Analysis
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max time kernel
121s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system -
submitted
02/06/2024, 15:25
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe
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Size
74KB
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MD5
acedaea97b6c0879f4dbdd9d2ed0bd75
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SHA1
12023674604e7803918fefa2cd0f3f77d01da876
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SHA256
a9f7c4d2716c64b45190b04b9a36861a6122b136f973079f4d4a6d72f5761b18
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SHA512
f7aff79ed71e785a300f6a2045a221b4f1cc4db13b636e8fe21f4dbdb8963f312e0935013f6b0199467c4d7d065917cf60a71a84ea977080e3c29bf0c7a47cb0
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTSZEar:ZhpAyazIlyazTE
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 2448 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" 2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_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 2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2260 2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe Token: SeDebugPrivilege 2448 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2260 wrote to memory of 2448 2260 2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe 28 PID 2260 wrote to memory of 2448 2260 2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe 28 PID 2260 wrote to memory of 2448 2260 2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe 28 PID 2260 wrote to memory of 2448 2260 2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2260 -
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:2448
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
74KB
MD59d350bc5dfdc3ade3a787754cafec2c5
SHA1501ea7deed824b41b6674d6ce26563338ad69898
SHA256dd2e9a5b01e848b3ba43115b6f034a265ac95b79623a81a89e6bc87f430bf9bd
SHA5127010523ee729f8693cf9285f8cea0b3cb5ad3a47fb649d722b9f8a3033a34313004f8afd4cba620656fa68b4e21531dc5b73f1041d3b7be6c34b26ece9c5b8df
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25