xworm | 3ac3efee88adab86a250a53dd9448453fcc4223662f5c6c21453606b6eb91b77

General

Target

Windows Shell Experience Host.exe
Size

86KB
MD5

17f122079462e212871a1e2eb20eaff9
SHA1

349e4b54323acce835916a2bbe40dc9c5d30931f
SHA256

f483197df60b8767d23fa820efaab0c6bcc3a4b02ebee3c8f1290ef699f6697e
SHA512

95548cb30e9e45c4024be181253200d2188b622754158f6268fa09e41327dbb8468399a1b5ddd9d868413638bf1b9b18f6814586530f2c6a0a6cbd6311234e94
SSDEEP

768:NG9nICDiZGhCMhOB0s1SbiFG9Ox7h86BOMhUL02dC+IHZK:NgICDiZQRhVeFG9e7h86BOM+Nd6c

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

147.185.221.20:65300

Mutex

RMe1pa1UgjNcB2Un

Attributes

Install_directory
%AppData%
install_file
Windows Shell Experience Host.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral7/memory/1824-1-0x0000000000CD0000-0x0000000000CEA000-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
2760	powershell.exe
3008	powershell.exe
2948	powershell.exe
3032	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows Shell Experience Host.lnk	Windows Shell Experience Host.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows Shell Experience Host.lnk	Windows Shell Experience Host.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Shell Experience Host = "C:\\Users\\Admin\\AppData\\Roaming\\Windows Shell Experience Host.exe"	Windows Shell Experience Host.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

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2948	powershell.exe
3032	powershell.exe
2760	powershell.exe
3008	powershell.exe
1824	Windows Shell Experience Host.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1824	Windows Shell Experience Host.exe
Token: SeDebugPrivilege	2948	powershell.exe
Token: SeDebugPrivilege	3032	powershell.exe
Token: SeDebugPrivilege	2760	powershell.exe
Token: SeDebugPrivilege	3008	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1824	Windows Shell Experience Host.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1824 wrote to memory of 2948	1824	Windows Shell Experience Host.exe	29
PID 1824 wrote to memory of 2948	1824	Windows Shell Experience Host.exe	29
PID 1824 wrote to memory of 2948	1824	Windows Shell Experience Host.exe	29
PID 1824 wrote to memory of 3032	1824	Windows Shell Experience Host.exe	31
PID 1824 wrote to memory of 3032	1824	Windows Shell Experience Host.exe	31
PID 1824 wrote to memory of 3032	1824	Windows Shell Experience Host.exe	31
PID 1824 wrote to memory of 2760	1824	Windows Shell Experience Host.exe	33
PID 1824 wrote to memory of 2760	1824	Windows Shell Experience Host.exe	33
PID 1824 wrote to memory of 2760	1824	Windows Shell Experience Host.exe	33
PID 1824 wrote to memory of 3008	1824	Windows Shell Experience Host.exe	35
PID 1824 wrote to memory of 3008	1824	Windows Shell Experience Host.exe	35
PID 1824 wrote to memory of 3008	1824	Windows Shell Experience Host.exe	35

C:\Users\Admin\AppData\Local\Temp\Windows Shell Experience Host.exe
"C:\Users\Admin\AppData\Local\Temp\Windows Shell Experience Host.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:1824
- 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\Windows Shell Experience Host.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2948
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Windows Shell Experience Host.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3032
- 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\Windows Shell Experience Host.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2760
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Windows Shell Experience Host.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3008

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

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\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
892efa2e036be144cf5299c38020ee87

SHA1
1143a36e093a35d5ef9cdc7c3013e6336e482695

SHA256
77611b3198113ac6d7c6101ed25d54325f14fc3b543e9988f950535c0443c800

SHA512
66303cdde2bb9a7024954a17381025cc9914eef2b5445ea5e3f1e659967e16dca1ea6e775c6bb1c070919899c41e99003c8e5acc7c05945f5af6c2a72fedd5aa

Download Submit
memory/1824-0-0x000007FEF64A3000-0x000007FEF64A4000-memory.dmp

Filesize
4KB

Download
memory/1824-1-0x0000000000CD0000-0x0000000000CEA000-memory.dmp

Filesize
104KB

Download
memory/1824-2-0x000007FEF64A0000-0x000007FEF6E8C000-memory.dmp

Filesize
9.9MB

Download
memory/1824-28-0x000007FEF64A3000-0x000007FEF64A4000-memory.dmp

Filesize
4KB

Download
memory/1824-34-0x000007FEF64A0000-0x000007FEF6E8C000-memory.dmp

Filesize
9.9MB

Download
memory/2948-7-0x0000000002C30000-0x0000000002CB0000-memory.dmp

Filesize
512KB

Download
memory/2948-8-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/2948-9-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/3032-15-0x000000001B520000-0x000000001B802000-memory.dmp

Filesize
2.9MB

Download
memory/3032-16-0x0000000002220000-0x0000000002228000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads