Analysis
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max time kernel
144s -
max time network
124s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
27/01/2024, 06:55
Static task
static1
Behavioral task
behavioral1
Sample
7990fa877fec785fe61a58c3c7a5ab76.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
7990fa877fec785fe61a58c3c7a5ab76.exe
Resource
win10v2004-20231215-en
General
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Target
7990fa877fec785fe61a58c3c7a5ab76.exe
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Size
726KB
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MD5
7990fa877fec785fe61a58c3c7a5ab76
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SHA1
deb2f3da015e94c6d4ef3ae14dd2e0df801d4686
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SHA256
27f13dee7cc319ab79efc4a3597e33a513cbd9457ccd570db534a730448b6dfd
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SHA512
4b92f1c133098cfd7ad8a3610cd6d74416257e3912ceec37d8a3916a7c62861562ff9f143d31833df711f5c8dceff09c69177e1daea2f1d8511c6fe7ba6d95f1
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SSDEEP
12288:MkEhD8/cHIH9L7kT05u3s01AykMjc6hDgiNFjTZtvOtZfI2weRjsxZBOYti:MkEB8tLgQ5A1Ay5c6BgiNFPWtJweWxti
Malware Config
Extracted
djvu
http://astdg.top/fhsgtsspen6/get.php
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extension
.reqg
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offline_id
ioYmb0jtMMtue7xjmkS3WQWGWLR8FTQhb2giQtt1
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payload_url
http://securebiz.org/dl/build2.exe
http://astdg.top/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 21 IoCs
resource yara_rule behavioral2/memory/1328-2-0x0000000004BF0000-0x0000000004D0B000-memory.dmp family_djvu behavioral2/memory/2304-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2304-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2304-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2304-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2304-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3664-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3664-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3664-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3664-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3664-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3664-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3664-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3664-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3664-39-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3664-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3664-41-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4732-57-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4732-58-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4732-59-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4732-62-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Renames multiple (163) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Checks computer location settings 2 TTPs 1 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 7990fa877fec785fe61a58c3c7a5ab76.exe -
Executes dropped EXE 2 IoCs
pid Process 4760 7990fa877fec785fe61a58c3c7a5ab76.exe 4732 7990fa877fec785fe61a58c3c7a5ab76.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 1316 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\\d00c35b7-0da9-41dd-bae0-3b1b428959ff\\7990fa877fec785fe61a58c3c7a5ab76.exe\" --AutoStart" 7990fa877fec785fe61a58c3c7a5ab76.exe -
Looks up external IP address via web service 4 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 19 api.2ip.ua 52 api.2ip.ua 6 api.2ip.ua 7 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 1328 set thread context of 2304 1328 7990fa877fec785fe61a58c3c7a5ab76.exe 89 PID 2112 set thread context of 3664 2112 7990fa877fec785fe61a58c3c7a5ab76.exe 93 PID 4760 set thread context of 4732 4760 7990fa877fec785fe61a58c3c7a5ab76.exe 103 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 2304 7990fa877fec785fe61a58c3c7a5ab76.exe 2304 7990fa877fec785fe61a58c3c7a5ab76.exe 3664 7990fa877fec785fe61a58c3c7a5ab76.exe 3664 7990fa877fec785fe61a58c3c7a5ab76.exe 4732 7990fa877fec785fe61a58c3c7a5ab76.exe 4732 7990fa877fec785fe61a58c3c7a5ab76.exe 3664 7990fa877fec785fe61a58c3c7a5ab76.exe 3664 7990fa877fec785fe61a58c3c7a5ab76.exe -
Suspicious use of WriteProcessMemory 36 IoCs
description pid Process procid_target PID 1328 wrote to memory of 2304 1328 7990fa877fec785fe61a58c3c7a5ab76.exe 89 PID 1328 wrote to memory of 2304 1328 7990fa877fec785fe61a58c3c7a5ab76.exe 89 PID 1328 wrote to memory of 2304 1328 7990fa877fec785fe61a58c3c7a5ab76.exe 89 PID 1328 wrote to memory of 2304 1328 7990fa877fec785fe61a58c3c7a5ab76.exe 89 PID 1328 wrote to memory of 2304 1328 7990fa877fec785fe61a58c3c7a5ab76.exe 89 PID 1328 wrote to memory of 2304 1328 7990fa877fec785fe61a58c3c7a5ab76.exe 89 PID 1328 wrote to memory of 2304 1328 7990fa877fec785fe61a58c3c7a5ab76.exe 89 PID 1328 wrote to memory of 2304 1328 7990fa877fec785fe61a58c3c7a5ab76.exe 89 PID 1328 wrote to memory of 2304 1328 7990fa877fec785fe61a58c3c7a5ab76.exe 89 PID 1328 wrote to memory of 2304 1328 7990fa877fec785fe61a58c3c7a5ab76.exe 89 PID 2304 wrote to memory of 1316 2304 7990fa877fec785fe61a58c3c7a5ab76.exe 90 PID 2304 wrote to memory of 1316 2304 7990fa877fec785fe61a58c3c7a5ab76.exe 90 PID 2304 wrote to memory of 1316 2304 7990fa877fec785fe61a58c3c7a5ab76.exe 90 PID 2304 wrote to memory of 2112 2304 7990fa877fec785fe61a58c3c7a5ab76.exe 92 PID 2304 wrote to memory of 2112 2304 7990fa877fec785fe61a58c3c7a5ab76.exe 92 PID 2304 wrote to memory of 2112 2304 7990fa877fec785fe61a58c3c7a5ab76.exe 92 PID 2112 wrote to memory of 3664 2112 7990fa877fec785fe61a58c3c7a5ab76.exe 93 PID 2112 wrote to memory of 3664 2112 7990fa877fec785fe61a58c3c7a5ab76.exe 93 PID 2112 wrote to memory of 3664 2112 7990fa877fec785fe61a58c3c7a5ab76.exe 93 PID 2112 wrote to memory of 3664 2112 7990fa877fec785fe61a58c3c7a5ab76.exe 93 PID 2112 wrote to memory of 3664 2112 7990fa877fec785fe61a58c3c7a5ab76.exe 93 PID 2112 wrote to memory of 3664 2112 7990fa877fec785fe61a58c3c7a5ab76.exe 93 PID 2112 wrote to memory of 3664 2112 7990fa877fec785fe61a58c3c7a5ab76.exe 93 PID 2112 wrote to memory of 3664 2112 7990fa877fec785fe61a58c3c7a5ab76.exe 93 PID 2112 wrote to memory of 3664 2112 7990fa877fec785fe61a58c3c7a5ab76.exe 93 PID 2112 wrote to memory of 3664 2112 7990fa877fec785fe61a58c3c7a5ab76.exe 93 PID 4760 wrote to memory of 4732 4760 7990fa877fec785fe61a58c3c7a5ab76.exe 103 PID 4760 wrote to memory of 4732 4760 7990fa877fec785fe61a58c3c7a5ab76.exe 103 PID 4760 wrote to memory of 4732 4760 7990fa877fec785fe61a58c3c7a5ab76.exe 103 PID 4760 wrote to memory of 4732 4760 7990fa877fec785fe61a58c3c7a5ab76.exe 103 PID 4760 wrote to memory of 4732 4760 7990fa877fec785fe61a58c3c7a5ab76.exe 103 PID 4760 wrote to memory of 4732 4760 7990fa877fec785fe61a58c3c7a5ab76.exe 103 PID 4760 wrote to memory of 4732 4760 7990fa877fec785fe61a58c3c7a5ab76.exe 103 PID 4760 wrote to memory of 4732 4760 7990fa877fec785fe61a58c3c7a5ab76.exe 103 PID 4760 wrote to memory of 4732 4760 7990fa877fec785fe61a58c3c7a5ab76.exe 103 PID 4760 wrote to memory of 4732 4760 7990fa877fec785fe61a58c3c7a5ab76.exe 103
Processes
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C:\Users\Admin\AppData\Local\Temp\7990fa877fec785fe61a58c3c7a5ab76.exe"C:\Users\Admin\AppData\Local\Temp\7990fa877fec785fe61a58c3c7a5ab76.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1328 -
C:\Users\Admin\AppData\Local\Temp\7990fa877fec785fe61a58c3c7a5ab76.exe"C:\Users\Admin\AppData\Local\Temp\7990fa877fec785fe61a58c3c7a5ab76.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2304 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\d00c35b7-0da9-41dd-bae0-3b1b428959ff" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1316
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C:\Users\Admin\AppData\Local\Temp\7990fa877fec785fe61a58c3c7a5ab76.exe"C:\Users\Admin\AppData\Local\Temp\7990fa877fec785fe61a58c3c7a5ab76.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2112 -
C:\Users\Admin\AppData\Local\Temp\7990fa877fec785fe61a58c3c7a5ab76.exe"C:\Users\Admin\AppData\Local\Temp\7990fa877fec785fe61a58c3c7a5ab76.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3664
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C:\Users\Admin\AppData\Local\d00c35b7-0da9-41dd-bae0-3b1b428959ff\7990fa877fec785fe61a58c3c7a5ab76.exeC:\Users\Admin\AppData\Local\d00c35b7-0da9-41dd-bae0-3b1b428959ff\7990fa877fec785fe61a58c3c7a5ab76.exe --Task1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4760 -
C:\Users\Admin\AppData\Local\d00c35b7-0da9-41dd-bae0-3b1b428959ff\7990fa877fec785fe61a58c3c7a5ab76.exeC:\Users\Admin\AppData\Local\d00c35b7-0da9-41dd-bae0-3b1b428959ff\7990fa877fec785fe61a58c3c7a5ab76.exe --Task2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:4732
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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
MD5117581c8a2ff4fce10d77d2f81dd0cdc
SHA1a0fbeeef3c720485767906ddf3d699f78bd3a692
SHA25614924e43f9d37b1bfca5c3d878e9ad833b26ce047840565801eb2aa2257770e2
SHA5124230d5299fb961cb1d2ea3bd971e3df2cc3bdd10ff4331e672bfb4ab49a68f757df0d433dc0cfc8f07a6b6e0b51166cb571eefa93eb9a41f98197fcce5eec9a8
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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
MD50e5059582cf6965707bf9e2ab3efb048
SHA13af8d3ce806f9995e406715fb23d38871562f789
SHA25609171da67630cea459e7706434e9bc33701e8c05a2471ad3c415667c4f3c3f73
SHA512299f051a19b8c3f1943b5c26aa90e9dc353d59e9c78b0da1f087b18219d3ca8b98e091b8f3983878c5ad4286a4fccf2d5d0e150400d7f1690e58508a174f97d1
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD59fdb4e6c3c1cde29d0362b275f5597b4
SHA1015118fb720342f3f20e1bdd2175f228e32ccbdd
SHA256ff577ca55f92e6f7b24c3e2f67077e8a0846ced58b760953b93777998fddd260
SHA5128590d8a45b9a58227ce11bdd8b877edf185ad3eeaa0605cb2069ea4e703f9b4743d14d3b8013d3377157bb9c960def744209cbfef21f84403704217c4caa308f
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C:\Users\Admin\AppData\Local\d00c35b7-0da9-41dd-bae0-3b1b428959ff\7990fa877fec785fe61a58c3c7a5ab76.exe
Filesize210KB
MD594f1879a2aebc92b2c5d126e2c829a37
SHA1cb251960be49d17028f5799e350fc40149b0278b
SHA256dce6668e8892c49469334e94a89f8ad5f3ec3e2d6b8fcd1f4b4a078266c0a08c
SHA51238e9a4a578d4e2274ad08a4c9afa03c974b2dd50da0a257a79e87bb1762e0f69921fe149166dbc5b2b6d53df0f083738546a6755e400237e1f792121b7141131
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C:\Users\Admin\AppData\Local\d00c35b7-0da9-41dd-bae0-3b1b428959ff\7990fa877fec785fe61a58c3c7a5ab76.exe
Filesize726KB
MD57990fa877fec785fe61a58c3c7a5ab76
SHA1deb2f3da015e94c6d4ef3ae14dd2e0df801d4686
SHA25627f13dee7cc319ab79efc4a3597e33a513cbd9457ccd570db534a730448b6dfd
SHA5124b92f1c133098cfd7ad8a3610cd6d74416257e3912ceec37d8a3916a7c62861562ff9f143d31833df711f5c8dceff09c69177e1daea2f1d8511c6fe7ba6d95f1