Malware Analysis Report

2024-10-16 06:27

Sample ID 210831-nsg336ve9e
Target scheduler_a.dll
SHA256 8f7e023dc4dbcdc54eb908b7c1c752a0a1f29bb6521686376f968090549e653e
Tags
ta505 upx
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

8f7e023dc4dbcdc54eb908b7c1c752a0a1f29bb6521686376f968090549e653e

Threat Level: Known bad

The file scheduler_a.dll was found to be: Known bad.

Malicious Activity Summary

ta505 upx

TA505

UPX packed file

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2021-08-31 13:13

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-08-31 13:13

Reported

2021-08-31 13:17

Platform

win7v20210408

Max time kernel

125s

Max time network

157s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\scheduler_a.dll,#1

Signatures

TA505

ta505

UPX packed file

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

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1920 wrote to memory of 1224 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1920 wrote to memory of 1224 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1920 wrote to memory of 1224 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1920 wrote to memory of 1224 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1920 wrote to memory of 1224 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1920 wrote to memory of 1224 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1920 wrote to memory of 1224 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\scheduler_a.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\scheduler_a.dll,#1

Network

Country Destination Domain Proto
N/A 8.8.8.8:53 microsoft-hub-us.com udp

Files

memory/1224-60-0x0000000000000000-mapping.dmp

memory/1224-61-0x0000000076691000-0x0000000076693000-memory.dmp

memory/1224-62-0x0000000000170000-0x0000000000171000-memory.dmp

memory/1224-63-0x0000000010000000-0x0000000012044000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2021-08-31 13:13

Reported

2021-08-31 13:16

Platform

win10v20210410

Max time kernel

13s

Max time network

122s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\scheduler_a.dll,#1

Signatures

TA505

ta505

UPX packed file

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

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3168 wrote to memory of 4000 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3168 wrote to memory of 4000 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3168 wrote to memory of 4000 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\scheduler_a.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\scheduler_a.dll,#1

Network

Country Destination Domain Proto
N/A 8.8.8.8:53 microsoft-hub-us.com udp

Files

memory/4000-114-0x0000000000000000-mapping.dmp

memory/4000-115-0x0000000000590000-0x00000000006DA000-memory.dmp

memory/4000-116-0x0000000010000000-0x0000000012044000-memory.dmp