Malware Analysis Report

2024-09-11 15:00

Sample ID 240609-zerskafd56
Target install.bat
SHA256 be8b784930db373c77c4af35def8dd62bab00b25e7980a2198e6292610074aa6
Tags
xworm persistence rat trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

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

be8b784930db373c77c4af35def8dd62bab00b25e7980a2198e6292610074aa6

Threat Level: Known bad

The file install.bat was found to be: Known bad.

Malicious Activity Summary

xworm persistence rat trojan

Detect Xworm Payload

Xworm

Executes dropped EXE

Checks computer location settings

Looks up external IP address via web service

Adds Run key to start application

Suspicious use of SetThreadContext

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-09 20:38

Signatures

Unsigned PE

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

Analysis: behavioral3

Detonation Overview

Submitted

2024-06-09 20:38

Reported

2024-06-09 20:38

Platform

win10v2004-20240226-en

Max time kernel

30s

Max time network

34s

Command Line

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

Signatures

Detect Xworm Payload

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

Xworm

trojan rat xworm

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\install.exe N/A

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Service = "C:\\ProgramData\\Service.exe" C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4196 set thread context of 4100 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

Enumerates physical storage devices

Creates scheduled task(s)

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

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3672 wrote to memory of 4196 N/A C:\Users\Admin\AppData\Local\Temp\install.exe C:\Users\Admin\AppData\LocalefUjwRZZGA.exe
PID 3672 wrote to memory of 4196 N/A C:\Users\Admin\AppData\Local\Temp\install.exe C:\Users\Admin\AppData\LocalefUjwRZZGA.exe
PID 4196 wrote to memory of 4100 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 4196 wrote to memory of 4100 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 4196 wrote to memory of 4100 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 4196 wrote to memory of 4100 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 4196 wrote to memory of 4100 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 4196 wrote to memory of 4100 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 4196 wrote to memory of 4100 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 4196 wrote to memory of 4100 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 4100 wrote to memory of 3788 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe C:\Windows\SysWOW64\schtasks.exe
PID 4100 wrote to memory of 3788 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe C:\Windows\SysWOW64\schtasks.exe
PID 4100 wrote to memory of 3788 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe C:\Windows\SysWOW64\schtasks.exe

Processes

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

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

C:\Users\Admin\AppData\LocalefUjwRZZGA.exe

"C:\Users\Admin\AppData\LocalefUjwRZZGA.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"

C:\Windows\SysWOW64\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Service" /tr "C:\ProgramData\Service.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 1.112.95.208.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
GB 96.16.110.114:80 tcp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 h2cker.ddns.net udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp

Files

memory/3672-0-0x00007FF894515000-0x00007FF894516000-memory.dmp

memory/3672-1-0x00007FF894260000-0x00007FF894C01000-memory.dmp

memory/3672-2-0x00007FF894260000-0x00007FF894C01000-memory.dmp

C:\Users\Admin\AppData\LocalefUjwRZZGA.exe

MD5 d0d7e34964fdf38d5465e5e3bad009fd
SHA1 dd081d07172fd96326a810ca2f93fed0eed0e086
SHA256 54f2e357163305a265fd3cbd6bc287c1338e691a4e6975e1e9631b0ebddb920a
SHA512 b9e81cc19b7b539fd74540a616876586d73bcc24a92d4ac9ccb552a51056832a22497ab6ef23b48360213dd8beeebcdf5fcbcc5ef96d2e050b974f416d60b7ee

C:\Users\Admin\AppData\LocalUMDWjUBbvf.exe

MD5 bd5ca3638a485637b6d24dbf73de9fe8
SHA1 afe95ea71ac7c16f0c12f44b20dde34d8eb8b0c3
SHA256 cbd4cd8faf323e43498462325d242d54b52b60550629491d118fbbc31fd64594
SHA512 021f335e3f8ede8375fef50310a87ec54395f4392bbf95dec0cc2b7ef386ee3be6aae992fcae2236b5d25f2a4cadc2fb3333eda16dc6b1b8a65a937ebafb1884

memory/4196-21-0x00007FF891CD3000-0x00007FF891CD5000-memory.dmp

memory/4196-23-0x0000000000D90000-0x0000000000DBC000-memory.dmp

memory/4196-25-0x0000000002F10000-0x0000000002F1C000-memory.dmp

memory/3672-27-0x00007FF894260000-0x00007FF894C01000-memory.dmp

memory/4196-28-0x00007FF891CD0000-0x00007FF892791000-memory.dmp

memory/4196-31-0x00007FF891CD0000-0x00007FF892791000-memory.dmp

memory/4100-32-0x00000000003A0000-0x00000000003B0000-memory.dmp

memory/4100-33-0x0000000004C60000-0x0000000004CFC000-memory.dmp

memory/4100-34-0x0000000004D00000-0x0000000004D66000-memory.dmp

Analysis: behavioral4

Detonation Overview

Submitted

2024-06-09 20:38

Reported

2024-06-09 20:38

Platform

win11-20240426-en

Max time kernel

28s

Max time network

16s

Command Line

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

Signatures

Detect Xworm Payload

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

Xworm

trojan rat xworm

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3062789476-783164490-2318012559-1000\Software\Microsoft\Windows\CurrentVersion\Run\Service = "C:\\ProgramData\\Service.exe" C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1664 set thread context of 4116 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

Enumerates physical storage devices

Creates scheduled task(s)

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

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4548 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\install.exe C:\Users\Admin\AppData\LocalefUjwRZZGA.exe
PID 4548 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\install.exe C:\Users\Admin\AppData\LocalefUjwRZZGA.exe
PID 1664 wrote to memory of 4116 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1664 wrote to memory of 4116 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1664 wrote to memory of 4116 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1664 wrote to memory of 4116 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1664 wrote to memory of 4116 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1664 wrote to memory of 4116 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1664 wrote to memory of 4116 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1664 wrote to memory of 4116 N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 4116 wrote to memory of 4268 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe C:\Windows\SysWOW64\schtasks.exe
PID 4116 wrote to memory of 4268 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe C:\Windows\SysWOW64\schtasks.exe
PID 4116 wrote to memory of 4268 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe C:\Windows\SysWOW64\schtasks.exe

Processes

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

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

C:\Users\Admin\AppData\LocalefUjwRZZGA.exe

"C:\Users\Admin\AppData\LocalefUjwRZZGA.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"

C:\Windows\SysWOW64\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Service" /tr "C:\ProgramData\Service.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 208.95.112.1:80 ip-api.com tcp

Files

memory/4548-0-0x00007FFF1E285000-0x00007FFF1E286000-memory.dmp

memory/4548-1-0x00007FFF1DFD0000-0x00007FFF1E971000-memory.dmp

memory/4548-3-0x00007FFF1DFD0000-0x00007FFF1E971000-memory.dmp

C:\Users\Admin\AppData\LocalefUjwRZZGA.exe

MD5 d0d7e34964fdf38d5465e5e3bad009fd
SHA1 dd081d07172fd96326a810ca2f93fed0eed0e086
SHA256 54f2e357163305a265fd3cbd6bc287c1338e691a4e6975e1e9631b0ebddb920a
SHA512 b9e81cc19b7b539fd74540a616876586d73bcc24a92d4ac9ccb552a51056832a22497ab6ef23b48360213dd8beeebcdf5fcbcc5ef96d2e050b974f416d60b7ee

memory/1664-14-0x00007FFF1BBD3000-0x00007FFF1BBD5000-memory.dmp

memory/1664-15-0x0000000000340000-0x000000000036C000-memory.dmp

C:\Users\Admin\AppData\LocalUMDWjUBbvf.exe

MD5 bd5ca3638a485637b6d24dbf73de9fe8
SHA1 afe95ea71ac7c16f0c12f44b20dde34d8eb8b0c3
SHA256 cbd4cd8faf323e43498462325d242d54b52b60550629491d118fbbc31fd64594
SHA512 021f335e3f8ede8375fef50310a87ec54395f4392bbf95dec0cc2b7ef386ee3be6aae992fcae2236b5d25f2a4cadc2fb3333eda16dc6b1b8a65a937ebafb1884

memory/1664-26-0x000000001AE20000-0x000000001AE2C000-memory.dmp

memory/4548-27-0x00007FFF1DFD0000-0x00007FFF1E971000-memory.dmp

memory/1664-28-0x00007FFF1BBD0000-0x00007FFF1C692000-memory.dmp

memory/4116-29-0x0000000000400000-0x0000000000410000-memory.dmp

memory/1664-31-0x00007FFF1BBD0000-0x00007FFF1C692000-memory.dmp

memory/4116-32-0x0000000004E90000-0x0000000004F2C000-memory.dmp

memory/4116-33-0x0000000004F30000-0x0000000004F96000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-09 20:38

Reported

2024-06-09 20:38

Platform

win10-20240404-en

Max time kernel

27s

Max time network

20s

Command Line

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

Signatures

Executes dropped EXE

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

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4568 wrote to memory of 3916 N/A C:\Users\Admin\AppData\Local\Temp\install.exe C:\Users\Admin\AppData\LocalefUjwRZZGA.exe
PID 4568 wrote to memory of 3916 N/A C:\Users\Admin\AppData\Local\Temp\install.exe C:\Users\Admin\AppData\LocalefUjwRZZGA.exe

Processes

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

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

C:\Users\Admin\AppData\LocalefUjwRZZGA.exe

"C:\Users\Admin\AppData\LocalefUjwRZZGA.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 66.43.201.23.in-addr.arpa udp

Files

memory/4568-0-0x00007FFA7F190000-0x00007FFA7F36B000-memory.dmp

memory/4568-1-0x00007FFA7F190000-0x00007FFA7F36B000-memory.dmp

memory/4568-2-0x00007FFA7F190000-0x00007FFA7F36B000-memory.dmp

C:\Users\Admin\AppData\LocalefUjwRZZGA.exe

MD5 d0d7e34964fdf38d5465e5e3bad009fd
SHA1 dd081d07172fd96326a810ca2f93fed0eed0e086
SHA256 54f2e357163305a265fd3cbd6bc287c1338e691a4e6975e1e9631b0ebddb920a
SHA512 b9e81cc19b7b539fd74540a616876586d73bcc24a92d4ac9ccb552a51056832a22497ab6ef23b48360213dd8beeebcdf5fcbcc5ef96d2e050b974f416d60b7ee

memory/3916-14-0x00007FFA7F190000-0x00007FFA7F36B000-memory.dmp

memory/4568-15-0x00007FFA7F190000-0x00007FFA7F36B000-memory.dmp

memory/3916-12-0x0000000000680000-0x00000000006AC000-memory.dmp

memory/3916-16-0x00000000026E0000-0x00000000026EC000-memory.dmp

memory/3916-17-0x00007FFA7F190000-0x00007FFA7F36B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-09 20:38

Reported

2024-06-09 20:38

Platform

win7-20240221-en

Max time kernel

23s

Max time network

16s

Command Line

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

Signatures

Executes dropped EXE

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

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\LocalefUjwRZZGA.exe N/A

Processes

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

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

C:\Users\Admin\AppData\LocalefUjwRZZGA.exe

"C:\Users\Admin\AppData\LocalefUjwRZZGA.exe"

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe -u -p 2152 -s 6852

Network

N/A

Files

memory/1912-0-0x000007FEF5F7E000-0x000007FEF5F7F000-memory.dmp

C:\Users\Admin\AppData\LocalefUjwRZZGA.exe

MD5 d0d7e34964fdf38d5465e5e3bad009fd
SHA1 dd081d07172fd96326a810ca2f93fed0eed0e086
SHA256 54f2e357163305a265fd3cbd6bc287c1338e691a4e6975e1e9631b0ebddb920a
SHA512 b9e81cc19b7b539fd74540a616876586d73bcc24a92d4ac9ccb552a51056832a22497ab6ef23b48360213dd8beeebcdf5fcbcc5ef96d2e050b974f416d60b7ee

memory/1912-9-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

memory/2152-10-0x000007FEF3833000-0x000007FEF3834000-memory.dmp

memory/2152-11-0x0000000000A90000-0x0000000000ABC000-memory.dmp

memory/2152-12-0x0000000000240000-0x000000000024C000-memory.dmp

memory/2152-13-0x000007FEF3833000-0x000007FEF3834000-memory.dmp