Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
28-04-2024 04:28
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe
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Size
235KB
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MD5
30c1860f9f8f87f9a716edb7613f5df0
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SHA1
3743441324963c979a5e5df778f59e2a2f90b52f
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SHA256
9a542017148924bcaf18f0033a66544a4ffc6e75020f09d878c3b9dee216c607
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SHA512
ac973eec26605f053a62d5393062bdf76c6ccee2812de5b1dc94c101181bf4c5b1c264698f59bbccae0039ca930c98cd795c3449bfa3abcdb7070afd3992445c
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SSDEEP
6144:xZ8azD1D3zw478TuuCB0WjQB/MYhxzsPUbK:xC0Z3w47UumWQ7scbK
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 4568 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:
2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_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:
2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2968 2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe Token: SeDebugPrivilege 4568 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exedescription pid process target process PID 2968 wrote to memory of 4568 2968 2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe CTS.exe PID 2968 wrote to memory of 4568 2968 2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe CTS.exe PID 2968 wrote to memory of 4568 2968 2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2968 -
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:4568
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xmlFilesize
392KB
MD55612d40823b54b1a65c9fae0dc34425e
SHA132219a6048ea1f265c99e265b82e0d23e89d5d6d
SHA25642643cb05f018345d7fdfa5d4a1fe7b5f615cb12adb7b49bcaece347ff14cd09
SHA5121b9b9dfdf34f50decab19679dac61fbcd0278be108b83f2e9b645df31afdbe1e7abb542e75d26935334a006b50fd495f8c564e821cffd4db28af7e90036f6ca6
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C:\Users\Admin\AppData\Local\Temp\OuRYmUXUaDhdaT8.exeFilesize
235KB
MD5ea98e6ac6509971903fa2bfedee65557
SHA18fef2831663d94d9e87aeabfcbfa160eeab53146
SHA2565ed6e6321607b15ccd733f1c89a4dbc1167e47b522da587da208d5b0d9a38673
SHA5129340a564a853583eb9ab851bd31023812c95399fecbeb25ef76f3d4725aa9ac5df85b1d7e66be3322439901c123f97bc59d4b6010d1c6643c9e55dd32eed8537
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C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432