xworm | 739dcb8887532e966ae7e49e95de28b9f89e342d5ac8ab4a6fc66163a6ec656a

Analysis

max time kernel
112s
max time network
113s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
20-11-2024 16:42

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General

Target

XClient.exe
Size

41KB
MD5

f39bdd2e04dd6485c35843cfb7ed5328
SHA1

12613c804847302eaf51d248125bf567d6e0fc81
SHA256

739dcb8887532e966ae7e49e95de28b9f89e342d5ac8ab4a6fc66163a6ec656a
SHA512

ff0ab2cab30d784c429f614915d6e90623ba4e07952052263d3d64abe5b19a462f0dbfee57c13a19f258828bf0a18011f5e8154f0cc655275303a186114d8664
SSDEEP

768:myIOKKVKWC6+3XvgggCLJF5PG9pm96vOwhv3Emz/:mzbKVKWLoXvvgcFI9A96vOwN9z

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

tcp://ikonik2681-35277.portmap.host:35277

Mutex

vlO7QJJcLCTXEz3h

Attributes

Install_directory
%AppData%
install_file
$77MicrosoftDefender.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/3820-1-0x0000000000040000-0x0000000000050000-memory.dmp	family_xworm
behavioral1/files/0x0028000000044fb8-62.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
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
1412	powershell.exe
3580	powershell.exe
2024	powershell.exe
760	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-870806430-2618236806-3023919190-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77MicrosoftDefender.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77MicrosoftDefender.lnk	XClient.exe

Executes dropped EXE 2 IoCs

pid	Process
2364	$77MicrosoftDefender.exe
3088	$77MicrosoftDefender.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-1-5-21-870806430-2618236806-3023919190-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\$77MicrosoftDefender = "C:\\Users\\Admin\\AppData\\Roaming\\$77MicrosoftDefender.exe"	XClient.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
16	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
2072	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1412	powershell.exe
1412	powershell.exe
3580	powershell.exe
3580	powershell.exe
2024	powershell.exe
2024	powershell.exe
760	powershell.exe
760	powershell.exe
3820	XClient.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3820	XClient.exe
Token: SeDebugPrivilege	1412	powershell.exe
Token: SeIncreaseQuotaPrivilege	1412	powershell.exe
Token: SeSecurityPrivilege	1412	powershell.exe
Token: SeTakeOwnershipPrivilege	1412	powershell.exe
Token: SeLoadDriverPrivilege	1412	powershell.exe
Token: SeSystemProfilePrivilege	1412	powershell.exe
Token: SeSystemtimePrivilege	1412	powershell.exe
Token: SeProfSingleProcessPrivilege	1412	powershell.exe
Token: SeIncBasePriorityPrivilege	1412	powershell.exe
Token: SeCreatePagefilePrivilege	1412	powershell.exe
Token: SeBackupPrivilege	1412	powershell.exe
Token: SeRestorePrivilege	1412	powershell.exe
Token: SeShutdownPrivilege	1412	powershell.exe
Token: SeDebugPrivilege	1412	powershell.exe
Token: SeSystemEnvironmentPrivilege	1412	powershell.exe
Token: SeRemoteShutdownPrivilege	1412	powershell.exe
Token: SeUndockPrivilege	1412	powershell.exe
Token: SeManageVolumePrivilege	1412	powershell.exe
Token: 33	1412	powershell.exe
Token: 34	1412	powershell.exe
Token: 35	1412	powershell.exe
Token: 36	1412	powershell.exe
Token: SeDebugPrivilege	3580	powershell.exe
Token: SeIncreaseQuotaPrivilege	3580	powershell.exe
Token: SeSecurityPrivilege	3580	powershell.exe
Token: SeTakeOwnershipPrivilege	3580	powershell.exe
Token: SeLoadDriverPrivilege	3580	powershell.exe
Token: SeSystemProfilePrivilege	3580	powershell.exe
Token: SeSystemtimePrivilege	3580	powershell.exe
Token: SeProfSingleProcessPrivilege	3580	powershell.exe
Token: SeIncBasePriorityPrivilege	3580	powershell.exe
Token: SeCreatePagefilePrivilege	3580	powershell.exe
Token: SeBackupPrivilege	3580	powershell.exe
Token: SeRestorePrivilege	3580	powershell.exe
Token: SeShutdownPrivilege	3580	powershell.exe
Token: SeDebugPrivilege	3580	powershell.exe
Token: SeSystemEnvironmentPrivilege	3580	powershell.exe
Token: SeRemoteShutdownPrivilege	3580	powershell.exe
Token: SeUndockPrivilege	3580	powershell.exe
Token: SeManageVolumePrivilege	3580	powershell.exe
Token: 33	3580	powershell.exe
Token: 34	3580	powershell.exe
Token: 35	3580	powershell.exe
Token: 36	3580	powershell.exe
Token: SeDebugPrivilege	2024	powershell.exe
Token: SeIncreaseQuotaPrivilege	2024	powershell.exe
Token: SeSecurityPrivilege	2024	powershell.exe
Token: SeTakeOwnershipPrivilege	2024	powershell.exe
Token: SeLoadDriverPrivilege	2024	powershell.exe
Token: SeSystemProfilePrivilege	2024	powershell.exe
Token: SeSystemtimePrivilege	2024	powershell.exe
Token: SeProfSingleProcessPrivilege	2024	powershell.exe
Token: SeIncBasePriorityPrivilege	2024	powershell.exe
Token: SeCreatePagefilePrivilege	2024	powershell.exe
Token: SeBackupPrivilege	2024	powershell.exe
Token: SeRestorePrivilege	2024	powershell.exe
Token: SeShutdownPrivilege	2024	powershell.exe
Token: SeDebugPrivilege	2024	powershell.exe
Token: SeSystemEnvironmentPrivilege	2024	powershell.exe
Token: SeRemoteShutdownPrivilege	2024	powershell.exe
Token: SeUndockPrivilege	2024	powershell.exe
Token: SeManageVolumePrivilege	2024	powershell.exe
Token: 33	2024	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3820	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3820 wrote to memory of 1412	3820	XClient.exe	87
PID 3820 wrote to memory of 1412	3820	XClient.exe	87
PID 3820 wrote to memory of 3580	3820	XClient.exe	91
PID 3820 wrote to memory of 3580	3820	XClient.exe	91
PID 3820 wrote to memory of 2024	3820	XClient.exe	93
PID 3820 wrote to memory of 2024	3820	XClient.exe	93
PID 3820 wrote to memory of 760	3820	XClient.exe	95
PID 3820 wrote to memory of 760	3820	XClient.exe	95
PID 3820 wrote to memory of 2072	3820	XClient.exe	99
PID 3820 wrote to memory of 2072	3820	XClient.exe	99

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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3820
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1412
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3580
- 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\$77MicrosoftDefender.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2024
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '$77MicrosoftDefender.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:760
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "$77MicrosoftDefender" /tr "C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2072

C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
"C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe"
1⤵
- Executes dropped EXE
PID:2364

C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
"C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe"
1⤵
- Executes dropped EXE
PID:3088

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

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

Filesize
3KB

MD5
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

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

Filesize
1KB

MD5
b5bf6b0261deb53c0e3d422e3f83a664

SHA1
60cd83ab6dd15abaa9abf34d9ab54e42c8eefa16

SHA256
a431a9e84c64c6ad29339df6a714cb697081dc1c6c5557ada967d4caaeed0c1c

SHA512
27dfba0d2d7ebce4e6eebdeefa81b2518c5222efb9d37b4c323023e5117eed30ad6aeba8e062bde96d17d53b01bb9a59313229aeaf4863c8b30d9bbb09d46bff

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

Filesize
1KB

MD5
a0584865193c35a64240ed9bb6a1fd57

SHA1
54d3dc0fe85ab62f9eed443ad19f9a7461c8043a

SHA256
25e3e8922df794542c6920fd1ac748e8bef18ad5649a38d7c9839702385e356a

SHA512
4e5b5a63c5f98366fa8caf19c5e822087c4ae29389121e97dd6dac06567cd41b24cab254802aad6e47355fd296673abf14f8a3c0ab3d4e581ba75cf4cfec6e82

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

Filesize
1KB

MD5
075ace49043673efbb552275aa617bd6

SHA1
ab39a6b841f01661918d4067737013dbe8444538

SHA256
11bd4cb2b7ecad8a571ff2957e5135d4b12cd0ca7bb63e61353423c939681223

SHA512
09d03beca5da2640760af08124306bf9190e15a877c83c4c67815e25c8c6a55c903f9a3a90c52bd3694e840924c090ee4bd8bea45c544cc8f22986e29feeeb05

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vafgxv2o.yc4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe

Filesize
41KB

MD5
f39bdd2e04dd6485c35843cfb7ed5328

SHA1
12613c804847302eaf51d248125bf567d6e0fc81

SHA256
739dcb8887532e966ae7e49e95de28b9f89e342d5ac8ab4a6fc66163a6ec656a

SHA512
ff0ab2cab30d784c429f614915d6e90623ba4e07952052263d3d64abe5b19a462f0dbfee57c13a19f258828bf0a18011f5e8154f0cc655275303a186114d8664

Download Submit
memory/1412-16-0x00007FF986250000-0x00007FF986D12000-memory.dmp

Filesize
10.8MB

Download
memory/1412-15-0x00007FF986250000-0x00007FF986D12000-memory.dmp

Filesize
10.8MB

Download
memory/1412-21-0x00007FF986250000-0x00007FF986D12000-memory.dmp

Filesize
10.8MB

Download
memory/1412-20-0x000001CEB8D60000-0x000001CEB8F7D000-memory.dmp

Filesize
2.1MB

Download
memory/1412-22-0x00007FF986250000-0x00007FF986D12000-memory.dmp

Filesize
10.8MB

Download
memory/1412-10-0x000001CEB8D30000-0x000001CEB8D52000-memory.dmp

Filesize
136KB

Download
memory/1412-4-0x00007FF986250000-0x00007FF986D12000-memory.dmp

Filesize
10.8MB

Download
memory/1412-3-0x00007FF986250000-0x00007FF986D12000-memory.dmp

Filesize
10.8MB

Download
memory/3820-0-0x00007FF986253000-0x00007FF986255000-memory.dmp

Filesize
8KB

Download
memory/3820-17-0x00007FF986253000-0x00007FF986255000-memory.dmp

Filesize
8KB

Download
memory/3820-2-0x00007FF986250000-0x00007FF986D12000-memory.dmp

Filesize
10.8MB

Download
memory/3820-60-0x00007FF986250000-0x00007FF986D12000-memory.dmp

Filesize
10.8MB

Download
memory/3820-1-0x0000000000040000-0x0000000000050000-memory.dmp

Filesize
64KB

Download