Analysis
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max time kernel
51s -
max time network
51s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
13-06-2024 03:54
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe
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Size
96KB
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MD5
fae16e4b6c2754512cd232f6ec1311be
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SHA1
d1cfc31cbc512d345b1547cd5df8816b0e1f4ff4
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SHA256
3b362a61193dddcab3f3d7c7d150108b7fcb027a689560cefbffa11d40c478f7
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SHA512
3893e81939d01f1645bc482a05d6f9a2048b62ff64e62ef86c3db0d089b23b9dc4a6a62e5f51a401db55ae38ef70b67690a4e4d13b32cd8691b8a2619b914818
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTQ7rwiObRKTFwVlThA:ZhpAyazIlyazTQ7CKmVk
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
COKEZpDUUJb1I3F.exeCTS.exepid process 1224 COKEZpDUUJb1I3F.exe 2916 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:
2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-13_fae16e4b6c2754512cd232f6ec1311be_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:
2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 232 2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe Token: SeDebugPrivilege 2916 CTS.exe -
Suspicious use of WriteProcessMemory 5 IoCs
Processes:
2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exedescription pid process target process PID 232 wrote to memory of 1224 232 2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe COKEZpDUUJb1I3F.exe PID 232 wrote to memory of 1224 232 2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe COKEZpDUUJb1I3F.exe PID 232 wrote to memory of 2916 232 2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe CTS.exe PID 232 wrote to memory of 2916 232 2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe CTS.exe PID 232 wrote to memory of 2916 232 2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:232 -
C:\Users\Admin\AppData\Local\Temp\COKEZpDUUJb1I3F.exeC:\Users\Admin\AppData\Local\Temp\COKEZpDUUJb1I3F.exe2⤵
- Executes dropped EXE
PID:1224
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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
PID:2916
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
394KB
MD5d7db552f3b735605769344828927c283
SHA13ecedb24c1e893b5288abe0de24c9582b7c07602
SHA25606a86a5e1faad9b3335fdc6a2923922e3dd859294739daeb8562baf07f9fb9a2
SHA512eaf915b3782acbd4ab940bc687e3fb1bddad30c272077d3adbc7f15b9770ab141da64d6605a6e14baa8db84d1b7a63e5d451a058e2ad9a664a3caeb50318d6af
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Filesize
25KB
MD5abbd49c180a2f8703f6306d6fa731fdc
SHA1d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA2565f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25