Analysis
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max time kernel
122s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
24-05-2024 22:14
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe
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Size
71KB
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MD5
c9d2725ba3321b45c0cde2c13b6af927
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SHA1
75bfc4bf942d0f6a329041f96721df70721f11bf
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SHA256
2c88ab44e641076f484808752229729163e200b9137dd417a8d174075902e1f5
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SHA512
f542d7aa66aaaa1e24352448bcb4e5b363f4ba3c7e46d5d6eb40fd96696e03556763336de10bf193cae60beddef1c0f347c3f70a910ee47b40e243522d7597c3
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTcE:ZRpAyazIliazTL
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 1708 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:
2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_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:
2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 3048 2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe Token: SeDebugPrivilege 1708 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exedescription pid process target process PID 3048 wrote to memory of 1708 3048 2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe CTS.exe PID 3048 wrote to memory of 1708 3048 2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe CTS.exe PID 3048 wrote to memory of 1708 3048 2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe CTS.exe PID 3048 wrote to memory of 1708 3048 2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_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\3Y2Q6mF8nQlRS0T.exeFilesize
71KB
MD5d915d5b000c3bbb918dfc4eb28978f5f
SHA178776c3e24961d821921c9b22dd6d0494a23dff9
SHA25689a40ebc5af83d3598ade701984de89d42dc0fa2a70ffb255eb75b6af8c0f7e2
SHA5129edeb62503e0d022b433ccab0c83e420150149343b7225530891e32ec5ee08a4bd7d09ab88d0732ee57db3143d5c9e745531f0a7695d9dda574d6c60c9139dbd
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C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432