Analysis
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max time kernel
147s -
max time network
150s -
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, 20:08
Static task
static1
Behavioral task
behavioral1
Sample
e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral2
Sample
e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe
Resource
win11-20240412-en
General
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Target
e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe
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Size
819KB
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MD5
bd5b5a965a4c6686b45ab1b04308f846
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SHA1
299acc22ef2a984a551742e0932180388f05c1df
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SHA256
e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4
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SHA512
4ec023c1261e5b6c0f92053df7a0fdfbbd9231463b6f130ba8327e7cfc34b1d97b1c123975c44155c569b040e78cd29a4958c6fcda94b3acca95153d1098cad7
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SSDEEP
12288:p302+BkzBWU8pv7+2uJMPNsm17R8Cigjp074+BlelKFzNBY2k9Qt7hdkMPTfPJU0:p3a7duJMWmn854+3P5Nt7hPfPO/uA8Z
Malware Config
Extracted
djvu
http://sajdfue.com/test2/get.php
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extension
.uazq
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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/4816-2-0x0000000004CD0000-0x0000000004DEB000-memory.dmp family_djvu behavioral2/memory/1380-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1380-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1380-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1380-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1380-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4544-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4544-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4544-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4544-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4544-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4544-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4544-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4544-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4544-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4544-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4544-39-0x0000000000400000-0x0000000000537000-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 1516 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2718508534-2116753757-2794822388-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c9b519f1-26e4-4524-a3b1-07cae1dda016\\e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe\" --AutoStart" e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.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 2 api.2ip.ua 6 api.2ip.ua 1 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 4816 set thread context of 1380 4816 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 80 PID 3580 set thread context of 4544 3580 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 85 -
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 1380 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 1380 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 4544 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 4544 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 4816 wrote to memory of 1380 4816 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 80 PID 4816 wrote to memory of 1380 4816 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 80 PID 4816 wrote to memory of 1380 4816 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 80 PID 4816 wrote to memory of 1380 4816 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 80 PID 4816 wrote to memory of 1380 4816 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 80 PID 4816 wrote to memory of 1380 4816 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 80 PID 4816 wrote to memory of 1380 4816 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 80 PID 4816 wrote to memory of 1380 4816 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 80 PID 4816 wrote to memory of 1380 4816 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 80 PID 4816 wrote to memory of 1380 4816 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 80 PID 1380 wrote to memory of 1516 1380 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 81 PID 1380 wrote to memory of 1516 1380 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 81 PID 1380 wrote to memory of 1516 1380 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 81 PID 1380 wrote to memory of 3580 1380 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 82 PID 1380 wrote to memory of 3580 1380 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 82 PID 1380 wrote to memory of 3580 1380 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 82 PID 3580 wrote to memory of 4544 3580 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 85 PID 3580 wrote to memory of 4544 3580 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 85 PID 3580 wrote to memory of 4544 3580 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 85 PID 3580 wrote to memory of 4544 3580 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 85 PID 3580 wrote to memory of 4544 3580 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 85 PID 3580 wrote to memory of 4544 3580 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 85 PID 3580 wrote to memory of 4544 3580 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 85 PID 3580 wrote to memory of 4544 3580 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 85 PID 3580 wrote to memory of 4544 3580 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 85 PID 3580 wrote to memory of 4544 3580 e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe"C:\Users\Admin\AppData\Local\Temp\e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4816 -
C:\Users\Admin\AppData\Local\Temp\e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe"C:\Users\Admin\AppData\Local\Temp\e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1380 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\c9b519f1-26e4-4524-a3b1-07cae1dda016" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1516
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C:\Users\Admin\AppData\Local\Temp\e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe"C:\Users\Admin\AppData\Local\Temp\e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3580 -
C:\Users\Admin\AppData\Local\Temp\e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe"C:\Users\Admin\AppData\Local\Temp\e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4544
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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
MD58f019f59ff3327706c8cfa0ea394bec0
SHA17d611e5d801424c4e5f20ade81b7419f0edaa973
SHA25688daa9462d0844f6023b4429b41bd40965bc39533ebc12388fb411186f5ba610
SHA512874468930a555d7033ca62f3aee2948c853fdeeba9117ccac471a0d9f9b35fd7ba4b20fca2dac92ffd6e0ef49028e58b98e5730d388fb0937773c3dbfd98fe87
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5e9bd1ca32dd612d1668f9eb814361200
SHA1706d3fc7f06694f17cecd0f508c1cb2cf8b18ddc
SHA256152aa3e69a1d0e505d85273fe4facf507e4403cb759574ad5e678fc8babe3c0a
SHA5129729915ab4e96a630a3499ce83a310c77121bd24335563ee0ffc0c605d1067100bde609a5fea88112629a1b0522b64432bc7f40d130598186a94bc741258079f
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C:\Users\Admin\AppData\Local\c9b519f1-26e4-4524-a3b1-07cae1dda016\e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4.exe
Filesize819KB
MD5bd5b5a965a4c6686b45ab1b04308f846
SHA1299acc22ef2a984a551742e0932180388f05c1df
SHA256e27f72f9af46b84ad025e906084ae71a8581ca4f633331454f51cde2692c54d4
SHA5124ec023c1261e5b6c0f92053df7a0fdfbbd9231463b6f130ba8327e7cfc34b1d97b1c123975c44155c569b040e78cd29a4958c6fcda94b3acca95153d1098cad7