xworm | 3a77d5cb3177ac53062c5cc0dbdd844efa661c567588a62a3ecd2114f07ce22d

General

Target

sexclientsiegheil1.exe
Size

65KB
MD5

446ccea41c7662e0e5e42b8973dddf6c
SHA1

d7a1fc984fe343bc1381bc1fd8193b849fdf0066
SHA256

3a77d5cb3177ac53062c5cc0dbdd844efa661c567588a62a3ecd2114f07ce22d
SHA512

2e36d6da44e0289577dca728c5c734cef5a0f94e7fff5447fb6739a9855013f20a2a015a7fcc021870ff54f20ae24a39691eef5d0ed35ccd73471076edba741c
SSDEEP

1536:oeLK+ZR+gq5PTEVjP+b94PItjHPpjBRqFP9OTUF:hvZRhVjP+bqCjHPpfqTOTy

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
USB.exe
pastebin_url
https://pastebin.com/raw/p1KPLDhy

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/3092-1-0x0000000000710000-0x0000000000726000-memory.dmp	family_xworm
behavioral2/files/0x001100000001e452-8.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-1-5-21-1874072718-2205492803-118941907-1000\Control Panel\International\Geo\Nation	sexclientsiegheil1.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Matrix.lnk	sexclientsiegheil1.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Matrix.lnk	sexclientsiegheil1.exe

Executes dropped EXE 2 IoCs

pid	Process
2524	Matrix
5116	Matrix

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-1-5-21-1874072718-2205492803-118941907-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Matrix = "C:\\Users\\Admin\\AppData\\Roaming\\Matrix"	sexclientsiegheil1.exe

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

Web Service

T1102

flow	ioc
25	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
3708	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3092	sexclientsiegheil1.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3092	sexclientsiegheil1.exe
Token: SeDebugPrivilege	2524	Matrix
Token: SeDebugPrivilege	5116	Matrix

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3092	sexclientsiegheil1.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3092 wrote to memory of 3708	3092	sexclientsiegheil1.exe	92
PID 3092 wrote to memory of 3708	3092	sexclientsiegheil1.exe	92

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\sexclientsiegheil1.exe
"C:\Users\Admin\AppData\Local\Temp\sexclientsiegheil1.exe"
1⤵
- Checks computer location settings
- 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:3092
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Matrix" /tr "C:\Users\Admin\AppData\Roaming\Matrix"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3708

C:\Users\Admin\AppData\Roaming\Matrix
C:\Users\Admin\AppData\Roaming\Matrix
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2524

C:\Users\Admin\AppData\Roaming\Matrix
C:\Users\Admin\AppData\Roaming\Matrix
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5116

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\Matrix.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Roaming\Matrix

Filesize
65KB

MD5
446ccea41c7662e0e5e42b8973dddf6c

SHA1
d7a1fc984fe343bc1381bc1fd8193b849fdf0066

SHA256
3a77d5cb3177ac53062c5cc0dbdd844efa661c567588a62a3ecd2114f07ce22d

SHA512
2e36d6da44e0289577dca728c5c734cef5a0f94e7fff5447fb6739a9855013f20a2a015a7fcc021870ff54f20ae24a39691eef5d0ed35ccd73471076edba741c

Download Submit
memory/2524-10-0x00007FFE6E950000-0x00007FFE6F411000-memory.dmp

Filesize
10.8MB

Download
memory/2524-12-0x00007FFE6E950000-0x00007FFE6F411000-memory.dmp

Filesize
10.8MB

Download
memory/3092-0-0x00007FFE6E953000-0x00007FFE6E955000-memory.dmp

Filesize
8KB

Download
memory/3092-1-0x0000000000710000-0x0000000000726000-memory.dmp

Filesize
88KB

Download
memory/3092-5-0x00007FFE6E950000-0x00007FFE6F411000-memory.dmp

Filesize
10.8MB

Download
memory/3092-6-0x00007FFE6E953000-0x00007FFE6E955000-memory.dmp

Filesize
8KB

Download
memory/3092-7-0x00007FFE6E950000-0x00007FFE6F411000-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