Malware Analysis Report

2024-10-16 03:25

Sample ID 201104-d5kx39hf4e
Target t7.zip
SHA256 fb192676689ade730c1aa72c2064df1137779a4e7c594f1575f1043d9eafcd5c
Tags
egregor ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

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 Overview

score
10/10

SHA256

fb192676689ade730c1aa72c2064df1137779a4e7c594f1575f1043d9eafcd5c

Threat Level: Known bad

The file t7.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 19:17

Signatures

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2020-11-04 19:17

Reported

2020-11-04 19:19

Platform

win10v20201028

Max time kernel

12s

Max time network

118s

Command Line

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\spr3.bat"

Signatures

Egregor Ransomware

ransomware egregor

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3936 wrote to memory of 652 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 3936 wrote to memory of 652 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 652 wrote to memory of 588 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 652 wrote to memory of 588 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 652 wrote to memory of 588 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\spr3.bat"

C:\Windows\system32\rundll32.exe

rundll32.exe "C:\Users\Admin\AppData\Local\Temp\b.dll",DllRegisterServer --passegregor09 --append="antani" --multiproc

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe "C:\Users\Admin\AppData\Local\Temp\b.dll",DllRegisterServer --passegregor09 --append="antani" --multiproc

Network

N/A

Files

memory/652-0-0x0000000000000000-mapping.dmp

memory/588-1-0x0000000000000000-mapping.dmp

memory/588-2-0x0000000002E90000-0x0000000002ECF000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2020-11-04 19:17

Reported

2020-11-04 19:19

Platform

win7v20201028

Max time kernel

3s

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 1320 wrote to memory of 1184 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1320 wrote to memory of 1184 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1320 wrote to memory of 1184 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1320 wrote to memory of 1184 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1320 wrote to memory of 1184 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1320 wrote to memory of 1184 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1320 wrote to memory of 1184 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/1184-0-0x0000000000000000-mapping.dmp

memory/1184-1-0x0000000000240000-0x000000000027F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2020-11-04 19:17

Reported

2020-11-04 19:19

Platform

win10v20201028

Max time kernel

13s

Max time network

102s

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 1124 wrote to memory of 2024 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1124 wrote to memory of 2024 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1124 wrote to memory of 2024 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/2024-0-0x0000000000000000-mapping.dmp

memory/2024-1-0x0000000002A30000-0x0000000002A6F000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2020-11-04 19:17

Reported

2020-11-04 19:19

Platform

win7v20201028

Max time kernel

100s

Max time network

102s

Command Line

cmd /c "C:\Users\Admin\AppData\Local\Temp\spr3.bat"

Signatures

Egregor Ransomware

ransomware egregor

Processes

C:\Windows\system32\cmd.exe

cmd /c "C:\Users\Admin\AppData\Local\Temp\spr3.bat"

C:\Windows\system32\rundll32.exe

rundll32.exe "C:\Users\Admin\AppData\Local\Temp\b.dll",DllRegisterServer --passegregor09 --append="antani" --multiproc

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe "C:\Users\Admin\AppData\Local\Temp\b.dll",DllRegisterServer --passegregor09 --append="antani" --multiproc

Network

N/A

Files

memory/1240-0-0x0000000000000000-mapping.dmp

memory/1284-1-0x0000000000000000-mapping.dmp

memory/1284-2-0x0000000001C60000-0x0000000001C9F000-memory.dmp