xworm | 60b290310f67adb0ae186b4b938ca466a6b55653b2519261fa425127f5500a1f

Resubmissions

12/09/2024, 02:23

240912-cvfznswere10

04/09/2024, 00:09

240904-afvheascla10

03/09/2024, 18:57

240903-xl8csavfrb10

03/09/2024, 18:12

240903-ws828asgnm10

Analysis

max time kernel
139s
max time network
146s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03/09/2024, 18:12

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General

Target
RAT/XClient.exe
Size 172KB
Sample240903-ws828asgnm
SHA256 75a8719e83e4aecbe51287d7bfaf1e334fa190c7784324f24bcf61ab984de20a
MD5 75ba783757c5b61bd841afa136fc3eda
SHA1 8db9cda9508471a23f9b743027fa115e01bc1fe1
SHA512 9a6cfbf4302336662527837bf60b30b458f8d438bd6e9563093d4948bf81c79d56578e965d836e90aafde553d1cdc9c6df81a254aafcfb3379fbe6405dce0ea1
SSDEEP 1536:vJcr5kCyoAp30kaF6CiJzt7UbjFdZe8e6TOAJkU7JsOpysa7iAMI:BcmNNxda6zZUbjHZe8jO6H2OpYuAf
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
XClient.exe
pastebin_url
https://pastebin.com/raw/2jTT3Lnj

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral7/memory/1032-1-0x0000000001320000-0x0000000001350000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2964	powershell.exe
296	powershell.exe
2728	powershell.exe
2736	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.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-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 5 IoCs

Web Service

T1102

flow	ioc
7	pastebin.com
8	7.tcp.eu.ngrok.io
16	7.tcp.eu.ngrok.io
27	7.tcp.eu.ngrok.io
6	pastebin.com

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
4	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2964	powershell.exe
296	powershell.exe
2728	powershell.exe
2736	powershell.exe
1032	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1032	XClient.exe
Token: SeDebugPrivilege	2964	powershell.exe
Token: SeDebugPrivilege	296	powershell.exe
Token: SeDebugPrivilege	2728	powershell.exe
Token: SeDebugPrivilege	2736	powershell.exe
Token: SeDebugPrivilege	1032	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1032	XClient.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1032 wrote to memory of 2964	1032	XClient.exe	29
PID 1032 wrote to memory of 2964	1032	XClient.exe	29
PID 1032 wrote to memory of 2964	1032	XClient.exe	29
PID 1032 wrote to memory of 296	1032	XClient.exe	31
PID 1032 wrote to memory of 296	1032	XClient.exe	31
PID 1032 wrote to memory of 296	1032	XClient.exe	31
PID 1032 wrote to memory of 2728	1032	XClient.exe	33
PID 1032 wrote to memory of 2728	1032	XClient.exe	33
PID 1032 wrote to memory of 2728	1032	XClient.exe	33
PID 1032 wrote to memory of 2736	1032	XClient.exe	35
PID 1032 wrote to memory of 2736	1032	XClient.exe	35
PID 1032 wrote to memory of 2736	1032	XClient.exe	35

C:\Users\Admin\AppData\Local\Temp\RAT\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\RAT\XClient.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:1032
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\RAT\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2964
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:296
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2728
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2736

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

NYBFBGOIB63ESNZ6GDSD.temp

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\NYBFBGOIB63ESNZ6GDSD.temp
Size 7KB
SHA256 6e9705a1e5dc4356eaba83b4fee8fa07e410831ee932b30608dc724e1de40aa7
MD5 d1ad499e60eb8af262e7d298416bbd67
SHA1 9157529c625d7e4a38d2b0a5182d532560846cbe
SHA512 05e7d5660ec58025707062150c8e4e6f772068ff75a1ec494099f8b9bcbabfa47f173efef75ae71aefe72eb692661a9b0c073cf13eaeb55280b0a22358821b5c
SSDEEP 96:0hKC5mQM8snqvsqvJCwo+hKC5mQM8snqvsEHyqvJCworU6DzQHRF7ppXlUVx:Mf/gUoSf/gAHnorUaIF7pp2
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/296-16-0x00000000028E0000-0x00000000028E8000-memory.dmp

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memory/296-15-0x000000001B5C0000-0x000000001B8A2000-memory.dmp

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memory/1032-0-0x000007FEF5C43000-0x000007FEF5C44000-memory.dmp

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memory/1032-1-0x0000000001320000-0x0000000001350000-memory.dmp

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memory/1032-2-0x000007FEF5C40000-0x000007FEF662C000-memory.dmp

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memory/1032-31-0x000007FEF5C43000-0x000007FEF5C44000-memory.dmp

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memory/1032-32-0x000007FEF5C40000-0x000007FEF662C000-memory.dmp

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memory/2964-7-0x0000000002A50000-0x0000000002AD0000-memory.dmp

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memory/2964-8-0x000000001B620000-0x000000001B902000-memory.dmp

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memory/2964-9-0x0000000002810000-0x0000000002818000-memory.dmp

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