xworm | 4584e840367c8990cb040f840d4e6af35424e3ab7618985bfc76190757eae2a2

General

Target

XWorm.exe
Size

9.1MB
MD5

76b8dd1cc4d42ceb68720da77fa05dab
SHA1

4594f0a2b104257123b72587226e0694ed410803
SHA256

7eacc3500da7eeebe2936d120ac8dbc56de6f1100b0ae77b13da5ee0850af4fb
SHA512

5d72ea084d0b611566eb7fc35e6994c5bfd475813739ca9f5909206c081179d94faf59f707c52f9cf60de44cd1a86a6796c5ed1fd51f20db2c31abec3b9d964e
SSDEEP

3072:5BZK4Q137x/2bSinOvaYA2ewhLapuvpAsZOyMqmyBeYVYm:zZlQ137xebFVc/GWGwqqm1

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

uk1.localto.net:3725

Attributes

Install_directory
%ProgramData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral3/memory/1740-1-0x0000000000960000-0x0000000000998000-memory.dmp	family_xworm
behavioral3/memory/1832-37-0x00000000011B0000-0x00000000011E8000-memory.dmp	family_xworm
behavioral3/memory/2456-41-0x0000000001310000-0x0000000001348000-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
2740	powershell.exe
2744	powershell.exe
2340	powershell.exe
3024	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
1832	svchost.exe
1320	svchost.exe
2456	svchost.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-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost.exe"	XWorm.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
4	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
3000	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2740	powershell.exe
2744	powershell.exe
2340	powershell.exe
3024	powershell.exe
1740	XWorm.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	1740	XWorm.exe
Token: SeDebugPrivilege	2740	powershell.exe
Token: SeDebugPrivilege	2744	powershell.exe
Token: SeDebugPrivilege	2340	powershell.exe
Token: SeDebugPrivilege	3024	powershell.exe
Token: SeDebugPrivilege	1740	XWorm.exe
Token: SeDebugPrivilege	1832	svchost.exe
Token: SeDebugPrivilege	1320	svchost.exe
Token: SeDebugPrivilege	2456	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1740	XWorm.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1740 wrote to memory of 2740	1740	XWorm.exe	32
PID 1740 wrote to memory of 2740	1740	XWorm.exe	32
PID 1740 wrote to memory of 2740	1740	XWorm.exe	32
PID 1740 wrote to memory of 2744	1740	XWorm.exe	34
PID 1740 wrote to memory of 2744	1740	XWorm.exe	34
PID 1740 wrote to memory of 2744	1740	XWorm.exe	34
PID 1740 wrote to memory of 2340	1740	XWorm.exe	36
PID 1740 wrote to memory of 2340	1740	XWorm.exe	36
PID 1740 wrote to memory of 2340	1740	XWorm.exe	36
PID 1740 wrote to memory of 3024	1740	XWorm.exe	38
PID 1740 wrote to memory of 3024	1740	XWorm.exe	38
PID 1740 wrote to memory of 3024	1740	XWorm.exe	38
PID 1740 wrote to memory of 3000	1740	XWorm.exe	40
PID 1740 wrote to memory of 3000	1740	XWorm.exe	40
PID 1740 wrote to memory of 3000	1740	XWorm.exe	40
PID 1208 wrote to memory of 1832	1208	taskeng.exe	43
PID 1208 wrote to memory of 1832	1208	taskeng.exe	43
PID 1208 wrote to memory of 1832	1208	taskeng.exe	43
PID 1208 wrote to memory of 1320	1208	taskeng.exe	44
PID 1208 wrote to memory of 1320	1208	taskeng.exe	44
PID 1208 wrote to memory of 1320	1208	taskeng.exe	44
PID 1208 wrote to memory of 2456	1208	taskeng.exe	45
PID 1208 wrote to memory of 2456	1208	taskeng.exe	45
PID 1208 wrote to memory of 2456	1208	taskeng.exe	45

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\XWorm.exe
"C:\Users\Admin\AppData\Local\Temp\XWorm.exe"
1⤵
- 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:1740
- 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\XWorm.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2740
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XWorm.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2744
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2340
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3024
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3000

C:\Windows\system32\taskeng.exe
taskeng.exe {45177AD1-CB8D-4C66-B232-D6D3B59B1557} S-1-5-21-3290804112-2823094203-3137964600-1000:VORHPBAB\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1208
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1832
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1320
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2456

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\svchost.exe

Filesize
9.1MB

MD5
76b8dd1cc4d42ceb68720da77fa05dab

SHA1
4594f0a2b104257123b72587226e0694ed410803

SHA256
7eacc3500da7eeebe2936d120ac8dbc56de6f1100b0ae77b13da5ee0850af4fb

SHA512
5d72ea084d0b611566eb7fc35e6994c5bfd475813739ca9f5909206c081179d94faf59f707c52f9cf60de44cd1a86a6796c5ed1fd51f20db2c31abec3b9d964e

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\WFQXPNG30HBV4X2K8JU3.temp

Filesize
7KB

MD5
5e8eb970f95065a35aad4f7a5607fa08

SHA1
cc1850899b1dcd5015ffe35c364de9042a427680

SHA256
01607012407ac553a0a724d692f3541a50be409ef8608ee04609661ca3024159

SHA512
053ed9299842efab9d3eaa6f06495efa3f764efaa7ebc59d28b1af0fd20aa96de5421f1975b00956a6227e0cdf66be034a800400f526fc2f1f2b3a3984810355

Download Submit
memory/1740-1-0x0000000000960000-0x0000000000998000-memory.dmp

Filesize
224KB

Download
memory/1740-2-0x000007FEF5B40000-0x000007FEF652C000-memory.dmp

Filesize
9.9MB

Download
memory/1740-3-0x000007FEF5B43000-0x000007FEF5B44000-memory.dmp

Filesize
4KB

Download
memory/1740-4-0x000007FEF5B40000-0x000007FEF652C000-memory.dmp

Filesize
9.9MB

Download
memory/1740-0-0x000007FEF5B43000-0x000007FEF5B44000-memory.dmp

Filesize
4KB

Download
memory/1832-37-0x00000000011B0000-0x00000000011E8000-memory.dmp

Filesize
224KB

Download
memory/2456-41-0x0000000001310000-0x0000000001348000-memory.dmp

Filesize
224KB

Download
memory/2740-10-0x000000001B610000-0x000000001B8F2000-memory.dmp

Filesize
2.9MB

Download
memory/2740-11-0x0000000001E90000-0x0000000001E98000-memory.dmp

Filesize
32KB

Download
memory/2740-9-0x0000000002D20000-0x0000000002DA0000-memory.dmp

Filesize
512KB

Download
memory/2744-18-0x0000000002A70000-0x0000000002A78000-memory.dmp

Filesize
32KB

Download
memory/2744-17-0x000000001B610000-0x000000001B8F2000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads