Malware Analysis Report

2025-01-22 20:39

Sample ID 241019-yeyqfaxalm
Target Turkcell_Fatura_7891802.rar
SHA256 0a83cd319702b5f50d699adbb5badb6731879d59df5d8255c623c21e67359ea6
Tags
defense_evasion discovery evasion execution impact persistence ransomware trojan
score
9/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
9/10

SHA256

0a83cd319702b5f50d699adbb5badb6731879d59df5d8255c623c21e67359ea6

Threat Level: Likely malicious

The file Turkcell_Fatura_7891802.rar was found to be: Likely malicious.

Malicious Activity Summary

defense_evasion discovery evasion execution impact persistence ransomware trojan

Deletes shadow copies

Adds Run key to start application

Checks whether UAC is enabled

Suspicious use of SetThreadContext

Drops file in Windows directory

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

Interacts with shadow copies

Modifies Internet Explorer Phishing Filter

Suspicious use of AdjustPrivilegeToken

Uses Volume Shadow Copy service COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-19 19:42

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-19 19:42

Reported

2024-10-19 19:42

Platform

win10v2004-20241007-en

Max time kernel

0s

Max time network

6s

Command Line

N/A

Signatures

N/A

Processes

N/A

Network

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-19 19:42

Reported

2024-10-19 19:45

Platform

win7-20240708-en

Max time kernel

149s

Max time network

145s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe"

Signatures

Deletes shadow copies

ransomware defense_evasion impact execution

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\qmelumif = "\"C:\\Windows\\gxahefel.exe\"" C:\Windows\SysWOW64\explorer.exe N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\gxahefel.exe C:\Windows\SysWOW64\explorer.exe N/A
File opened for modification C:\Windows\gxahefel.exe C:\Windows\SysWOW64\explorer.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\vssadmin.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\explorer.exe N/A

Interacts with shadow copies

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\vssadmin.exe N/A

Modifies Internet Explorer Phishing Filter

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Internet Explorer\PhishingFilter C:\Windows\SysWOW64\explorer.exe N/A
Set value (int) \REGISTRY\USER\S-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV8 = "0" C:\Windows\SysWOW64\explorer.exe N/A
Set value (int) \REGISTRY\USER\S-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV9 = "0" C:\Windows\SysWOW64\explorer.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeAuditPrivilege N/A C:\Windows\system32\vssvc.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2396 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe
PID 2396 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe
PID 2396 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe
PID 2396 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe
PID 2396 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe
PID 2396 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe
PID 2360 wrote to memory of 2168 N/A C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe C:\Windows\SysWOW64\explorer.exe
PID 2360 wrote to memory of 2168 N/A C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe C:\Windows\SysWOW64\explorer.exe
PID 2360 wrote to memory of 2168 N/A C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe C:\Windows\SysWOW64\explorer.exe
PID 2360 wrote to memory of 2168 N/A C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe C:\Windows\SysWOW64\explorer.exe
PID 2360 wrote to memory of 2168 N/A C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe C:\Windows\SysWOW64\explorer.exe
PID 2168 wrote to memory of 2960 N/A C:\Windows\SysWOW64\explorer.exe C:\Windows\SysWOW64\vssadmin.exe
PID 2168 wrote to memory of 2960 N/A C:\Windows\SysWOW64\explorer.exe C:\Windows\SysWOW64\vssadmin.exe
PID 2168 wrote to memory of 2960 N/A C:\Windows\SysWOW64\explorer.exe C:\Windows\SysWOW64\vssadmin.exe
PID 2168 wrote to memory of 2960 N/A C:\Windows\SysWOW64\explorer.exe C:\Windows\SysWOW64\vssadmin.exe

Uses Volume Shadow Copy service COM API

ransomware

Processes

C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe

"C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe"

C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe

"C:\Users\Admin\AppData\Local\Temp\Turkcell_Fatura_789180\Turkcell_Fatura_789180.exe"

C:\Windows\SysWOW64\explorer.exe

"C:\Windows\system32\explorer.exe"

C:\Windows\SysWOW64\vssadmin.exe

vssadmin.exe Delete Shadows /All /Quiet

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 yourdatamydata.ru udp

Files

memory/2396-0-0x00000000001C0000-0x00000000001C1000-memory.dmp

memory/2396-1-0x0000000000270000-0x0000000000276000-memory.dmp

memory/2360-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2360-4-0x0000000000400000-0x000000000043A000-memory.dmp

memory/2360-9-0x0000000000400000-0x000000000043A000-memory.dmp

memory/2396-7-0x0000000000400000-0x00000000004A8000-memory.dmp

memory/2360-10-0x0000000000400000-0x000000000043A000-memory.dmp

memory/2360-8-0x0000000000400000-0x000000000043A000-memory.dmp

memory/2168-13-0x0000000000080000-0x00000000000BC000-memory.dmp

memory/2168-12-0x0000000000080000-0x00000000000BC000-memory.dmp

memory/2360-17-0x0000000000400000-0x000000000043A000-memory.dmp

C:\ProgramData\utoligapetoqemaz\01000000

MD5 fc49ef25f69c8caa07c4005db8c8d650
SHA1 8d071de105f28257f0300d5c78cb15aeecd28126
SHA256 60343f8740638b2ff270829b178973905482f2cab48bfb17b83061cf6484f569
SHA512 604190ed026bb8f1fdc469fcc602275f6d071761459a151914be8cf1f4711a192f92529bb1ce60b69a76ff823545c47febd9899a54115cfa1a63c5d1629c25bf

memory/2168-21-0x0000000000080000-0x00000000000BC000-memory.dmp

memory/2168-24-0x0000000000080000-0x00000000000BC000-memory.dmp