Analysis
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max time kernel
121s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
08/06/2024, 20:33
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe
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Size
71KB
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MD5
490cc71f335c60d7e0655c8258dba016
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SHA1
41d67dccb05c9baeb4b9bdc6263ad1b2a1caee77
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SHA256
ab0f890a4d3ebd0611f77ff7018453eac882a131a815b68798f73ff45d5c4fa3
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SHA512
32e6bb4c1644881b326b7e2eba921e101c7472a5533edc8372e9a18c804fb1c9272958e2b88baa7f3cc88ea864dce4b8c61d6645d76dda70dbd985f66656824f
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT7:ZRpAyazIliazT7
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 2844 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" 2024-06-08_490cc71f335c60d7e0655c8258dba016_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 2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2452 2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe Token: SeDebugPrivilege 2844 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2452 wrote to memory of 2844 2452 2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe 28 PID 2452 wrote to memory of 2844 2452 2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe 28 PID 2452 wrote to memory of 2844 2452 2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe 28 PID 2452 wrote to memory of 2844 2452 2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2452 -
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:2844
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD59c70e3e3fa178cd80940079b570667d5
SHA1d7f8af9dfb0527bf92bc6198414dee2d56a5f0d9
SHA256c74cfbaa3095aecb5a7f40ba2a052af25d2eb8aa6195ef5fb44098719fe2b973
SHA512ea8710abf7941b60c9d15070fb040d65863927b1a158b8ac0db25d18884e11c80d9eea7c868fe0de8c5ddddd1b7ddf45b7ce828f25835ea10b77e96b4b8e16df
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432