Analysis
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max time kernel
122s -
max time network
127s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
23-05-2024 03:27
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe
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Size
71KB
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MD5
1e1e811a22a8d2de12f347ae8df4199b
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SHA1
31463572231e85500b00d9247c8e27c8da4f4599
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SHA256
4a71ac5dcead7769bfbb7cb2e8591380f55509aec570463caba3db174f1fb44c
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SHA512
838f0585919dfcd804396671993b33c0b8f07763973d5124c87d46fc912474320298d9cf0b300de14785c551582f94ab3b74058d51803d94d34ff76edf3ae6e6
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT7:ZhpAyazIlyazT7
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 2864 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:
2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_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:
2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2956 2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe Token: SeDebugPrivilege 2864 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exedescription pid process target process PID 2956 wrote to memory of 2864 2956 2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe CTS.exe PID 2956 wrote to memory of 2864 2956 2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe CTS.exe PID 2956 wrote to memory of 2864 2956 2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe CTS.exe PID 2956 wrote to memory of 2864 2956 2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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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
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Downloads
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C:\Users\Admin\AppData\Local\Temp\JjmyDrxZbTbv13r.exeFilesize
71KB
MD54c0a263b329b96a4bd3582a8af8f008c
SHA119a3170b1431729d36585d5b8d844dbca3c4fb3d
SHA25655aa1eb08399e81972b9c7f89b733c5180b8475c83c974e429366c426bcf33ba
SHA51249a2b2d629941ec928980aec1a922b8f3e63199eb8645910a07c7361b2ab73334daa4bc978b71ed1aad78dc5a3f30c941e086974a09d53629dae24814a993d67
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C:\Windows\CTS.exeFilesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25