Analysis
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max time kernel
121s -
max time network
125s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
09/06/2024, 07:34
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe
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Size
71KB
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MD5
cf39085b9da0db42e767436878da1cf6
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SHA1
e04ad1d12a3bd14bb1d5c9ab1bc2b751cfaad55a
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SHA256
04c56b9ff809aaef4afafe40c233fa1f9264b9783216e76c1311528651f706af
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SHA512
cbc42bba577dcf6034dce05d7c76efa1e7e0fc885f8047c1edf8e0683fd2c4b3e2fa5d266edd8ea9c2bdaeba59c0236142630ca4416037039cf9fbb9be06d972
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT8:ZRpAyazIliazT8
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 2364 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" 2024-06-09_cf39085b9da0db42e767436878da1cf6_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 2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2256 2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe Token: SeDebugPrivilege 2364 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2256 wrote to memory of 2364 2256 2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe 28 PID 2256 wrote to memory of 2364 2256 2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe 28 PID 2256 wrote to memory of 2364 2256 2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe 28 PID 2256 wrote to memory of 2364 2256 2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2256 -
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:2364
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5e3d43aeb96db1f81d07586647c3a5ee2
SHA160791e9ad0a48ba846a18ddb38faaa6cf78d1ab1
SHA25634ffd65b7294528fb8327bcab8010755f5258c340319a909b0f171f95f5760de
SHA512a230f8a5d3283b9d9c46db2c31dfaffca889832d578407ad62791bd4352fe64a4d917247822130f6062e43e9c22cc5162da6f6cffcdca86e38d22ac362fe6138
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432