xworm | 7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12

General

Target

7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12N.exe
Size

66KB
MD5

2b494d570e8555cd6dbca8dadae59840
SHA1

c59544f6f3a027887f0e4b0cccce87515ba3950f
SHA256

7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12
SHA512

fe8ca241a512b55758e47e8962bfa1d3d1017559e199d21cbf07afc830d3460a9b6d0f868bfa7ea59979d254c6a29e4d18cf9ae25a6e5b7726a7eb514eb6ea5a
SSDEEP

1536:iKQYa5VddJ8rYtvAq9dAfkb15LU3v2D4oD0l8laOEeVHN:iKQYa5DdyEAq9d6kb15LU3A4ovaOEe5N

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
XClient.exe
pastebin_url
https://pastebin.com/raw/H3wFXmEi

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2224-1-0x00000000010D0000-0x00000000010E6000-memory.dmp	family_xworm
behavioral1/files/0x00090000000120f9-10.dat	family_xworm
behavioral1/memory/2484-12-0x0000000001220000-0x0000000001236000-memory.dmp	family_xworm

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

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12N.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12N.exe

Executes dropped EXE 2 IoCs

pid	Process
2484	XClient.exe
1900	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-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12N.exe

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

Web Service

T1102

flow	ioc
3	pastebin.com
2	pastebin.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
2844	schtasks.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2224	7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12N.exe
Token: SeDebugPrivilege	2484	XClient.exe
Token: SeDebugPrivilege	1900	XClient.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2224 wrote to memory of 2844	2224	7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12N.exe	31
PID 2224 wrote to memory of 2844	2224	7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12N.exe	31
PID 2224 wrote to memory of 2844	2224	7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12N.exe	31
PID 2464 wrote to memory of 2484	2464	taskeng.exe	34
PID 2464 wrote to memory of 2484	2464	taskeng.exe	34
PID 2464 wrote to memory of 2484	2464	taskeng.exe	34
PID 2464 wrote to memory of 1900	2464	taskeng.exe	36
PID 2464 wrote to memory of 1900	2464	taskeng.exe	36
PID 2464 wrote to memory of 1900	2464	taskeng.exe	36

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\7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12N.exe
"C:\Users\Admin\AppData\Local\Temp\7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12N.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2224
- 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:2844

C:\Windows\system32\taskeng.exe
taskeng.exe {415F7559-37C0-4B19-8EAB-573A2101A249} S-1-5-21-2039016743-699959520-214465309-1000:PIDEURYY\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2464
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2484
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1900

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
66KB

MD5
2b494d570e8555cd6dbca8dadae59840

SHA1
c59544f6f3a027887f0e4b0cccce87515ba3950f

SHA256
7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12

SHA512
fe8ca241a512b55758e47e8962bfa1d3d1017559e199d21cbf07afc830d3460a9b6d0f868bfa7ea59979d254c6a29e4d18cf9ae25a6e5b7726a7eb514eb6ea5a

Download Submit
memory/2224-0-0x000007FEF5593000-0x000007FEF5594000-memory.dmp

Filesize
4KB

Download
memory/2224-1-0x00000000010D0000-0x00000000010E6000-memory.dmp

Filesize
88KB

Download
memory/2224-6-0x000007FEF5590000-0x000007FEF5F7C000-memory.dmp

Filesize
9.9MB

Download
memory/2224-7-0x000007FEF5593000-0x000007FEF5594000-memory.dmp

Filesize
4KB

Download
memory/2224-8-0x000007FEF5590000-0x000007FEF5F7C000-memory.dmp

Filesize
9.9MB

Download
memory/2484-12-0x0000000001220000-0x0000000001236000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads