Analysis
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max time kernel
142s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
28/01/2024, 04:22
Static task
static1
Behavioral task
behavioral1
Sample
7c2428bc20c16c8fd744c1216032336e.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
7c2428bc20c16c8fd744c1216032336e.exe
Resource
win10v2004-20231222-en
General
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Target
7c2428bc20c16c8fd744c1216032336e.exe
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Size
744KB
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MD5
7c2428bc20c16c8fd744c1216032336e
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SHA1
eed631c49a30baf635422abbffe2ef95b06eaec0
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SHA256
2a8a855ea51edbb8079331fafdb95680727e210756efaa00f2dec1fa60bfe2bb
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SHA512
19f63de6c09e3124a685da026e916225ab0949d766df83b38f5eedc17186f34dd83688066b2adfa8158df7b015eeace3a00eb599cd25bde952ae8e653a03fd88
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SSDEEP
12288:0YceV2ak78+GXU3yXSaqqKnr8feg7UxcpRbr1JCnoCpHpYBFDq6XwoO:0mV2ak78Pk3MSzvnSB4xcRv1JwoCHYBp
Malware Config
Extracted
djvu
http://astdg.top/fhsgtsspen6/get.php
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extension
.nooa
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offline_id
PLtnD1U6oAmgxgJ2nJik1mY9SwUQg07CiN0zSet1
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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 15 IoCs
resource yara_rule behavioral1/memory/1700-2-0x0000000004630000-0x000000000474B000-memory.dmp family_djvu behavioral1/memory/2224-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2224-7-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2224-8-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2224-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2608-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2608-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2608-52-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2608-53-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2608-54-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2608-58-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2608-61-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2608-60-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2608-62-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2608-63-0x0000000000400000-0x0000000000537000-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 2592 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1268429524-3929314613-1992311491-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b7457ef8-8382-4409-906a-8322cca04a35\\7c2428bc20c16c8fd744c1216032336e.exe\" --AutoStart" 7c2428bc20c16c8fd744c1216032336e.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 1700 set thread context of 2224 1700 7c2428bc20c16c8fd744c1216032336e.exe 28 PID 2904 set thread context of 2608 2904 7c2428bc20c16c8fd744c1216032336e.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 2224 7c2428bc20c16c8fd744c1216032336e.exe 2608 7c2428bc20c16c8fd744c1216032336e.exe 2608 7c2428bc20c16c8fd744c1216032336e.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 1700 wrote to memory of 2224 1700 7c2428bc20c16c8fd744c1216032336e.exe 28 PID 1700 wrote to memory of 2224 1700 7c2428bc20c16c8fd744c1216032336e.exe 28 PID 1700 wrote to memory of 2224 1700 7c2428bc20c16c8fd744c1216032336e.exe 28 PID 1700 wrote to memory of 2224 1700 7c2428bc20c16c8fd744c1216032336e.exe 28 PID 1700 wrote to memory of 2224 1700 7c2428bc20c16c8fd744c1216032336e.exe 28 PID 1700 wrote to memory of 2224 1700 7c2428bc20c16c8fd744c1216032336e.exe 28 PID 1700 wrote to memory of 2224 1700 7c2428bc20c16c8fd744c1216032336e.exe 28 PID 1700 wrote to memory of 2224 1700 7c2428bc20c16c8fd744c1216032336e.exe 28 PID 1700 wrote to memory of 2224 1700 7c2428bc20c16c8fd744c1216032336e.exe 28 PID 1700 wrote to memory of 2224 1700 7c2428bc20c16c8fd744c1216032336e.exe 28 PID 1700 wrote to memory of 2224 1700 7c2428bc20c16c8fd744c1216032336e.exe 28 PID 2224 wrote to memory of 2592 2224 7c2428bc20c16c8fd744c1216032336e.exe 29 PID 2224 wrote to memory of 2592 2224 7c2428bc20c16c8fd744c1216032336e.exe 29 PID 2224 wrote to memory of 2592 2224 7c2428bc20c16c8fd744c1216032336e.exe 29 PID 2224 wrote to memory of 2592 2224 7c2428bc20c16c8fd744c1216032336e.exe 29 PID 2224 wrote to memory of 2904 2224 7c2428bc20c16c8fd744c1216032336e.exe 30 PID 2224 wrote to memory of 2904 2224 7c2428bc20c16c8fd744c1216032336e.exe 30 PID 2224 wrote to memory of 2904 2224 7c2428bc20c16c8fd744c1216032336e.exe 30 PID 2224 wrote to memory of 2904 2224 7c2428bc20c16c8fd744c1216032336e.exe 30 PID 2904 wrote to memory of 2608 2904 7c2428bc20c16c8fd744c1216032336e.exe 31 PID 2904 wrote to memory of 2608 2904 7c2428bc20c16c8fd744c1216032336e.exe 31 PID 2904 wrote to memory of 2608 2904 7c2428bc20c16c8fd744c1216032336e.exe 31 PID 2904 wrote to memory of 2608 2904 7c2428bc20c16c8fd744c1216032336e.exe 31 PID 2904 wrote to memory of 2608 2904 7c2428bc20c16c8fd744c1216032336e.exe 31 PID 2904 wrote to memory of 2608 2904 7c2428bc20c16c8fd744c1216032336e.exe 31 PID 2904 wrote to memory of 2608 2904 7c2428bc20c16c8fd744c1216032336e.exe 31 PID 2904 wrote to memory of 2608 2904 7c2428bc20c16c8fd744c1216032336e.exe 31 PID 2904 wrote to memory of 2608 2904 7c2428bc20c16c8fd744c1216032336e.exe 31 PID 2904 wrote to memory of 2608 2904 7c2428bc20c16c8fd744c1216032336e.exe 31 PID 2904 wrote to memory of 2608 2904 7c2428bc20c16c8fd744c1216032336e.exe 31
Processes
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C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe"C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1700 -
C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe"C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2224 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\b7457ef8-8382-4409-906a-8322cca04a35" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2592
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C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe"C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2904 -
C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe"C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2608
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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
MD5b40baee421e93a6145908f67787a291a
SHA1311874de97781222e06810a295e2f78a67b84f81
SHA25625d9d82b04a8a02ccdf9e5980ff2749edcae335faf854d05e24a4a42b35bfa17
SHA51277ceb1d112977f51b89484cbf29c7e299b9e44ba8e8f3daba20cfc71782b2cb1de99c58aaeae4f9741cb13a7389743863927cec42036666e3acf980be2cfd935
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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
MD5707d9a15027b3f8639b348621028e493
SHA12b935cf02e98d337a37caddf49804552fc93040a
SHA25676bfbecaa87db84c07e50f24fdcfb9e70c976cb96c6d5ff291b0b59e1a9c9b16
SHA51288a7c37e44f1aa7d0e9a317daf2d0e76ec52c801761eff494337be05a14a565fca6ec38810f890b3d22a3c1c6f382dfb41b451e05eb2a48fb47f7df8b57c8b68
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize344B
MD517f6020649f5793ae98f14daf0fab546
SHA10b8c25f260b664d77f967ee4c9bb16a8c22c0056
SHA25634ccb6a63785a376928457201aa24950e23c0462a09a855c0498a45166af9456
SHA5126e82127fc8a4e56c2c88e60ef51ff4a868cd649e9fcec905b7173db539c59cd8a210d79a7fe4d0dd198e949b0c4532bbbea320f500b2e200fe939c8e82a00b38
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5d8e9a9e4130b15b18a3063fba8fe8c0e
SHA125a3e87a452f9f6e3f88a042c7428e20d1abc468
SHA2569dcbf787433a6ad8e684de0662466aeae178f87349e94158ae51aa76cdbdb333
SHA512d2cca10e2b5a2f3ba748d660421c4bd043f0091b068341cd42454ad7a6cde27270338ea6223d4574436f0b304e6c3646cb97fa5c17e2877ebec82ef9f64cfa3a
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Filesize
65KB
MD5ac05d27423a85adc1622c714f2cb6184
SHA1b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA5126d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d
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C:\Users\Admin\AppData\Local\b7457ef8-8382-4409-906a-8322cca04a35\7c2428bc20c16c8fd744c1216032336e.exe
Filesize744KB
MD57c2428bc20c16c8fd744c1216032336e
SHA1eed631c49a30baf635422abbffe2ef95b06eaec0
SHA2562a8a855ea51edbb8079331fafdb95680727e210756efaa00f2dec1fa60bfe2bb
SHA51219f63de6c09e3124a685da026e916225ab0949d766df83b38f5eedc17186f34dd83688066b2adfa8158df7b015eeace3a00eb599cd25bde952ae8e653a03fd88