Malware Analysis Report

2025-01-03 08:39

Sample ID 240509-yxvrhacc2t
Target 2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia
SHA256 cef236aad78748a302ce3625ef5ed4d498ef38ae3122fdeaafa8ce328545b578
Tags
gandcrab backdoor persistence ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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 Overview

score
10/10

SHA256

cef236aad78748a302ce3625ef5ed4d498ef38ae3122fdeaafa8ce328545b578

Threat Level: Known bad

The file 2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia was found to be: Known bad.

Malicious Activity Summary

gandcrab backdoor persistence ransomware

Gandcrab

GandCrab payload

Detects Reflective DLL injection artifacts

Detects ransomware indicator

Gandcrab Payload

Adds Run key to start application

Enumerates connected drives

Unsigned PE

Program crash

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Checks processor information in registry

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-09 20:10

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-09 20:10

Reported

2024-05-09 20:12

Platform

win7-20240221-en

Max time kernel

140s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe"

Signatures

GandCrab payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Gandcrab

ransomware backdoor gandcrab

Detects Reflective DLL injection artifacts

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Detects ransomware indicator

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Gandcrab Payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\gwnlavfhaai = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\icjueq.exe\"" C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\I: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\J: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\M: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\N: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\O: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\P: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\A: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\B: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\Q: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\S: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\X: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\E: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\R: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\U: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\G: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\H: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\T: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\V: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\W: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\Y: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\K: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
File opened (read-only) \??\L: C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe

"C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2012 -s 712

Network

Country Destination Domain Proto
US 8.8.8.8:53 ipv4bot.whatismyipaddress.com udp

Files

memory/2012-5-0x0000000000400000-0x0000000000428000-memory.dmp

memory/2012-6-0x0000000000400000-0x000000000055A000-memory.dmp

memory/2012-4-0x0000000000270000-0x0000000000370000-memory.dmp

memory/2012-1-0x0000000000400000-0x000000000055A000-memory.dmp

memory/2012-2-0x0000000000250000-0x0000000000267000-memory.dmp

memory/2012-14-0x0000000000270000-0x0000000000370000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-09 20:10

Reported

2024-05-09 20:13

Platform

win10v2004-20240426-en

Max time kernel

138s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe"

Signatures

GandCrab payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Gandcrab

ransomware backdoor gandcrab

Detects Reflective DLL injection artifacts

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Detects ransomware indicator

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Gandcrab Payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe

"C:\Users\Admin\AppData\Local\Temp\2024-05-09_c08f95ba7c678d23712d6c8c9673a37b_mafia.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3628 -ip 3628

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3628 -s 452

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
BE 88.221.83.184:443 www.bing.com tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 184.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 24.121.18.2.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp

Files

memory/3628-3-0x0000000000400000-0x000000000055A000-memory.dmp

memory/3628-2-0x00000000007E0000-0x00000000007F7000-memory.dmp

memory/3628-6-0x0000000000400000-0x000000000055A000-memory.dmp

memory/3628-5-0x0000000000400000-0x0000000000428000-memory.dmp

memory/3628-4-0x0000000000820000-0x0000000000920000-memory.dmp