Analysis
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max time kernel
121s -
max time network
121s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
24-05-2024 15:24
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exe
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Size
96KB
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MD5
62d4f848dea6781a7a6648839773e367
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SHA1
41634f2e92f0dd4680730047a73fcd3a7021290a
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SHA256
496c0be77aef769d304b3e55f08b27edd62462f6f0ff7588e9c9df0fb3ebe1e0
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SHA512
e145d8ffd37e1d8ac5ccc292d4f03ee409ac2e91af9868b552c47241707359d0ed8aac06d8e785c0d69bdf39036c6df7fc66dd06d47598f2c1b3aac66e0d8899
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT1B+Q0e+BJWSX+vFotwhPAFyTr/:ZRpAyazIliazTGQJ+eS4FotwhyyP/
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
7o0D5B1Z1JkRI2z.exeCTS.exepid process 1752 7o0D5B1Z1JkRI2z.exe 2836 CTS.exe -
Loads dropped DLL 3 IoCs
Processes:
2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exepid process 1952 2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exe 1952 2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exe 1840 -
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:
2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-24_62d4f848dea6781a7a6648839773e367_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:
2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 1952 2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exe Token: SeDebugPrivilege 2836 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exedescription pid process target process PID 1952 wrote to memory of 1752 1952 2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exe 7o0D5B1Z1JkRI2z.exe PID 1952 wrote to memory of 1752 1952 2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exe 7o0D5B1Z1JkRI2z.exe PID 1952 wrote to memory of 1752 1952 2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exe 7o0D5B1Z1JkRI2z.exe PID 1952 wrote to memory of 1752 1952 2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exe 7o0D5B1Z1JkRI2z.exe PID 1952 wrote to memory of 2836 1952 2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exe CTS.exe PID 1952 wrote to memory of 2836 1952 2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exe CTS.exe PID 1952 wrote to memory of 2836 1952 2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exe CTS.exe PID 1952 wrote to memory of 2836 1952 2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-24_62d4f848dea6781a7a6648839773e367_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-24_62d4f848dea6781a7a6648839773e367_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
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C:\Users\Admin\AppData\Local\Temp\7o0D5B1Z1JkRI2z.exeC:\Users\Admin\AppData\Local\Temp\7o0D5B1Z1JkRI2z.exe2⤵
- Executes dropped EXE
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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\Temp\7o0D5B1Z1JkRI2z.exeFilesize
96KB
MD5ecc67d98c92342f757db2191ec8bb7db
SHA1e746ff7ff4c3661097095d663c253631cedd282a
SHA256845fa7c4920a7fc727c5d495966341375a6ff4edd5b37fe98b5c8e9cbcbe4ab2
SHA512d2b6c51042a2ebbfc383003e45322a5b75fd8b4b0245dc7ebd8d9ef005b4b4b2b3480e0c1f0e071155bbce1f75ed6b4d68ea67552a481c10cfca89a94dc36f2b
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C:\Users\Admin\AppData\Local\Temp\7o0D5B1Z1JkRI2z.exeFilesize
25KB
MD5abbd49c180a2f8703f6306d6fa731fdc
SHA1d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA2565f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
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C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
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memory/1752-15-0x0000000000400000-0x000000000040D000-memory.dmpFilesize
52KB