Analysis
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max time kernel
118s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
01-06-2024 07:44
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe
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Size
214KB
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MD5
03687dfe73e5dcbe025c25b6b24a6879
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SHA1
005087f70523a539ce88b63371541532274df440
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SHA256
6bc9e25575d9913b16aa1e3d289325daa809d7d1babb4923b34ad44f4de00775
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SHA512
7a859848f238bb5f21ebd905f2548240da2144e8f92dcd8a3d551935845ba66561eae67445c045e4d0a5b59026c451cff0fd7d11cd1d4c9f21abc57c2c778c33
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SSDEEP
6144:xZ8azGvd0q5vq1TUxbYv1V7HVmVGQXArma3x+:xC0WKq5v4oAz71mV5s3Q
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
03f3JmyMdQp2QY5.exeCTS.exepid Process 2016 03f3JmyMdQp2QY5.exe 2444 CTS.exe -
Loads dropped DLL 1 IoCs
Processes:
2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exepid Process 3044 2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_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
Processes:
2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exeCTS.exedescription ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_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:
2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exeCTS.exedescription ioc Process File created C:\Windows\CTS.exe 2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exeCTS.exedescription pid Process Token: SeDebugPrivilege 3044 2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe Token: SeDebugPrivilege 2444 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exedescription pid Process procid_target PID 3044 wrote to memory of 2016 3044 2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe 28 PID 3044 wrote to memory of 2016 3044 2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe 28 PID 3044 wrote to memory of 2016 3044 2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe 28 PID 3044 wrote to memory of 2016 3044 2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe 28 PID 3044 wrote to memory of 2444 3044 2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe 30 PID 3044 wrote to memory of 2444 3044 2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe 30 PID 3044 wrote to memory of 2444 3044 2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe 30 PID 3044 wrote to memory of 2444 3044 2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe 30
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_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:3044 -
C:\Users\Admin\AppData\Local\Temp\03f3JmyMdQp2QY5.exeC:\Users\Admin\AppData\Local\Temp\03f3JmyMdQp2QY5.exe2⤵
- Executes dropped EXE
PID:2016
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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:2444
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
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Filesize
143KB
MD52fdb371d45181dff59577110ba1064e2
SHA142a5833cb0ac90e38d734d1327bb3f7c7a6aa453
SHA25680d7ec8ce3913d81ea5d4f304b8609e56f0e49778c52af9279e742ea54f4a155
SHA51252982041ba9ca552b90b79b251501ec6c33c5251d09ca9969a1b179af2ec17aca6eb81db6e588e12751bcea04208e1da8d5a754a979dd98ceb3f50780aadea20