Analysis
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max time kernel
121s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20240220-en -
resource tags
arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system -
submitted
14/05/2024, 10:45
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe
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Size
168KB
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MD5
bea8900667c2c8b68971ea5b44b6c17a
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SHA1
29a847fe290723dd893f147829d47c6f1c36efa6
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SHA256
38dd06ab3a27af090c3963b34944df6db726be55298bc7c84a4d6fee61eb1daf
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SHA512
6e541f1d276bb47179cf43a2026cdf0f34db6eaa7fa27b74ba40e8712037d151042495e99e51d1b1f4cc3d14bd703b2b6c915e0ccee01eb6fe64b6b18c979160
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SSDEEP
3072:ZRpAyazIliazTnjybskVaXQnoKvJOPFbQ1MMDRepoDejPLLu7:xZ8azbjy3agnov1Q6PaKT/U
Malware Config
Signatures
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Executes dropped EXE 3 IoCs
pid Process 1300 CTS.exe 2020 61p7r1kkpTLUBIl.exe 1196 Process not Found -
Loads dropped DLL 2 IoCs
pid Process 2308 2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe 1196 Process not Found -
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" 2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_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 2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2308 2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe Token: SeDebugPrivilege 1300 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 2308 wrote to memory of 2020 2308 2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe 28 PID 2308 wrote to memory of 2020 2308 2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe 28 PID 2308 wrote to memory of 2020 2308 2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe 28 PID 2308 wrote to memory of 2020 2308 2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe 28 PID 2308 wrote to memory of 1300 2308 2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe 29 PID 2308 wrote to memory of 1300 2308 2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe 29 PID 2308 wrote to memory of 1300 2308 2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe 29 PID 2308 wrote to memory of 1300 2308 2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe 29
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_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:2308 -
C:\Users\Admin\AppData\Local\Temp\61p7r1kkpTLUBIl.exeC:\Users\Admin\AppData\Local\Temp\61p7r1kkpTLUBIl.exe2⤵
- Executes dropped EXE
PID:2020
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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:1300
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
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Filesize
97KB
MD50655a0af4a2ff9bf591f614ba8f5721f
SHA1b10d53dccec179109aff61b86ecca65be816f3c4
SHA256d1a473a0dd813bd3565b810dcb8ff8bc7907478a994c564d55200925894e0d32
SHA5129051043e6711b1f1b73f4137a8e4c16362c6be5d6c01b15f0430920ce096adf0b9f6a344462aadc5c2847ab5c0d9682df13803351449462dc5dda6059319d45f