Analysis
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max time kernel
118s -
max time network
124s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
23-05-2024 02:50
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe
Resource
win10v2004-20240226-en
General
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Target
2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe
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Size
71KB
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MD5
ff137592acd8b7d67b31b5be1e7e30c3
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SHA1
7f48eca3784bc732ae096af820e992278070f84e
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SHA256
2b76b2fb077a6fbe227ab859739a211e71ef49caa15d6de5ce9693569565b7ec
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SHA512
b353ac108c79209344bfc310762d4116ce597f6f35ea2acf2ddb24f294ff0893509a1406f819878db6073ff9f6699ba753fd984fcbdfaecc34f0aac47f36ea39
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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 2276 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:
2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_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:
2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2292 2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe Token: SeDebugPrivilege 2276 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exedescription pid process target process PID 2292 wrote to memory of 2276 2292 2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe CTS.exe PID 2292 wrote to memory of 2276 2292 2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe CTS.exe PID 2292 wrote to memory of 2276 2292 2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe CTS.exe PID 2292 wrote to memory of 2276 2292 2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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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
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\kHHp3TdoZ9V7ckV.exeFilesize
71KB
MD54ccd868c4cf75d6a8c468281c3211805
SHA1ebfd1c57f281730753a5663c85725a415dd36a3a
SHA256d400c266a4cdc78eccae522bd28ec30161c61f947834062cf8ca6d0061668618
SHA512385e22ea7266fbff96ac1c67dc80fd595ef20004c503bfd0e17b378fd0c37279da5366bc73bc465ab0c15536b44ddfc393d5227bdd3e41d82b753a16807db4df
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C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432