Analysis
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max time kernel
121s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
12-06-2024 14:41
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe
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Size
71KB
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MD5
679c3344329b0d32d28bd1c392772082
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SHA1
e321ef63f793d6c76378c73bf9fc43a86c57fff4
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SHA256
cea8457cf83420c20d47290e0527895f0c572d68527ad2e0011e1e64827e40ba
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SHA512
ed787a9d5b152b8b29671c215b71390b004fdec74d137058410ffa4051b9a32679447b75d89bce901f0292d810cadf82d9d9f63c2f42fba3502d3709576b3acb
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTo:ZhpAyazIlyazTo
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid Process 2960 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:
2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exeCTS.exedescription ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-12_679c3344329b0d32d28bd1c392772082_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:
2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exeCTS.exedescription ioc Process File created C:\Windows\CTS.exe 2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exeCTS.exedescription pid Process Token: SeDebugPrivilege 2188 2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe Token: SeDebugPrivilege 2960 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exedescription pid Process procid_target PID 2188 wrote to memory of 2960 2188 2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe 28 PID 2188 wrote to memory of 2960 2188 2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe 28 PID 2188 wrote to memory of 2960 2188 2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe 28 PID 2188 wrote to memory of 2960 2188 2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2188 -
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:2960
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5a28180b3da6b4878cfceff21f5e1484b
SHA1deb4642be300e0f665fba73c86f49f9f896deedc
SHA2562d3d47edd10febb1d7df2e8b858eb59f11e9c5d30f444df64cae7f8d860d88ee
SHA5120f885c1461ddf1d86037f5c2cb7be48ec9e72fce49ab1c9883e8b29dc0c7994e72e88d4f75b20a054f154fbaf1e180675e62f372b67c1f532bc7a32b12d5b5bf
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25