Analysis
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max time kernel
150s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-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 4572 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 CTS.exe File created C:\Windows\CTS.exe 2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3588 2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe Token: SeDebugPrivilege 4572 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 3588 wrote to memory of 4572 3588 2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe 82 PID 3588 wrote to memory of 4572 3588 2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe 82 PID 3588 wrote to memory of 4572 3588 2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe 82
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:3588 -
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:4572
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
394KB
MD5ee907f5a0476be7887d985bf0cef8f05
SHA1e2fbae42d9c8494715e9d07a6624d6b105762ad4
SHA2566b6305b19882c457ac24735746b6fbe7c6699cd96016fc5dc58249d35d22b097
SHA51239f26f2ef7d017ce46ee2484f68d76334cdf2e2365026a4944d900134f113093c0bebc8e35a8412311a458034863c735124f04ab8894ddffcd550413ba051832
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Filesize
71KB
MD59600074862b1d726778322e81220bcf5
SHA112886b9a7038d51ba76248dc16740aa87f00a512
SHA25676b1a378d4fbfcd013dc6e900e099ee9222aae0cd159dec44121a02f361c8877
SHA51226c38037fa609c74772039319bec237798f067d4b0ddf7b9e125ab254f2f1d6c5a530ca8b3abe85826361aff3b3a68a227f4d3dae2ce6d9790cff09d71dd91ae
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432