Analysis
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max time kernel
122s -
max time network
127s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
27-05-2024 06:31
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe
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Size
71KB
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MD5
6f9920cf81c169dd0e4dad7ffedd4785
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SHA1
33f22f894b423c7956701307f6a7fb1721ad7756
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SHA256
d21df160b38e060e6552b89534a2e88f8b919a526a095a4307f0823db3e49b08
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SHA512
99dff00a65ed5c37d6b86e949618c2bf4aa00b076f44befa21d04301c3c1fa3653278001b28571d5d0677b92804fbb78ca4930571ba82da24757b3639c7d036c
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTG:ZRpAyazIliazTG
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 2068 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:
2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_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:
2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2612 2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe Token: SeDebugPrivilege 2068 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exedescription pid process target process PID 2612 wrote to memory of 2068 2612 2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe CTS.exe PID 2612 wrote to memory of 2068 2612 2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe CTS.exe PID 2612 wrote to memory of 2068 2612 2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe CTS.exe PID 2612 wrote to memory of 2068 2612 2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2612 -
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:2068
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD54a5f457ba16780de89577d2dbb5ce302
SHA168157635bf260ce447c39d598b379d34abc677d7
SHA25698bc8f0e6af9d12b95e0b19305b4b43813f7fb6310d831586959c6a2fccdceb7
SHA512621ca17e562d49a2c5a2d7a95c737327064ab522c960890cae0fff906a4337f8ea5d8bdfeee4ec02e5ba1a79e8c523e53ccc6901a40ca0dbcaa1f6bcb7b9719b
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432