Analysis
-
max time kernel
131s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
24-05-2024 22:14
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe
Resource
win10v2004-20240426-en
General
-
Target
2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe
-
Size
71KB
-
MD5
c9d2725ba3321b45c0cde2c13b6af927
-
SHA1
75bfc4bf942d0f6a329041f96721df70721f11bf
-
SHA256
2c88ab44e641076f484808752229729163e200b9137dd417a8d174075902e1f5
-
SHA512
f542d7aa66aaaa1e24352448bcb4e5b363f4ba3c7e46d5d6eb40fd96696e03556763336de10bf193cae60beddef1c0f347c3f70a910ee47b40e243522d7597c3
-
SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTcE:ZRpAyazIliazTL
Malware Config
Signatures
-
Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 4228 CTS.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
-
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_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:
2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 4828 2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe Token: SeDebugPrivilege 4228 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exedescription pid process target process PID 4828 wrote to memory of 4228 4828 2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe CTS.exe PID 4828 wrote to memory of 4228 4828 2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe CTS.exe PID 4828 wrote to memory of 4228 4828 2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe CTS.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
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
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xmlFilesize
394KB
MD54959851d42037251b2f86724e8c021f3
SHA125c0353ea9161184932f1dbef40ab94ff4bc101f
SHA2564f2eda069aef717172cca31433c61c2b8f4a602e473b2c1bc28484a6645d2ac5
SHA512bbd5f9e94ad05ef21e7f2e0958478d66c468fb2ca91a2834d46f352be55c85ae9830201f354f876109bc5be5e200c4abc4984f97ce04a59c3b70dd80f92bac94
-
C:\Users\Admin\AppData\Local\Temp\Wq2Sahy9zxZIMhJ.exeFilesize
71KB
MD562a7509a089bc2992908bac688d8ad9a
SHA1cd0f0c6022c1587884b2cb2ad4b7023923d64a9c
SHA256e1fd55bed0339af6a69be9965140b2bf31d05ffc4ba3f8cf6739866bca2a4ab7
SHA512fc0bb0c406d888521df3ab5da6acfe3c75fb3ccff2a6586d84a9b227490557cf0c26a87c474528fc604854dfa9bb035ee79fe6b7f0a792ff3a1ce24539bdec19
-
C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432