xworm | 011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a

General

Target

011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe
Size

85KB
MD5

5636cc262a1ea73f360534991aa1583d
SHA1

217f76c8ba5f9ed4e3ce437a7998c9892ec5740c
SHA256

011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a
SHA512

6d0004c9706a92f7777034d4d108a2eba8d1864468f71b03da319842bba9d0611b9fad53502d03b3bddf6b8ebecee70912c954db94a1fe581d29c49069adfc35
SSDEEP

1536:1nP61US1NLpoocGqsd+eC/b4ukt6L4QbHCaE6VOfBOrvSxnb1M+dXS:NP1elOoch2+xbhkpQbHPOJO7ObmqS

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
XClient.exe
pastebin_url
https://pastebin.com/raw/Hzb9qrsF

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2532-1-0x0000000000EE0000-0x0000000000EFC000-memory.dmp	family_xworm
behavioral1/files/0x000f000000015ceb-34.dat	family_xworm
behavioral1/memory/1656-36-0x0000000000CE0000-0x0000000000CFC000-memory.dmp	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
2052	powershell.exe
2792	powershell.exe
2340	powershell.exe
2780	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe

Executes dropped EXE 2 IoCs

pid	Process
1656	XClient.exe
1084	XClient.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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
6	pastebin.com
7	pastebin.com

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
1828	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2780	powershell.exe
2052	powershell.exe
2792	powershell.exe
2340	powershell.exe
2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe
Token: SeDebugPrivilege	2780	powershell.exe
Token: SeDebugPrivilege	2052	powershell.exe
Token: SeDebugPrivilege	2792	powershell.exe
Token: SeDebugPrivilege	2340	powershell.exe
Token: SeDebugPrivilege	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe
Token: SeDebugPrivilege	1656	XClient.exe
Token: SeDebugPrivilege	1084	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2532 wrote to memory of 2780	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe	32
PID 2532 wrote to memory of 2780	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe	32
PID 2532 wrote to memory of 2780	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe	32
PID 2532 wrote to memory of 2052	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe	34
PID 2532 wrote to memory of 2052	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe	34
PID 2532 wrote to memory of 2052	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe	34
PID 2532 wrote to memory of 2792	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe	36
PID 2532 wrote to memory of 2792	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe	36
PID 2532 wrote to memory of 2792	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe	36
PID 2532 wrote to memory of 2340	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe	38
PID 2532 wrote to memory of 2340	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe	38
PID 2532 wrote to memory of 2340	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe	38
PID 2532 wrote to memory of 1828	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe	40
PID 2532 wrote to memory of 1828	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe	40
PID 2532 wrote to memory of 1828	2532	011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe	40
PID 1644 wrote to memory of 1656	1644	taskeng.exe	43
PID 1644 wrote to memory of 1656	1644	taskeng.exe	43
PID 1644 wrote to memory of 1656	1644	taskeng.exe	43
PID 1644 wrote to memory of 1084	1644	taskeng.exe	45
PID 1644 wrote to memory of 1084	1644	taskeng.exe	45
PID 1644 wrote to memory of 1084	1644	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\011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe
"C:\Users\Admin\AppData\Local\Temp\011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.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:2532
- 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\011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2780
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2052
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2792
- 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:2340
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1828

C:\Windows\system32\taskeng.exe
taskeng.exe {5D6D595B-035B-480A-B55A-EFDA2F54D5FA} S-1-5-21-312935884-697965778-3955649944-1000:MXQFNXLT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1644
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1656
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1084

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
7880e28ab8038fe05b32289fd64b336c

SHA1
055674daa6479de4862f72ae0bd149c28a39d3db

SHA256
c67c1c1973137ecd5904c5ad29592137cc039c66303b717241da1a9d0f7c91d7

SHA512
c05b4a1e0de303195d08b0eb605e4bba07dac5d624f5f37a87dc2972fd78889ca627b5b3b242e18022d5d1e119a4e03278882dbcaf24919a393ff3cec67ef4f8

Download Submit
C:\Users\Admin\AppData\Roaming\XClient.exe

Filesize
85KB

MD5
5636cc262a1ea73f360534991aa1583d

SHA1
217f76c8ba5f9ed4e3ce437a7998c9892ec5740c

SHA256
011753470736e81b7f8d17e0a9739f61f2fabd3211ae36584d2d57bbb3ea596a

SHA512
6d0004c9706a92f7777034d4d108a2eba8d1864468f71b03da319842bba9d0611b9fad53502d03b3bddf6b8ebecee70912c954db94a1fe581d29c49069adfc35

Download Submit
memory/1656-36-0x0000000000CE0000-0x0000000000CFC000-memory.dmp

Filesize
112KB

Download
memory/2052-16-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/2052-15-0x000000001B710000-0x000000001B9F2000-memory.dmp

Filesize
2.9MB

Download
memory/2532-27-0x000007FEF5413000-0x000007FEF5414000-memory.dmp

Filesize
4KB

Download
memory/2532-0-0x000007FEF5413000-0x000007FEF5414000-memory.dmp

Filesize
4KB

Download
memory/2532-32-0x000007FEF5410000-0x000007FEF5DFC000-memory.dmp

Filesize
9.9MB

Download
memory/2532-2-0x000007FEF5410000-0x000007FEF5DFC000-memory.dmp

Filesize
9.9MB

Download
memory/2532-1-0x0000000000EE0000-0x0000000000EFC000-memory.dmp

Filesize
112KB

Download
memory/2780-9-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/2780-8-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/2780-7-0x0000000002A50000-0x0000000002AD0000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads