Analysis
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max time kernel
119s -
max time network
124s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
31/05/2024, 21:29
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe
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Size
135KB
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MD5
b83e98f0083e2369f05f169e399f7167
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SHA1
3bd25e38715f8cbbf33d55ab306d73c350972890
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SHA256
6096f8b923caa302fd2f4a3c03581b4fbe2bc4788270537e5cf0d735ec6174f9
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SHA512
6c594df53ed407566d145b04285cac60915d5fa899b9e5a8fedd9213d465f0dec8c404b6471b0be0343acfd5018eaf787697bf631ce5a3b0694e06def21d139a
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SSDEEP
3072:ZRpAyazIliazT9SUoCyp0aI8hj6zLu5WBUqXz1y8XWL:xZ8azxSUo/rJ6zq5WBUqXz1yH
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
pid Process 1448 hgyF5NfhNWr302B.exe 1536 CTS.exe -
Loads dropped DLL 2 IoCs
pid Process 2240 2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe 2240 2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.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" CTS.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe -
Drops file in Windows directory 2 IoCs
description ioc Process File created C:\Windows\CTS.exe 2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2240 2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe Token: SeDebugPrivilege 1536 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 2240 wrote to memory of 1448 2240 2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe 28 PID 2240 wrote to memory of 1448 2240 2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe 28 PID 2240 wrote to memory of 1448 2240 2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe 28 PID 2240 wrote to memory of 1448 2240 2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe 28 PID 2240 wrote to memory of 1536 2240 2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe 29 PID 2240 wrote to memory of 1536 2240 2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe 29 PID 2240 wrote to memory of 1536 2240 2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe 29 PID 2240 wrote to memory of 1536 2240 2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe 29
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe"1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2240 -
C:\Users\Admin\AppData\Local\Temp\hgyF5NfhNWr302B.exeC:\Users\Admin\AppData\Local\Temp\hgyF5NfhNWr302B.exe2⤵
- Executes dropped EXE
PID:1448
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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
PID:1536
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
135KB
MD5fbebed3ee61274a917e6ac1075ef283a
SHA16fa77a6404151d8f0d8aa98e898eb653df1829a6
SHA2563afce13a682c4c943d099167c22836ed9f57ecb95f5df0260c49a3968e8a02c2
SHA512cf4e6d23d15031d6e5a778435baf32ef7c46b2386540545940374698100b9503ca0907b7a7f58f62fb73a204865863d442889c3b641b8adbd594ded6311295f8
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Filesize
64KB
MD5e97c622b03fb2a2598bf019fbbe29f2c
SHA132698bd1d3a0ff6cf441770d1b2b816285068d19
SHA2565c1af46c7300e87a73dacf6cf41ce397e3f05df6bd9c7e227b4ac59f85769160
SHA512db70c62fb35a8e5b005f13b57c1ebbf6c465f6ff0524422294c43e27fb4aa79379dc1e300ad11dc2354405c43b192ae06b91c0f525a1f2617e4d14673651a87d
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432