xworm | 12983048e2e21778b6db353a833f6ecd6a9745c2818d0968f9c882b1806681c1

General

Target

bXClient.exe
Size

42KB
MD5

1197a13638ec84ea69c38d0a789a66a2
SHA1

fc65c04ec53a09606c15055a7edc4a083190a418
SHA256

12983048e2e21778b6db353a833f6ecd6a9745c2818d0968f9c882b1806681c1
SHA512

12f62b6cea4f6346129d6c589d557d1481e43e749ebbd5d264ac925140da4b277560d4d75453a58847ad651562b5b230cd0650e968461a0f360054ec58b89fe5
SSDEEP

768:g/CsBpA2DYSPd6ls3AyZrl2F59g8qZOCh60R8lE9:g/C2d40wF59g8qZOCU1E9

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

https://pastebin.com/raw/0Pj9kgRk:1

Mutex

ZywUmpapVFNqLmrC

Attributes

Install_directory
%Userprofile%
install_file
msconfig.exe
pastebin_url
https://pastebin.com/raw/0Pj9kgRk

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/4068-1-0x0000000000BF0000-0x0000000000C00000-memory.dmp	family_xworm
behavioral1/files/0x0009000000023bd3-8.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	bXClient.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
4400	msconfig.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-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\msconfig = "C:\\Users\\Admin\\msconfig.exe"	bXClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 19 IoCs

Web Service

T1102

flow	ioc
33	pastebin.com
45	pastebin.com
48	pastebin.com
49	pastebin.com
15	pastebin.com
17	pastebin.com
32	pastebin.com
34	pastebin.com
55	pastebin.com
58	pastebin.com
59	pastebin.com
22	pastebin.com
51	pastebin.com
50	pastebin.com
52	pastebin.com
53	pastebin.com
54	pastebin.com
14	pastebin.com
26	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
396	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4068	bXClient.exe
Token: SeDebugPrivilege	4400	msconfig.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4068 wrote to memory of 396	4068	bXClient.exe	82
PID 4068 wrote to memory of 396	4068	bXClient.exe	82

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\bXClient.exe
"C:\Users\Admin\AppData\Local\Temp\bXClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4068
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "msconfig" /tr "C:\Users\Admin\msconfig.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:396

C:\Users\Admin\msconfig.exe
C:\Users\Admin\msconfig.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4400

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\msconfig.exe

Filesize
42KB

MD5
1197a13638ec84ea69c38d0a789a66a2

SHA1
fc65c04ec53a09606c15055a7edc4a083190a418

SHA256
12983048e2e21778b6db353a833f6ecd6a9745c2818d0968f9c882b1806681c1

SHA512
12f62b6cea4f6346129d6c589d557d1481e43e749ebbd5d264ac925140da4b277560d4d75453a58847ad651562b5b230cd0650e968461a0f360054ec58b89fe5

Download Submit
memory/4068-0-0x00007FFEF6563000-0x00007FFEF6565000-memory.dmp

Filesize
8KB

Download
memory/4068-1-0x0000000000BF0000-0x0000000000C00000-memory.dmp

Filesize
64KB

Download
memory/4068-6-0x00007FFEF6560000-0x00007FFEF7021000-memory.dmp

Filesize
10.8MB

Download
memory/4068-7-0x00007FFEF6560000-0x00007FFEF7021000-memory.dmp

Filesize
10.8MB

Download
memory/4400-10-0x00007FFEF6560000-0x00007FFEF7021000-memory.dmp

Filesize
10.8MB

Download
memory/4400-12-0x00007FFEF6560000-0x00007FFEF7021000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads