Analysis
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max time kernel
143s -
max time network
128s -
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 15:49
Static task
static1
Behavioral task
behavioral1
Sample
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
Resource
win11-20240426-en
General
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Target
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
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Size
708KB
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MD5
7f3b269130931ecd64e35f048c3a5a45
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SHA1
7434c49a3386c9e6efe98e7f5345c922299adf9c
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SHA256
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501
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SHA512
b941031026e4f3e113606a69630d8fdef11e3fcb79bde51ea238f0a73f84850a52b4e64d39568be052dafc4505ae256b2f503bd38a73d6be436b63fcab86ad83
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SSDEEP
12288:OOfdNRXlGGDv4r+no5iA8uPurQdPbaeNTL58eGpf8lVnKKZ+2yxu6e:O2HzLnqXPEOjJhN8eGpyKGfy3
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/1100-2-0x00000000041F0000-0x000000000430B000-memory.dmp family_djvu behavioral2/memory/2068-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2068-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2068-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2068-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2068-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3928-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3928-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3928-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3928-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3928-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3928-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3928-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3928-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3928-37-0x0000000000400000-0x0000000000537000-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:
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3062789476-783164490-2318012559-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\9cfd3c99-c2d3-4f6f-9f69-d21ec0c8e0ae\\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe\" --AutoStart" dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.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 2 api.2ip.ua 7 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exedc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exedescription pid process target process PID 1100 set thread context of 2068 1100 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2176 set thread context of 3928 2176 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.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:
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exedc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exepid process 2068 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe 2068 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe 3928 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe 3928 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exedc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exedc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exedescription pid process target process PID 1100 wrote to memory of 2068 1100 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 1100 wrote to memory of 2068 1100 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 1100 wrote to memory of 2068 1100 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 1100 wrote to memory of 2068 1100 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 1100 wrote to memory of 2068 1100 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 1100 wrote to memory of 2068 1100 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 1100 wrote to memory of 2068 1100 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 1100 wrote to memory of 2068 1100 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 1100 wrote to memory of 2068 1100 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 1100 wrote to memory of 2068 1100 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2068 wrote to memory of 1152 2068 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe icacls.exe PID 2068 wrote to memory of 1152 2068 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe icacls.exe PID 2068 wrote to memory of 1152 2068 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe icacls.exe PID 2068 wrote to memory of 2176 2068 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2068 wrote to memory of 2176 2068 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2068 wrote to memory of 2176 2068 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2176 wrote to memory of 3928 2176 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2176 wrote to memory of 3928 2176 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2176 wrote to memory of 3928 2176 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2176 wrote to memory of 3928 2176 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2176 wrote to memory of 3928 2176 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2176 wrote to memory of 3928 2176 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2176 wrote to memory of 3928 2176 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2176 wrote to memory of 3928 2176 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2176 wrote to memory of 3928 2176 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2176 wrote to memory of 3928 2176 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe"C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1100 -
C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe"C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2068 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\9cfd3c99-c2d3-4f6f-9f69-d21ec0c8e0ae" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1152 -
C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe"C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2176 -
C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe"C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3928
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
MD56dbb4d5b3897ea5508cdd3ea5b4c3490
SHA19d97f182e2ca8ab7416be1c4d4b0aaf8b909daeb
SHA256624ef7b397077a26fc2d18514710c6653125b0f128c31045f73ec86fcae336a5
SHA512700f1edd488e3b3c1909bafe07acb8147cd1d65c20867501afc40cd111959a872523e4baba5310e4972e89952370f1c3549bdf0f232f56f4c3c6ab2ada836ca5
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD50a194bbc022670ac4b84b57daeaa63d2
SHA1258b433fbb958cf8cfae069d528fc6fc41d3f5b6
SHA2560d3b2f4e354baea0cfe160a1771d8d0f622ee365a367ec6d7e7a8164c7f7ed13
SHA5122f9b523f3404cb43460fdac6a2e540811b44906f89b268c95b32c7f6f63f2de943fae60d2da4d9e06861f48531a02da43174dd21abe8b69dd7a62bd45acad323
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C:\Users\Admin\AppData\Local\9cfd3c99-c2d3-4f6f-9f69-d21ec0c8e0ae\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
Filesize708KB
MD57f3b269130931ecd64e35f048c3a5a45
SHA17434c49a3386c9e6efe98e7f5345c922299adf9c
SHA256dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501
SHA512b941031026e4f3e113606a69630d8fdef11e3fcb79bde51ea238f0a73f84850a52b4e64d39568be052dafc4505ae256b2f503bd38a73d6be436b63fcab86ad83