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
behavioral8/memory/4412-1-0x00000000000B0000-0x00000000000CA000-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
3452	powershell.exe
860	powershell.exe
3732	powershell.exe
4544	powershell.exe

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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	Windows Shell Experience Host.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-1-5-21-493223053-2004649691-1575712786-1000\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
16	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 9 IoCs

pid	Process
3452	powershell.exe
3452	powershell.exe
860	powershell.exe
860	powershell.exe
3732	powershell.exe
3732	powershell.exe
4544	powershell.exe
4544	powershell.exe
4412	Windows Shell Experience Host.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	4412	Windows Shell Experience Host.exe
Token: SeDebugPrivilege	3452	powershell.exe
Token: SeDebugPrivilege	860	powershell.exe
Token: SeDebugPrivilege	3732	powershell.exe
Token: SeDebugPrivilege	4544	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4412	Windows Shell Experience Host.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4412 wrote to memory of 3452	4412	Windows Shell Experience Host.exe	92
PID 4412 wrote to memory of 3452	4412	Windows Shell Experience Host.exe	92
PID 4412 wrote to memory of 860	4412	Windows Shell Experience Host.exe	94
PID 4412 wrote to memory of 860	4412	Windows Shell Experience Host.exe	94
PID 4412 wrote to memory of 3732	4412	Windows Shell Experience Host.exe	96
PID 4412 wrote to memory of 3732	4412	Windows Shell Experience Host.exe	96
PID 4412 wrote to memory of 4544	4412	Windows Shell Experience Host.exe	100
PID 4412 wrote to memory of 4544	4412	Windows Shell Experience Host.exe	100

C:\Users\Admin\AppData\Local\Temp\Windows Shell Experience Host.exe
"C:\Users\Admin\AppData\Local\Temp\Windows Shell Experience Host.exe"
1⤵
- Checks computer location settings
- 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:4412
- 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:3452
- 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:860
- 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:3732
- 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:4544

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
2979eabc783eaca50de7be23dd4eafcf

SHA1
d709ce5f3a06b7958a67e20870bfd95b83cad2ea

SHA256
006cca90e78fbb571532a83082ac6712721a34ea4b21f490058ffb3f521f4903

SHA512
92bc433990572d9427d0c93eef9bd1cc23fa00ed60dd0c9c983d87d3421e02ce3f156c6f88fe916ef6782dbf185cbce083bc0094f8c527f302be6a37d1c53aba

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
65a68df1062af34622552c4f644a5708

SHA1
6f6ecf7b4b635abb0b132d95dac2759dc14b50af

SHA256
718dc2f5f4a6dbb7fab7f3db05bd7f602fb16526caae7084ab46c3ab4e7bad35

SHA512
4e460eb566032942547b58411222dd26ae300a95f83cf5ae6df58ebd28594341123611b348bd4031a33bc7f38307d5cb8fb677bba8c896919e3eee677a104d4d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
da5c82b0e070047f7377042d08093ff4

SHA1
89d05987cd60828cca516c5c40c18935c35e8bd3

SHA256
77a94ef8c4258445d538a6006ffadb05afdf888f6f044e1e5466b981a07f16c5

SHA512
7360311a3c97b73dd3f6d7179cd979e0e20d69f380d38292447e17e369087d9dd5acb66cd0cbdd95ac4bfb16e5a1b86825f835a8d45b14ea9812102cff59704b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_uyk5fs1j.kcu.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3452-9-0x000001D39B020000-0x000001D39B042000-memory.dmp

Filesize
136KB

Download
memory/3452-14-0x00007FF81EDB0000-0x00007FF81F871000-memory.dmp

Filesize
10.8MB

Download
memory/3452-15-0x00007FF81EDB0000-0x00007FF81F871000-memory.dmp

Filesize
10.8MB

Download
memory/3452-18-0x000001D3B35B0000-0x000001D3B37CC000-memory.dmp

Filesize
2.1MB

Download
memory/3452-19-0x00007FF81EDB0000-0x00007FF81F871000-memory.dmp

Filesize
10.8MB

Download
memory/3452-3-0x00007FF81EDB0000-0x00007FF81F871000-memory.dmp

Filesize
10.8MB

Download
memory/4412-0-0x00007FF81EDB3000-0x00007FF81EDB5000-memory.dmp

Filesize
8KB

Download
memory/4412-2-0x00007FF81EDB0000-0x00007FF81F871000-memory.dmp

Filesize
10.8MB

Download
memory/4412-1-0x00000000000B0000-0x00000000000CA000-memory.dmp

Filesize
104KB

Download
memory/4412-53-0x00007FF81EDB3000-0x00007FF81EDB5000-memory.dmp

Filesize
8KB

Download
memory/4412-59-0x00007FF81EDB0000-0x00007FF81F871000-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