Malware Analysis Report

2024-11-16 13:30

Sample ID 240621-2228xsvanc
Target XClient.exe
SHA256 da823b302bfe968cb38012247306efe78d3de49dfd2e46988222edd92bae4599
Tags
xworm persistence rat trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

da823b302bfe968cb38012247306efe78d3de49dfd2e46988222edd92bae4599

Threat Level: Known bad

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

Malicious Activity Summary

xworm persistence rat trojan

Detect Xworm Payload

Xworm

Xworm family

Drops startup file

Checks computer location settings

Executes dropped EXE

Adds Run key to start application

Looks up external IP address via web service

Unsigned PE

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Scheduled Task/Job: Scheduled Task

Uses Task Scheduler COM API

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-21 23:05

Signatures

Detect Xworm Payload

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

Xworm family

xworm

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-21 23:05

Reported

2024-06-21 23:08

Platform

win7-20231129-en

Max time kernel

146s

Max time network

149s

Command Line

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

Signatures

Detect Xworm Payload

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

Xworm

trojan rat xworm

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\svchost N/A
N/A N/A C:\ProgramData\svchost N/A
N/A N/A C:\ProgramData\svchost N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost" C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Looks up external IP address via web service

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

Enumerates physical storage devices

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A
Token: SeDebugPrivilege N/A C:\ProgramData\svchost N/A
Token: SeDebugPrivilege N/A C:\ProgramData\svchost N/A
Token: SeDebugPrivilege N/A C:\ProgramData\svchost N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\System32\schtasks.exe

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

C:\Windows\system32\taskeng.exe

taskeng.exe {8BBA8C58-6A21-4C06-AA1D-007FCF317FAC} S-1-5-21-3627615824-4061627003-3019543961-1000:SCFGBRBT\Admin:Interactive:[1]

C:\ProgramData\svchost

C:\ProgramData\svchost

C:\ProgramData\svchost

C:\ProgramData\svchost

C:\ProgramData\svchost

C:\ProgramData\svchost

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 runderscore00-25851.portmap.host udp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp

Files

memory/2168-0-0x000007FEF5A83000-0x000007FEF5A84000-memory.dmp

memory/2168-1-0x0000000000320000-0x0000000000338000-memory.dmp

memory/2168-2-0x000007FEF5A80000-0x000007FEF646C000-memory.dmp

C:\ProgramData\svchost

MD5 b82626cc0347f048f8da43fb67033b74
SHA1 2a5ea2cc17682a0750b4d9f9ab84c53e20ab49c9
SHA256 da823b302bfe968cb38012247306efe78d3de49dfd2e46988222edd92bae4599
SHA512 434d1d159ef525ca5fce31d88499cce87e1d9620c906f465e245a711a6f44b6c85838d87d4c76f4efd2ae4364be3fdbb51e4e262dd3eab12b7ac0c528b8d123a

memory/2620-9-0x0000000000A70000-0x0000000000A88000-memory.dmp

memory/2168-10-0x000007FEF5A83000-0x000007FEF5A84000-memory.dmp

memory/2168-11-0x000007FEF5A80000-0x000007FEF646C000-memory.dmp

memory/2000-14-0x0000000001170000-0x0000000001188000-memory.dmp

memory/764-16-0x00000000002A0000-0x00000000002B8000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-21 23:05

Reported

2024-06-21 23:08

Platform

win10v2004-20240611-en

Max time kernel

142s

Max time network

149s

Command Line

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

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A
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-1-5-21-2447855248-390457009-3660902674-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\svchost N/A
N/A N/A C:\ProgramData\svchost N/A
N/A N/A C:\ProgramData\svchost N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2447855248-390457009-3660902674-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost" C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Looks up external IP address via web service

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

Enumerates physical storage devices

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A
Token: SeDebugPrivilege N/A C:\ProgramData\svchost N/A
Token: SeDebugPrivilege N/A C:\ProgramData\svchost N/A
Token: SeDebugPrivilege N/A C:\ProgramData\svchost N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1628 wrote to memory of 1924 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\schtasks.exe
PID 1628 wrote to memory of 1924 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\System32\schtasks.exe

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

C:\ProgramData\svchost

C:\ProgramData\svchost

C:\ProgramData\svchost

C:\ProgramData\svchost

C:\ProgramData\svchost

C:\ProgramData\svchost

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.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 runderscore00-25851.portmap.host udp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 57.15.31.184.in-addr.arpa udp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp
DE 193.161.193.99:25851 runderscore00-25851.portmap.host tcp

Files

memory/1628-0-0x00007FFB0C4F3000-0x00007FFB0C4F5000-memory.dmp

memory/1628-1-0x0000000000CB0000-0x0000000000CC8000-memory.dmp

memory/1628-2-0x00007FFB0C4F0000-0x00007FFB0CFB1000-memory.dmp

C:\ProgramData\svchost

MD5 b82626cc0347f048f8da43fb67033b74
SHA1 2a5ea2cc17682a0750b4d9f9ab84c53e20ab49c9
SHA256 da823b302bfe968cb38012247306efe78d3de49dfd2e46988222edd92bae4599
SHA512 434d1d159ef525ca5fce31d88499cce87e1d9620c906f465e245a711a6f44b6c85838d87d4c76f4efd2ae4364be3fdbb51e4e262dd3eab12b7ac0c528b8d123a

memory/1628-8-0x00007FFB0C4F3000-0x00007FFB0C4F5000-memory.dmp

memory/4260-9-0x00007FFB0C4F0000-0x00007FFB0CFB1000-memory.dmp

memory/4260-11-0x00007FFB0C4F0000-0x00007FFB0CFB1000-memory.dmp

memory/1628-12-0x00007FFB0C4F0000-0x00007FFB0CFB1000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\svchost.log

MD5 2ff39f6c7249774be85fd60a8f9a245e
SHA1 684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA256 e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
SHA512 1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1