Analysis
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max time kernel
121s -
max time network
125s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
02/06/2024, 01:04
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe
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Size
71KB
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MD5
578186df7b810fe5809213537aaea468
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SHA1
06cdbd529d612d24d336f984b0fcf5ae79061c18
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SHA256
7b911eda3edcb5cfc53b82f5aba8e50f87dc772728836424332c6c02ad3af6e7
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SHA512
9c3d10bc36e55137d9ee664d0ed0744ec3130c5d07d792ed913b2603744d605d257d5131fd9343a47292af39974780e0116457f4bee2330bf406fa760cff1461
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTLX:ZRpAyazIliazTLX
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 2192 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" 2024-06-02_578186df7b810fe5809213537aaea468_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 2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1732 2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe Token: SeDebugPrivilege 2192 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1732 wrote to memory of 2192 1732 2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe 28 PID 1732 wrote to memory of 2192 1732 2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe 28 PID 1732 wrote to memory of 2192 1732 2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe 28 PID 1732 wrote to memory of 2192 1732 2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1732 -
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:2192
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD587ce87d6839d7329e641695f41ef2b1e
SHA1198bab1842a2ed0f8152126ee9fd1d44d3b73fbc
SHA25695ea9da33250d65c3adeb7b11346ce14354a6481a76f5971cb284c5653c73c81
SHA5122044eeae6add96663d6a1afa4130d8feca901c6a2267c33bcbb929a8db949e897817693ef9ca2cae0a009640bbfc087e68b3a39750cd5c5d8946a6aeb78a9338
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432