Malware Analysis Report

2024-11-16 13:41

Sample ID 240531-rd2blsah3y
Target NursultanLoader.rar
SHA256 7f7c3b09b23a4147f13f38fcb8592fc2a86db49ee51b580e52641693382b0a6d
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

7f7c3b09b23a4147f13f38fcb8592fc2a86db49ee51b580e52641693382b0a6d

Threat Level: Known bad

The file NursultanLoader.rar 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

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

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-31 14:05

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

2024-05-31 14:05

Reported

2024-05-31 14:08

Platform

win11-20240426-en

Max time kernel

91s

Max time network

94s

Command Line

"C:\Users\Admin\AppData\Local\Temp\NursultanLoader.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-1-5-21-1230210488-3096403634-4129516247-1000\Software\Microsoft\Windows\CurrentVersion\Run\Expensive 3.1 = "C:\\Users\\Admin\\AppData\\Roaming\\Expensive 3.1.exe" C:\Users\Admin\AppData\Local\Temp\NursultanLoader.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\NursultanLoader.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\NursultanLoader.exe N/A

Suspicious use of SetWindowsHookEx

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

Processes

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

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

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

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

Network

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

Files

memory/4872-0-0x00007FFF30E23000-0x00007FFF30E25000-memory.dmp

memory/4872-1-0x0000000000190000-0x00000000001A6000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ezwdu4hy.wa4.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/2548-7-0x00000216C8500000-0x00000216C8522000-memory.dmp

memory/2548-11-0x00007FFF30E20000-0x00007FFF318E2000-memory.dmp

memory/2548-12-0x00007FFF30E20000-0x00007FFF318E2000-memory.dmp

memory/2548-15-0x00007FFF30E20000-0x00007FFF318E2000-memory.dmp

memory/2548-16-0x00007FFF30E20000-0x00007FFF318E2000-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 05b3cd21c1ec02f04caba773186ee8d0
SHA1 39e790bfe10abf55b74dfb3603df8fcf6b5e6edb
SHA256 911efc5cf9cbeb697543eb3242f5297e1be46dd6603a390140a9ff031ed9e1e8
SHA512 e751008b032394817beb46937fd93a73be97254c2be94dd42f22fb1306d2715c653ece16fa96eab1a3e73811936768cea6b37888437086fc6f3e3e793a2515eb

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

MD5 050567a067ffea4eb40fe2eefebdc1ee
SHA1 6e1fb2c7a7976e0724c532449e97722787a00fec
SHA256 3952d5b543e5cb0cb84014f4ad9f5f1b7166f592d28640cbc3d914d0e6f41d2e
SHA512 341ad71ef7e850b10e229666312e4bca87a0ed9fe25ba4b0ab65661d5a0efa855db0592153106da07134d8fc2c6c0e44709bf38183c9a574a1fa543189971259

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

MD5 781da0576417bf414dc558e5a315e2be
SHA1 215451c1e370be595f1c389f587efeaa93108b4c
SHA256 41a5aef8b0bbeea2766f40a7bba2c78322379f167c610f7055ccb69e7db030fe
SHA512 24e283aa30a2903ebe154dad49b26067a45e46fec57549ad080d3b9ec3f272044efaaed3822d067837f5521262192f466c47195ffe7f75f8c7c5dcf3159ea737

memory/4872-49-0x00007FFF30E20000-0x00007FFF318E2000-memory.dmp

memory/4872-50-0x00007FFF30E23000-0x00007FFF30E25000-memory.dmp

memory/4872-51-0x00007FFF30E20000-0x00007FFF318E2000-memory.dmp