Malware Analysis Report

2024-10-16 03:25

Sample ID 201104-w78w1bak72
Target t2.bat.zip
SHA256 19ffefca0054a6fccff7721f57e711e881a3ecfde650a7258cf89b5f3c5e95af
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

19ffefca0054a6fccff7721f57e711e881a3ecfde650a7258cf89b5f3c5e95af

Threat Level: Known bad

The file t2.bat.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 18:16

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2020-11-04 18:16

Reported

2020-11-04 18:18

Platform

win7v20201028

Max time kernel

3s

Max time network

10s

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 1204 wrote to memory of 1828 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1204 wrote to memory of 1828 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1204 wrote to memory of 1828 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1204 wrote to memory of 1828 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1204 wrote to memory of 1828 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1204 wrote to memory of 1828 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1204 wrote to memory of 1828 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/1828-0-0x0000000000000000-mapping.dmp

memory/1828-1-0x00000000001E0000-0x000000000021F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2020-11-04 18:16

Reported

2020-11-04 18:18

Platform

win10v20201028

Max time kernel

12s

Max time network

110s

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 500 wrote to memory of 1216 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 500 wrote to memory of 1216 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 500 wrote to memory of 1216 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/1216-0-0x0000000000000000-mapping.dmp

memory/1216-1-0x0000000000870000-0x00000000008AF000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2020-11-04 18:16

Reported

2020-11-04 18:18

Platform

win7v20201028

Max time kernel

3s

Max time network

8s

Command Line

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

Signatures

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1852 wrote to memory of 1192 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 1852 wrote to memory of 1192 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 1852 wrote to memory of 1192 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\spr.bat"

C:\Windows\system32\rundll32.exe

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

Network

N/A

Files

memory/1192-0-0x0000000000000000-mapping.dmp

Analysis: behavioral4

Detonation Overview

Submitted

2020-11-04 18:16

Reported

2020-11-04 18:18

Platform

win10v20201028

Max time kernel

10s

Max time network

116s

Command Line

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

Signatures

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 984 wrote to memory of 640 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 984 wrote to memory of 640 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\spr.bat"

C:\Windows\system32\rundll32.exe

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

Network

N/A

Files

memory/640-0-0x0000000000000000-mapping.dmp