Malware Analysis Report

2024-09-11 13:53

Sample ID 240615-mztfns1gnk
Target rerdsa.exe
SHA256 150fb7fed020ccb73bcc45318b1b3ad5a53b61812187153c0a64e51eec05c432
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

150fb7fed020ccb73bcc45318b1b3ad5a53b61812187153c0a64e51eec05c432

Threat Level: Known bad

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

Malicious Activity Summary

xworm execution rat trojan

Detect Xworm Payload

Xworm family

Xworm

Command and Scripting Interpreter: PowerShell

Drops startup file

Checks computer location settings

Looks up external IP address via web service

Unsigned PE

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Command and Scripting Interpreter
T1059
PowerShell
T1059.001
Persistence
TA0003
Privilege Escalation
TA0004
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 10:54

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 10:54

Reported

2024-06-15 10:57

Platform

win7-20240508-en

Max time kernel

145s

Max time network

130s

Command Line

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

Signatures

Detect Xworm Payload

Description Indicator Process Target
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

Drops startup file

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

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2900 wrote to memory of 2496 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2900 wrote to memory of 2496 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2900 wrote to memory of 2496 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2900 wrote to memory of 2520 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2900 wrote to memory of 2520 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2900 wrote to memory of 2520 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2900 wrote to memory of 1288 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2900 wrote to memory of 1288 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2900 wrote to memory of 1288 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2900 wrote to memory of 2836 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2900 wrote to memory of 2836 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2900 wrote to memory of 2836 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

Processes

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

"C:\Users\Admin\AppData\Local\Temp\rerdsa.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\rerdsa.exe'

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 ip-api.com udp
N/A 127.0.0.1:23386 tcp
N/A 127.0.0.1:23386 tcp
N/A 127.0.0.1:23386 tcp
US 8.8.8.8:53 cameras-happen.gl.at.ply.gg udp
N/A 127.0.0.1:23386 tcp
N/A 127.0.0.1:23386 tcp
US 8.8.8.8:53 cameras-happen.gl.at.ply.gg udp
N/A 127.0.0.1:23386 tcp
N/A 127.0.0.1:23386 tcp
US 8.8.8.8:53 cameras-happen.gl.at.ply.gg udp
N/A 127.0.0.1:23386 tcp
N/A 127.0.0.1:23386 tcp

Files

memory/2900-0-0x000007FEF5353000-0x000007FEF5354000-memory.dmp

memory/2900-1-0x00000000011F0000-0x0000000001208000-memory.dmp

memory/2900-2-0x000007FEF5350000-0x000007FEF5D3C000-memory.dmp

memory/2900-3-0x000007FEF5353000-0x000007FEF5354000-memory.dmp

memory/2496-8-0x0000000001D50000-0x0000000001DD0000-memory.dmp

memory/2496-9-0x000000001B780000-0x000000001BA62000-memory.dmp

memory/2496-10-0x0000000001E90000-0x0000000001E98000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\R0DHO01UYGOWOEMESWBQ.temp

MD5 9b327b3268d63d905c3a0fffad4abd70
SHA1 8115da31c5605088e0d11ea6c6e10326197c305d
SHA256 49d92535b04f4e417a655c383e8b14397e51245a40ce21edf93e5d33d7e1834e
SHA512 f4717b3c1a1adafc683cf2ab1359ac098b820d9d1f6e45dfe53de52b99192c946732f304f18d94b5421d232aebb79136e84c70ec3c99d4ee8ee64bf40cb70c46

memory/2520-16-0x000000001B700000-0x000000001B9E2000-memory.dmp

memory/2520-17-0x0000000001D90000-0x0000000001D98000-memory.dmp

\??\PIPE\srvsvc

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

memory/2900-33-0x000007FEF5350000-0x000007FEF5D3C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-15 10:54

Reported

2024-06-15 10:57

Platform

win10v2004-20240508-en

Max time kernel

139s

Max time network

148s

Command Line

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

Signatures

Detect Xworm Payload

Description Indicator Process Target
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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\rerdsa.exe N/A

Drops startup file

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

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4576 wrote to memory of 316 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4576 wrote to memory of 316 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4576 wrote to memory of 4400 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4576 wrote to memory of 4400 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4576 wrote to memory of 1040 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4576 wrote to memory of 1040 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4576 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4576 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\rerdsa.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

Processes

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

"C:\Users\Admin\AppData\Local\Temp\rerdsa.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\rerdsa.exe'

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 ip-api.com udp
N/A 127.0.0.1:23386 tcp
N/A 127.0.0.1:23386 tcp
US 8.8.8.8:53 cameras-happen.gl.at.ply.gg udp
N/A 127.0.0.1:23386 tcp
N/A 127.0.0.1:23386 tcp
US 8.8.8.8:53 cameras-happen.gl.at.ply.gg udp
US 8.8.8.8:53 cameras-happen.gl.at.ply.gg udp
N/A 127.0.0.1:23386 tcp
N/A 127.0.0.1:23386 tcp
US 8.8.8.8:53 cameras-happen.gl.at.ply.gg udp

Files

memory/4576-1-0x0000000000F80000-0x0000000000F98000-memory.dmp

memory/4576-0-0x00007FFC35B73000-0x00007FFC35B75000-memory.dmp

memory/4576-2-0x00007FFC35B70000-0x00007FFC36631000-memory.dmp

memory/316-3-0x00007FFC35B70000-0x00007FFC36631000-memory.dmp

memory/316-4-0x00007FFC35B70000-0x00007FFC36631000-memory.dmp

memory/316-10-0x00000245E5FD0000-0x00000245E5FF2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bczgk23i.l01.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/316-15-0x00007FFC35B70000-0x00007FFC36631000-memory.dmp

memory/316-18-0x00007FFC35B70000-0x00007FFC36631000-memory.dmp

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

MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

MD5 6d3e9c29fe44e90aae6ed30ccf799ca8
SHA1 c7974ef72264bbdf13a2793ccf1aed11bc565dce
SHA256 2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d
SHA512 60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

MD5 cc19bcff372d20459d3651ba8aef50e7
SHA1 3c6f1d4cdd647864fb97a16b1aefba67fcee11f7
SHA256 366473e774d8976c7fd4dc582220666fb61a4feb3f7c95e69b2a68ad9e446ec9
SHA512 a0e360ca4b6e874fd44612bf4b17f3722c0619da4f6bade12a62efadae88c2d33460114eaafa2bc3fb1cef5bea07e745b8bee24f15d0cacaff5f4a521b225080

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

MD5 e3b6cc0fbea08a0831f0026a696db8b8
SHA1 4e32202d4700061cfd80d55e42798131c9f530d4
SHA256 3284cae7b82be99d93064390ba071ba4321f3f24dd21515b37b2ca9f31b2e8d5
SHA512 6a06856f360b48c8bc8a15ffb8d7a6604ec357bcb1d0fad5d71a2cb876929a7b67eb40ba4493998ab1bbae8cb71212e124276f27d5c138a135041c27a41a0b7a

memory/4576-57-0x00007FFC35B70000-0x00007FFC36631000-memory.dmp