Analysis
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max time kernel
121s -
max time network
126s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
07-06-2024 22:43
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe
Resource
win10v2004-20240226-en
General
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Target
2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe
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Size
135KB
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MD5
77d75393a71b68e6d4315225d2776c12
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SHA1
88124a6e0dade8408d687b9bcac066275c8aea8e
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SHA256
a697fa27a6a63f248d12c4716bf5feaf678c09aeea695bd8e8a0fd8829e94287
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SHA512
22dd2c6a7fe273abe440d2463d3b04e28e79d8ce1d7d9b266c6f56ea075065369f6bf5b2941a360dee313db55bded95386850e806193dc4c813b60848adac16f
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SSDEEP
3072:ZRpAyazIliazTJM8yKI7swt99g0kFZeAmkD5zXv:xZ8azFdyLTt9UFcAmkZ
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
pid Process 2168 6rQ7trbrQFFiTry.exe 2472 CTS.exe -
Loads dropped DLL 2 IoCs
pid Process 2184 2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe 2184 2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.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" 2024-06-07_77d75393a71b68e6d4315225d2776c12_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 2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2184 2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe Token: SeDebugPrivilege 2472 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 2184 wrote to memory of 2168 2184 2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe 28 PID 2184 wrote to memory of 2168 2184 2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe 28 PID 2184 wrote to memory of 2168 2184 2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe 28 PID 2184 wrote to memory of 2168 2184 2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe 28 PID 2184 wrote to memory of 2472 2184 2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe 30 PID 2184 wrote to memory of 2472 2184 2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe 30 PID 2184 wrote to memory of 2472 2184 2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe 30 PID 2184 wrote to memory of 2472 2184 2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe 30
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe"1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2184 -
C:\Users\Admin\AppData\Local\Temp\6rQ7trbrQFFiTry.exeC:\Users\Admin\AppData\Local\Temp\6rQ7trbrQFFiTry.exe2⤵
- Executes dropped EXE
PID:2168
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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:2472
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
135KB
MD552d5d737b83f051d88f2a8935d36961c
SHA1c22fc71cb7c3cb19a6c49787b6866716d8e3d53f
SHA2561d23aec5bd8b5184f54017abb0f29099b864b1ff434409eda6a7f78a0a8a9d0b
SHA512e5a04603fe3a5cad6ae2708e352e804fe247b848d4d11fb829dd020f50f9ef7bc128425b45772d8f4d4d619905cee6f6708de1851e9834a889e3330335e4e9d8
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Filesize
64KB
MD5a32a382b8a5a906e03a83b4f3e5b7a9b
SHA111e2bdd0798761f93cce363329996af6c17ed796
SHA25675f12ea2f30d9c0d872dade345f30f562e6d93847b6a509ba53beec6d0b2c346
SHA512ec87dd957be21b135212454646dcabdd7ef9442cf714e2c1f6b42b81f0c3fa3b1875bde9a8b538e8a0aa2190225649c29e9ed0f25176e7659e55e422dd4efe4c
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432