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Analysis
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max time kernel
118s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20240220-en -
resource tags
arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system -
submitted
04/05/2024, 02:28
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-04_793c19d1b1924506d07f20a7f5221d9b_bkransomware.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-05-04_793c19d1b1924506d07f20a7f5221d9b_bkransomware.exe
Resource
win10v2004-20240419-en
General
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Target
2024-05-04_793c19d1b1924506d07f20a7f5221d9b_bkransomware.exe
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Size
71KB
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MD5
793c19d1b1924506d07f20a7f5221d9b
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SHA1
a40b74ddac18599e3fbe01abee0d4439e24c6dd4
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SHA256
9dba025eae42a0332374d1f2e6c28dd3db6140ee2e30eacb1f45c1e6952d6b5e
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SHA512
2d934cc17375d4da37ed4ce11e69420b0eaf34598ce20cb879836468f736eae392a6ec9b112a3bbb3a6c8594e85484cc8c2958a8306528912d1f3f84f5260b2e
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTu:ZhpAyazIlyazTu
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 2632 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
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-04_793c19d1b1924506d07f20a7f5221d9b_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
description ioc Process File created C:\Windows\CTS.exe 2024-05-04_793c19d1b1924506d07f20a7f5221d9b_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2924 2024-05-04_793c19d1b1924506d07f20a7f5221d9b_bkransomware.exe Token: SeDebugPrivilege 2632 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2924 wrote to memory of 2632 2924 2024-05-04_793c19d1b1924506d07f20a7f5221d9b_bkransomware.exe 28 PID 2924 wrote to memory of 2632 2924 2024-05-04_793c19d1b1924506d07f20a7f5221d9b_bkransomware.exe 28 PID 2924 wrote to memory of 2632 2924 2024-05-04_793c19d1b1924506d07f20a7f5221d9b_bkransomware.exe 28 PID 2924 wrote to memory of 2632 2924 2024-05-04_793c19d1b1924506d07f20a7f5221d9b_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-04_793c19d1b1924506d07f20a7f5221d9b_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-04_793c19d1b1924506d07f20a7f5221d9b_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2924 -
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:2632
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5d79cb013e7d6f96b9fef73a2ad220fed
SHA1b80c8061c6a2475c5a38e957b63aaddc660293df
SHA256295f01e163276c7555b60e974ca139fd391d9655830ffe9b3d2f075f1fac5b55
SHA5121825417cde678771cd78c2ba1c3eeffc7a2a3d3ad29a9a1716850cbea27f69b180b94921834de27794e86988075c8c967780ac4f4f1b9d71c340816b0be65d2b
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25