Analysis
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max time kernel
93s -
max time network
99s -
platform
windows10-2004_x64 -
resource
win10v2004-20240611-en -
resource tags
arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system -
submitted
13-06-2024 03:45
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe
Resource
win10v2004-20240611-en
General
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Target
2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe
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Size
71KB
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MD5
9a9168e5de25fc2ff66702805cb63db4
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SHA1
a1b6b0fd7f88f08fd2c73c00dedda115d726e8f9
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SHA256
e101f7550db0f220224e846a6a14da87450d2e401af676dc98c45aaf1cb22404
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SHA512
13f001d00f44bcca8f74b06d9ce0fdc5889453f4720d3ab2c3a556fc5ee9877a15d2fee48890b66d8fdf7fa074f1bf7c227c6850566f7621f8b0105e142d83ab
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTO:ZhpAyazIlyazTO
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 220 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:
2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-13_9a9168e5de25fc2ff66702805cb63db4_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:
2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 3000 2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe Token: SeDebugPrivilege 220 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exedescription pid process target process PID 3000 wrote to memory of 220 3000 2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe CTS.exe PID 3000 wrote to memory of 220 3000 2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe CTS.exe PID 3000 wrote to memory of 220 3000 2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3000 -
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:220
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
392KB
MD5588378ecff439c4526c7e4c52c08ef9a
SHA17c07db303e1b9a752f89b4d5d66ee199ddc27b41
SHA2561433f659bae2a21a46f4c15c72d38c5158668ef90e838eabe01545d36edbfc11
SHA51295d58898236bb3803766762c246f160a7a81703f7a30c661a29a10a7a2f5127c6da8393f0eda964ba82527dc19d6413535f515091ee5717b200b9f06247cfd59
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Filesize
71KB
MD5b675ec69f7f2680f089b5322df4af297
SHA114966fce605fb22d9e335066be00791f8ac7fb3c
SHA256492897401b2144711f7f6539e3165acde52912029c51520bb243c21274a4617d
SHA51216284705a8d6d33232c804a3290fbde565b89044d5e56d00ed165ae22352d304d3228871e263d6b91e5a0aac226f57cf3da794ebf7dfcf218a6a9e21326ea3ed
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25