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Analysis
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max time kernel
121s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
04/06/2024, 17:26
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-04_44976294bb1b928a214c8e4b8e6decfe_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-04_44976294bb1b928a214c8e4b8e6decfe_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-04_44976294bb1b928a214c8e4b8e6decfe_bkransomware.exe
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Size
71KB
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MD5
44976294bb1b928a214c8e4b8e6decfe
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SHA1
eed0563267e21fe98c0a2d3700acc7c3e3bb162b
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SHA256
c633fecb35c492dc22642a00d4aab8a003be084197cbb7e669613dc5d15df489
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SHA512
bb468ba2e0b3ce574fb4997d860b33c495aa61152bd03bd240a6c0354d83a7ab3094ab0923180538414e47f44bd75d56a8e38cb25d72c0bda37eae6cd4810863
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTa:ZRpAyazIliazTa
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 2076 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" CTS.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-04_44976294bb1b928a214c8e4b8e6decfe_bkransomware.exe -
Drops file in Windows directory 2 IoCs
description ioc Process File created C:\Windows\CTS.exe 2024-06-04_44976294bb1b928a214c8e4b8e6decfe_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2236 2024-06-04_44976294bb1b928a214c8e4b8e6decfe_bkransomware.exe Token: SeDebugPrivilege 2076 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2236 wrote to memory of 2076 2236 2024-06-04_44976294bb1b928a214c8e4b8e6decfe_bkransomware.exe 28 PID 2236 wrote to memory of 2076 2236 2024-06-04_44976294bb1b928a214c8e4b8e6decfe_bkransomware.exe 28 PID 2236 wrote to memory of 2076 2236 2024-06-04_44976294bb1b928a214c8e4b8e6decfe_bkransomware.exe 28 PID 2236 wrote to memory of 2076 2236 2024-06-04_44976294bb1b928a214c8e4b8e6decfe_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-04_44976294bb1b928a214c8e4b8e6decfe_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-04_44976294bb1b928a214c8e4b8e6decfe_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2236 -
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:2076
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5a566eee162cb986ba9ef741a987ffeb7
SHA16abec7a1967990e4f4f5915c92f6b04a2a6eb146
SHA2561d5b44f3e43dcce12e3ffdc395fcfd71e805620a2c0bb39de0c60c51af319cb8
SHA512aa341fe13c7774caa5f74b36e739d293d485deb8f4a8133d844266504f5e8b9b9c8c2cfcc7ed24021bc936421403f371eac61770c9f84b849568f7fc633ce930
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432