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Analysis
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max time kernel
146s -
max time network
107s -
platform
windows11-21h2_x64 -
resource
win11-20240419-en -
resource tags
arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system -
submitted
29/04/2024, 15:44
Static task
static1
Behavioral task
behavioral1
Sample
6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe
Resource
win10v2004-20240419-en
Behavioral task
behavioral2
Sample
6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe
Resource
win11-20240419-en
General
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Target
6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe
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Size
702KB
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MD5
1e09f1352687fedf7b01243712c51af5
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SHA1
d20da181cdba8e27413dd21b7c3364d3035d19fc
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SHA256
6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f
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SHA512
ee38bff074e9f2235c63a9c4945d9c34b1cf62c08c0e325117dd01106b8bfaf0beb526fe100b6fb99b0fc737aadf1ae08587f5e3779dbe89603c636a096b0fdf
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SSDEEP
12288:OF3pjIcp1AnPZdIqNLegRYiHTftuL3l0SARntBztEkOdWr1CSOal1b/:83pjfp62gO7qSuB5edu0aLb/
Malware Config
Extracted
djvu
http://cajgtus.com/test2/get.php
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extension
.bgzq
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offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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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 16 IoCs
resource yara_rule behavioral2/memory/4532-2-0x0000000004980000-0x0000000004A9B000-memory.dmp family_djvu behavioral2/memory/4676-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4676-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4676-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4676-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4676-12-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/960-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/960-16-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/960-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/960-18-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/960-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/960-25-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/960-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/960-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/960-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/960-31-0x0000000000400000-0x0000000000537000-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 4188 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2878097196-921257239-309638238-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\202475da-133d-4e57-872a-8ab315044d28\\6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe\" --AutoStart" 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe -
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 1 api.2ip.ua 5 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 4532 set thread context of 4676 4532 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 80 PID 4224 set thread context of 960 4224 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.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 4676 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 4676 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 960 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 960 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 4532 wrote to memory of 4676 4532 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 80 PID 4532 wrote to memory of 4676 4532 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 80 PID 4532 wrote to memory of 4676 4532 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 80 PID 4532 wrote to memory of 4676 4532 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 80 PID 4532 wrote to memory of 4676 4532 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 80 PID 4532 wrote to memory of 4676 4532 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 80 PID 4532 wrote to memory of 4676 4532 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 80 PID 4532 wrote to memory of 4676 4532 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 80 PID 4532 wrote to memory of 4676 4532 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 80 PID 4532 wrote to memory of 4676 4532 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 80 PID 4676 wrote to memory of 4188 4676 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 81 PID 4676 wrote to memory of 4188 4676 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 81 PID 4676 wrote to memory of 4188 4676 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 81 PID 4676 wrote to memory of 4224 4676 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 82 PID 4676 wrote to memory of 4224 4676 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 82 PID 4676 wrote to memory of 4224 4676 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 82 PID 4224 wrote to memory of 960 4224 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 85 PID 4224 wrote to memory of 960 4224 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 85 PID 4224 wrote to memory of 960 4224 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 85 PID 4224 wrote to memory of 960 4224 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 85 PID 4224 wrote to memory of 960 4224 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 85 PID 4224 wrote to memory of 960 4224 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 85 PID 4224 wrote to memory of 960 4224 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 85 PID 4224 wrote to memory of 960 4224 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 85 PID 4224 wrote to memory of 960 4224 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 85 PID 4224 wrote to memory of 960 4224 6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe"C:\Users\Admin\AppData\Local\Temp\6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4532 -
C:\Users\Admin\AppData\Local\Temp\6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe"C:\Users\Admin\AppData\Local\Temp\6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4676 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\202475da-133d-4e57-872a-8ab315044d28" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4188
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C:\Users\Admin\AppData\Local\Temp\6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe"C:\Users\Admin\AppData\Local\Temp\6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4224 -
C:\Users\Admin\AppData\Local\Temp\6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe"C:\Users\Admin\AppData\Local\Temp\6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:960
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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\Local\202475da-133d-4e57-872a-8ab315044d28\6d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f.exe
Filesize702KB
MD51e09f1352687fedf7b01243712c51af5
SHA1d20da181cdba8e27413dd21b7c3364d3035d19fc
SHA2566d93f4d47ed5e0a4c86ba98060ce666d3f4ff67cf574d6d3e1b9a196f11dad4f
SHA512ee38bff074e9f2235c63a9c4945d9c34b1cf62c08c0e325117dd01106b8bfaf0beb526fe100b6fb99b0fc737aadf1ae08587f5e3779dbe89603c636a096b0fdf