Analysis
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max time kernel
148s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
21-05-2024 23:38
Static task
static1
Behavioral task
behavioral1
Sample
c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
Resource
win10v2004-20240508-en
General
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Target
c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
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Size
805KB
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MD5
503be6986d24118cfbe56e9cb9748193
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SHA1
025ae1229044bb5bf5559f9cb447d026391eb5df
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SHA256
c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf
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SHA512
a16e29bbdb70a9cdac67996e4e76e08b69830bb5ee4d432ba01adb5cae204105c81bd15a95c52d1a2199b76b87aa9a9c295fcafb4ec50565967645814368a175
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SSDEEP
12288:unHenMyYcoFXKrKtWe198EIXj24h1ogqMYVvrcVfY:k+nBEKuoe19IXjnvkVjcVg
Malware Config
Extracted
djvu
http://cajgtus.com/test2/get.php
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extension
.vehu
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offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://cajgtus.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 13 IoCs
Processes:
resource yara_rule behavioral1/memory/1336-6-0x0000000003E10000-0x0000000003F2B000-memory.dmp family_djvu behavioral1/memory/2136-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2136-7-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2136-8-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2136-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2520-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2520-45-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2520-44-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2520-46-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2520-49-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2520-52-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2520-51-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2520-53-0x0000000000400000-0x0000000000537000-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
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c9b8361f-d45f-44da-83d6-3d7aefcb9f03\\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe\" --AutoStart" c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.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.
Processes:
flow ioc 3 api.2ip.ua 4 api.2ip.ua 9 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exec3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exedescription pid process target process PID 1336 set thread context of 2136 1336 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2660 set thread context of 2520 2660 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exec3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exepid process 2136 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe 2136 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe 2520 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe 2520 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe -
Suspicious use of WriteProcessMemory 30 IoCs
Processes:
c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exec3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exec3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exedescription pid process target process PID 1336 wrote to memory of 2136 1336 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 1336 wrote to memory of 2136 1336 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 1336 wrote to memory of 2136 1336 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 1336 wrote to memory of 2136 1336 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 1336 wrote to memory of 2136 1336 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 1336 wrote to memory of 2136 1336 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 1336 wrote to memory of 2136 1336 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 1336 wrote to memory of 2136 1336 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 1336 wrote to memory of 2136 1336 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 1336 wrote to memory of 2136 1336 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 1336 wrote to memory of 2136 1336 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2136 wrote to memory of 2612 2136 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe icacls.exe PID 2136 wrote to memory of 2612 2136 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe icacls.exe PID 2136 wrote to memory of 2612 2136 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe icacls.exe PID 2136 wrote to memory of 2612 2136 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe icacls.exe PID 2136 wrote to memory of 2660 2136 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2136 wrote to memory of 2660 2136 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2136 wrote to memory of 2660 2136 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2136 wrote to memory of 2660 2136 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2660 wrote to memory of 2520 2660 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2660 wrote to memory of 2520 2660 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2660 wrote to memory of 2520 2660 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2660 wrote to memory of 2520 2660 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2660 wrote to memory of 2520 2660 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2660 wrote to memory of 2520 2660 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2660 wrote to memory of 2520 2660 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2660 wrote to memory of 2520 2660 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2660 wrote to memory of 2520 2660 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2660 wrote to memory of 2520 2660 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe PID 2660 wrote to memory of 2520 2660 c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1336 -
C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2136 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\c9b8361f-d45f-44da-83d6-3d7aefcb9f03" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2612 -
C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2660 -
C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2520
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD5a1d955617a4d146e70544d0d9a0390ca
SHA15ffdc4453b23e24a7cb0e634b26864c169f5257b
SHA2568dbff2c0018158256912d87dd495a68c351303a319f50f204a930317e867aeb3
SHA5120bffbc27638b12cc04f335de8c4f3c74df01ae55b56f389f8d046d797b4c62d31bbff057ea75ce32f67cdd3b878fd0aad3eb62e983f814296e1b94de3c6ba810
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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
MD5d315175b509deba138e5bb7cacb1985f
SHA1fa4c6b44ff8ce6374813705a3f25ba4c55d5237e
SHA2566a278ae551d30eda3ff074b68faa9bece949c0ece7731edbb52b3f89abd63c69
SHA51296b3058dbf2ecdd418a007c9697c95c5d78052643041ebd980224796ef177376eeaa5f2ceaa62bd7ca9686d46d60a8ab450ba41e8f14f2bece0e6e03e60c78c7
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize344B
MD54ad54d8d143cda817a555348579b84e2
SHA1f5bbf2fc432abfcc519035a4dfe5a9ac8c51d616
SHA256abc32abc9136c453a7031641238160f004eae494d2d30fbbf7de5361914b53e2
SHA512846de922a44cd013e50c90108102ddef2c717f6581fdab5f9b725385e45c67d784f276ab701e7cac9a9e209291c7f97809e51673277905a39c436e57795ec9d5
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD55149038ea355f9f5e247d1fb622dcf9a
SHA14c78c137a96a49d72bb6fab7fb6839c30c481db0
SHA256d2c535ba5942149c0ecf3d40d485d1bcf12cbc02ea9b515287ba9bd0dae06dab
SHA512b3ac5d79ccc109b90988c5b5a48e258d4e6c1c128e27bdfe46592921e17056e9973d3b756c156311483ecca515227cd5da4d5469e27e6b1778960ead563bb60a
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Filesize
65KB
MD5ac05d27423a85adc1622c714f2cb6184
SHA1b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA5126d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d
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C:\Users\Admin\AppData\Local\c9b8361f-d45f-44da-83d6-3d7aefcb9f03\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
Filesize805KB
MD5503be6986d24118cfbe56e9cb9748193
SHA1025ae1229044bb5bf5559f9cb447d026391eb5df
SHA256c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf
SHA512a16e29bbdb70a9cdac67996e4e76e08b69830bb5ee4d432ba01adb5cae204105c81bd15a95c52d1a2199b76b87aa9a9c295fcafb4ec50565967645814368a175