xworm | af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807

General

Target

af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe
Size

238KB
MD5

a3f033788623e354934c5bd0d2e532ab
SHA1

0356845c39af18ffbc03b1262278badcd8875437
SHA256

af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807
SHA512

bfb042dcdc18e9af463140f134de3e349561f8f70c31864686a759683838cef0011337394ee19d0f0cdfd62cacb40bbc165afc8232213f64a11f3b15cf17d4d5
SSDEEP

6144:VJW3bxeS3krUhcX7elbKTua9bfF/H9d9n:4eSUr3X3u+

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

45.141.27.242:7777

Attributes

Install_directory
%Temp%
install_file
conhost.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2940-1-0x00000000001F0000-0x0000000000230000-memory.dmp	family_xworm
behavioral1/files/0x000d000000012259-35.dat	family_xworm
behavioral1/memory/1952-37-0x00000000011C0000-0x0000000001200000-memory.dmp	family_xworm
behavioral1/memory/748-40-0x00000000013B0000-0x00000000013F0000-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
2592	powershell.exe
472	powershell.exe
1856	powershell.exe
1972	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\conhost.lnk	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\conhost.lnk	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe

Executes dropped EXE 2 IoCs

pid	Process
1952	conhost.exe
748	conhost.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-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\conhost = "C:\\Users\\Admin\\AppData\\Local\\Temp\\conhost.exe"	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.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
2020	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2592	powershell.exe
472	powershell.exe
1856	powershell.exe
1972	powershell.exe
2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe
Token: SeDebugPrivilege	2592	powershell.exe
Token: SeDebugPrivilege	472	powershell.exe
Token: SeDebugPrivilege	1856	powershell.exe
Token: SeDebugPrivilege	1972	powershell.exe
Token: SeDebugPrivilege	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe
Token: SeDebugPrivilege	1952	conhost.exe
Token: SeDebugPrivilege	748	conhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2940 wrote to memory of 2592	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe	31
PID 2940 wrote to memory of 2592	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe	31
PID 2940 wrote to memory of 2592	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe	31
PID 2940 wrote to memory of 472	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe	33
PID 2940 wrote to memory of 472	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe	33
PID 2940 wrote to memory of 472	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe	33
PID 2940 wrote to memory of 1856	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe	35
PID 2940 wrote to memory of 1856	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe	35
PID 2940 wrote to memory of 1856	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe	35
PID 2940 wrote to memory of 1972	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe	37
PID 2940 wrote to memory of 1972	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe	37
PID 2940 wrote to memory of 1972	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe	37
PID 2940 wrote to memory of 2020	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe	39
PID 2940 wrote to memory of 2020	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe	39
PID 2940 wrote to memory of 2020	2940	af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe	39
PID 2256 wrote to memory of 1952	2256	taskeng.exe	43
PID 2256 wrote to memory of 1952	2256	taskeng.exe	43
PID 2256 wrote to memory of 1952	2256	taskeng.exe	43
PID 2256 wrote to memory of 748	2256	taskeng.exe	44
PID 2256 wrote to memory of 748	2256	taskeng.exe	44
PID 2256 wrote to memory of 748	2256	taskeng.exe	44

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\af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe
"C:\Users\Admin\AppData\Local\Temp\af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.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:2940
- 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\af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2592
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:472
- 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\conhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1856
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'conhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1972
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "conhost" /tr "C:\Users\Admin\AppData\Local\Temp\conhost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2020

C:\Windows\system32\taskeng.exe
taskeng.exe {7F55CDD5-937E-4B9F-BDD4-93E7ECD62C25} S-1-5-21-3533259084-2542256011-65585152-1000:XPAJOTIY\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2256
- C:\Users\Admin\AppData\Local\Temp\conhost.exe
  C:\Users\Admin\AppData\Local\Temp\conhost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1952
- C:\Users\Admin\AppData\Local\Temp\conhost.exe
  C:\Users\Admin\AppData\Local\Temp\conhost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:748

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\conhost.exe

Filesize
238KB

MD5
a3f033788623e354934c5bd0d2e532ab

SHA1
0356845c39af18ffbc03b1262278badcd8875437

SHA256
af6abc818434e7e0fb9205d31918243b17d843c38e3148ec78172fb6a9d2d807

SHA512
bfb042dcdc18e9af463140f134de3e349561f8f70c31864686a759683838cef0011337394ee19d0f0cdfd62cacb40bbc165afc8232213f64a11f3b15cf17d4d5

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

Filesize
7KB

MD5
f2b3a5d8ace4afc05f50a7622a01eedf

SHA1
d735ef2f4936423c996ad8f2690f35ba182b4fa1

SHA256
a390267e1d308b76f1020e22dbcddf45942b7118fd2a405d8ab680a490dfdf6c

SHA512
e9dae1f7b0b3503b2234d275dd5bf7aaa85cd611caa9e72047e974ed3c4576a9bcbd07f8667eda0c64cc9f8d58739d23ed97688dc167a35586326172ed50b2de

Download Submit
memory/472-15-0x000000001B730000-0x000000001BA12000-memory.dmp

Filesize
2.9MB

Download
memory/472-16-0x0000000001E90000-0x0000000001E98000-memory.dmp

Filesize
32KB

Download
memory/748-40-0x00000000013B0000-0x00000000013F0000-memory.dmp

Filesize
256KB

Download
memory/1952-37-0x00000000011C0000-0x0000000001200000-memory.dmp

Filesize
256KB

Download
memory/2592-7-0x0000000002DE0000-0x0000000002E60000-memory.dmp

Filesize
512KB

Download
memory/2592-9-0x0000000000310000-0x0000000000318000-memory.dmp

Filesize
32KB

Download
memory/2592-8-0x000000001B7B0000-0x000000001BA92000-memory.dmp

Filesize
2.9MB

Download
memory/2940-27-0x000007FEF4E83000-0x000007FEF4E84000-memory.dmp

Filesize
4KB

Download
memory/2940-33-0x000007FEF4E80000-0x000007FEF586C000-memory.dmp

Filesize
9.9MB

Download
memory/2940-0-0x000007FEF4E83000-0x000007FEF4E84000-memory.dmp

Filesize
4KB

Download
memory/2940-2-0x000007FEF4E80000-0x000007FEF586C000-memory.dmp

Filesize
9.9MB

Download
memory/2940-1-0x00000000001F0000-0x0000000000230000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads