Analysis
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max time kernel
121s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240220-en -
resource tags
arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system -
submitted
04-06-2024 00:28
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe
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Size
71KB
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MD5
9d907de961e3f0f14fe3da905c77122c
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SHA1
4282c265d224adc4fad02171c0a34ff99872bfc8
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SHA256
9b72c3dc86282139d039f45ee6ce6ee546a7d9c209fb9ca4736c5b05774b3f3c
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SHA512
8d2614bea71007996af00fd0ae794d4cd86802e82278786b3c0bb4663986a6bb3639998d5a1d8d649480633c1f161272d26b11ce75b0011fdf2717ce8c0896a6
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTB:ZRpAyazIliazTB
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 3048 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.exe2024-06-04_9d907de961e3f0f14fe3da905c77122c_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" 2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe -
Drops file in Windows directory 2 IoCs
Processes:
2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 1940 2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe Token: SeDebugPrivilege 3048 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exedescription pid process target process PID 1940 wrote to memory of 3048 1940 2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe CTS.exe PID 1940 wrote to memory of 3048 1940 2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe CTS.exe PID 1940 wrote to memory of 3048 1940 2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe CTS.exe PID 1940 wrote to memory of 3048 1940 2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1940 -
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:3048
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD52650bf72fd6322776ee9bd69a0ed9a35
SHA1cb53d30abdc132f383cef19738d9ed0729f91379
SHA256df49a7093056889f531868a3b6af55fa6794462dabbe3b73165619f733e0f6fd
SHA512af003ea421bdac0e811b9222a5356b1ecab3775b2f76407ec3f7fbe1065087134810ab7eb09188d0a998264fe1f489cb83ffbec021ee4ed885d47c128f96e9e3
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432