Malware Analysis Report

2024-11-16 13:40

Sample ID 240531-pv3jwshg45
Target rew.exe
SHA256 20f4a10545e41b42ac85fff035062ab142a5007e473626ed85c45b2e54402a63
Tags
xworm execution persistence rat trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

20f4a10545e41b42ac85fff035062ab142a5007e473626ed85c45b2e54402a63

Threat Level: Known bad

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

Malicious Activity Summary

xworm execution persistence rat trojan

Xworm family

Detect Xworm Payload

Xworm

Command and Scripting Interpreter: PowerShell

Checks computer location settings

Drops startup file

Adds Run key to start application

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-31 12:39

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: behavioral2

Detonation Overview

Submitted

2024-05-31 12:39

Reported

2024-05-31 12:42

Platform

win10v2004-20240508-en

Max time kernel

142s

Max time network

136s

Command Line

"C:\Users\Admin\AppData\Local\Temp\rew.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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\rew.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\rew.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\rew.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe" C:\Users\Admin\AppData\Local\Temp\rew.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of SetWindowsHookEx

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

Processes

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

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

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'rew.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 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 85.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
N/A 127.0.0.1:4328 tcp
US 8.8.8.8:53 20.ip.gl.ply.gg udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 20.ip.gl.ply.gg udp
N/A 127.0.0.1:4328 tcp
N/A 127.0.0.1:4328 tcp
N/A 127.0.0.1:4328 tcp
US 8.8.8.8:53 20.ip.gl.ply.gg udp
US 8.8.8.8:53 20.ip.gl.ply.gg udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
N/A 127.0.0.1:4328 tcp
US 8.8.8.8:53 20.ip.gl.ply.gg udp
N/A 127.0.0.1:4328 tcp
N/A 127.0.0.1:4328 tcp
US 8.8.8.8:53 20.ip.gl.ply.gg udp
N/A 127.0.0.1:4328 tcp

Files

memory/2284-0-0x00007FF982973000-0x00007FF982975000-memory.dmp

memory/2284-1-0x00000000005A0000-0x00000000005C8000-memory.dmp

memory/3512-2-0x00000142EF820000-0x00000142EF842000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_krujlmui.gjt.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/3512-12-0x00007FF982970000-0x00007FF983431000-memory.dmp

memory/3512-13-0x00007FF982970000-0x00007FF983431000-memory.dmp

memory/3512-14-0x00007FF982970000-0x00007FF983431000-memory.dmp

memory/3512-17-0x00007FF982970000-0x00007FF983431000-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 6d42b6da621e8df5674e26b799c8e2aa
SHA1 ab3ce1327ea1eeedb987ec823d5e0cb146bafa48
SHA256 5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c
SHA512 53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

MD5 7e3dba9896e2a6fc782ff3f38f7174a7
SHA1 a6277b46ae1cf2c66f6f79656eb5ec48c0ffe601
SHA256 34bf96a7a541eebcfd65e706649affeb64da710f89afa2386cc38714338c010d
SHA512 722c6778f5853fb8c12cb17ba443ce03b654d163dd39f8a1a54b89cc067d44dc8b536c90d2fae1805aea27e731056c0749264a1229538b1b17e019d9613affc1

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

MD5 04114c0529b116bf66d764ff6a5a8fe3
SHA1 0caeff17d1b2190f76c9bf539105f6c40c92bd14
SHA256 fd7092b4e273314186bad6ce71aa4cd69450736b6ec6cc746868997ff82a7532
SHA512 6a718c330824346606ef24f71cca6be0bfafc626b1d2b060b36e919ab07f3d6a345f56cace8a5a84ffbe2183976eb197842c9fd2f3e3b8c8dd307057d59d6f26

memory/2284-56-0x00007FF982970000-0x00007FF983431000-memory.dmp

memory/2284-57-0x00007FF982973000-0x00007FF982975000-memory.dmp

memory/2284-58-0x00007FF982970000-0x00007FF983431000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-31 12:39

Reported

2024-05-31 12:42

Platform

win7-20240221-en

Max time kernel

118s

Max time network

122s

Command Line

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

Signatures

Detect Xworm Payload

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe" C:\Users\Admin\AppData\Local\Temp\rew.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1176 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Local\Temp\rew.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1176 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Local\Temp\rew.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1176 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Local\Temp\rew.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1176 wrote to memory of 2604 N/A C:\Users\Admin\AppData\Local\Temp\rew.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1176 wrote to memory of 2604 N/A C:\Users\Admin\AppData\Local\Temp\rew.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1176 wrote to memory of 2604 N/A C:\Users\Admin\AppData\Local\Temp\rew.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1176 wrote to memory of 2612 N/A C:\Users\Admin\AppData\Local\Temp\rew.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1176 wrote to memory of 2612 N/A C:\Users\Admin\AppData\Local\Temp\rew.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1176 wrote to memory of 2612 N/A C:\Users\Admin\AppData\Local\Temp\rew.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1176 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\rew.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1176 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\rew.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1176 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\rew.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

Processes

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

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

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'rew.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 20.ip.gl.ply.gg udp

Files

memory/1176-0-0x000007FEF5BA3000-0x000007FEF5BA4000-memory.dmp

memory/1176-1-0x0000000000280000-0x00000000002A8000-memory.dmp

memory/1352-6-0x0000000002730000-0x00000000027B0000-memory.dmp

memory/1352-7-0x000000001B220000-0x000000001B502000-memory.dmp

memory/1352-8-0x00000000022E0000-0x00000000022E8000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

MD5 4802604145abe0b423db5597576793e4
SHA1 e5ad537bc0a27aa56d39163ce7bba27c53d13dab
SHA256 c2c74c3d60d4cb3660eb142129b6a67ff028d4d43d5ee37ddd68d86d49d6f165
SHA512 8dcadb2b64ced44a6b0efd6391257221303c0df7b8860c42184c4ff8a656a9fc140a091525d37161c48b40ffbc8a6cde81bae05243e4cf6d6be4985c93f3bab9

memory/2604-14-0x000000001B1F0000-0x000000001B4D2000-memory.dmp

memory/2604-15-0x0000000002290000-0x0000000002298000-memory.dmp

\??\PIPE\srvsvc

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

memory/1176-31-0x0000000000520000-0x00000000005A0000-memory.dmp

memory/1176-32-0x000007FEF5BA3000-0x000007FEF5BA4000-memory.dmp

memory/1176-33-0x0000000000520000-0x00000000005A0000-memory.dmp