b7b066a77ec79f811f75b96770fe1d1e9f02ca6c9d4898bfc298101230347f7a

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 03:42

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General

Target

2024-05-23_7b63d6078b19f01a820afc4d1c85662a_bkransomware.exe
Size

108KB
MD5

7b63d6078b19f01a820afc4d1c85662a
SHA1

ade3d124ef86295121e9eb2d4fba6ca4f0aba570
SHA256

b7b066a77ec79f811f75b96770fe1d1e9f02ca6c9d4898bfc298101230347f7a
SHA512

e1847bbe027a5cb9137850b29d0d633824be2959ec6f78d5159ddfb72f9626605ef13c792be348235e21a13a667daf9d85026172033540204bea4b58e913eb89
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTMhUaV76teZBSft2yWFx:ZhpAyazIlyazToVqevSfY/Fx

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

VjAyleT9XDlVgoW.exeCTS.exe

pid process

208 VjAyleT9XDlVgoW.exe
4384 CTS.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

pid	process
208	VjAyleT9XDlVgoW.exe
4384	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-23_7b63d6078b19f01a820afc4d1c85662a_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-23_7b63d6078b19f01a820afc4d1c85662a_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.exe2024-05-23_7b63d6078b19f01a820afc4d1c85662a_bkransomware.exe

description ioc process

File created C:\Windows\CTS.exe CTS.exe
File created C:\Windows\CTS.exe 2024-05-23_7b63d6078b19f01a820afc4d1c85662a_bkransomware.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-23_7b63d6078b19f01a820afc4d1c85662a_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1696 2024-05-23_7b63d6078b19f01a820afc4d1c85662a_bkransomware.exe
Token: SeDebugPrivilege 4384 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	CTS.exe
File created	C:\Windows\CTS.exe	2024-05-23_7b63d6078b19f01a820afc4d1c85662a_bkransomware.exe

description	pid	process
Token: SeDebugPrivilege	1696	2024-05-23_7b63d6078b19f01a820afc4d1c85662a_bkransomware.exe
Token: SeDebugPrivilege	4384	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-05-23_7b63d6078b19f01a820afc4d1c85662a_bkransomware.exe

description	pid	process	target process
PID 1696 wrote to memory of 208	1696	2024-05-23_7b63d6078b19f01a820afc4d1c85662a_bkransomware.exe	VjAyleT9XDlVgoW.exe
PID 1696 wrote to memory of 208	1696	2024-05-23_7b63d6078b19f01a820afc4d1c85662a_bkransomware.exe	VjAyleT9XDlVgoW.exe
PID 1696 wrote to memory of 4384	1696	2024-05-23_7b63d6078b19f01a820afc4d1c85662a_bkransomware.exe	CTS.exe
PID 1696 wrote to memory of 4384	1696	2024-05-23_7b63d6078b19f01a820afc4d1c85662a_bkransomware.exe	CTS.exe
PID 1696 wrote to memory of 4384	1696	2024-05-23_7b63d6078b19f01a820afc4d1c85662a_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_7b63d6078b19f01a820afc4d1c85662a_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_7b63d6078b19f01a820afc4d1c85662a_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1696

C:\Users\Admin\AppData\Local\Temp\VjAyleT9XDlVgoW.exe
C:\Users\Admin\AppData\Local\Temp\VjAyleT9XDlVgoW.exe
2⤵
- Executes dropped EXE
PID:208

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:4384

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
392KB

MD5
e9d63b164a273b1ac558a9adad7a2b35

SHA1
4a130e297b6911b8e86755526cee503793276477

SHA256
cf2d44c7a6a708893d74c1a5aa9c71019a967382eccbcf7616782b9fe2837088

SHA512
ec8103b0a17eb35c9a721d0ad8ae3f8149a601bbf45ee4dd82dccc1ea394c50063dae27e4b5baafe37db2a34a2da45a72f5e43d6be3a84d4909d1c899039a4bf

Download Submit
C:\Users\Admin\AppData\Local\Temp\VjAyleT9XDlVgoW.exe
Filesize
37KB

MD5
371627fd939bb54ed26f473ca54e718f

SHA1
3a6910295ae9d1fe388b7572736b8bdfc6e0d111

SHA256
b5481e424246a174456add0132427df3a7cd4105f5769835cdf597966c7c0b61

SHA512
ff7ea5ae445089ffa808c97e23c620313dd267994b343176c0cb9f8098aace1d12d9212b96611fdf97c974ef94f866b817aed9c0e5f4f195234e7d8d4ec3f8cd

Download Submit
C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
memory/208-14-0x00007FFFBA453000-0x00007FFFBA455000-memory.dmp

Filesize
8KB

Download
memory/208-16-0x00000000004E0000-0x00000000004EE000-memory.dmp

Filesize
56KB

Download
memory/208-25-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

Filesize
10.8MB

Download
memory/208-33-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

Filesize
10.8MB

Download