Analysis
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max time kernel
121s -
max time network
121s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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:
95wFoU3S4siUM3X.exeCTS.exepid Process 2060 95wFoU3S4siUM3X.exe 2916 CTS.exe -
Loads dropped DLL 2 IoCs
Processes:
2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exepid Process 2288 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe 2288 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.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 2288 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe Token: SeDebugPrivilege 2916 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exedescription pid Process procid_target PID 2288 wrote to memory of 2060 2288 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe 28 PID 2288 wrote to memory of 2060 2288 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe 28 PID 2288 wrote to memory of 2060 2288 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe 28 PID 2288 wrote to memory of 2060 2288 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe 28 PID 2288 wrote to memory of 2916 2288 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe 29 PID 2288 wrote to memory of 2916 2288 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe 29 PID 2288 wrote to memory of 2916 2288 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe 29 PID 2288 wrote to memory of 2916 2288 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe 29
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⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2288 -
C:\Users\Admin\AppData\Local\Temp\95wFoU3S4siUM3X.exeC:\Users\Admin\AppData\Local\Temp\95wFoU3S4siUM3X.exe2⤵
- Executes dropped EXE
PID:2060
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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:2916
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
135KB
MD5a33fff9ccf410f818d2a7fdd67da07a6
SHA13d7225c264ae7e88b7932c2c37f40048e8be375b
SHA256f2af3ae853de1847178215797f8bc5d7c3a585bc39adaa883bc5d99bf3b7b9e0
SHA51276400809858c23867da039c443910c3e6b30e4275f0396fa4233366eb7d0cbd3b36e0e8f7ded9970a961ba6dfd26c7e8fa5879996a257390d66578b296b02f07
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Filesize
64KB
MD5e97c622b03fb2a2598bf019fbbe29f2c
SHA132698bd1d3a0ff6cf441770d1b2b816285068d19
SHA2565c1af46c7300e87a73dacf6cf41ce397e3f05df6bd9c7e227b4ac59f85769160
SHA512db70c62fb35a8e5b005f13b57c1ebbf6c465f6ff0524422294c43e27fb4aa79379dc1e300ad11dc2354405c43b192ae06b91c0f525a1f2617e4d14673651a87d
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25