Analysis
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max time kernel
149s -
max time network
157s -
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, 19:56
Static task
static1
Behavioral task
behavioral1
Sample
79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral2
Sample
79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe
Resource
win11-20240412-en
General
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Target
79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe
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Size
819KB
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MD5
cabc5d4f81025ea43f2477adb2e2627d
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SHA1
f4273023a6efe7896d1f6ef9ba1ad5c04e7fe3a7
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SHA256
79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b
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SHA512
f97a6c0d32ed8bbdeacf29a1a9f84458bc26801b86504a90594652aef2cbce30cfc96407c453d171f1d3072a7e402bd26871f1fdd3e41e5a5143576b17e4ad4f
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SSDEEP
12288:N3d+kz5MNm50f2CBKi0yau4QmZj7UIFZbtEsWKm6NZwt2warGT2XgnWr:N3GmyPMyau4jZ3JZCsw6ot2E2w2
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/2040-2-0x0000000004C90000-0x0000000004DAB000-memory.dmp family_djvu behavioral2/memory/4804-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4804-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4804-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4804-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4804-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1920-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1920-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1920-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1920-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1920-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1920-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1920-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1920-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1920-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1920-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1920-39-0x0000000000400000-0x0000000000537000-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 3004 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-243033537-3771492294-1461557691-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\2db20583-a3a5-44bb-b1ae-fd0eebffe91c\\79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe\" --AutoStart" 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.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 2040 set thread context of 4804 2040 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 81 PID 1856 set thread context of 1920 1856 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 86 -
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 4804 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 4804 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 1920 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 1920 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 2040 wrote to memory of 4804 2040 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 81 PID 2040 wrote to memory of 4804 2040 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 81 PID 2040 wrote to memory of 4804 2040 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 81 PID 2040 wrote to memory of 4804 2040 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 81 PID 2040 wrote to memory of 4804 2040 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 81 PID 2040 wrote to memory of 4804 2040 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 81 PID 2040 wrote to memory of 4804 2040 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 81 PID 2040 wrote to memory of 4804 2040 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 81 PID 2040 wrote to memory of 4804 2040 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 81 PID 2040 wrote to memory of 4804 2040 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 81 PID 4804 wrote to memory of 3004 4804 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 82 PID 4804 wrote to memory of 3004 4804 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 82 PID 4804 wrote to memory of 3004 4804 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 82 PID 4804 wrote to memory of 1856 4804 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 83 PID 4804 wrote to memory of 1856 4804 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 83 PID 4804 wrote to memory of 1856 4804 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 83 PID 1856 wrote to memory of 1920 1856 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 86 PID 1856 wrote to memory of 1920 1856 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 86 PID 1856 wrote to memory of 1920 1856 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 86 PID 1856 wrote to memory of 1920 1856 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 86 PID 1856 wrote to memory of 1920 1856 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 86 PID 1856 wrote to memory of 1920 1856 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 86 PID 1856 wrote to memory of 1920 1856 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 86 PID 1856 wrote to memory of 1920 1856 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 86 PID 1856 wrote to memory of 1920 1856 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 86 PID 1856 wrote to memory of 1920 1856 79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe"C:\Users\Admin\AppData\Local\Temp\79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2040 -
C:\Users\Admin\AppData\Local\Temp\79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe"C:\Users\Admin\AppData\Local\Temp\79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4804 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\2db20583-a3a5-44bb-b1ae-fd0eebffe91c" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3004
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C:\Users\Admin\AppData\Local\Temp\79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe"C:\Users\Admin\AppData\Local\Temp\79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1856 -
C:\Users\Admin\AppData\Local\Temp\79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe"C:\Users\Admin\AppData\Local\Temp\79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:1920
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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
MD5f387c740c473efe63d4032941654a5be
SHA1f7282763258453833c4be2ddae471f3e920a5263
SHA25681ac7d07ea325edb8c2de60894636507c7c9b0c83085d87834967c879b419136
SHA51222c9592f91e6bc105040cb1081315d0d9b453363f908ea2fddd43737b995056f1290d58be83fb8e894713888129c0eb3d89b2f1c2dc21ab5fe2ad0677823dfdd
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5c0a2510d40b44fc6b4a3348742653003
SHA1b1653f2d804e63f8e1ac992d7e69c75125d26e13
SHA2564f74e03bfa79c12f4d2b5f69e2d0e5eb79babce52a7b1636a5b8bac8239071cd
SHA5122771108809fd3955ab158837204fb14b216c532e24b8065bceefdaf51c2330d409e07d5d3b4b1162ef70fc198e7b0e2b6fb2ed67dd7f97b6efb3ad2b8b50e43e
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C:\Users\Admin\AppData\Local\2db20583-a3a5-44bb-b1ae-fd0eebffe91c\79147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b.exe
Filesize819KB
MD5cabc5d4f81025ea43f2477adb2e2627d
SHA1f4273023a6efe7896d1f6ef9ba1ad5c04e7fe3a7
SHA25679147711755a81a678f0ae1de32757babf1ce43ad8f9375a36bfde621e86ed6b
SHA512f97a6c0d32ed8bbdeacf29a1a9f84458bc26801b86504a90594652aef2cbce30cfc96407c453d171f1d3072a7e402bd26871f1fdd3e41e5a5143576b17e4ad4f