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

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

Processes:

4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000\Control Panel\International\Geo\Nation	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

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

Executes dropped EXE 2 IoCs

Processes:

4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

pid	process
2476	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
216	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-1-5-21-4238149048-355649189-894321705-1000\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

18 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

2880 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

pid process

2444 4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

flow	ioc
18	ip-api.com

pid	process
2880	schtasks.exe

pid	process
2444	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

description	pid	process
Token: SeDebugPrivilege	2444	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
Token: SeDebugPrivilege	2444	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
Token: SeDebugPrivilege	2476	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
Token: SeDebugPrivilege	216	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

pid process

2444 4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

pid	process
2444	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

description	pid	process	target process
PID 2444 wrote to memory of 2880	2444	4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe	schtasks.exe
PID 2444 wrote to memory of 2880	2444	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⤵
- 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:2444
- 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:2880

C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2476

C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:216

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

Filesize
66KB

MD5
8682c4dc2e3ae57079e9ada0943b813d

SHA1
d855ac963756f24d67297c1c9b94b86d6e5350ba

SHA256
4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22

SHA512
a7eb2a5db32d0b96e0bc761454bf9bc40bde24ff8a6eab52c799d6438c2e64d1b0fb914a75b34256e488f76b9ec7423eea82537a772f599b8e02e8199c8e5ace

Download Submit
C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

Filesize
66KB

MD5
8682c4dc2e3ae57079e9ada0943b813d

SHA1
d855ac963756f24d67297c1c9b94b86d6e5350ba

SHA256
4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22

SHA512
a7eb2a5db32d0b96e0bc761454bf9bc40bde24ff8a6eab52c799d6438c2e64d1b0fb914a75b34256e488f76b9ec7423eea82537a772f599b8e02e8199c8e5ace

Download Submit
C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

Filesize
66KB

MD5
8682c4dc2e3ae57079e9ada0943b813d

SHA1
d855ac963756f24d67297c1c9b94b86d6e5350ba

SHA256
4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22

SHA512
a7eb2a5db32d0b96e0bc761454bf9bc40bde24ff8a6eab52c799d6438c2e64d1b0fb914a75b34256e488f76b9ec7423eea82537a772f599b8e02e8199c8e5ace

Download Submit
C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

Filesize
66KB

MD5
8682c4dc2e3ae57079e9ada0943b813d

SHA1
d855ac963756f24d67297c1c9b94b86d6e5350ba

SHA256
4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22

SHA512
a7eb2a5db32d0b96e0bc761454bf9bc40bde24ff8a6eab52c799d6438c2e64d1b0fb914a75b34256e488f76b9ec7423eea82537a772f599b8e02e8199c8e5ace

Download Submit
memory/2444-133-0x0000000000B40000-0x0000000000B56000-memory.dmp

Filesize
88KB

Download
memory/2444-134-0x000000001B810000-0x000000001B820000-memory.dmp

Filesize
64KB

Download
memory/2444-143-0x000000001B810000-0x000000001B820000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads