Analysis
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max time kernel
133s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
30/05/2024, 23:24
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe
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Size
71KB
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MD5
490a955172e90c8fb03c0272a91c1028
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SHA1
7d2861751bd7c46663043f3d815d3b28af850d89
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SHA256
968e3fac7b477dfa7b0064ddd254e63155a20eced174f1d63d5b8a404c89ca33
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SHA512
428d86c847dcaf287c7450f4e16f88e7184c8ab0d1f4df53c3ea119828fefa2ecc322f82570c3ea5283e657c3b8f951825fa7fe1867e67e9706479142f4d819c
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTb:ZRpAyazIliazTb
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 3100 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" 2024-05-30_490a955172e90c8fb03c0272a91c1028_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 2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2312 2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe Token: SeDebugPrivilege 3100 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2312 wrote to memory of 3100 2312 2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe 83 PID 2312 wrote to memory of 3100 2312 2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe 83 PID 2312 wrote to memory of 3100 2312 2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2312 -
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:3100
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
394KB
MD5c3fdda17102fa9110b8051036612d99f
SHA1fc0cbe8e38267de9cf362997ff55237dc8bfc160
SHA25697a0ed8eb041ba88f70776955322e5dab2dd935ddb47787ac7fc93c8259c07a2
SHA5125b2f20889ffcac7928f9d0b8f36a80da85a040c55552e42d021120c4aeae35b00bbc77628d24e387b43e2a8d7bf5db96a7a3b051fafccb05e49359fb4eb571d9
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Filesize
71KB
MD500421a83c4d8d9f78bc025adde1c6fa9
SHA1e258562cbae75574ff5bdedcf113876520b83558
SHA2560c2167d8d5c4533bab3351a2a02b378156c77231e2ccb8347bc50cb1e5f5923d
SHA512f732859892f7c3e7b9f2a76416089012bcbb4dff006ca3b0c1a76cb38470a89d5bb59ecde92ebbec71bedd021fb2f253ad91c946d8a0927b04957012d10a1916
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432