Analysis
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max time kernel
121s -
max time network
124s -
platform
windows7_x64 -
resource
win7-20240220-en -
resource tags
arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system -
submitted
12-06-2024 23:42
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe
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Size
96KB
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MD5
f2ce67d38e837bcfd5590eb3ef5780f2
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SHA1
81b51cdaa8203e6bfa7c02924b27233a9473a643
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SHA256
c851f928e60b89904940b6631194cfb79973013cfae63424fed961929de265be
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SHA512
6b106c572c7ea7b772457d5be3c8ed85f3ef92db64ecd920ead43051d69c1194acbf0c4805faf1a99e474db4cd61cbb7cfc6350efd22adece60098dd747ec5b5
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT/RbZ3TZ3Yp:ZRpAyazIliazT/RbR130
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
CTS.exetDUxEbe8PEocMst.exepid Process 2012 CTS.exe 2864 tDUxEbe8PEocMst.exe -
Loads dropped DLL 3 IoCs
Processes:
2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exepid Process 2076 2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe 2076 2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe 2784 -
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:
2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exeCTS.exedescription ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_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:
CTS.exe2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exedescription ioc Process File created C:\Windows\CTS.exe CTS.exe File created C:\Windows\CTS.exe 2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exeCTS.exedescription pid Process Token: SeDebugPrivilege 2076 2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe Token: SeDebugPrivilege 2012 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exedescription pid Process procid_target PID 2076 wrote to memory of 2864 2076 2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe 28 PID 2076 wrote to memory of 2864 2076 2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe 28 PID 2076 wrote to memory of 2864 2076 2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe 28 PID 2076 wrote to memory of 2864 2076 2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe 28 PID 2076 wrote to memory of 2012 2076 2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe 29 PID 2076 wrote to memory of 2012 2076 2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe 29 PID 2076 wrote to memory of 2012 2076 2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe 29 PID 2076 wrote to memory of 2012 2076 2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe 29
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe"1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2076 -
C:\Users\Admin\AppData\Local\Temp\tDUxEbe8PEocMst.exeC:\Users\Admin\AppData\Local\Temp\tDUxEbe8PEocMst.exe2⤵
- Executes dropped EXE
PID:2864
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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:2012
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
25KB
MD5abbd49c180a2f8703f6306d6fa731fdc
SHA1d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA2565f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
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Filesize
96KB
MD567b95bddfb19a7874b5175dd08dea3ae
SHA14d8a69e63debb43012048bdddcdab889ddbd858f
SHA256437b80f8d35fad3b40fab875d0faf16bbaa050ff798b5908b41dddc451cfcb8e
SHA5123df4b665bdf387f0de928c472c11deaba317d26325de11cbcd481598e3a7f74400b89ec10443d2dbea2e30bac993b6cd57acc38fc16a0275ae7314f2f0a727e3
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432