Analysis
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max time kernel
131s -
max time network
103s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
04-06-2024 00:24
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe
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Size
71KB
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MD5
5fff1872ff95d09e59f17f44020f88e7
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SHA1
721f3517a4826dd530d28e1ddcf718383ecb4197
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SHA256
24cf61fc1f05c71abba8bba768cd57e1923aa612c787c9b7b7525158473b1c25
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SHA512
d1fc066814e1c45572803141eeb385a16dd30b643a6bf139fcf221193c833d4b085a3c63e212d7e374de17c1c18a49cc01005b00e0218ec9dd6b3f641f7c0dc9
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTK:ZhpAyazIlyazTK
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 4136 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
Processes:
2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-04_5fff1872ff95d09e59f17f44020f88e7_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:
2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 848 2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe Token: SeDebugPrivilege 4136 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exedescription pid process target process PID 848 wrote to memory of 4136 848 2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe CTS.exe PID 848 wrote to memory of 4136 848 2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe CTS.exe PID 848 wrote to memory of 4136 848 2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:848 -
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:4136
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
392KB
MD5d60f11cfc6761bdc3db0b904ede8c3e2
SHA1e11b7e723cf63d2475131bfcbf46a177e0c4728c
SHA25633b6781e804a30216d6155b2c6cbfb0bc538cd14adc548e0e95ef4a178ce52ec
SHA5126c89a7c29b1d25f7f55d92af0e819365d153b74803c89c7cbba0248956a10e6da9c94b64b21215a8efb5dee3e7b953d1fb90a4cca66d3e5eaf85cf299cfb2965
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Filesize
71KB
MD5eda76a744b262248ac7bf5b070c949b8
SHA1d7b68794dc1c353919cad40f2138252ab3d81e53
SHA2569cec0460de8127b6b7e6c687b9bf3f53d61a6bb52e740f01e7e3c2c8998369eb
SHA512c2c893717fc5cd9d1c822e381ab9bf080506920b109f6e252d950ac07303de3107d671528d133ade7330db0bb90c75e99b08fb238a460d59d96b4b5e24640106
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25