xworm | c150b18ea2bd00902f2b8de9b0439ef6bd2a448b3255ac4619bab7de57407ea3

Analysis

max time kernel
147s
max time network
151s
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 16:44

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General

Target

XClient.exe
Size

41KB
MD5

486527e2986049735316f190c8571c72
SHA1

9ce5e9ae89d3b91c834ac66d5ab947687b867c19
SHA256

c150b18ea2bd00902f2b8de9b0439ef6bd2a448b3255ac4619bab7de57407ea3
SHA512

01ed720a7100238bb51e1fa6ebe88e62a3fa6c3060c472891c38b0cfc17e29d4f11899a0dd12d3460473f751af299a5e5c87e97a2a75b0c7e911b5797f13c745
SSDEEP

768:bG2ZOWZ42nxuT3XvgggCLJF5PG9pmWJ6vOwhX3Emz9:bG2bZ42n07XvvgcFI9AWJ6vOwV9Z

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

ikonik2681-35277.portmap.host:35277

Mutex

NwRz6E7beRbMfRwa

Attributes

Install_directory
%AppData%
install_file
$77MicrosoftDefender.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/2284-1-0x0000000000F10000-0x0000000000F20000-memory.dmp	family_xworm
behavioral1/files/0x00280000000451c0-60.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
4208	powershell.exe
4800	powershell.exe
272	powershell.exe
1492	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-1-5-21-1361837696-2276465416-1936241636-1000\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 3 IoCs

pid	Process
4060	$77MicrosoftDefender.exe
1864	$77MicrosoftDefender.exe
2212	$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-1-5-21-1361837696-2276465416-1936241636-1000\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
15	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
2412	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4208	powershell.exe
4208	powershell.exe
4800	powershell.exe
4800	powershell.exe
272	powershell.exe
272	powershell.exe
1492	powershell.exe
1492	powershell.exe
2284	XClient.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2284	XClient.exe
Token: SeDebugPrivilege	4208	powershell.exe
Token: SeIncreaseQuotaPrivilege	4208	powershell.exe
Token: SeSecurityPrivilege	4208	powershell.exe
Token: SeTakeOwnershipPrivilege	4208	powershell.exe
Token: SeLoadDriverPrivilege	4208	powershell.exe
Token: SeSystemProfilePrivilege	4208	powershell.exe
Token: SeSystemtimePrivilege	4208	powershell.exe
Token: SeProfSingleProcessPrivilege	4208	powershell.exe
Token: SeIncBasePriorityPrivilege	4208	powershell.exe
Token: SeCreatePagefilePrivilege	4208	powershell.exe
Token: SeBackupPrivilege	4208	powershell.exe
Token: SeRestorePrivilege	4208	powershell.exe
Token: SeShutdownPrivilege	4208	powershell.exe
Token: SeDebugPrivilege	4208	powershell.exe
Token: SeSystemEnvironmentPrivilege	4208	powershell.exe
Token: SeRemoteShutdownPrivilege	4208	powershell.exe
Token: SeUndockPrivilege	4208	powershell.exe
Token: SeManageVolumePrivilege	4208	powershell.exe
Token: 33	4208	powershell.exe
Token: 34	4208	powershell.exe
Token: 35	4208	powershell.exe
Token: 36	4208	powershell.exe
Token: SeDebugPrivilege	4800	powershell.exe
Token: SeIncreaseQuotaPrivilege	4800	powershell.exe
Token: SeSecurityPrivilege	4800	powershell.exe
Token: SeTakeOwnershipPrivilege	4800	powershell.exe
Token: SeLoadDriverPrivilege	4800	powershell.exe
Token: SeSystemProfilePrivilege	4800	powershell.exe
Token: SeSystemtimePrivilege	4800	powershell.exe
Token: SeProfSingleProcessPrivilege	4800	powershell.exe
Token: SeIncBasePriorityPrivilege	4800	powershell.exe
Token: SeCreatePagefilePrivilege	4800	powershell.exe
Token: SeBackupPrivilege	4800	powershell.exe
Token: SeRestorePrivilege	4800	powershell.exe
Token: SeShutdownPrivilege	4800	powershell.exe
Token: SeDebugPrivilege	4800	powershell.exe
Token: SeSystemEnvironmentPrivilege	4800	powershell.exe
Token: SeRemoteShutdownPrivilege	4800	powershell.exe
Token: SeUndockPrivilege	4800	powershell.exe
Token: SeManageVolumePrivilege	4800	powershell.exe
Token: 33	4800	powershell.exe
Token: 34	4800	powershell.exe
Token: 35	4800	powershell.exe
Token: 36	4800	powershell.exe
Token: SeDebugPrivilege	272	powershell.exe
Token: SeIncreaseQuotaPrivilege	272	powershell.exe
Token: SeSecurityPrivilege	272	powershell.exe
Token: SeTakeOwnershipPrivilege	272	powershell.exe
Token: SeLoadDriverPrivilege	272	powershell.exe
Token: SeSystemProfilePrivilege	272	powershell.exe
Token: SeSystemtimePrivilege	272	powershell.exe
Token: SeProfSingleProcessPrivilege	272	powershell.exe
Token: SeIncBasePriorityPrivilege	272	powershell.exe
Token: SeCreatePagefilePrivilege	272	powershell.exe
Token: SeBackupPrivilege	272	powershell.exe
Token: SeRestorePrivilege	272	powershell.exe
Token: SeShutdownPrivilege	272	powershell.exe
Token: SeDebugPrivilege	272	powershell.exe
Token: SeSystemEnvironmentPrivilege	272	powershell.exe
Token: SeRemoteShutdownPrivilege	272	powershell.exe
Token: SeUndockPrivilege	272	powershell.exe
Token: SeManageVolumePrivilege	272	powershell.exe
Token: 33	272	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2284	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2284 wrote to memory of 4208	2284	XClient.exe	87
PID 2284 wrote to memory of 4208	2284	XClient.exe	87
PID 2284 wrote to memory of 4800	2284	XClient.exe	91
PID 2284 wrote to memory of 4800	2284	XClient.exe	91
PID 2284 wrote to memory of 272	2284	XClient.exe	95
PID 2284 wrote to memory of 272	2284	XClient.exe	95
PID 2284 wrote to memory of 1492	2284	XClient.exe	97
PID 2284 wrote to memory of 1492	2284	XClient.exe	97
PID 2284 wrote to memory of 2412	2284	XClient.exe	99
PID 2284 wrote to memory of 2412	2284	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:2284
- 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:4208
- 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:4800
- 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:272
- 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:1492
- 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:2412

C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
"C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe"
1⤵
- Executes dropped EXE
PID:4060

C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
"C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe"
1⤵
- Executes dropped EXE
PID:1864

C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
"C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe"
1⤵
- Executes dropped EXE
PID:2212

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\$77MicrosoftDefender.exe.log

Filesize
654B

MD5
11c6e74f0561678d2cf7fc075a6cc00c

SHA1
535ee79ba978554abcb98c566235805e7ea18490

SHA256
d39a78fabca39532fcb85ce908781a75132e1bd01cc50a3b290dd87127837d63

SHA512
32c63d67bf512b42e7f57f71287b354200126cb417ef9d869c72e0b9388a7c2f5e3b61f303f1353baa1bf482d0f17e06e23c9f50b2f1babd4d958b6da19c40b0

Download Submit
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
60b3262c3163ee3d466199160b9ed07d

SHA1
994ece4ea4e61de0be2fdd580f87e3415f9e1ff6

SHA256
e3b30f16d41f94cba2b8a75f35c91ae7418465abfbfe5477ec0551d1952b2fdb

SHA512
081d2015cb94477eb0fbc38f44b6d9b4a3204fb3ad0b7d0e146a88ab4ab9a0d475207f1adae03f4a81ccc5beb7568dc8be1249f69e32fe56efd9ee2f6ee3b1af

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

Filesize
1KB

MD5
9d7f71caf6c344adf5c5e24fb4e4e544

SHA1
d5cf1c5df9c255250cf049a798eb343c341a70f1

SHA256
53fdda513a99977a4fd5019b0da021024959eadbb0fffcf7694cdcba55c56408

SHA512
a651d6e2c052b2403944de7702590379c920d3f4dfc99bed94207b6fb58b5f7d3d55f5012d1de86803f40dd2bf88770d2ac8708288937108c13f26c087228362

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

Filesize
1KB

MD5
d28e53beeae9e40d9977a08927821c24

SHA1
d98880fca563c0be85e9280169cfcfae4b4e0a23

SHA256
fc36eaee30ffece362301575251f1cef3fbae3c64460e70f803ce8d11e6b1848

SHA512
d1f00c4a99ab2083c40f93554166f69de03839315eaed32aa145c0c7409d14df474175ebbb8ae51fd3a8e31aec6622a0f297decb33f3228188c9c637e2f2772e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4hct0efm.lxj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
41KB

MD5
486527e2986049735316f190c8571c72

SHA1
9ce5e9ae89d3b91c834ac66d5ab947687b867c19

SHA256
c150b18ea2bd00902f2b8de9b0439ef6bd2a448b3255ac4619bab7de57407ea3

SHA512
01ed720a7100238bb51e1fa6ebe88e62a3fa6c3060c472891c38b0cfc17e29d4f11899a0dd12d3460473f751af299a5e5c87e97a2a75b0c7e911b5797f13c745

Download Submit
memory/2284-1-0x0000000000F10000-0x0000000000F20000-memory.dmp

Filesize
64KB

Download
memory/2284-2-0x00007FFEBACC0000-0x00007FFEBB782000-memory.dmp

Filesize
10.8MB

Download
memory/2284-0-0x00007FFEBACC3000-0x00007FFEBACC5000-memory.dmp

Filesize
8KB

Download
memory/2284-55-0x00007FFEBACC0000-0x00007FFEBB782000-memory.dmp

Filesize
10.8MB

Download
memory/4208-12-0x000001EC07C70000-0x000001EC07C92000-memory.dmp

Filesize
136KB

Download
memory/4208-20-0x00007FFEBACC0000-0x00007FFEBB782000-memory.dmp

Filesize
10.8MB

Download
memory/4208-17-0x00007FFEBACC0000-0x00007FFEBB782000-memory.dmp

Filesize
10.8MB

Download
memory/4208-16-0x00007FFEBACC0000-0x00007FFEBB782000-memory.dmp

Filesize
10.8MB

Download
memory/4208-15-0x00007FFEBACC0000-0x00007FFEBB782000-memory.dmp

Filesize
10.8MB

Download
memory/4208-14-0x00007FFEBACC0000-0x00007FFEBB782000-memory.dmp

Filesize
10.8MB

Download
memory/4208-13-0x00007FFEBACC0000-0x00007FFEBB782000-memory.dmp

Filesize
10.8MB

Download