Analysis
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max time kernel
122s -
max time network
124s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
11/06/2024, 17:53
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe
Resource
win10v2004-20240226-en
General
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Target
2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe
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Size
72KB
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MD5
56c46bfa121fca06c1325981e6c13195
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SHA1
edec16c5f91bc13d25e9ae17757992202568e246
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SHA256
bfd18f72aab900840cc667f96449dbd01158970223ec1c25df9965ba1ad0b59d
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SHA512
5c34bee7eab727ad5bf276219bfcd46b459fbdcc705374c473825de2a281083e228047fae3fec687cd64e558ac05d3a86cc88bdd7528aef10e4f129b8e6001e2
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT4dD:ZhpAyazIlyazT4dD
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 2100 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_56c46bfa121fca06c1325981e6c13195_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_56c46bfa121fca06c1325981e6c13195_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2956 2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe Token: SeDebugPrivilege 2100 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2956 wrote to memory of 2100 2956 2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe 28 PID 2956 wrote to memory of 2100 2956 2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe 28 PID 2956 wrote to memory of 2100 2956 2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe 28 PID 2956 wrote to memory of 2100 2956 2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2956 -
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:2100
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
72KB
MD5893912ff0c0fdf6b37227ef8fe1be850
SHA1354d5572c3e8061e54454546cc88174398324da1
SHA256cd047dd6083c20858fb99d04c4ef822617b3ce75f5abc34044d0b0c84a6bac61
SHA5120c73c1ed1b8c426482aba3dd4330bb1b402d07ddd8d93d93cb9eade9943c1d07ecd9b790dfb5b02f24523cdc160b70efa4f4a9d31c46305d156adab5e1586c26
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25