Analysis
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max time kernel
51s -
max time network
52s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
11/06/2024, 18:00
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe
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Size
71KB
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MD5
88af66a07ddc2cdf772ce0806f196e0c
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SHA1
50f217752cfd0ee87d3ea2a812ec482224e74bde
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SHA256
877b7a3b09c2ac8be387e08e18e761a5ef77dfcf570ad8a742bb9f6b9cc5031e
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SHA512
388a8f2a9f6f82601f4f1e393953674acf40cb17662a9ad573cb05479ffba04a80e086e59a6df24eb474819967380714831e98f1ef67e32aae9de6203ab8c224
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTO:ZhpAyazIlyazTO
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 4444 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" 2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_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 2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1920 2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe Token: SeDebugPrivilege 4444 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 1920 wrote to memory of 4444 1920 2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe 81 PID 1920 wrote to memory of 4444 1920 2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe 81 PID 1920 wrote to memory of 4444 1920 2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1920 -
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:4444
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
394KB
MD58160a200297e7a390d8af933af0b9e33
SHA1e729a70544d3eaa2e4f91961fd60cd4267be21c0
SHA2569a9cd82e73cafc13b0101a6f043198fb0b809d92b0d34e54e3e29f89c621777a
SHA512443f0d876abf3d0b0159732934323fbfbc7a1c87042033c793b68a192580c2d716234ef87610843c5e76adca60058861234c3ec95259e959be6cc4b5174006fc
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Filesize
71KB
MD5c6982a4f5884324356f7d4260c5f3e8f
SHA19a1d0656f0ebe40caaeb2829ef9c3cae1e9415dd
SHA256728be988ee90bfc1ac3a03afa7807d1bbefa7a74dc4dc12be42bf60297c9e8b7
SHA512852d6845c45c76303a27d5f855bb7f8d3227a61c2d5cddd11ffc4ce029909c3e78baec0f0e2cb974f7789fb5ce43b69be082925958f672726417cff5716e9384
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25