xworm | 9a05cdb4522f87a43ecbbd7cf4de4e6ee9d84b114c7d3430ac86891df6836eda

General

Target

4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
Size

66KB
MD5

8682c4dc2e3ae57079e9ada0943b813d
SHA1

d855ac963756f24d67297c1c9b94b86d6e5350ba
SHA256

4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22
SHA512

a7eb2a5db32d0b96e0bc761454bf9bc40bde24ff8a6eab52c799d6438c2e64d1b0fb914a75b34256e488f76b9ec7423eea82537a772f599b8e02e8199c8e5ace
SSDEEP

1536:Yd077VI2kTksimD7A9sb0sBmaOu8EJSRK:Z9kT5imD7Osb0umaOuxGK

Score

10^/10

xworm persistence rat trojan

Malware Config

Signatures

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

Drops startup file 2 IoCs

Processes:

4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.lnk	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.lnk	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Windows\CurrentVersion\Run\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22 = "C:\\Users\\Admin\\AppData\\Roaming\\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe"	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

3 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1376 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

pid process

1616 4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

flow	ioc
3	ip-api.com

pid	process
1376	schtasks.exe

pid	process
1616	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

description	pid	process
Token: SeDebugPrivilege	1616	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
Token: SeDebugPrivilege	1616	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

pid process

1616 4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

pid	process
1616	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

description	pid	process	target process
PID 1616 wrote to memory of 1376	1616	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe	schtasks.exe
PID 1616 wrote to memory of 1376	1616	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe	schtasks.exe
PID 1616 wrote to memory of 1376	1616	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe	schtasks.exe

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\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
"C:\Users\Admin\AppData\Local\Temp\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.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:1616
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22" /tr "C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe"
  2⤵
  - Creates scheduled task(s)
  PID:1376

C:\Windows\system32\taskeng.exe
taskeng.exe {F91E6BC5-EC48-4A73-B20B-9094FDB522AC} S-1-5-21-1563773381-2037468142-1146002597-1000:YBHADZIG\Admin:Interactive:[1]
1⤵
PID:1508

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

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

memory/1616-54-0x0000000001090000-0x00000000010A6000-memory.dmp

Filesize
88KB

Download
memory/1616-55-0x000000001B150000-0x000000001B1D0000-memory.dmp

Filesize
512KB

Download
memory/1616-59-0x000000001B150000-0x000000001B1D0000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads