xworm | ca5bd5a5db01187e93ae66419955d8fba2ced1d931aa92a68d3d5e62902cb354

General

Target

XClient.exe
Size

78KB
MD5

7eb269f7f290afa8910538c1ec7d64a3
SHA1

383581ff0f645d4bf44885ae4f588564fdaf9c56
SHA256

ca5bd5a5db01187e93ae66419955d8fba2ced1d931aa92a68d3d5e62902cb354
SHA512

f1ff2a0f3c03c89df818a3ba8f4a1cba6611c020457811923d45a31e81fa28e923f0a7b58cb9573df83fa132e35ba944549d47eef04ab0a7bd24365cfbcd4320
SSDEEP

1536:BRtRPsJhCmESLCohxNQtKBlLbH5Nc9KRc7/OofwRVDCKoSUQ:3zsfGo1BlLbHTcsQOoMVWQ

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
NVIDIAFrameview.exe
pastebin_url
https://pastebin.com/raw/UWpQULMP

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/5088-0-0x00000000002B0000-0x00000000002CA000-memory.dmp	family_xworm
behavioral1/files/0x00090000000004fe-7.dat	family_xworm

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
492	NVIDIAFrameview.exe
4776	NVIDIAFrameview.exe
1332	NVIDIAFrameview.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-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\NVIDIAFrameview = "C:\\Users\\Admin\\AppData\\Roaming\\NVIDIAFrameview.exe"	XClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
25	pastebin.com
26	pastebin.com
32	5.tcp.eu.ngrok.io

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
20	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

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/Job

T1053

pid	Process
4532	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
5088	XClient.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5088	XClient.exe
5088	XClient.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	5088	XClient.exe
Token: SeDebugPrivilege	5088	XClient.exe
Token: SeDebugPrivilege	492	NVIDIAFrameview.exe
Token: SeDebugPrivilege	4776	NVIDIAFrameview.exe
Token: SeDebugPrivilege	1332	NVIDIAFrameview.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5088	XClient.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 5088 wrote to memory of 4532	5088	XClient.exe	94
PID 5088 wrote to memory of 4532	5088	XClient.exe	94

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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5088
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "NVIDIAFrameview" /tr "C:\Users\Admin\AppData\Roaming\NVIDIAFrameview.exe"
  2⤵
  - Creates scheduled task(s)
  PID:4532

C:\Users\Admin\AppData\Roaming\NVIDIAFrameview.exe
C:\Users\Admin\AppData\Roaming\NVIDIAFrameview.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:492

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4080 --field-trial-handle=2328,i,5873823382323802923,13134441441264702821,262144 --variations-seed-version /prefetch:8
1⤵
PID:4268

C:\Users\Admin\AppData\Roaming\NVIDIAFrameview.exe
C:\Users\Admin\AppData\Roaming\NVIDIAFrameview.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4776

C:\Users\Admin\AppData\Roaming\NVIDIAFrameview.exe
C:\Users\Admin\AppData\Roaming\NVIDIAFrameview.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1332

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

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\NVIDIAFrameview.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Roaming\NVIDIAFrameview.exe

Filesize
78KB

MD5
7eb269f7f290afa8910538c1ec7d64a3

SHA1
383581ff0f645d4bf44885ae4f588564fdaf9c56

SHA256
ca5bd5a5db01187e93ae66419955d8fba2ced1d931aa92a68d3d5e62902cb354

SHA512
f1ff2a0f3c03c89df818a3ba8f4a1cba6611c020457811923d45a31e81fa28e923f0a7b58cb9573df83fa132e35ba944549d47eef04ab0a7bd24365cfbcd4320

Download Submit
memory/492-12-0x00007FFCE8BB0000-0x00007FFCE9671000-memory.dmp

Filesize
10.8MB

Download
memory/492-9-0x00007FFCE8BB0000-0x00007FFCE9671000-memory.dmp

Filesize
10.8MB

Download
memory/1332-20-0x00007FFCE8BB0000-0x00007FFCE9671000-memory.dmp

Filesize
10.8MB

Download
memory/1332-21-0x00007FFCE8BB0000-0x00007FFCE9671000-memory.dmp

Filesize
10.8MB

Download
memory/4776-17-0x00007FFCE8BB0000-0x00007FFCE9671000-memory.dmp

Filesize
10.8MB

Download
memory/4776-18-0x00007FFCE8BB0000-0x00007FFCE9671000-memory.dmp

Filesize
10.8MB

Download
memory/5088-2-0x000000001B100000-0x000000001B110000-memory.dmp

Filesize
64KB

Download
memory/5088-10-0x00007FFCE8BB0000-0x00007FFCE9671000-memory.dmp

Filesize
10.8MB

Download
memory/5088-0-0x00000000002B0000-0x00000000002CA000-memory.dmp

Filesize
104KB

Download
memory/5088-13-0x000000001B100000-0x000000001B110000-memory.dmp

Filesize
64KB

Download
memory/5088-1-0x00007FFCE8BB0000-0x00007FFCE9671000-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