Malware Analysis Report

2024-09-11 03:38

Sample ID 240614-zs963awarc
Target grafler.exe
SHA256 105e3099c7568b5e916e293750666d65dc35101ded8f76bdca82dfa4505334bd
Tags
discovery exploit
score
8/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
8/10

SHA256

105e3099c7568b5e916e293750666d65dc35101ded8f76bdca82dfa4505334bd

Threat Level: Likely malicious

The file grafler.exe was found to be: Likely malicious.

Malicious Activity Summary

discovery exploit

Possible privilege escalation attempt

Modifies file permissions

Unsigned PE

Uses Task Scheduler COM API

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Scheduled Task/Job
T1053
Persistence
TA0003
Scheduled Task/Job
T1053
Privilege Escalation
TA0004
Scheduled Task/Job
T1053
Defense Evasion
TA0005
File and Directory Permissions Modification
T1222
Credential Access
TA0006
Discovery
TA0007
Query Registry
T1012
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-14 21:00

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-14 21:00

Reported

2024-06-14 21:00

Platform

win10v2004-20240508-en

Max time kernel

32s

Max time network

35s

Command Line

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

Signatures

Possible privilege escalation attempt

exploit
Description Indicator Process Target
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A

Modifies file permissions

discovery
Description Indicator Process Target
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\system32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeTakeOwnershipPrivilege N/A C:\Windows\system32\takeown.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 5060 wrote to memory of 2524 N/A C:\Users\Admin\AppData\Local\Temp\grafler.exe C:\Windows\system32\cmd.exe
PID 5060 wrote to memory of 2524 N/A C:\Users\Admin\AppData\Local\Temp\grafler.exe C:\Windows\system32\cmd.exe
PID 2524 wrote to memory of 1412 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\takeown.exe
PID 2524 wrote to memory of 1412 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\takeown.exe
PID 5060 wrote to memory of 4500 N/A C:\Users\Admin\AppData\Local\Temp\grafler.exe C:\Windows\system32\cmd.exe
PID 5060 wrote to memory of 4500 N/A C:\Users\Admin\AppData\Local\Temp\grafler.exe C:\Windows\system32\cmd.exe
PID 4500 wrote to memory of 2404 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\icacls.exe
PID 4500 wrote to memory of 2404 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\icacls.exe
PID 5060 wrote to memory of 5088 N/A C:\Users\Admin\AppData\Local\Temp\grafler.exe C:\Windows\system32\cmd.exe
PID 5060 wrote to memory of 5088 N/A C:\Users\Admin\AppData\Local\Temp\grafler.exe C:\Windows\system32\cmd.exe
PID 5088 wrote to memory of 1708 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\schtasks.exe
PID 5088 wrote to memory of 1708 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c takeown /f C:\Windows\System32\taskmgr.exe

C:\Windows\system32\takeown.exe

takeown /f C:\Windows\System32\taskmgr.exe

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c icacls C:\Windows\System32\taskmgr.exe /grant administrators:F

C:\Windows\system32\icacls.exe

icacls C:\Windows\System32\taskmgr.exe /grant administrators:F

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c schtasks /create /tn "UpdateSvc" /tr "C:\Users\Admin\AppData\Local\Temp\doppel.exe" /sc onstart

C:\Windows\system32\schtasks.exe

schtasks /create /tn "UpdateSvc" /tr "C:\Users\Admin\AppData\Local\Temp\doppel.exe" /sc onstart

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp

Files

N/A