Malware Analysis Report

2024-09-22 06:59

Sample ID 240621-nbgmmsxcrf
Target Dllhost.exe
SHA256 503a126804af61976611e4fa3f4991a2e3c6741029a6ac8aa2c5411a192f2115
Tags
rat default asyncrat
score
10/10

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
10/10

SHA256

503a126804af61976611e4fa3f4991a2e3c6741029a6ac8aa2c5411a192f2115

Threat Level: Known bad

The file Dllhost.exe was found to be: Known bad.

Malicious Activity Summary

rat default asyncrat

Async RAT payload

Asyncrat family

AsyncRat

Async RAT payload

Executes dropped EXE

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Scheduled Task/Job: Scheduled Task

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Delays execution with timeout.exe

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-21 11:13

Signatures

Async RAT payload

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

Asyncrat family

asyncrat

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-21 11:13

Reported

2024-06-21 11:15

Platform

win10-20240404-en

Max time kernel

133s

Max time network

135s

Command Line

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

Signatures

AsyncRat

rat asyncrat

Async RAT payload

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SolaraUpdateHoster.exe N/A

Enumerates physical storage devices

Delays execution with timeout.exe

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

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Dllhost.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SolaraUpdateHoster.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SolaraUpdateHoster.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4092 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\Dllhost.exe C:\Windows\SysWOW64\cmd.exe
PID 4092 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\Dllhost.exe C:\Windows\SysWOW64\cmd.exe
PID 4092 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\Dllhost.exe C:\Windows\SysWOW64\cmd.exe
PID 4092 wrote to memory of 4308 N/A C:\Users\Admin\AppData\Local\Temp\Dllhost.exe C:\Windows\SysWOW64\cmd.exe
PID 4092 wrote to memory of 4308 N/A C:\Users\Admin\AppData\Local\Temp\Dllhost.exe C:\Windows\SysWOW64\cmd.exe
PID 4092 wrote to memory of 4308 N/A C:\Users\Admin\AppData\Local\Temp\Dllhost.exe C:\Windows\SysWOW64\cmd.exe
PID 4308 wrote to memory of 3240 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4308 wrote to memory of 3240 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4308 wrote to memory of 3240 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4596 wrote to memory of 1856 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 4596 wrote to memory of 1856 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 4596 wrote to memory of 1856 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 4308 wrote to memory of 3800 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\SolaraUpdateHoster.exe
PID 4308 wrote to memory of 3800 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\SolaraUpdateHoster.exe
PID 4308 wrote to memory of 3800 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\SolaraUpdateHoster.exe

Processes

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

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

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "SolaraUpdateHoster" /tr '"C:\Users\Admin\AppData\Roaming\SolaraUpdateHoster.exe"' & exit

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6FE0.tmp.bat""

C:\Windows\SysWOW64\timeout.exe

timeout 3

C:\Windows\SysWOW64\schtasks.exe

schtasks /create /f /sc onlogon /rl highest /tn "SolaraUpdateHoster" /tr '"C:\Users\Admin\AppData\Roaming\SolaraUpdateHoster.exe"'

C:\Users\Admin\AppData\Roaming\SolaraUpdateHoster.exe

"C:\Users\Admin\AppData\Roaming\SolaraUpdateHoster.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 carolina-reverse.gl.at.ply.gg udp
US 147.185.221.20:34609 carolina-reverse.gl.at.ply.gg tcp
US 8.8.8.8:53 20.221.185.147.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 147.185.221.20:34609 carolina-reverse.gl.at.ply.gg tcp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 30.73.42.20.in-addr.arpa udp

Files

memory/4092-0-0x0000000073A0E000-0x0000000073A0F000-memory.dmp

memory/4092-1-0x0000000000070000-0x0000000000082000-memory.dmp

memory/4092-2-0x0000000073A00000-0x00000000740EE000-memory.dmp

memory/4092-3-0x0000000004860000-0x00000000048C6000-memory.dmp

memory/4092-4-0x0000000004D30000-0x0000000004DCC000-memory.dmp

memory/4092-9-0x0000000073A00000-0x00000000740EE000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp6FE0.tmp.bat

MD5 d80286cd1d92e7638f2081497541bff7
SHA1 483d8704f1c984649622bd8caa9b10d243bddb3f
SHA256 4c3d0069686ceffbaec6a47b51dd855f371c7e5b4cb504c07f68190fd804c20d
SHA512 ffac814581c3e74fca6edf01d332f58fcca6b2f9e7e9663f28cde7a562df284020e07cc24da7f0b301165144c381c8a6c7197ee02ab69ae89097ce9a0fba46c1

C:\Users\Admin\AppData\Roaming\SolaraUpdateHoster.exe

MD5 44359c5e869c44100cfe1dd316d4f0a2
SHA1 26f8aed6286f69c9d9884ffa1c81d931b77e94c1
SHA256 503a126804af61976611e4fa3f4991a2e3c6741029a6ac8aa2c5411a192f2115
SHA512 e3edb5700da4b86ee0ff0e5ba2aff9b2fc2b5107c449cef301c8a6117eaef68ef7b2778d20e7c03a80a44023638faf5a3f5a8536f09996bb1e88fef4ea641210

memory/3800-16-0x0000000006320000-0x000000000681E000-memory.dmp

memory/3800-17-0x0000000006B20000-0x0000000006B96000-memory.dmp

memory/3800-18-0x0000000006AB0000-0x0000000006B14000-memory.dmp

memory/3800-19-0x0000000006C10000-0x0000000006C2E000-memory.dmp