Analysis
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max time kernel
117s -
max time network
117s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
24-05-2024 14:46
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-24_2a63f576879a9738b176b5036b73c2a3_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-24_2a63f576879a9738b176b5036b73c2a3_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-24_2a63f576879a9738b176b5036b73c2a3_bkransomware.exe
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Size
71KB
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MD5
2a63f576879a9738b176b5036b73c2a3
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SHA1
4446063948b99f1e43407707b9989c8b2ae021fc
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SHA256
ba415b4ebcb0b5a592c2ecbbf95765e54c32fa20b6617595adb294e3b40a6324
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SHA512
fde8cc2db4bdd4df7e13331dbb603fb4aca5760d3684ca51baa1924053980b991dd17529685d28afcd3def2fbcc2577ca695e76eaddcd06bdf8309a6ab439d21
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT1:ZRpAyazIliazT1
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 1724 CTS.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 2 IoCs
Processes:
2024-05-24_2a63f576879a9738b176b5036b73c2a3_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-24_2a63f576879a9738b176b5036b73c2a3_bkransomware.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" CTS.exe -
Drops file in Windows directory 2 IoCs
Processes:
2024-05-24_2a63f576879a9738b176b5036b73c2a3_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-24_2a63f576879a9738b176b5036b73c2a3_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-24_2a63f576879a9738b176b5036b73c2a3_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2844 2024-05-24_2a63f576879a9738b176b5036b73c2a3_bkransomware.exe Token: SeDebugPrivilege 1724 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-05-24_2a63f576879a9738b176b5036b73c2a3_bkransomware.exedescription pid process target process PID 2844 wrote to memory of 1724 2844 2024-05-24_2a63f576879a9738b176b5036b73c2a3_bkransomware.exe CTS.exe PID 2844 wrote to memory of 1724 2844 2024-05-24_2a63f576879a9738b176b5036b73c2a3_bkransomware.exe CTS.exe PID 2844 wrote to memory of 1724 2844 2024-05-24_2a63f576879a9738b176b5036b73c2a3_bkransomware.exe CTS.exe PID 2844 wrote to memory of 1724 2844 2024-05-24_2a63f576879a9738b176b5036b73c2a3_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-24_2a63f576879a9738b176b5036b73c2a3_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-24_2a63f576879a9738b176b5036b73c2a3_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2844 -
C:\Windows\CTS.exe"C:\Windows\CTS.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:1724
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\FatLKrj9DNTmEFG.exeFilesize
71KB
MD5f23f2c01c73900c2d05b6ff931d98630
SHA14b9dafbc35f45b154da9a2d2583d8f4df42c4c5c
SHA25626ae565847f776fc0a0d086fef0ed687e46adf9210548007f6bc15a3ec1f0eb7
SHA5128e21ea03c60dd2366c4a7e64dd236f5c016d50040d6134cb2cbb48ce589c58db2fd915427627d7fcb81d62725a43d0c7ffba923f1d2c318feb76a7d126c1b7ea
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C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432