Malware Analysis Report

2025-04-03 14:07

Sample ID 241109-2rfbeatfqn
Target 18d7281ad2a66b5f602ad32450e346b8baa3b8b07f7825192f46b280abf07e91N
SHA256 18d7281ad2a66b5f602ad32450e346b8baa3b8b07f7825192f46b280abf07e91
Tags
discovery persistence privilege_escalation
score
8/10

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
8/10

SHA256

18d7281ad2a66b5f602ad32450e346b8baa3b8b07f7825192f46b280abf07e91

Threat Level: Likely malicious

The file 18d7281ad2a66b5f602ad32450e346b8baa3b8b07f7825192f46b280abf07e91N was found to be: Likely malicious.

Malicious Activity Summary

discovery persistence privilege_escalation

Event Triggered Execution: AppInit DLLs

Executes dropped EXE

Drops file in Program Files directory

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of UnmapMainImage

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-09 22:48

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-09 22:48

Reported

2024-11-09 22:50

Platform

win7-20240708-en

Max time kernel

117s

Max time network

117s

Command Line

"C:\Users\Admin\AppData\Local\Temp\18d7281ad2a66b5f602ad32450e346b8baa3b8b07f7825192f46b280abf07e91N.exe"

Signatures

Event Triggered Execution: AppInit DLLs

persistence privilege_escalation

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\PROGRA~3\Mozilla\yofzeuh.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\PROGRA~3\Mozilla\yofzeuh.exe C:\Users\Admin\AppData\Local\Temp\18d7281ad2a66b5f602ad32450e346b8baa3b8b07f7825192f46b280abf07e91N.exe N/A
File created C:\PROGRA~3\Mozilla\mkkxkvk.dll C:\PROGRA~3\Mozilla\yofzeuh.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\18d7281ad2a66b5f602ad32450e346b8baa3b8b07f7825192f46b280abf07e91N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\PROGRA~3\Mozilla\yofzeuh.exe N/A

Suspicious use of UnmapMainImage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\18d7281ad2a66b5f602ad32450e346b8baa3b8b07f7825192f46b280abf07e91N.exe N/A
N/A N/A C:\PROGRA~3\Mozilla\yofzeuh.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2032 wrote to memory of 2484 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\yofzeuh.exe
PID 2032 wrote to memory of 2484 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\yofzeuh.exe
PID 2032 wrote to memory of 2484 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\yofzeuh.exe
PID 2032 wrote to memory of 2484 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\yofzeuh.exe

Processes

C:\Users\Admin\AppData\Local\Temp\18d7281ad2a66b5f602ad32450e346b8baa3b8b07f7825192f46b280abf07e91N.exe

"C:\Users\Admin\AppData\Local\Temp\18d7281ad2a66b5f602ad32450e346b8baa3b8b07f7825192f46b280abf07e91N.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {A3B7E8FA-A069-41D3-9136-1C437787DD6A} S-1-5-18:NT AUTHORITY\System:Service:

C:\PROGRA~3\Mozilla\yofzeuh.exe

C:\PROGRA~3\Mozilla\yofzeuh.exe -qmgjyzc

Network

N/A

Files

memory/2640-0-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2640-1-0x0000000000460000-0x00000000004BC000-memory.dmp

memory/2640-2-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2640-4-0x0000000000400000-0x000000000045B000-memory.dmp

C:\PROGRA~3\Mozilla\yofzeuh.exe

MD5 939c2fda42b93abb2a68a5a2d0f60f2d
SHA1 ccbce1eb5b7748bac6a53a4509ed333d67c9f73b
SHA256 22b32af6fdda8a49d6b4d660780505dbefe524bfc1017498335c41c0d0b8d27b
SHA512 3d354412dc2d255f8691bb0df50b9d89b8cbc50e0df6dd8be58ddbd09107ce97e8497ac8914be8741a6630063ed487e46269549bb15805a0512ce2c9c6a72b65

memory/2484-7-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2484-8-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2484-10-0x0000000000400000-0x000000000045B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-09 22:48

Reported

2024-11-09 22:51

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

96s

Command Line

"C:\Users\Admin\AppData\Local\Temp\18d7281ad2a66b5f602ad32450e346b8baa3b8b07f7825192f46b280abf07e91N.exe"

Signatures

Event Triggered Execution: AppInit DLLs

persistence privilege_escalation

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\PROGRA~3\Mozilla\cwelzlb.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\PROGRA~3\Mozilla\cwelzlb.exe C:\Users\Admin\AppData\Local\Temp\18d7281ad2a66b5f602ad32450e346b8baa3b8b07f7825192f46b280abf07e91N.exe N/A
File created C:\PROGRA~3\Mozilla\ftyifzg.dll C:\PROGRA~3\Mozilla\cwelzlb.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\18d7281ad2a66b5f602ad32450e346b8baa3b8b07f7825192f46b280abf07e91N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\PROGRA~3\Mozilla\cwelzlb.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\18d7281ad2a66b5f602ad32450e346b8baa3b8b07f7825192f46b280abf07e91N.exe

"C:\Users\Admin\AppData\Local\Temp\18d7281ad2a66b5f602ad32450e346b8baa3b8b07f7825192f46b280abf07e91N.exe"

C:\PROGRA~3\Mozilla\cwelzlb.exe

C:\PROGRA~3\Mozilla\cwelzlb.exe -voeftbj

Network

Country Destination Domain Proto
US 8.8.8.8:53 100.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 68.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 75.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 75.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp

Files

memory/2332-0-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2332-1-0x0000000000560000-0x00000000005BC000-memory.dmp

memory/2332-2-0x0000000000400000-0x000000000045B000-memory.dmp

C:\ProgramData\Mozilla\cwelzlb.exe

MD5 61ca6ddfa059c2972cf67b69bb123735
SHA1 c7df778dd1307298b54115601903b9a08dfea763
SHA256 8bed7e08432f52a24852e7a6bfc8f1dc6e8ce1c8bbd098579a8e018110eaf38e
SHA512 ec63292d7871c8a531508a5a944d281e7221f0b975f8f2327b8059bab3d00a6e8fd51a374113d86acee0ab740c8f0f9e2dc0f331646a11df818f41ab33d3202d

memory/2332-6-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2332-8-0x0000000000560000-0x00000000005BC000-memory.dmp

memory/436-9-0x0000000000400000-0x000000000045B000-memory.dmp

memory/436-10-0x0000000000400000-0x000000000045B000-memory.dmp

memory/436-12-0x0000000000400000-0x000000000045B000-memory.dmp