Analysis
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max time kernel
92s -
max time network
97s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
03-06-2024 09:30
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exe
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Size
71KB
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MD5
3213c6175c2f1919a41d773c7d62d395
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SHA1
f89f3488d223f1ac843900669ea39f5faee55ad0
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SHA256
3ce3210ade8bb1bc8281b764344310669f6582c14900970aa5d97876893fd08e
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SHA512
678e84271b9b95101862ebda3d2fa7da8b4c9b71a3e01ca892bdb9956751c9e2c9859e84885e36b0021874924881a7c8b3e20aec3bc212e44a70c24320dc0a07
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT7:ZRpAyazIliazT7
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 5096 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:
2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-03_3213c6175c2f1919a41d773c7d62d395_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:
2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 4844 2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exe Token: SeDebugPrivilege 5096 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exedescription pid process target process PID 4844 wrote to memory of 5096 4844 2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exe CTS.exe PID 4844 wrote to memory of 5096 4844 2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exe CTS.exe PID 4844 wrote to memory of 5096 4844 2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4844 -
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:5096
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
392KB
MD5a04cb62372e364d86da86176b1f898bc
SHA1b66444e8c72356a18a9061bfc3c9520aaec7a3ab
SHA256fb2cfb0c8c88a4afeed0864f58e04b1ca74635e3970c146c426f7e321cac3c9a
SHA512fde929239d6a53d83154c0c15b88ceac8cb60879ec0638171ab16d718e8bcb646f53e26d8b2561346ebec82d00cdf54eb7a9e3ed2e4dbcc69333839cf906436f
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Filesize
71KB
MD5397a82e14c3fff2b778685c4ec57aa5e
SHA1b0c1e81175d1da4ecf73a98ddb7c2a365d4ac28c
SHA2569da976d102d94e74ffbba2a18f0a25c044b0bac86e234a8f66e6eefa36f5ba5b
SHA512c75bf5728bf6f95e55dd0c104369b60b9196935cb7506a8ece3c997efcdf7a32a3355e3cd645b9339e2c063d0d96b80eb6c0768b8122741174bdab2d4d71c9fb
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432