Analysis
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max time kernel
143s -
max time network
118s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
25-04-2024 16:37
Static task
static1
Behavioral task
behavioral1
Sample
444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
Resource
win10v2004-20240226-en
General
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Target
444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
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Size
780KB
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MD5
f4c37292b365c19e6d2feeb6a17c4049
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SHA1
a7c201719a6c4e58f57baa2a88b110d72f3daefe
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SHA256
444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83
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SHA512
8436f1f96c2ea3487e1205d2f0dbf8db33fc622a9d863f39402802a8c16bb05897477ba58d57fcb7d7a6bb265c52a25331ac5505dd3ac2c6b3fc2823eb56f805
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SSDEEP
12288:6DcWGLixjy0li5QMCgpMeahQ+siBwpBezGbkhvYesVmKiOAfc4Cz9fA1iqCD:6iily4i3CgeSKBtXKiMt9fa8D
Malware Config
Extracted
djvu
http://cajgtus.com/test1/get.php
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extension
.bgjs
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offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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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 14 IoCs
Processes:
resource yara_rule behavioral1/memory/2176-2-0x0000000005A20000-0x0000000005B3B000-memory.dmp family_djvu behavioral1/memory/2040-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2040-7-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2040-8-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2040-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2928-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2928-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2928-48-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2928-49-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2928-50-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2928-53-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2928-55-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2928-56-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2928-57-0x0000000000400000-0x0000000000537000-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:
444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\34d97d37-c09e-4f86-afd8-a408b07b5d7c\\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe\" --AutoStart" 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.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:
444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exedescription pid process target process PID 2176 set thread context of 2040 2176 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2420 set thread context of 2928 2420 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 3 IoCs
Processes:
444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exepid process 2040 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 2928 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 2928 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe -
Suspicious use of WriteProcessMemory 30 IoCs
Processes:
444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exedescription pid process target process PID 2176 wrote to memory of 2040 2176 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2176 wrote to memory of 2040 2176 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2176 wrote to memory of 2040 2176 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2176 wrote to memory of 2040 2176 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2176 wrote to memory of 2040 2176 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2176 wrote to memory of 2040 2176 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2176 wrote to memory of 2040 2176 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2176 wrote to memory of 2040 2176 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2176 wrote to memory of 2040 2176 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2176 wrote to memory of 2040 2176 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2176 wrote to memory of 2040 2176 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2040 wrote to memory of 2856 2040 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe icacls.exe PID 2040 wrote to memory of 2856 2040 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe icacls.exe PID 2040 wrote to memory of 2856 2040 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe icacls.exe PID 2040 wrote to memory of 2856 2040 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe icacls.exe PID 2040 wrote to memory of 2420 2040 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2040 wrote to memory of 2420 2040 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2040 wrote to memory of 2420 2040 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2040 wrote to memory of 2420 2040 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2420 wrote to memory of 2928 2420 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2420 wrote to memory of 2928 2420 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2420 wrote to memory of 2928 2420 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2420 wrote to memory of 2928 2420 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2420 wrote to memory of 2928 2420 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2420 wrote to memory of 2928 2420 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2420 wrote to memory of 2928 2420 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2420 wrote to memory of 2928 2420 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2420 wrote to memory of 2928 2420 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2420 wrote to memory of 2928 2420 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe PID 2420 wrote to memory of 2928 2420 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe"C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2176 -
C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe"C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2040 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\34d97d37-c09e-4f86-afd8-a408b07b5d7c" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2856
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C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe"C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2420 -
C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe"C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2928
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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
MD5132a59b12289f608ea38eb370d498a8f
SHA10fd8a23d395d38719cb0b71ee10df56ce35a6c4c
SHA256d6fcf2cd41b542b6d7ee6daa10cf080f4b6220cbce855be03d689d1ad080ed9b
SHA512ea953e93faf4c78e1b9e3768a463f6b46548af00b430ebd275054f7da1e1f4c40746bd3ff4ca02c0fd107bf78b02b67069075939b719c00a7e4bc2f4ecb46da1
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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
MD59abe123be69d15e43d4ef72b7d0e2df1
SHA1be83e63c1f25a14aa5c13e3697abfd9946698750
SHA256a91eea27a0239e20133a228d8fe9cd8aa5bc397a52f8214c62c8b64857b93d3e
SHA512cb4ca25a8a746e7ab1f641104a03ae793885402b7ac15a465af5cff76645d7b631bee1944362b8fd9ff4a621cd0ba5668ddebcd6a88c27f6899a729b82d23141
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize344B
MD5600d6c919ee8076a8820e65451ee2812
SHA137358600d8271904ce1412855762f4a9d39602bb
SHA256cd80bf1669efc8efa3e7548a4de64f1a4f3da44b0b75d9e0c051b0098b925327
SHA5128bebf072c1c6d0445debc518554299d580c49deace771e4f67023d05db570f9cbeb233b3e5b0f3efef23e107dc629e8d32251faa64e4b43e716254af1f086886
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD598ce0a4a2b732d9e14638217eeff445c
SHA1b979c1bd516da8fce566b2d45eea54596b4820bf
SHA256162a3fead4457145ec43bcd15f0227cf4c1c08f1824fe33add827b58ac88b401
SHA51219ef3530248e5d43e19710fa2a27b42ff75276c9641ea57d650085093bb1b81dfb67328a7b99a6e8d49425f3770d344f1aa9066c958a0b809a7abbb78a8a9a06
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C:\Users\Admin\AppData\Local\34d97d37-c09e-4f86-afd8-a408b07b5d7c\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
Filesize780KB
MD5f4c37292b365c19e6d2feeb6a17c4049
SHA1a7c201719a6c4e58f57baa2a88b110d72f3daefe
SHA256444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83
SHA5128436f1f96c2ea3487e1205d2f0dbf8db33fc622a9d863f39402802a8c16bb05897477ba58d57fcb7d7a6bb265c52a25331ac5505dd3ac2c6b3fc2823eb56f805
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Filesize
65KB
MD5ac05d27423a85adc1622c714f2cb6184
SHA1b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA5126d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d