Analysis
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max time kernel
118s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
03-06-2024 09:31
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exe
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Size
74KB
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MD5
364e0b86d674ba928843dadc91e7dad5
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SHA1
f6be43700984bab074063a4d8cabac8307777d0f
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SHA256
2d5736e6f39945d5f06223a6c75e9103f6ede7702890bf2496e5c8fa982350a7
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SHA512
494ec796e6bd05a7f0a9b4973abebbe5cbd566b60810fdd22fd3a763f8610707d6259ac65c4a3fa21dbc13c24f2857f89b4b2529d0a49edb6eb851e8b885d195
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTmmTb:ZhpAyazIlyazTVb
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 1900 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:
2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-03_364e0b86d674ba928843dadc91e7dad5_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:
2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 948 2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exe Token: SeDebugPrivilege 1900 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exedescription pid process target process PID 948 wrote to memory of 1900 948 2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exe CTS.exe PID 948 wrote to memory of 1900 948 2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exe CTS.exe PID 948 wrote to memory of 1900 948 2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exe CTS.exe PID 948 wrote to memory of 1900 948 2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:948 -
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:1900
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
74KB
MD5f8660f03ea5bce6bbbac04fe7133ab6e
SHA12b771621bad315216d1c44fc834b555a650ebcc0
SHA256768b6b7801693ff0dac25eaf673b1e536c328951e552089dd0ee0eeb10579ae3
SHA5120b644c186fa45c45706b28016ca75fc92562efdce010d9dc7450e8743bc82360a48de115c59132ea1e023d044c41e0484032f98292ef5ff34d97b17119c5ef9b
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25