Analysis
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max time kernel
143s -
max time network
123s -
platform
windows11-21h2_x64 -
resource
win11-20240426-en -
resource tags
arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system -
submitted
21-05-2024 12:59
Static task
static1
Behavioral task
behavioral1
Sample
7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe
Resource
win11-20240426-en
General
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Target
7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe
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Size
708KB
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MD5
2bf0bdb1df4b48c79f1025be56129f5c
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SHA1
ac09221c18bd9a10347c90b4778995d11639dc72
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SHA256
7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473
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SHA512
3bae13941eb2614351af6f68e7f4b80e9f69401c678de666c1115ba7714ddbacff5eb4b379ff196d20ddc6ad2b53cfc3bed7fc28fa7d57b5cd3221660d50dd71
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SSDEEP
12288:nYYRITq/ev0TZQBgWSKdeaR/QshrK0Neqbr0kNpJ2+PIiLjlz:nPR3ev0KNBYspfeQgkNKcbL5
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 15 IoCs
Processes:
resource yara_rule behavioral2/memory/3544-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3544-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3544-2-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3412-4-0x0000000004320000-0x000000000443B000-memory.dmp family_djvu behavioral2/memory/3544-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3544-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1108-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1108-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1108-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1108-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1108-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1108-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1108-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1108-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1108-37-0x0000000000400000-0x0000000000537000-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:
7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2551177587-3778486488-1329702901-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4c0441e4-00c5-45de-a0ca-54a30571c14c\\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe\" --AutoStart" 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.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 1 api.2ip.ua 3 api.2ip.ua 6 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exedescription pid process target process PID 3412 set thread context of 3544 3412 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 4044 set thread context of 1108 4044 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.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:
7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exepid process 3544 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 3544 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 1108 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 1108 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exedescription pid process target process PID 3412 wrote to memory of 3544 3412 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 3412 wrote to memory of 3544 3412 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 3412 wrote to memory of 3544 3412 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 3412 wrote to memory of 3544 3412 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 3412 wrote to memory of 3544 3412 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 3412 wrote to memory of 3544 3412 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 3412 wrote to memory of 3544 3412 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 3412 wrote to memory of 3544 3412 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 3412 wrote to memory of 3544 3412 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 3412 wrote to memory of 3544 3412 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 3544 wrote to memory of 3492 3544 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe icacls.exe PID 3544 wrote to memory of 3492 3544 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe icacls.exe PID 3544 wrote to memory of 3492 3544 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe icacls.exe PID 3544 wrote to memory of 4044 3544 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 3544 wrote to memory of 4044 3544 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 3544 wrote to memory of 4044 3544 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 4044 wrote to memory of 1108 4044 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 4044 wrote to memory of 1108 4044 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 4044 wrote to memory of 1108 4044 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 4044 wrote to memory of 1108 4044 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 4044 wrote to memory of 1108 4044 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 4044 wrote to memory of 1108 4044 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 4044 wrote to memory of 1108 4044 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 4044 wrote to memory of 1108 4044 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 4044 wrote to memory of 1108 4044 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe PID 4044 wrote to memory of 1108 4044 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe 7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe"C:\Users\Admin\AppData\Local\Temp\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3412 -
C:\Users\Admin\AppData\Local\Temp\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe"C:\Users\Admin\AppData\Local\Temp\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3544 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\4c0441e4-00c5-45de-a0ca-54a30571c14c" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3492 -
C:\Users\Admin\AppData\Local\Temp\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe"C:\Users\Admin\AppData\Local\Temp\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4044 -
C:\Users\Admin\AppData\Local\Temp\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe"C:\Users\Admin\AppData\Local\Temp\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:1108
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
MD5df80f9ba75076db634761b6132e0d4e3
SHA107983946fb660752c7cccb2ef82d01ec4c9ecc5d
SHA256d5ff96fd8b416de93a85783192206224cf8821c240cd8ff755f2e8270153dd99
SHA5124ec734c5d29e9ce00b00e42b627253195e8c7a158433fedfcee428e692a6501981c33d7c8a39235f8b691f087145cdbe660b430493edbeedb12588c5cdd5a66a
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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
MD55ee5c55b4c2646d3d2facb71dba94667
SHA10d98b11363dca1d047670a86255b68274a664e3b
SHA25639870a4e82775b3e1dd717dd816bf16d08132311fc5142c01b54f5bf20b80482
SHA5120272d5f0a8af7e17ccc8428ea0068f585a4cbf9a171f57be612c1be50ab672f21ef9e720dde7b39efa0d1969b2c00eaadb06d1e211acdcc0409b5256aafd6d3b
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD57067c29cbe54fc716cf3b1f07ae78370
SHA17a734bce1085a34f1b5ffa3315eefa8f7baa5b7e
SHA256cfa23be393c5761b8e353b47afe97c4fab92462247d7e855f6db4db51ab5b65f
SHA512d49c6418e9e4571dee6e95ae7917c31b7ae8c76c7f9f339b7722e94df2bb484135f31891ff5b3354da20068fed4c24a6de43459b8b45d6594edd4a9a0eb66a39
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C:\Users\Admin\AppData\Local\4c0441e4-00c5-45de-a0ca-54a30571c14c\7f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473.exe
Filesize708KB
MD52bf0bdb1df4b48c79f1025be56129f5c
SHA1ac09221c18bd9a10347c90b4778995d11639dc72
SHA2567f093120b8a10e06972ea0be4b26b1e9b10b63791a6d0f5145075fb532adb473
SHA5123bae13941eb2614351af6f68e7f4b80e9f69401c678de666c1115ba7714ddbacff5eb4b379ff196d20ddc6ad2b53cfc3bed7fc28fa7d57b5cd3221660d50dd71