Analysis
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max time kernel
120s -
max time network
99s -
platform
windows10-2004_x64 -
resource
win10v2004-20240611-en -
resource tags
arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system -
submitted
12-06-2024 18:03
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe
Resource
win10v2004-20240611-en
General
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Target
2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe
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Size
135KB
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MD5
a025e29726722d69fea098d6f481bb85
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SHA1
b725653b4ecaf4abdedf430d803ab358267858df
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SHA256
3180ad517578b8327517e020661dd02304e534181496344dedbca86f4290e180
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SHA512
de99f4485a5bd18e0665e278515a4887705783312b2a9e5c8300945c9d5b0e0df3d725aabe05636f5021a644242abc6dbe8df6541d440d4c6da0027fa05a3d72
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SSDEEP
3072:ZhpAyazIlyazTP+92PXRyWLxO6I1UsvPGVA:hZMazj+0JLxOX1KW
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
JkfkgHiRPkUL63l.exeCTS.exepid Process 2196 JkfkgHiRPkUL63l.exe 744 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_a025e29726722d69fea098d6f481bb85_bkransomware.exeCTS.exedescription ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-12_a025e29726722d69fea098d6f481bb85_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_a025e29726722d69fea098d6f481bb85_bkransomware.exeCTS.exedescription ioc Process File created C:\Windows\CTS.exe 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exeCTS.exedescription pid Process Token: SeDebugPrivilege 1796 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe Token: SeDebugPrivilege 744 CTS.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exedescription pid Process procid_target PID 1796 wrote to memory of 2196 1796 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe 81 PID 1796 wrote to memory of 2196 1796 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe 81 PID 1796 wrote to memory of 2196 1796 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe 81 PID 1796 wrote to memory of 744 1796 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe 82 PID 1796 wrote to memory of 744 1796 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe 82 PID 1796 wrote to memory of 744 1796 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1796 -
C:\Users\Admin\AppData\Local\Temp\JkfkgHiRPkUL63l.exeC:\Users\Admin\AppData\Local\Temp\JkfkgHiRPkUL63l.exe2⤵
- Executes dropped EXE
PID:2196
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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
PID:744
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
392KB
MD56c6a5a95342dfc8a526e61b63ec53d08
SHA1eabd99474e7191133366827b2cf6539b581f3734
SHA25645e826c28fc9888c033b18f7d373fda0d5a8b073a605b6ea3f7f2e7e5854019e
SHA512d11e39916204c1579b59d4f13ca57ef75cc038afafb482304774e2019267b9f37504cd3ee8abc0a0d84bb7bd850097fa808c587ae656a57fbf419552f4eb18b9
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Filesize
64KB
MD5e97c622b03fb2a2598bf019fbbe29f2c
SHA132698bd1d3a0ff6cf441770d1b2b816285068d19
SHA2565c1af46c7300e87a73dacf6cf41ce397e3f05df6bd9c7e227b4ac59f85769160
SHA512db70c62fb35a8e5b005f13b57c1ebbf6c465f6ff0524422294c43e27fb4aa79379dc1e300ad11dc2354405c43b192ae06b91c0f525a1f2617e4d14673651a87d
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25