Analysis
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max time kernel
149s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
04-06-2024 01:40
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe
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Size
71KB
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MD5
ddabb10468039a14619a357bd42f494d
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SHA1
74e6ff7c661b4f4e5743d14e14caae6b73a93b87
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SHA256
9de7cac8c186c098f889262f30f87b76eb907a2545fe17fb3e8c8733b43b1f87
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SHA512
683468ecd9743b8dbf2374d2c453f27d69cdd4bbb2692f317afa4af6638991e287dce2122d00bb49a41137179df5cf85d9a4801d217613c8c42522977224b715
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTE:ZhpAyazIlyazTE
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid Process 4832 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:
2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exeCTS.exedescription ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-04_ddabb10468039a14619a357bd42f494d_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:
2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exeCTS.exedescription ioc Process File created C:\Windows\CTS.exe 2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exeCTS.exedescription pid Process Token: SeDebugPrivilege 3440 2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe Token: SeDebugPrivilege 4832 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exedescription pid Process procid_target PID 3440 wrote to memory of 4832 3440 2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe 85 PID 3440 wrote to memory of 4832 3440 2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe 85 PID 3440 wrote to memory of 4832 3440 2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3440 -
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:4832
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
394KB
MD5d36aaf51efccb154694b4c4d387ecd40
SHA1a1541a5356d150b70455c154efcdc2575d657175
SHA2569f7c7a5d91520aff68572d2fa5fba1dee56bb382dab784cacb5ceb2dc4d4c603
SHA5121b008512b0ff5298005a3c74d65feba63b7c3bd5243c317536cbca879253f3456170555317800fbd7bd709e83c9e2d824af15d770da178af06a334f58f8d16a2
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Filesize
71KB
MD518bc6c19a0ee167f79ec2b48ed52be63
SHA14ba6ac9aad451d63d0632692f3e13e1eb17f2b73
SHA256c39204ad20d101b8f7e75c824bbc679693614e6297e82b09a18fdf4a05fbca96
SHA512247d8b6f27e6c97954dc2eabe156a3a6ddd6a8ff0dab3677dd792e7c55ff84fb94a4580524ab67d50c01ede8502a9f61b8ea7de4e935772a9d7c58d2c5cf46fa
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25