Analysis
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max time kernel
131s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
27-05-2024 06:36
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
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Size
71KB
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MD5
aca7b8ee0d6846564ad083cd3758902a
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SHA1
18ad718453dc5c34e0002470084511b839a46f54
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SHA256
9665ffbe036b6b4d6cf6e02b38b50cb5efd4af90d56eed0c13b0ebd325f8c94f
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SHA512
26bae61277fd814ea17c907b49153d579856c1844593824f6303c153209c8c1ac72e75640c3a46c31d39459fb195ce872db77a3c7ab893eb0ed761bc8ce3a1d5
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTe:ZRpAyazIliazTe
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 2400 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
Processes:
2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_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
Processes:
2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 3204 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe Token: SeDebugPrivilege 2400 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exedescription pid process target process PID 3204 wrote to memory of 2400 3204 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe CTS.exe PID 3204 wrote to memory of 2400 3204 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe CTS.exe PID 3204 wrote to memory of 2400 3204 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3204 -
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:2400
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
392KB
MD5f5ccf83df63d51ed13c86ce1f641e290
SHA128cbbcaaaa0deac078b5d8fb72b9e00de41508b9
SHA2568409548c220a9394f7416a7688ff7e996ef1dc8642b915459feee351ec7351d8
SHA512ebe9dc3e202bd56e689e24ae81d7208d9c89752c56701fdf58ea487b75f7f5d1c3796a5e5f39e16ac3b23479c0229d937dfc69a03da4813f94179956b3065b22
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Filesize
71KB
MD5d9941a0ed9c1387b0277b45e3b782b40
SHA111cfca64e76ed375fd90de87b4b47916a7f79dd3
SHA25669def515d2e78339d9080ad580dd056c7cdec5d47878429fd23243671f6940db
SHA5120052317d4e746dab40559e2669e1dfe7b5aba456c5f02d056ec53547bd1fdd1bfbfcdb71dd1b2223ddb8d57a0e0ac7ff7db9731879f868b8d0a05c66b5999ef1
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432