Malware Analysis Report

2024-11-16 13:34

Sample ID 240526-s115ssbc8y
Target Expensive 3.1.exe
SHA256 eb75a771291082654ce1c0ef9feb1bf6cd30da8b85b1e342df0bd3b9af35a3b8
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: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

eb75a771291082654ce1c0ef9feb1bf6cd30da8b85b1e342df0bd3b9af35a3b8

Threat Level: Known bad

The file Expensive 3.1.exe was found to be: Known bad.

Malicious Activity Summary

xworm execution persistence rat trojan

Xworm family

Xworm

Detect Xworm Payload

Command and Scripting Interpreter: PowerShell

Adds Run key to start application

Unsigned PE

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Modifies registry class

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-26 15:36

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

2024-05-26 15:36

Reported

2024-05-26 15:38

Platform

win11-20240426-en

Max time kernel

112s

Max time network

133s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Expensive 3.1.exe"

Signatures

Detect Xworm Payload

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

Xworm

trojan rat xworm

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1696768468-2170909707-4198977321-1000\Software\Microsoft\Windows\CurrentVersion\Run\Expensive 3.1 = "C:\\Users\\Admin\\AppData\\Roaming\\Expensive 3.1.exe" C:\Users\Admin\AppData\Local\Temp\Expensive 3.1.exe N/A

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1696768468-2170909707-4198977321-1000_Classes\Local Settings\MuiCache C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Expensive 3.1.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\Expensive 3.1.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Expensive 3.1.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Expensive 3.1.exe

"C:\Users\Admin\AppData\Local\Temp\Expensive 3.1.exe"

C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe

"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca

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\Expensive 3.1.exe'

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Expensive 3.1.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\Expensive 3.1.exe'

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Expensive 3.1.exe'

C:\Windows\system32\sihost.exe

sihost.exe

C:\Windows\system32\sihost.exe

sihost.exe

C:\Windows\system32\sihost.exe

sihost.exe

C:\Windows\system32\sihost.exe

sihost.exe

C:\Windows\system32\sihost.exe

sihost.exe

C:\Windows\system32\sihost.exe

sihost.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 loss-winners.gl.at.ply.gg udp
US 147.185.221.19:61007 loss-winners.gl.at.ply.gg tcp
US 8.8.8.8:53 19.221.185.147.in-addr.arpa udp
US 147.185.221.19:61007 loss-winners.gl.at.ply.gg tcp

Files

memory/5048-0-0x00007FFF466D3000-0x00007FFF466D5000-memory.dmp

memory/5048-1-0x0000000000EC0000-0x0000000000ED6000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_csbskkvf.dxk.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/1140-10-0x000001EFE0BD0000-0x000001EFE0BF2000-memory.dmp

C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

MD5 2f23663111658be2ba0b273463ff5e60
SHA1 c2af77369b83a0177bfdb90c11fad4c5f897a983
SHA256 eab4709a1ad32b0b87a53d307893899eb3ee26c6a59a1b34fe83062c79817513
SHA512 e0fdfe555a47709cbf14c4c22498c89c3e8fd61c5b40806b9dd06aee20fbdcd3d9c4f7861d1183df15e9c64ed25828f97c8292bc6b4a700d3d4586433bf45bd8

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 e3840d9bcedfe7017e49ee5d05bd1c46
SHA1 272620fb2605bd196df471d62db4b2d280a363c6
SHA256 3ac83e70415b9701ee71a4560232d7998e00c3db020fde669eb01b8821d2746f
SHA512 76adc88ab3930acc6b8b7668e2de797b8c00edcfc41660ee4485259c72a8adf162db62c2621ead5a9950f12bfe8a76ccab79d02fda11860afb0e217812cac376

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

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

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

MD5 ca018da6474d5ee45c05ce24f20318d8
SHA1 034c4116e4d397972fe94e181e9bf8bec1ac5a29
SHA256 967584c98855ce11eaa685e1a125482181bce5de4e634ebcfe20f1e287bda0d7
SHA512 08197218e9c43aab167c0f9622113ddcdf1c250777191b8ff54fecb814fae7d7a7f08c041e9b27a9969ee82bcb9ac595ef3ab9058d991835770d36b13cf1a0c7

memory/5048-52-0x00007FFF466D0000-0x00007FFF47192000-memory.dmp

memory/5048-53-0x00007FFF466D3000-0x00007FFF466D5000-memory.dmp

memory/5048-54-0x00007FFF466D0000-0x00007FFF47192000-memory.dmp

memory/5048-55-0x0000000002E80000-0x0000000002E8C000-memory.dmp