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Analysis
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max time kernel
122s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
29/05/2024, 11:57
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe
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Size
71KB
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MD5
694389f5fe3d942957d3057cde4b3084
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SHA1
d3f5db605c9cfebd61b228cf5744fcc8f6cffd78
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SHA256
383e04cc53d06cdf31235cbce56c3b6f7ad8a3def771fd723ff9648db87d1adb
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SHA512
b41c11b453293b353d1b1113d62139b762bfc94520937ff58a130b88d1666e3adb61cdb5c4ecc893db430459c1c43f2a926147e4c3b1b921a6798f48d1706a46
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTS:ZhpAyazIlyazTS
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 3040 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" 2024-05-29_694389f5fe3d942957d3057cde4b3084_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 2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1736 2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe Token: SeDebugPrivilege 3040 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1736 wrote to memory of 3040 1736 2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe 28 PID 1736 wrote to memory of 3040 1736 2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe 28 PID 1736 wrote to memory of 3040 1736 2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe 28 PID 1736 wrote to memory of 3040 1736 2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1736 -
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:3040
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD50291077ca4d83a3a60b241b682cb3405
SHA1379d11ac2eda18b01a2ffc7c88f4aebd183fe217
SHA256873c2d61db0c9d786f1e6ae2b922601b904a65d6e5d545c043447af6c6db1fde
SHA512f98d1e9e1575930d855b6aa0ddb85f8b612ff44357e1231447427ad48346e287b9d27efa38613f3bf11a521590ea7b134ab8af0dc7dd8a62f9d567f1b89ca813
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25