907f47d91d33b86497eb07d88.exe 1952 d719fb3907f47d91d33b86497eb07d88.exe 1952 d719fb3907f47d91d33b86497eb07d88.exe - Suspicious use of WriteProcessMemory 62 IoCs
description pid Process procid_target PID 4536 wrote to memory of 1568 4536 d719fb3907f47d91d33b86497eb07d88.exe 84 PID 4536 wrote to memory of 1568 4536 d719fb3907f47d91d33b86497eb07d88.exe 84 PID 4536 wrote to memory of 1568 4536 d719fb3907f47d91d33b86497eb07d88.exe 84 PID 4536 wrote to memory of 1568 4536 d719fb3907f47d91d33b86497eb07d88.exe 84 PID 4536 wrote to memory of 1568 4536 d719fb3907f47d91d33b86497eb07d88.exe 84 PID 4536 wrote to memory of 1568 4536 d719fb3907f47d91d33b86497eb07d88.exe 84 PID 4536 wrote to memory of 1568 4536 d719fb3907f47d91d33b86497eb07d88.exe 84 PID 4536 wrote to memory of 1568 4536 d719fb3907f47d91d33b86497eb07d88.exe 84 PID 4536 wrote to memory of 1568 4536 d719fb3907f47d91d33b86497eb07d88.exe 84 PID 4536 wrote to memory of 1568 4536 d719fb3907f47d91d33b86497eb07d88.exe 84 PID 1568 wrote to memory of 4948 1568 d719fb3907f47d91d33b86497eb07d88.exe 85 PID 1568 wrote to memory of 4948 1568 d719fb3907f47d91d33b86497eb07d88.exe 85 PID 1568 wrote to memory of 4948 1568 d719fb3907f47d91d33b86497eb07d88.exe 85 PID 1568 wrote to memory of 4052 1568 d719fb3907f47d91d33b86497eb07d88.exe 86 PID 1568 wrote to memory of 4052 1568 d719fb3907f47d91d33b86497eb07d88.exe 86 PID 1568 wrote to memory of 4052 1568 d719fb3907f47d91d33b86497eb07d88.exe 86 PID 4052 wrote to memory of 1952 4052 d719fb3907f47d91d33b86497eb07d88.exe 88 PID 4052 wrote to memory of 1952 4052 d719fb3907f47d91d33b86497eb07d88.exe 88 PID 4052 wrote to memory of 1952 4052 d719fb3907f47d91d33b86497eb07d88.exe 88 PID 4052 wrote to memory of 1952 4052 d719fb3907f47d91d33b86497eb07d88.exe 88 PID 4052 wrote to memory of 1952 4052 d719fb3907f47d91d33b86497eb07d88.exe 88 PID 4052 wrote to memory of 1952 4052 d719fb3907f47d91d33b86497eb07d88.exe 88 PID 4052 wrote to memory of 1952 4052 d719fb3907f47d91d33b86497eb07d88.exe 88 PID 4052 wrote to memory of 1952 4052 d719fb3907f47d91d33b86497eb07d88.exe 88 PID 4052 wrote to memory of 1952 4052 d719fb3907f47d91d33b86497eb07d88.exe 88 PID 4052 wrote to memory of 1952 4052 d719fb3907f47d91d33b86497eb07d88.exe 88 PID 1952 wrote to memory of 2928 1952 d719fb3907f47d91d33b86497eb07d88.exe 96 PID 1952 wrote to memory of 2928 1952 d719fb3907f47d91d33b86497eb07d88.exe 96 PID 1952 wrote to memory of 2928 1952 d719fb3907f47d91d33b86497eb07d88.exe 96 PID 2928 wrote to memory of 4636 2928 build3.exe 98 PID 2928 wrote to memory of 4636 2928 build3.exe 98 PID 2928 wrote to memory of 4636 2928 build3.exe 98 PID 2928 wrote to memory of 4636 2928 build3.exe 98 PID 2928 wrote to memory of 4636 2928 build3.exe 98 PID 2928 wrote to memory of 4636 2928 build3.exe 98 PID 2928 wrote to memory of 4636 2928 build3.exe 98 PID 2928 wrote to memory of 4636 2928 build3.exe 98 PID 2928 wrote to memory of 4636 2928 build3.exe 98 PID 4636 wrote to memory of 1440 4636 build3.exe 99 PID 4636 wrote to memory of 1440 4636 build3.exe 99 PID 4636 wrote to memory of 1440 4636 build3.exe 99 PID 636 wrote to memory of 4376 636 mstsca.exe 102 PID 636 wrote to memory of 4376 636 mstsca.exe 102 PID 636 wrote to memory of 4376 636 mstsca.exe 102 PID 636 wrote to memory of 4376 636 mstsca.exe 102 PID 636 wrote to memory of 4376 636 mstsca.exe 102 PID 636 wrote to memory of 4376 636 mstsca.exe 102 PID 636 wrote to memory of 4376 636 mstsca.exe 102 PID 636 wrote to memory of 4376 636 mstsca.exe 102 PID 636 wrote to memory of 4376 636 mstsca.exe 102 PID 4376 wrote to memory of 2884 4376 mstsca.exe 103 PID 4376 wrote to memory of 2884 4376 mstsca.exe 103 PID 4376 wrote to memory of 2884 4376 mstsca.exe 103 PID 3796 wrote to memory of 1832 3796 mstsca.exe 106 PID 3796 wrote to memory of 1832 3796 mstsca.exe 106 PID 3796 wrote to memory of 1832 3796 mstsca.exe 106 PID 3796 wrote to memory of 1832 3796 mstsca.exe 106 PID 3796 wrote to memory of 1832 3796 mstsca.exe 106 PID 3796 wrote to memory of 1832 3796 mstsca.exe 106 PID 3796 wrote to memory of 1832 3796 mstsca.exe 106 PID 3796 wrote to memory of 1832 3796 mstsca.exe 106 PID 3796 wrote to memory of 1832 3796 mstsca.exe 106
Processes
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C:\Users\Admin\AppData\Local\Temp\d719fb3907f47d91d33b86497eb07d88.exe"C:\Users\Admin\AppData\Local\Temp\d719fb3907f47d91d33b86497eb07d88.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4536 -
C:\Users\Admin\AppData\Local\Temp\d719fb3907f47d91d33b86497eb07d88.exe"C:\Users\Admin\AppData\Local\Temp\d719fb3907f47d91d33b86497eb07d88.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1568 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\e547fbea-953e-4024-abf0-954e75b1c221" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4948
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C:\Users\Admin\AppData\Local\Temp\d719fb3907f47d91d33b86497eb07d88.exe"C:\Users\Admin\AppData\Local\Temp\d719fb3907f47d91d33b86497eb07d88.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4052 -
C:\Users\Admin\AppData\Local\Temp\d719fb3907f47d91d33b86497eb07d88.exe"C:\Users\Admin\AppData\Local\Temp\d719fb3907f47d91d33b86497eb07d88.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1952 -
C:\Users\Admin\AppData\Local\75745bcf-a874-4f94-b9e4-56ca8fe92f4c\build3.exe"C:\Users\Admin\AppData\Local\75745bcf-a874-4f94-b9e4-56ca8fe92f4c\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2928 -
C:\Users\Admin\AppData\Local\75745bcf-a874-4f94-b9e4-56ca8fe92f4c\build3.exe"C:\Users\Admin\AppData\Local\75745bcf-a874-4f94-b9e4-56ca8fe92f4c\build3.exe"6⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4636 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"7⤵
- Creates scheduled task(s)
PID:1440
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-
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C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:636 -
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4376 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"3⤵
- Creates scheduled task(s)
PID:2884
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C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3796 -
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe2⤵
- Executes dropped EXE
PID:1832
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
- Size 1KB
- SHA256 39dd29569cb51bc9ffb6f0b600e4cc81a65e911e874841e9d5c36143da35f90a
- MD5 8e2cf34a00a0fef512bf25108ae75e8c
- SHA1 ad8364712551b2ba8f6cde24f875105b21a2da9f
- SHA512 ad47f1e757194f3a3a6167ce9e5a19a0edbedb4536dfc0846ac22b98d300c4881877db4db98a9109b8fa1b4dc2a4696026a84f6e9619bf0703995f51837f0dbf
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
- Size 724B
- SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
- MD5 8202a1cd02e7d69597995cabbe881a12
- SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
- SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
- Size 410B
- SHA256 d22b15e48798d8299dede177e200f6971174ae153b41773fa0012db1bc0c18b5
- MD5 c9b4a78ef3ddbac397e4d1f2e0d048bf
- SHA1 3dd64cc29f62c88f1cfa5368d252a8f42f3c379b
- SHA512 5ef1cf129228d7739cfc73195aeeea214ec4e115e67612a1a04492508df4c486a31fe65a8db047dfe99c2c60255f0596fd7f156c7f1df9cfd36cbe9d72327f77
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
- Size 392B
- SHA256 aeec0efef00d68e2b8d23bc503e1014688f52c2ecfee34d5302099fee34a6867
- MD5 d6701972a70d5be262c202c69eccc6d5
- SHA1 27e494f9e3ed251c3cc1cf4a9af0a1a0c30a5b01
- SHA512 89dee9c0289331bff6b71805f9401a1dc2005027505a82915e48fe1ac692be0d07abbe5c68d353ec1b46db2a67b5e6f47309a09ff09dfef0984df919794da83f
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Local\75745bcf-a874-4f94-b9e4-56ca8fe92f4c\build2.exe
- Size 603B
- SHA256 cd14bf175eb4ee40474a82c7baeeff333ae10bc04332fe5b4c2e94a2a8690837
- MD5 f4c8bf96de8bbaf74d83de222338d37f
- SHA1 a6bca7d4c4a404f2d8c483d5fce2b9134504ced3
- SHA512 30d994abb30088f3dba1669cc9eb0bdfbbe2b45f5e8f98baf293655723b95022df0e1dc56cae7f890e9847392cec0ea9021e3022172ded39c07738540aa166cb
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Local\75745bcf-a874-4f94-b9e4-56ca8fe92f4c\build3.exe
- Size 299KB
- SHA256 fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408
- MD5 41b883a061c95e9b9cb17d4ca50de770
- SHA1 1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad
- SHA512 cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319
- SSDEEP 6144:2neDcgRQv5VaNT9DW7a6dtM9VstSttuvqIT:2O0v5VuT9DW7hdt9tKt2qI
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\e547fbea-953e-4024-abf0-954e75b1c221\d719fb3907f47d91d33b86497eb07d88.exe
- Size 811KB
- SHA256 6aca49f129d7eb89f198149671cfa552ddfbbc5dc40039dbadadcb7158431d61
- MD5 d719fb3907f47d91d33b86497eb07d88
- SHA1 6fbcbedeb4346d742b99fca9aa2cf0738f19ca77
- SHA512 475b847bc24f8de621ed6e128dbd8d60aaf4e9e4982729d013426887c03a01eb341e1642ddbe27e7d4a15e81f2a49055532e0c3efb375de0ab9e9b7cee680a56
- SSDEEP 12288:/hUA8ilQsk3LARKULCAhqJehiK7iPsVi8QjDxOTEyJl+7pZgwrjy6g0kbvFE:T8PsGETL9Q47mjNOTEoovLrsvW
- MD5 SHA1 SHA512 SSDEEP