xworm | bf2a1a92ffd7238e9eb0c77acae216562e3eb01fec35a324a45e3fcb503dde29

General

Target

XBinder.exe
Size

820KB
MD5

90dcddcd355435afda38b6dad9ecd2fe
SHA1

2c2dda7074fe81c66567958a8c2d62cc48c49872
SHA256

bf2a1a92ffd7238e9eb0c77acae216562e3eb01fec35a324a45e3fcb503dde29
SHA512

6cf6237962f53322badd286991d3a5660691af0a8413a11e4200208830bc8c1a90da97c680d8808c97dd91ce33593f9774297089806a0bfea50531861735e249
SSDEEP

24576:9r/rjVJbC7vztZJIS002Kgp/nn6V9gDuBBYzu:57qx0ZnsiuLMu

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

147.185.221.22:7992

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x0007000000004e74-13.dat	family_xworm
behavioral1/memory/2812-21-0x0000000000950000-0x000000000098E000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2776	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2812	winrar.exe
2716	XBinder v2.exe
1192	Process not Found

Loads dropped DLL 2 IoCs

pid	Process
2688	XBinder.exe
1192	Process not Found

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Windows\CurrentVersion\Run\winrar = "C:\\Users\\Admin\\AppData\\Local\\Temp\\winrar.exe"	XBinder.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	winrar.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.

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

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
2804	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2776	powershell.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2716	XBinder v2.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2776	powershell.exe
Token: SeDebugPrivilege	2812	winrar.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2688 wrote to memory of 2776	2688	XBinder.exe	30
PID 2688 wrote to memory of 2776	2688	XBinder.exe	30
PID 2688 wrote to memory of 2776	2688	XBinder.exe	30
PID 2688 wrote to memory of 2804	2688	XBinder.exe	32
PID 2688 wrote to memory of 2804	2688	XBinder.exe	32
PID 2688 wrote to memory of 2804	2688	XBinder.exe	32
PID 2688 wrote to memory of 2812	2688	XBinder.exe	34
PID 2688 wrote to memory of 2812	2688	XBinder.exe	34
PID 2688 wrote to memory of 2812	2688	XBinder.exe	34
PID 2688 wrote to memory of 2716	2688	XBinder.exe	35
PID 2688 wrote to memory of 2716	2688	XBinder.exe	35
PID 2688 wrote to memory of 2716	2688	XBinder.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\XBinder.exe
"C:\Users\Admin\AppData\Local\Temp\XBinder.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2688
- 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\winrar.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2776
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /F /TN "winrar" /SC ONLOGON /TR "C:\Users\Admin\AppData\Local\Temp\winrar.exe" /RL HIGHEST
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2804
- C:\Users\Admin\AppData\Local\Temp\winrar.exe
  "C:\Users\Admin\AppData\Local\Temp\winrar.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  PID:2812
- C:\Users\Admin\AppData\Local\Temp\XBinder v2.exe
  "C:\Users\Admin\AppData\Local\Temp\XBinder v2.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: GetForegroundWindowSpam
  PID:2716

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

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

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\winrar.exe

Filesize
224KB

MD5
b8821aa050bb081e3ffe9d4f59b83cff

SHA1
a22a8a7806376f901b2fae8626c99afea6007bcc

SHA256
fbe7d57f6b706b47276707fcdaf995c9da5a429e3b173a49993c14fe71f423aa

SHA512
70b368c08eae455c5de6bf17218d565552dd438a5ab298138313312d0b6cb878e5794de3caab84e0d4fb01a1550848b6b2e298baf9e5fdc8d505579ced49ec25

Download Submit
\Users\Admin\AppData\Local\Temp\XBinder v2.exe

Filesize
3.5MB

MD5
a98358eb7f4953aa6d60015ccd8506ce

SHA1
d9be0c9d6d968c1baef11027a7ace6a0e869e75a

SHA256
21e0cc9ef715cc2147b9ec481b3fb876dbae8a4491367b478513128d7f7b8555

SHA512
62389e840c375a15d317d024d2e07b861b5b66447abb0423f603b73d2ec0853e3f947f78498a40dd835b48ca50562af9364c65c448a60172fa9011b6e564fac4

Download Submit
memory/2688-0-0x000007FEF5D03000-0x000007FEF5D04000-memory.dmp

Filesize
4KB

Download
memory/2688-1-0x0000000000D10000-0x0000000000DE2000-memory.dmp

Filesize
840KB

Download
memory/2716-22-0x00000644770D0000-0x000006447745E000-memory.dmp

Filesize
3.6MB

Download
memory/2716-23-0x0000000002200000-0x000000000229C000-memory.dmp

Filesize
624KB

Download
memory/2776-6-0x0000000002BC0000-0x0000000002C40000-memory.dmp

Filesize
512KB

Download
memory/2776-7-0x000000001B6D0000-0x000000001B9B2000-memory.dmp

Filesize
2.9MB

Download
memory/2776-8-0x0000000001D90000-0x0000000001D98000-memory.dmp

Filesize
32KB

Download
memory/2812-21-0x0000000000950000-0x000000000098E000-memory.dmp

Filesize
248KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads