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 2 IoCs

resource	yara_rule
behavioral2/memory/2740-1-0x0000000000020000-0x0000000000036000-memory.dmp	family_xworm
behavioral2/files/0x000f000000023a3f-8.dat	family_xworm

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

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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12N.exe

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
4252	XClient.exe
4020	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-1-5-21-4050598569-1597076380-177084960-1000\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
13	pastebin.com
14	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
1176	schtasks.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2740	7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12N.exe
Token: SeDebugPrivilege	4252	XClient.exe
Token: SeDebugPrivilege	4020	XClient.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2740 wrote to memory of 1176	2740	7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12N.exe	91
PID 2740 wrote to memory of 1176	2740	7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12N.exe	91

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⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2740
- 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:1176

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4252

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4020

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\XClient.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
66KB

MD5
2b494d570e8555cd6dbca8dadae59840

SHA1
c59544f6f3a027887f0e4b0cccce87515ba3950f

SHA256
7212825fd674cedb58ad3e6f72b312158c491386cc36b745cc04ad2617427e12

SHA512
fe8ca241a512b55758e47e8962bfa1d3d1017559e199d21cbf07afc830d3460a9b6d0f868bfa7ea59979d254c6a29e4d18cf9ae25a6e5b7726a7eb514eb6ea5a

Download Submit
memory/2740-0-0x00007FFEBA843000-0x00007FFEBA845000-memory.dmp

Filesize
8KB

Download
memory/2740-1-0x0000000000020000-0x0000000000036000-memory.dmp

Filesize
88KB

Download
memory/2740-6-0x00007FFEBA840000-0x00007FFEBB301000-memory.dmp

Filesize
10.8MB

Download
memory/2740-7-0x00007FFEBA840000-0x00007FFEBB301000-memory.dmp

Filesize
10.8MB

Download
memory/4252-10-0x00007FFEBA840000-0x00007FFEBB301000-memory.dmp

Filesize
10.8MB

Download
memory/4252-12-0x00007FFEBA840000-0x00007FFEBB301000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads