Analysis
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max time kernel
119s -
max time network
124s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
03-06-2024 09:26
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe
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Size
76KB
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MD5
02f6b237cd741d9110ee2cbfc1a2714f
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SHA1
b84541238cede116e5a67fe9b6235c48bacb29b1
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SHA256
b0c12ac6700ed13dd70a09c67aad3559d3020c330fc71c9f3c53ecc9afdea98a
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SHA512
22bd1e1d2e588193d773f7eb279b31de09b4337f1350f0f00e708506fe1a29a7b079e8be2b30fa9c3d87b897b09430e494a6796df92d49bea8251c4ade2030f4
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTT:ZRpAyazIliazTT
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 2052 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_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_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:
CTS.exe2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exedescription ioc process File created C:\Windows\CTS.exe CTS.exe File created C:\Windows\CTS.exe 2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2804 2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe Token: SeDebugPrivilege 2052 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exedescription pid process target process PID 2804 wrote to memory of 2052 2804 2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe CTS.exe PID 2804 wrote to memory of 2052 2804 2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe CTS.exe PID 2804 wrote to memory of 2052 2804 2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe CTS.exe PID 2804 wrote to memory of 2052 2804 2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2804 -
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:2052
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
76KB
MD5bb6d497253ba049a62c2e816afae6b00
SHA141bc4dcd476a0499314da3e02b93355b324e32c9
SHA256ba6732bf07f8b9a958258fe0d73b15aea9c0ddfd09ba0a3c0506bff0fee0cccd
SHA512a8db70015d063dc5688dd7c104f50820f25c5cb4f2a8acda30e66f52c1c7a936b0e9d6a938a7b553c7b33640eb9e091f4238b0659e4d432d6d3e48875a3560df
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432