Analysis
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max time kernel
129s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-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 3688 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 968 2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe Token: SeDebugPrivilege 3688 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 968 wrote to memory of 3688 968 2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe 83 PID 968 wrote to memory of 3688 968 2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe 83 PID 968 wrote to memory of 3688 968 2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe 83
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:968 -
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:3688
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
395KB
MD561dfdc4e999808f8e58a5b68c20f5c63
SHA15dab229d7878e2dfa43073ce61cd6c73d8250877
SHA2569fb6144c404888a795685f68b3f8ceff1feccec67516e711e3590e9719c3cfd9
SHA512e9a3b2525bc6a74198189d7d0ddbdb3e9dcb500623794f8af49b72bfc127b47fac8b1a89997e31e1ead3f96b30162983d3d9ccc54a1eac0ebe74fb020476fc08
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Filesize
74KB
MD5a8a35f0759bb26a32b8ebeaf36b7f36b
SHA10b3be30a844a009c8f4ee46470b92cc84c72452e
SHA256ae1521458e125778a35f8ffd4d14a76146398cbc69ace2213e5b91e3fd600028
SHA512a871170e77864119ac44681a6d3c6d31d1be55b0d99d1f5e64b0d9d4739d723744033a7d96ee5147e3d50ed1e027337fd42032d4d4df12b2ec431f5c0d767672
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25