xworm | 58b4314ae0919aacee0a66e66713ae5f4c4bf94fba4ec8004ca000080be143e4

General

Target

XClient4.exe
Size

39KB
MD5

b414b4fbe0b2345d1d81e58df98171bc
SHA1

fb4f495bb1f3727d696ebe284df51e5338fdd131
SHA256

58b4314ae0919aacee0a66e66713ae5f4c4bf94fba4ec8004ca000080be143e4
SHA512

3de3e9b3b526d7688873a2cf14169f479c531e41f7ff1b0d07e0d5c6e7f49c09c81a5183f816f9b8add199c64e6f0ab8ef8615b91096910a361cc5be4453e091
SSDEEP

768:w3MosUxgIsB5AcksKyJjL77FWPa9Xa+d9OwhLaG86:4MozTE5A72Fv9Xtd9OwVT86

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

127.0.0.1:7000

tell-outcome.gl.at.ply.gg:7000

Mutex

yBZptJO9KOSBj0YC

Attributes

Install_directory
%AppData%
install_file
FileExplorer.exe

aes.plain

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2520-1-0x0000000000AF0000-0x0000000000B00000-memory.dmp	family_xworm
behavioral1/files/0x0007000000012117-11.dat	family_xworm
behavioral1/memory/2660-13-0x0000000001190000-0x00000000011A0000-memory.dmp	family_xworm
behavioral1/memory/1596-15-0x0000000001310000-0x0000000001320000-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\FileExplorer.lnk	XClient4.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FileExplorer.lnk	XClient4.exe

Executes dropped EXE 2 IoCs

pid	Process
2660	FileExplorer.exe
1596	FileExplorer.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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\FileExplorer = "C:\\Users\\Admin\\AppData\\Roaming\\FileExplorer.exe"	XClient4.exe

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
2408	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2520	XClient4.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2520	XClient4.exe
Token: SeDebugPrivilege	2520	XClient4.exe
Token: SeDebugPrivilege	2660	FileExplorer.exe
Token: SeDebugPrivilege	1596	FileExplorer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2520	XClient4.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 2408	2520	XClient4.exe	30
PID 2520 wrote to memory of 2408	2520	XClient4.exe	30
PID 2520 wrote to memory of 2408	2520	XClient4.exe	30
PID 2596 wrote to memory of 2660	2596	taskeng.exe	34
PID 2596 wrote to memory of 2660	2596	taskeng.exe	34
PID 2596 wrote to memory of 2660	2596	taskeng.exe	34
PID 2596 wrote to memory of 1596	2596	taskeng.exe	35
PID 2596 wrote to memory of 1596	2596	taskeng.exe	35
PID 2596 wrote to memory of 1596	2596	taskeng.exe	35

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\XClient4.exe
"C:\Users\Admin\AppData\Local\Temp\XClient4.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:2520
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "FileExplorer" /tr "C:\Users\Admin\AppData\Roaming\FileExplorer.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2408

C:\Windows\system32\taskeng.exe
taskeng.exe {0A75E8AF-BDBE-462B-B4E2-11F3EBA6191E} S-1-5-21-2872745919-2748461613-2989606286-1000:CCJBVTGQ\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2596
- C:\Users\Admin\AppData\Roaming\FileExplorer.exe
  C:\Users\Admin\AppData\Roaming\FileExplorer.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2660
- C:\Users\Admin\AppData\Roaming\FileExplorer.exe
  C:\Users\Admin\AppData\Roaming\FileExplorer.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1596

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

Exfiltration

Impact

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Downloads

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

Filesize
39KB

MD5
b414b4fbe0b2345d1d81e58df98171bc

SHA1
fb4f495bb1f3727d696ebe284df51e5338fdd131

SHA256
58b4314ae0919aacee0a66e66713ae5f4c4bf94fba4ec8004ca000080be143e4

SHA512
3de3e9b3b526d7688873a2cf14169f479c531e41f7ff1b0d07e0d5c6e7f49c09c81a5183f816f9b8add199c64e6f0ab8ef8615b91096910a361cc5be4453e091

Download Submit
memory/1596-15-0x0000000001310000-0x0000000001320000-memory.dmp

Filesize
64KB

Download
memory/2520-0-0x000007FEF4FC3000-0x000007FEF4FC4000-memory.dmp

Filesize
4KB

Download
memory/2520-1-0x0000000000AF0000-0x0000000000B00000-memory.dmp

Filesize
64KB

Download
memory/2520-6-0x000007FEF4FC0000-0x000007FEF59AC000-memory.dmp

Filesize
9.9MB

Download
memory/2520-7-0x000007FEF4FC3000-0x000007FEF4FC4000-memory.dmp

Filesize
4KB

Download
memory/2520-8-0x000007FEF4FC0000-0x000007FEF59AC000-memory.dmp

Filesize
9.9MB

Download
memory/2660-13-0x0000000001190000-0x00000000011A0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads