Analysis
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max time kernel
150s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-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 4928 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:
CTS.exe2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" CTS.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe -
Drops file in Windows directory 2 IoCs
Processes:
CTS.exe2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exedescription ioc process File created C:\Windows\CTS.exe CTS.exe File created C:\Windows\CTS.exe 2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 4732 2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe Token: SeDebugPrivilege 4928 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exedescription pid process target process PID 4732 wrote to memory of 4928 4732 2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe CTS.exe PID 4732 wrote to memory of 4928 4732 2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe CTS.exe PID 4732 wrote to memory of 4928 4732 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\Microsoft\Office\16.0\excel.exe_Rules.xmlFilesize
394KB
MD5e951c15d614f89bffbd76a6761b80c26
SHA1906aefabe3091d1d3dd8a22ab8fc1ebc65a7eb2c
SHA2563a37094db8741fd1de33bd056ff2b5d94a1386dc19e42db58a8431c4372c2645
SHA5121d14607c3e8e1d7e99346865e02a4b588d5d3b1f4d89c089f0bf1f520fdd626dac3d15b202a0d8c4f4e10bff3e5509b8950022c99d3883c7df9acc4b19e0a63c
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C:\Users\Admin\AppData\Local\Temp\9J1uZU2xTsuMmUB.exeFilesize
71KB
MD53619c6792cb5a14b4c1275dd7e7cc87c
SHA156e36480bb4df8c8f98e002606cb66c6b349ae15
SHA256a84ecb58284cf02e1181db486988de1836a0c34cfaf1784c05a96ea24e0af4eb
SHA5123ed0c5262495fa01090f670122d3db572785b329244c6cca42491ef3fa1b07bf9e011e70ef5ddf9419303b638b62634cb4dea1d6f52eea916b8ca2ee9f8eef93
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C:\Windows\CTS.exeFilesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25