Analysis
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max time kernel
119s -
max time network
124s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
04-06-2024 00:49
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe
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Size
71KB
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MD5
7f7b563cc77e13904ee0314a725cd083
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SHA1
08f89112dfdbdb88257d8320846d864b48e9048a
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SHA256
06d6584f45c5204cf03d122f344f333b8a0562872a3dc1ad9260d4595ca605c5
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SHA512
97728b54f71e8c419b1702e963e13de011271893d4ac1f41ec6439b71d8414019d77204cdbf9f453245bd3c8d2bd2cd79c559a8d93541d6849e9b65035f12087
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT0:ZRpAyazIliazT0
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 3016 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:
2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-04_7f7b563cc77e13904ee0314a725cd083_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:
2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2888 2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe Token: SeDebugPrivilege 3016 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exedescription pid process target process PID 2888 wrote to memory of 3016 2888 2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe CTS.exe PID 2888 wrote to memory of 3016 2888 2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe CTS.exe PID 2888 wrote to memory of 3016 2888 2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe CTS.exe PID 2888 wrote to memory of 3016 2888 2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2888 -
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:3016
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD51d749ab21309f18dcd4409daf60f477e
SHA13bb45b3a15750ed4c7b22a0b46d88571fa46a546
SHA2564c0176766c12980eed973f3408b9b55a36f181e86bdb6b7d5f0b2a00ada9d81c
SHA51281345697296aa69228d4a04782ccbfc025ac27ba29aacf95ca3208b605c05fd5f3214b3d7dae3a62ee37e8bd92d213c01c9ac1efe67294413e01954960b32432
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432