Analysis
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max time kernel
122s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240220-en -
resource tags
arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system -
submitted
28-04-2024 10:14
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe
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Size
71KB
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MD5
bb39e9a2a04d336d456b8476cd3da84c
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SHA1
019bb5403f180825773ca2aa4d9f41285eedc428
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SHA256
e3c4d0909a30d5d34fc2ae49d3871b9f81ea43ecfdc4296c42fdce275e4918d6
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SHA512
f380699033e550b8ac7ff29d5480de24380e93bacceeb91f783ae99863bf1e9eb29d866ac556e3f8a0b5561f468d673677b45c7c708fa03289767fa50783d8e2
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTt3t:ZhpAyazIlyazTL
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 2760 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.exe2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_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" 2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe -
Drops file in Windows directory 2 IoCs
Processes:
2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 3064 2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe Token: SeDebugPrivilege 2760 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exedescription pid process target process PID 3064 wrote to memory of 2760 3064 2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe CTS.exe PID 3064 wrote to memory of 2760 3064 2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe CTS.exe PID 3064 wrote to memory of 2760 3064 2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe CTS.exe PID 3064 wrote to memory of 2760 3064 2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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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
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\tztfUbhM0DGPSPP.exeFilesize
71KB
MD527d263c7b014d76f42b21037824495be
SHA113b73afd5348db94006bf9cc9111383d36bc481c
SHA2566fbb854050d97dc41727fe12cc19311fa4795e83f9b560a60237b160ceacd99c
SHA512eb89b5c92a5db1f4f3bc1ddab3b5566962bc09879d7c55643d29b140665fe22967cddb379ffc9bda327e95fbf4c7db723587690bd12ec55ccd9e68d0c28a894c
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C:\Windows\CTS.exeFilesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25