Analysis
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max time kernel
120s -
max time network
125s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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 548 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 2180 2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exe Token: SeDebugPrivilege 548 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exedescription pid process target process PID 2180 wrote to memory of 548 2180 2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exe CTS.exe PID 2180 wrote to memory of 548 2180 2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exe CTS.exe PID 2180 wrote to memory of 548 2180 2024-06-03_3213c6175c2f1919a41d773c7d62d395_bkransomware.exe CTS.exe PID 2180 wrote to memory of 548 2180 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:2180 -
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:548
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD55b9e752f11a2f0e7b80c96313650ddad
SHA141c5364f97b32ceff0becc49702a56b60bf8645a
SHA256fd428d85e21799bfcd24cfba1449866e971e6bff040d2907b21dba8bcb37f5c4
SHA51219495cd2f8b23616d15822f26582849d2b12919d1cceac14c1c3513850a25a3a0648c7096728f03978d00750438034b5e6e4eb58e9a4adfd3b68fffc4c34e618
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432