Analysis
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max time kernel
149s -
max time network
151s -
platform
windows11-21h2_x64 -
resource
win11-20240412-en -
resource tags
arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system -
submitted
15/04/2024, 23:27
Static task
static1
Behavioral task
behavioral1
Sample
50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral2
Sample
50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe
Resource
win11-20240412-en
General
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Target
50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe
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Size
860KB
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MD5
7bf2ed31e5b9c59d24f750dbbcf10ab5
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SHA1
1ff4a18a6d8ec058be1896dc90757f42e60c588b
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SHA256
50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496
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SHA512
88ef1d7c63190df6e832dbb71f1790911e5f0b41c492de124f605d4a261e7c8b7a4519e23fc6d8abc9db642940431c97a622e6a7b6f71d7086644a1c7525c04d
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SSDEEP
12288:aPeK5kzr8+6omE6wZGkJWGcowKFUXqtDvGBf+MpMMFUMxO38/njdk4:aPQN6jPZK2qgf+MtFURGnjh
Malware Config
Extracted
djvu
http://sajdfue.com/test1/get.php
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extension
.uajs
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offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://sajdfue.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 17 IoCs
resource yara_rule behavioral2/memory/2336-2-0x0000000004CA0000-0x0000000004DBB000-memory.dmp family_djvu behavioral2/memory/656-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/656-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/656-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/656-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/656-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4484-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4484-25-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4484-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4484-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4484-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4484-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4484-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4484-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4484-39-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4484-40-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4484-41-0x0000000000400000-0x0000000000537000-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 1060 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3263309122-2820180308-3568046652-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\8032b57f-c2ee-4e04-83b9-a1d42c353bb7\\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe\" --AutoStart" 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.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 1 api.2ip.ua 2 api.2ip.ua 8 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 2336 set thread context of 656 2336 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 78 PID 4320 set thread context of 4484 4320 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 83 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 656 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 656 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 4484 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 4484 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 2336 wrote to memory of 656 2336 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 78 PID 2336 wrote to memory of 656 2336 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 78 PID 2336 wrote to memory of 656 2336 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 78 PID 2336 wrote to memory of 656 2336 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 78 PID 2336 wrote to memory of 656 2336 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 78 PID 2336 wrote to memory of 656 2336 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 78 PID 2336 wrote to memory of 656 2336 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 78 PID 2336 wrote to memory of 656 2336 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 78 PID 2336 wrote to memory of 656 2336 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 78 PID 2336 wrote to memory of 656 2336 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 78 PID 656 wrote to memory of 1060 656 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 79 PID 656 wrote to memory of 1060 656 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 79 PID 656 wrote to memory of 1060 656 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 79 PID 656 wrote to memory of 4320 656 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 80 PID 656 wrote to memory of 4320 656 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 80 PID 656 wrote to memory of 4320 656 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 80 PID 4320 wrote to memory of 4484 4320 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 83 PID 4320 wrote to memory of 4484 4320 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 83 PID 4320 wrote to memory of 4484 4320 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 83 PID 4320 wrote to memory of 4484 4320 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 83 PID 4320 wrote to memory of 4484 4320 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 83 PID 4320 wrote to memory of 4484 4320 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 83 PID 4320 wrote to memory of 4484 4320 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 83 PID 4320 wrote to memory of 4484 4320 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 83 PID 4320 wrote to memory of 4484 4320 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 83 PID 4320 wrote to memory of 4484 4320 50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe"C:\Users\Admin\AppData\Local\Temp\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2336 -
C:\Users\Admin\AppData\Local\Temp\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe"C:\Users\Admin\AppData\Local\Temp\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:656 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\8032b57f-c2ee-4e04-83b9-a1d42c353bb7" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1060
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C:\Users\Admin\AppData\Local\Temp\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe"C:\Users\Admin\AppData\Local\Temp\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4320 -
C:\Users\Admin\AppData\Local\Temp\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe"C:\Users\Admin\AppData\Local\Temp\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4484
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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
MD53c6a98dff2c8e5d41183fb934602bccf
SHA1389eea4f6c8b9a19dd6efd65b2c979feeb4262a7
SHA2568c5e90026091280487ae42d5c0f266528cacb6de18c7f3d693ecfdb547b06ac8
SHA512fde8e5de812641dc896e8d8182dcf4244670e431f3310aba576f0f330a9d8a4221eb7513005e9755512d0c645cbf164c4c5f8872689d2e52a58b3f39668de8fd
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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
MD59a159a096bfbecae70a0583baa15f2bc
SHA1d33a2f2a1deab401933c924d5fa6eb14a3d2718a
SHA2564894418011e794e79cdbd8cfcdd8fac5c57c356c91b11cd9a943954a3e194e2f
SHA5128da0a3a05edf94ed44d7f8c59f8f694e6712c7c214d3cb1def24dfd956ed23e87d1090ab5d871e50ece4dd8af95732209b09bbd1d2d5fc763ac9217d73b3141c
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5467bf8606e273d2f9c12984bc4b9809d
SHA19aa946948634a5ee67b3488135014e049a24c181
SHA256f6eb9b2062836fef76891672afd1fade9d40e99226cdf12708268eb448867364
SHA5126e103959f5c9d947b518ba32a2f178971fef8291e3b3496669a85e8e3421c4fcb47196e5e0b6ec8910d300bdb3790863c3c355e955919cc95b9fb015d15f9100
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C:\Users\Admin\AppData\Local\8032b57f-c2ee-4e04-83b9-a1d42c353bb7\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe
Filesize860KB
MD57bf2ed31e5b9c59d24f750dbbcf10ab5
SHA11ff4a18a6d8ec058be1896dc90757f42e60c588b
SHA25650979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496
SHA51288ef1d7c63190df6e832dbb71f1790911e5f0b41c492de124f605d4a261e7c8b7a4519e23fc6d8abc9db642940431c97a622e6a7b6f71d7086644a1c7525c04d