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 4 IoCs

resource	yara_rule
behavioral1/memory/2688-1-0x00000000001B0000-0x00000000001C6000-memory.dmp	family_xworm
behavioral1/files/0x000a00000001227e-9.dat	family_xworm
behavioral1/memory/2856-11-0x0000000000340000-0x0000000000356000-memory.dmp	family_xworm
behavioral1/memory/1432-14-0x0000000001380000-0x0000000001396000-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\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
2856	Matrix
1432	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-1-5-21-2872745919-2748461613-2989606286-1000\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
4	pastebin.com
5	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
2104	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2688	sexclientsiegheil1.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2688	sexclientsiegheil1.exe
Token: SeDebugPrivilege	2856	Matrix
Token: SeDebugPrivilege	1432	Matrix

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2688	sexclientsiegheil1.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2688 wrote to memory of 2104	2688	sexclientsiegheil1.exe	30
PID 2688 wrote to memory of 2104	2688	sexclientsiegheil1.exe	30
PID 2688 wrote to memory of 2104	2688	sexclientsiegheil1.exe	30
PID 2868 wrote to memory of 2856	2868	taskeng.exe	34
PID 2868 wrote to memory of 2856	2868	taskeng.exe	34
PID 2868 wrote to memory of 2856	2868	taskeng.exe	34
PID 2868 wrote to memory of 1432	2868	taskeng.exe	35
PID 2868 wrote to memory of 1432	2868	taskeng.exe	35
PID 2868 wrote to memory of 1432	2868	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\sexclientsiegheil1.exe
"C:\Users\Admin\AppData\Local\Temp\sexclientsiegheil1.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:2688
- 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:2104

C:\Windows\system32\taskeng.exe
taskeng.exe {2BDD05C3-E555-4A11-A6C6-7EFAD18B1B06} S-1-5-21-2872745919-2748461613-2989606286-1000:CCJBVTGQ\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2868
- C:\Users\Admin\AppData\Roaming\Matrix
  C:\Users\Admin\AppData\Roaming\Matrix
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2856
- C:\Users\Admin\AppData\Roaming\Matrix
  C:\Users\Admin\AppData\Roaming\Matrix
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1432

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

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Downloads

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

Filesize
65KB

MD5
446ccea41c7662e0e5e42b8973dddf6c

SHA1
d7a1fc984fe343bc1381bc1fd8193b849fdf0066

SHA256
3a77d5cb3177ac53062c5cc0dbdd844efa661c567588a62a3ecd2114f07ce22d

SHA512
2e36d6da44e0289577dca728c5c734cef5a0f94e7fff5447fb6739a9855013f20a2a015a7fcc021870ff54f20ae24a39691eef5d0ed35ccd73471076edba741c

Download Submit
memory/1432-14-0x0000000001380000-0x0000000001396000-memory.dmp

Filesize
88KB

Download
memory/2688-0-0x000007FEF5983000-0x000007FEF5984000-memory.dmp

Filesize
4KB

Download
memory/2688-1-0x00000000001B0000-0x00000000001C6000-memory.dmp

Filesize
88KB

Download
memory/2688-5-0x000007FEF5980000-0x000007FEF636C000-memory.dmp

Filesize
9.9MB

Download
memory/2688-6-0x000007FEF5983000-0x000007FEF5984000-memory.dmp

Filesize
4KB

Download
memory/2688-7-0x000007FEF5980000-0x000007FEF636C000-memory.dmp

Filesize
9.9MB

Download
memory/2856-11-0x0000000000340000-0x0000000000356000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads