Malware Analysis Report

2024-09-11 14:06

Sample ID 240615-fefwhsyhqd
Target XClient.exe
SHA256 e1a08988b3576c62be060b2b616d3ccae01e32484e5206e98cd18c00350f1042
Tags
xworm execution rat trojan
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

e1a08988b3576c62be060b2b616d3ccae01e32484e5206e98cd18c00350f1042

Threat Level: Known bad

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

Malicious Activity Summary

xworm execution rat trojan

Xworm

Xworm family

Detect Xworm Payload

Command and Scripting Interpreter: PowerShell

Executes dropped EXE

Looks up external IP address via web service

Unsigned PE

Enumerates physical storage devices

Uses Task Scheduler COM API

Creates scheduled task(s)

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Command and Scripting Interpreter
T1059
PowerShell
T1059.001
Scheduled Task/Job
T1053
Persistence
TA0003
Scheduled Task/Job
T1053
Privilege Escalation
TA0004
Scheduled Task/Job
T1053
Defense Evasion
TA0005
Credential Access
TA0006
Discovery
TA0007
System Information Discovery
T1082
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

2024-06-15 04:46

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

2024-06-15 04:46

Reported

2024-06-15 04:48

Platform

win11-20240611-en

Max time kernel

57s

Max time network

11s

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

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\rundll64.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

Creates scheduled task(s)

persistence
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:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
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:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A
Token: SeDebugPrivilege N/A C:\ProgramData\rundll64.exe 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 3460 wrote to memory of 1712 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3460 wrote to memory of 1712 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3460 wrote to memory of 3784 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3460 wrote to memory of 3784 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3460 wrote to memory of 3624 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3460 wrote to memory of 3624 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3460 wrote to memory of 4420 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3460 wrote to memory of 4420 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3460 wrote to memory of 1608 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\schtasks.exe
PID 3460 wrote to memory of 1608 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\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\XClient.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\rundll64.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'rundll64.exe'

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "rundll64" /tr "C:\ProgramData\rundll64.exe"

C:\ProgramData\rundll64.exe

C:\ProgramData\rundll64.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 1.112.95.208.in-addr.arpa udp
DE 93.127.192.2:443 nullbulge.se tcp

Files

memory/3460-0-0x00007FF92ECD3000-0x00007FF92ECD5000-memory.dmp

memory/3460-1-0x0000000000B90000-0x0000000000BA8000-memory.dmp

memory/3460-2-0x00007FF92ECD0000-0x00007FF92F792000-memory.dmp

memory/1712-3-0x00007FF92ECD0000-0x00007FF92F792000-memory.dmp

memory/1712-4-0x00000205B1EA0000-0x00000205B1EC2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vdbsgio1.x3j.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/1712-13-0x00007FF92ECD0000-0x00007FF92F792000-memory.dmp

memory/1712-14-0x00007FF92ECD0000-0x00007FF92F792000-memory.dmp

memory/1712-15-0x00007FF92ECD0000-0x00007FF92F792000-memory.dmp

memory/1712-18-0x00007FF92ECD0000-0x00007FF92F792000-memory.dmp

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

MD5 627073ee3ca9676911bee35548eff2b8
SHA1 4c4b68c65e2cab9864b51167d710aa29ebdcff2e
SHA256 85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c
SHA512 3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 1a9fa92a4f2e2ec9e244d43a6a4f8fb9
SHA1 9910190edfaccece1dfcc1d92e357772f5dae8f7
SHA256 0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888
SHA512 5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 856900844f6f1c326c89d0bcfb2f0c28
SHA1 1caad440d46fa8c0cbed4822b4be2bbdddba97c2
SHA256 ae24414ec53b3ae43ddbf1ff7b6643f8bf45281406f6415742f4305360d70a32
SHA512 ed8f421e151d797b33440dd0ddb6d6a5ec93fe7806ad82c60af3f77d545cf5dc319bce67804bd0613bb551a3f01648ec0d1918805dc7342145c8bb23ad12cab4

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 21017c68eaf9461301de459f4f07e888
SHA1 41ff30fc8446508d4c3407c79e798cf6eaa5bb73
SHA256 03b321e48ff3328d9c230308914961fe110c4c7bc96c0a85a296745437bcb888
SHA512 956990c11c6c1baa3665ef7ef23ef6073e0a7fcff77a93b5e605a83ff1e60b916d80d45dafb06977aed90868a273569a865cf2c623e295b5157bfff0fb2be35d

memory/3460-51-0x00007FF92ECD3000-0x00007FF92ECD5000-memory.dmp

memory/3460-52-0x00007FF92ECD0000-0x00007FF92F792000-memory.dmp

C:\ProgramData\rundll64.exe

MD5 77e09e515d37ed1137977c0e3474c2ab
SHA1 1f3ab7181f22723e75aaa8ff95fa273de71e0cf8
SHA256 e1a08988b3576c62be060b2b616d3ccae01e32484e5206e98cd18c00350f1042
SHA512 3365e00fad9daf82b9d984e5ff28702643d3468ef4a4abf9a3dc1abf2328f837e93a262314a7862a8dc814bb1279eb825e7877b2f2fbcbc11840224c470bb622