xworm | ea6a26539f74891663a03fc3cf348ef53c14295ef3662b9a29b211a8d0503e1c

Resubmissions

22-01-2025 16:00

250122-tfvb7avnck 10

22-01-2025 13:37

250122-qw89haymbw 10

Analysis

max time kernel
116s
max time network
124s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20250113-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20250113-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
22-01-2025 13:37

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General

Target

svchost.scr
Size

79KB
MD5

0b192c8ec04f4dcd360957eb478221d2
SHA1

522a5c7336a31c23efec4b8ccab7ce7c17d620d4
SHA256

ea6a26539f74891663a03fc3cf348ef53c14295ef3662b9a29b211a8d0503e1c
SHA512

7d5dd7c9aca799a8dc15eea9bf767ca6c7e2145ad848d2b2cefb3548cffb30bbbb3e3933aac7c602e4a1b5f02e14e46b7edbcc3945e1aa2e3cc6219941e90eb6
SSDEEP

1536:bN9+rzFV4eo/7Bd53gXby6WVhodFa/6BAMOgepesq:bNneo/1fqbyd+iQAMOg5sq

Score

10^/10

xworm defense_evasion execution persistence rat trojan

Malware Config

Extracted

Family

xworm

IDKTOBEHONESTNIGAS-56344.portmap.io:56344

Attributes

Install_directory
%LocalAppData%

Signatures

Contains code to disable Windows Defender 1 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral1/memory/2936-56-0x0000000000890000-0x000000000089C000-memory.dmp	disable_win_def

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/2936-1-0x0000000000280000-0x000000000029A000-memory.dmp	family_xworm

UAC bypass 3 TTPs 1 IoCs

defense_evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	svchost.scr

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

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
4064	powershell.exe
3016	powershell.exe
4864	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-1-5-21-1898866115-3160784972-1217720036-1000\Control Panel\International\Geo\Nation	svchost.scr

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	svchost.scr
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	svchost.scr

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-1-5-21-1898866115-3160784972-1217720036-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Local\\svchost.scr"	svchost.scr

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
12	ip-api.com

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

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A	taskmgr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000	taskmgr.exe

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
4112	schtasks.exe

Suspicious behavior: EnumeratesProcesses 34 IoCs

pid	Process
3016	powershell.exe
3016	powershell.exe
4864	powershell.exe
4864	powershell.exe
4064	powershell.exe
4064	powershell.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2936	svchost.scr
Token: SeDebugPrivilege	3016	powershell.exe
Token: SeIncreaseQuotaPrivilege	3016	powershell.exe
Token: SeSecurityPrivilege	3016	powershell.exe
Token: SeTakeOwnershipPrivilege	3016	powershell.exe
Token: SeLoadDriverPrivilege	3016	powershell.exe
Token: SeSystemProfilePrivilege	3016	powershell.exe
Token: SeSystemtimePrivilege	3016	powershell.exe
Token: SeProfSingleProcessPrivilege	3016	powershell.exe
Token: SeIncBasePriorityPrivilege	3016	powershell.exe
Token: SeCreatePagefilePrivilege	3016	powershell.exe
Token: SeBackupPrivilege	3016	powershell.exe
Token: SeRestorePrivilege	3016	powershell.exe
Token: SeShutdownPrivilege	3016	powershell.exe
Token: SeDebugPrivilege	3016	powershell.exe
Token: SeSystemEnvironmentPrivilege	3016	powershell.exe
Token: SeRemoteShutdownPrivilege	3016	powershell.exe
Token: SeUndockPrivilege	3016	powershell.exe
Token: SeManageVolumePrivilege	3016	powershell.exe
Token: 33	3016	powershell.exe
Token: 34	3016	powershell.exe
Token: 35	3016	powershell.exe
Token: 36	3016	powershell.exe
Token: SeDebugPrivilege	4864	powershell.exe
Token: SeIncreaseQuotaPrivilege	4864	powershell.exe
Token: SeSecurityPrivilege	4864	powershell.exe
Token: SeTakeOwnershipPrivilege	4864	powershell.exe
Token: SeLoadDriverPrivilege	4864	powershell.exe
Token: SeSystemProfilePrivilege	4864	powershell.exe
Token: SeSystemtimePrivilege	4864	powershell.exe
Token: SeProfSingleProcessPrivilege	4864	powershell.exe
Token: SeIncBasePriorityPrivilege	4864	powershell.exe
Token: SeCreatePagefilePrivilege	4864	powershell.exe
Token: SeBackupPrivilege	4864	powershell.exe
Token: SeRestorePrivilege	4864	powershell.exe
Token: SeShutdownPrivilege	4864	powershell.exe
Token: SeDebugPrivilege	4864	powershell.exe
Token: SeSystemEnvironmentPrivilege	4864	powershell.exe
Token: SeRemoteShutdownPrivilege	4864	powershell.exe
Token: SeUndockPrivilege	4864	powershell.exe
Token: SeManageVolumePrivilege	4864	powershell.exe
Token: 33	4864	powershell.exe
Token: 34	4864	powershell.exe
Token: 35	4864	powershell.exe
Token: 36	4864	powershell.exe
Token: SeDebugPrivilege	4064	powershell.exe
Token: SeIncreaseQuotaPrivilege	4064	powershell.exe
Token: SeSecurityPrivilege	4064	powershell.exe
Token: SeTakeOwnershipPrivilege	4064	powershell.exe
Token: SeLoadDriverPrivilege	4064	powershell.exe
Token: SeSystemProfilePrivilege	4064	powershell.exe
Token: SeSystemtimePrivilege	4064	powershell.exe
Token: SeProfSingleProcessPrivilege	4064	powershell.exe
Token: SeIncBasePriorityPrivilege	4064	powershell.exe
Token: SeCreatePagefilePrivilege	4064	powershell.exe
Token: SeBackupPrivilege	4064	powershell.exe
Token: SeRestorePrivilege	4064	powershell.exe
Token: SeShutdownPrivilege	4064	powershell.exe
Token: SeDebugPrivilege	4064	powershell.exe
Token: SeSystemEnvironmentPrivilege	4064	powershell.exe
Token: SeRemoteShutdownPrivilege	4064	powershell.exe
Token: SeUndockPrivilege	4064	powershell.exe
Token: SeManageVolumePrivilege	4064	powershell.exe
Token: 33	4064	powershell.exe

Suspicious use of FindShellTrayWindow 40 IoCs

pid	Process
2936	svchost.scr
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe

Suspicious use of SendNotifyMessage 39 IoCs

pid	Process
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe
4756	taskmgr.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2936 wrote to memory of 3016	2936	svchost.scr	87
PID 2936 wrote to memory of 3016	2936	svchost.scr	87
PID 2936 wrote to memory of 4864	2936	svchost.scr	91
PID 2936 wrote to memory of 4864	2936	svchost.scr	91
PID 2936 wrote to memory of 4064	2936	svchost.scr	93
PID 2936 wrote to memory of 4064	2936	svchost.scr	93
PID 2936 wrote to memory of 4112	2936	svchost.scr	96
PID 2936 wrote to memory of 4112	2936	svchost.scr	96

System policy modification 1 TTPs 2 IoCs

defense_evasion

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\policies\system	svchost.scr
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	svchost.scr

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\svchost.scr
"C:\Users\Admin\AppData\Local\Temp\svchost.scr" /S
1⤵
- UAC bypass
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2936
- 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\svchost.scr'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3016
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.scr'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4864
- 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\svchost.scr'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4064
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Local\svchost.scr"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4112

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:4756

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

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

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
6a807b1c91ac66f33f88a787d64904c1

SHA1
83c554c7de04a8115c9005709e5cd01fca82c5d3

SHA256
155314c1c86d8d4e5b802f1eef603c5dd4a2f7c949f069a38af5ba4959bd8256

SHA512
29f2d9f30fc081e7fe6e9fb772c810c9be0422afdc6aff5a286f49a990ededebcf0d083798c2d9f41ad8434393c6d0f5fa6df31226d9c3511ba2a41eb4a65200

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

Filesize
1KB

MD5
b9550095243d37456e377c311dc7b655

SHA1
2f39f9f1da32b3182c5895699958031d4de798aa

SHA256
2b2f3abdcc8f0d6beef7dd9d65e4bb7de7a40ed05bb84e53470174a687772c37

SHA512
5bc2430e2e23c5a21af73e92b4d3611e77531bae2bd580685f2b9768e2e98de2198c4c26bb2ca1e48a67d48cf22b4b94817a3710cb867d207dd479f16f40469a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rtdddv0t.nay.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2936-2-0x00007FFCA45A0000-0x00007FFCA5062000-memory.dmp

Filesize
10.8MB

Download
memory/2936-56-0x0000000000890000-0x000000000089C000-memory.dmp

Filesize
48KB

Download
memory/2936-55-0x0000000000840000-0x000000000084A000-memory.dmp

Filesize
40KB

Download
memory/2936-0-0x00007FFCA45A3000-0x00007FFCA45A5000-memory.dmp

Filesize
8KB

Download
memory/2936-53-0x000000001BFF0000-0x000000001BFFC000-memory.dmp

Filesize
48KB

Download
memory/2936-17-0x00007FFCA45A3000-0x00007FFCA45A5000-memory.dmp

Filesize
8KB

Download
memory/2936-45-0x00007FFCA45A0000-0x00007FFCA5062000-memory.dmp

Filesize
10.8MB

Download
memory/2936-1-0x0000000000280000-0x000000000029A000-memory.dmp

Filesize
104KB

Download
memory/3016-18-0x00007FFCA45A0000-0x00007FFCA5062000-memory.dmp

Filesize
10.8MB

Download
memory/3016-3-0x00007FFCA45A0000-0x00007FFCA5062000-memory.dmp

Filesize
10.8MB

Download
memory/3016-21-0x00007FFCA45A0000-0x00007FFCA5062000-memory.dmp

Filesize
10.8MB

Download
memory/3016-4-0x00007FFCA45A0000-0x00007FFCA5062000-memory.dmp

Filesize
10.8MB

Download
memory/3016-16-0x00007FFCA45A0000-0x00007FFCA5062000-memory.dmp

Filesize
10.8MB

Download
memory/3016-15-0x000001D564F90000-0x000001D564FB2000-memory.dmp

Filesize
136KB

Download
memory/3016-5-0x00007FFCA45A0000-0x00007FFCA5062000-memory.dmp

Filesize
10.8MB

Download
memory/4756-59-0x00000194F6770000-0x00000194F6771000-memory.dmp

Filesize
4KB

Download
memory/4756-57-0x00000194F6770000-0x00000194F6771000-memory.dmp

Filesize
4KB

Download
memory/4756-58-0x00000194F6770000-0x00000194F6771000-memory.dmp

Filesize
4KB

Download
memory/4756-66-0x00000194F6770000-0x00000194F6771000-memory.dmp

Filesize
4KB

Download
memory/4756-69-0x00000194F6770000-0x00000194F6771000-memory.dmp

Filesize
4KB

Download
memory/4756-67-0x00000194F6770000-0x00000194F6771000-memory.dmp

Filesize
4KB

Download
memory/4756-68-0x00000194F6770000-0x00000194F6771000-memory.dmp

Filesize
4KB

Download
memory/4756-65-0x00000194F6770000-0x00000194F6771000-memory.dmp

Filesize
4KB

Download
memory/4756-63-0x00000194F6770000-0x00000194F6771000-memory.dmp

Filesize
4KB

Download
memory/4756-64-0x00000194F6770000-0x00000194F6771000-memory.dmp

Filesize
4KB

Download