xworm | f3e4d0ae62e681200fb759ba5717b8002bdebdfb5ad2ad92200ad62d03ad5a46

General

Target

7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe
Size

73KB
MD5

af9ff800562a87e5121cad94adb74471
SHA1

ccadb2b20a7ee0cffeffed04e415ca131a7c41bc
SHA256

7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246
SHA512

004d275549a7c0b8ba717a46c9a9b80ecc442db6dd868384a17ba797f1db8a64d6198317ffd28ca619c8fe3ffebb934eb9cb9b60486e8e5c79563206c9aaf892
SSDEEP

1536:q2H3hrFnT3fdHC0+aasbh0bkkNB/cxbRH6TTpH4ONThXiA:nXffdDznmbklxbCTpYOBhSA

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:56698

true-lung.gl.at.ply.gg:56698

Attributes

Install_directory
%Userprofile%
install_file
svhost.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2256-1-0x0000000000D30000-0x0000000000D48000-memory.dmp	family_xworm
behavioral1/files/0x001e000000016cab-36.dat	family_xworm
behavioral1/memory/2436-38-0x0000000001150000-0x0000000001168000-memory.dmp	family_xworm
behavioral1/memory/1992-40-0x00000000000E0000-0x00000000000F8000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
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
2172	powershell.exe
2836	powershell.exe
2304	powershell.exe
2932	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svhost.lnk	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svhost.lnk	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe

Executes dropped EXE 2 IoCs

pid	Process
2436	svhost.exe
1992	svhost.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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\svhost = "C:\\Users\\Admin\\svhost.exe"	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.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
1568	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2932	powershell.exe
2172	powershell.exe
2836	powershell.exe
2304	powershell.exe
2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe
Token: SeDebugPrivilege	2932	powershell.exe
Token: SeDebugPrivilege	2172	powershell.exe
Token: SeDebugPrivilege	2836	powershell.exe
Token: SeDebugPrivilege	2304	powershell.exe
Token: SeDebugPrivilege	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe
Token: SeDebugPrivilege	2436	svhost.exe
Token: SeDebugPrivilege	1992	svhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2256 wrote to memory of 2932	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe	31
PID 2256 wrote to memory of 2932	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe	31
PID 2256 wrote to memory of 2932	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe	31
PID 2256 wrote to memory of 2172	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe	33
PID 2256 wrote to memory of 2172	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe	33
PID 2256 wrote to memory of 2172	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe	33
PID 2256 wrote to memory of 2836	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe	35
PID 2256 wrote to memory of 2836	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe	35
PID 2256 wrote to memory of 2836	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe	35
PID 2256 wrote to memory of 2304	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe	37
PID 2256 wrote to memory of 2304	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe	37
PID 2256 wrote to memory of 2304	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe	37
PID 2256 wrote to memory of 1568	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe	39
PID 2256 wrote to memory of 1568	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe	39
PID 2256 wrote to memory of 1568	2256	7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe	39
PID 624 wrote to memory of 2436	624	taskeng.exe	42
PID 624 wrote to memory of 2436	624	taskeng.exe	42
PID 624 wrote to memory of 2436	624	taskeng.exe	42
PID 624 wrote to memory of 1992	624	taskeng.exe	43
PID 624 wrote to memory of 1992	624	taskeng.exe	43
PID 624 wrote to memory of 1992	624	taskeng.exe	43

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\7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe
"C:\Users\Admin\AppData\Local\Temp\7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.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:2256
- 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\7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2932
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2172
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\svhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2836
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2304
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svhost" /tr "C:\Users\Admin\svhost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1568

C:\Windows\system32\taskeng.exe
taskeng.exe {90967303-E61A-4E5E-8D34-EC167E215F9D} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:624
- C:\Users\Admin\svhost.exe
  C:\Users\Admin\svhost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2436
- C:\Users\Admin\svhost.exe
  C:\Users\Admin\svhost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1992

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\W1SIZD97BMBA2YO061YQ.temp

Filesize
7KB

MD5
7630acc3822f14b9a570a987e927f348

SHA1
7481c29b78a42d367c546bb4e94e565eac001b1a

SHA256
a8725e5049e898b73b19f9c6675a9341a57bbe81f1182b75de44a4dd9a384b9b

SHA512
59ef63cea4ed4afe1172fcc25401b545a3d183004049b62192f67ab1e2d45515ab5a79cd08c29fd04424db927be4479f8e4b52b0e1ac6e33b859056c72f67575

Download Submit
C:\Users\Admin\svhost.exe

Filesize
73KB

MD5
af9ff800562a87e5121cad94adb74471

SHA1
ccadb2b20a7ee0cffeffed04e415ca131a7c41bc

SHA256
7bcff120e45739b923e684e9c246e4c650cdfe3e5fe51399cfba6bcf932bd246

SHA512
004d275549a7c0b8ba717a46c9a9b80ecc442db6dd868384a17ba797f1db8a64d6198317ffd28ca619c8fe3ffebb934eb9cb9b60486e8e5c79563206c9aaf892

Download Submit
memory/1992-40-0x00000000000E0000-0x00000000000F8000-memory.dmp

Filesize
96KB

Download
memory/2172-14-0x000000001B2F0000-0x000000001B5D2000-memory.dmp

Filesize
2.9MB

Download
memory/2172-15-0x0000000002720000-0x0000000002728000-memory.dmp

Filesize
32KB

Download
memory/2256-0-0x000007FEF5163000-0x000007FEF5164000-memory.dmp

Filesize
4KB

Download
memory/2256-16-0x000007FEF5163000-0x000007FEF5164000-memory.dmp

Filesize
4KB

Download
memory/2256-29-0x000007FEF5160000-0x000007FEF5B4C000-memory.dmp

Filesize
9.9MB

Download
memory/2256-2-0x000007FEF5160000-0x000007FEF5B4C000-memory.dmp

Filesize
9.9MB

Download
memory/2256-1-0x0000000000D30000-0x0000000000D48000-memory.dmp

Filesize
96KB

Download
memory/2436-38-0x0000000001150000-0x0000000001168000-memory.dmp

Filesize
96KB

Download
memory/2932-8-0x00000000023A0000-0x00000000023A8000-memory.dmp

Filesize
32KB

Download
memory/2932-7-0x000000001B210000-0x000000001B4F2000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads