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Analysis
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max time kernel
117s -
max time network
117s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
05/05/2024, 15:35
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe
Resource
win10v2004-20240419-en
General
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Target
2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe
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Size
71KB
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MD5
8ac34719cb003de2defb7e044fc097e0
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SHA1
beded5e6f4b094fa778f01e3429645f0d1aa236c
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SHA256
54a4ea1994f12418819fe0fb38c6e63065df677ae34caca945153de5a2b3a594
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SHA512
63359b6df19b39ea059dc2ddbbb769d12b37cc3240f597f92e703baa6d9f60bf59f3f5d425385ef7efeb5e31cf869ac9f60385cbd5842c36eaec2b3c34d3dd2b
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTE:ZRpAyazIliazTE
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 2740 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
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-05_8ac34719cb003de2defb7e044fc097e0_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
description ioc Process File created C:\Windows\CTS.exe CTS.exe File created C:\Windows\CTS.exe 2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1044 2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe Token: SeDebugPrivilege 2740 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1044 wrote to memory of 2740 1044 2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe 28 PID 1044 wrote to memory of 2740 1044 2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe 28 PID 1044 wrote to memory of 2740 1044 2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe 28 PID 1044 wrote to memory of 2740 1044 2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1044 -
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:2740
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD518b908d637155b00a56d01173a595812
SHA19a57fe8d62177797c069d1fcf5964efe6dd334dc
SHA2561a0295e87a7db61163bb73a90068368614b9a1b874fe3120fca2e8dd37f9ef0c
SHA512a0085b3d8f30cd9053bc9cbd245ad2b14aac089536afb624e3d4a5cbe4afc319005f9a05b69c65cc7832b38973c0831063fed97da13e70c76e457980695131cc
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432