Analysis
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max time kernel
67s -
max time network
53s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
28-04-2024 14:39
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe
Resource
win10v2004-20240419-en
General
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Target
2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe
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Size
71KB
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MD5
752392f1bef1e07da173939366af26cc
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SHA1
615e4b5bef1540909af63f7f66b91e2870353ae5
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SHA256
8ad534cf58277e5822a0ce3cce7c984ed9b1e52e7d9f3420ea611df69d6f1eea
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SHA512
62148fb85ebf7a990f73871e14f85b50a0c17666956ca407fba081a60045d25cb871e181443e31fb6d0552640a82c5fafb7970b23715bc622da50eb303653b51
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT9:ZhpAyazIlyazT9
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 764 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:
2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-04-28_752392f1bef1e07da173939366af26cc_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:
2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 3280 2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe Token: SeDebugPrivilege 764 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exedescription pid process target process PID 3280 wrote to memory of 764 3280 2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe CTS.exe PID 3280 wrote to memory of 764 3280 2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe CTS.exe PID 3280 wrote to memory of 764 3280 2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-28_752392f1bef1e07da173939366af26cc_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
MD5e7d4dba8c5b1559b00dd0a0fb561dcc2
SHA10649ff7631cc283b4e515938f12a2b929e6e8579
SHA256830d6ca791f815b67d3e7ecf65ff37d14d00a4eed4beb46cd9a677d8fa3676e3
SHA51237e8812d7750f508075225c33e653088230f286a359f6081c380c8906f7410e2a7ead2c4fb262f324da0f30f7e893ae520ec63bc4930517a474eb7d580f7909c
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C:\Users\Admin\AppData\Local\Temp\A1znnlzaCgMfGbh.exeFilesize
71KB
MD5e3f58586ef412a971af21261e7618fa4
SHA1c1e072c63f190e084dd9ad3ab26a7a6544c2602d
SHA2561ca5222d959dde5df07d171a9873c85987e0e68a94526e4ee5d501dc91a7f0e5
SHA5121371a534b887ac5afe1364e46df48b5119cfa01ae9aa5f7b89002149fc8aae1fa8cfff2a7efa1ba8fe8c9ca8a920820853b45ee14368ab0d0f1bebf82de7cadd
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C:\Windows\CTS.exeFilesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25