Analysis
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max time kernel
121s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240419-en -
resource tags
arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system -
submitted
13-06-2024 04:25
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe
Resource
win10v2004-20240611-en
General
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Target
2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe
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Size
71KB
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MD5
3a5b1baa996b35b243dd161b3e4b292a
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SHA1
998fc1e4f533139fa5a4205305c99b58e2aaab15
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SHA256
b732cd56ad5917c6e082eb84073c11575c1b4db0560d5257a204112d081c7bae
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SHA512
6148ae456f6faa526e76ff00ff61514ee831e060890fc3a70dd59be23ddbe4f02204dc2e0cc30e2d993208e0a870b9a1431c5bc836ad30a3d0a8019d9ff1a429
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTC:ZhpAyazIlyazTC
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 1928 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:
CTS.exe2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" CTS.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe -
Drops file in Windows directory 2 IoCs
Processes:
CTS.exe2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exedescription ioc process File created C:\Windows\CTS.exe CTS.exe File created C:\Windows\CTS.exe 2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 1860 2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe Token: SeDebugPrivilege 1928 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exedescription pid process target process PID 1860 wrote to memory of 1928 1860 2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe CTS.exe PID 1860 wrote to memory of 1928 1860 2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe CTS.exe PID 1860 wrote to memory of 1928 1860 2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe CTS.exe PID 1860 wrote to memory of 1928 1860 2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1860 -
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:1928
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5cec80b3a0758cda009f483214caae369
SHA185191d763632804b7ac60d712614ea3aea7a4b5a
SHA256123dece3768ea57b3b481bdaf46130146fa768d0f4863b5b90cc000923d728d4
SHA5122e3795a9d4610b9655534eb821415716d3331e40dea39b92188a69327ba4a477e5d7c9e051495a8f8c5a36fca5448701ceeda3b5658610858d6c0ce1292b7e45
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25