xworm | db77279f6b996ae07ac5fd3b1edb3ecf9525087c96bbcf2d7a2a4c100db2cc7b

Analysis

max time kernel
6s
max time network
5s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
22/06/2024, 06:28

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General

Target
Discord.exe
Size 37KB
Sample240622-g8e2ravdql
SHA256 db77279f6b996ae07ac5fd3b1edb3ecf9525087c96bbcf2d7a2a4c100db2cc7b
MD5 5c68aeb4a851c6e926ead1ff59f90640
SHA1 43771d2ff223f80c51a4907786037e746160d0fc
SHA512 074e91d484a5fbcac50f947a5c2daea247ba57f3ebdf93381d7710aa5e29f7a123fda2147764880f681694fb2cc2e86c2ef5a0fef638a2fe7db0c73104bb8172
SSDEEP 768:OEVqIZbwCxWaAXFyw9OY+v6sO/hKPSKAxC:O8qIZb9xKFP9h+6sO/MvAU
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

147.185.221.20:33255

Mutex

L38G3mo1mQdyxT1M

Attributes

Install_directory
%Public%
install_file
Discord.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral3/memory/5052-1-0x0000000000B00000-0x0000000000B10000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
996	powershell.exe
3712	powershell.exe
1844	powershell.exe
780	powershell.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3433428765-2473475212-4279855560-1000\Software\Microsoft\Windows\CurrentVersion\Run\Discord = "C:\\Users\\Public\\Discord.exe"	Discord.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
1	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4668	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1844	powershell.exe
1844	powershell.exe
780	powershell.exe
780	powershell.exe
996	powershell.exe
996	powershell.exe
3712	powershell.exe
3712	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	5052	Discord.exe
Token: SeDebugPrivilege	1844	powershell.exe
Token: SeDebugPrivilege	780	powershell.exe
Token: SeDebugPrivilege	996	powershell.exe
Token: SeDebugPrivilege	3712	powershell.exe
Token: SeDebugPrivilege	5052	Discord.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 5052 wrote to memory of 1844	5052	Discord.exe	78
PID 5052 wrote to memory of 1844	5052	Discord.exe	78
PID 5052 wrote to memory of 780	5052	Discord.exe	80
PID 5052 wrote to memory of 780	5052	Discord.exe	80
PID 5052 wrote to memory of 996	5052	Discord.exe	82
PID 5052 wrote to memory of 996	5052	Discord.exe	82
PID 5052 wrote to memory of 3712	5052	Discord.exe	84
PID 5052 wrote to memory of 3712	5052	Discord.exe	84
PID 5052 wrote to memory of 4668	5052	Discord.exe	86
PID 5052 wrote to memory of 4668	5052	Discord.exe	86

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Discord.exe
"C:\Users\Admin\AppData\Local\Temp\Discord.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5052
- 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\Discord.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1844
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Discord.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:780
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\Discord.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:996
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Discord.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3712
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Discord" /tr "C:\Users\Public\Discord.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4668

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c
MD5 627073ee3ca9676911bee35548eff2b8
SHA1 4c4b68c65e2cab9864b51167d710aa29ebdcff2e
SHA512 3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888
MD5 1a9fa92a4f2e2ec9e244d43a6a4f8fb9
SHA1 9910190edfaccece1dfcc1d92e357772f5dae8f7
SHA512 5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 83387ce468d717a7b4ba238af2273da873b731a13cc35604f775a31fa0ac70ea
MD5 e07eea85a8893f23fb814cf4b3ed974c
SHA1 8a8125b2890bbddbfc3531d0ee4393dbbf5936fe
SHA512 9d4808d8a261005391388b85da79e4c5396bdded6e7e5ce3a3a23e7359d1aa1fb983b4324f97e0afec6e8ed9d898322ca258dd7cda654456dd7e84c9cbd509df
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 3f67e4ba795fd89d33e9a1fe7547e297a82ae50b8f25eedc2b33a27866b28888
MD5 051a74485331f9d9f5014e58ec71566c
SHA1 4ed0256a84f2e95609a0b4d5c249bca624db8fe4
SHA512 1f15fd8ca727b198495ef826002c1cbcc63e98eecb2e92abff48354ae668e6c3aaf9bd3005664967ae75637bacee7e730ce36142483d08ae6a068d9ae3e0e17d
MD5 SHA1 SHA512

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__PSScriptPolicyTest_losb0yc4.w2n.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_losb0yc4.w2n.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/1844-3-0x00007FF971810000-0x00007FF9722D2000-memory.dmp

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memory/1844-10-0x0000020771440000-0x0000020771462000-memory.dmp

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memory/1844-14-0x00007FF971810000-0x00007FF9722D2000-memory.dmp

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memory/1844-15-0x00007FF971810000-0x00007FF9722D2000-memory.dmp

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memory/1844-16-0x00007FF971810000-0x00007FF9722D2000-memory.dmp

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memory/1844-19-0x00007FF971810000-0x00007FF9722D2000-memory.dmp

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memory/1844-4-0x00007FF971810000-0x00007FF9722D2000-memory.dmp

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memory/5052-0-0x00007FF971813000-0x00007FF971815000-memory.dmp

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memory/5052-2-0x00007FF971810000-0x00007FF9722D2000-memory.dmp

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memory/5052-1-0x0000000000B00000-0x0000000000B10000-memory.dmp

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