xworm | 9dc9b2e78ea2fb6b99b8366123315d73f6097abc59514a5456da61b4dbbe9ecc

General

Target

svchost.exe
Size

74KB
MD5

31fc055df1031a064f93fb32fedb1102
SHA1

bd7c77edba60504dd17085eb99f9486185a59925
SHA256

9dc9b2e78ea2fb6b99b8366123315d73f6097abc59514a5456da61b4dbbe9ecc
SHA512

baf46d849c32c2399d169e508a2fb5fd0e38c22ce0b3d85a1f62520dfd4335cbae5b42002d9a0b5f1b7e496a3cc7c02474eccd1a4475cafb3f55706cbe330daa
SSDEEP

1536:8LgUO5QAWo3oV0sZW3aE3i3kb4a7Saxu6hxOAKSc8f4Q:8LgfGcoVo33bbNnxLOLSc8gQ

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:55299

road-stars.gl.at.ply.gg:55299

Attributes

Install_directory
%Userprofile%
install_file
svchost.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2760-1-0x0000000000B10000-0x0000000000B28000-memory.dmp	family_xworm
behavioral1/files/0x000c00000001202c-37.dat	family_xworm
behavioral1/memory/2200-39-0x00000000002B0000-0x00000000002C8000-memory.dmp	family_xworm
behavioral1/memory/1876-41-0x0000000000AB0000-0x0000000000AC8000-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
660	powershell.exe
1624	powershell.exe
2748	powershell.exe
2488	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
2200	svchost.exe
1876	svchost.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-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\svchost.exe"	svchost.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
2868	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2748	powershell.exe
2488	powershell.exe
660	powershell.exe
1624	powershell.exe
2760	svchost.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2760	svchost.exe
Token: SeDebugPrivilege	2748	powershell.exe
Token: SeDebugPrivilege	2488	powershell.exe
Token: SeDebugPrivilege	660	powershell.exe
Token: SeDebugPrivilege	1624	powershell.exe
Token: SeDebugPrivilege	2760	svchost.exe
Token: SeDebugPrivilege	2200	svchost.exe
Token: SeDebugPrivilege	1876	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2760	svchost.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2760 wrote to memory of 2748	2760	svchost.exe	31
PID 2760 wrote to memory of 2748	2760	svchost.exe	31
PID 2760 wrote to memory of 2748	2760	svchost.exe	31
PID 2760 wrote to memory of 2488	2760	svchost.exe	33
PID 2760 wrote to memory of 2488	2760	svchost.exe	33
PID 2760 wrote to memory of 2488	2760	svchost.exe	33
PID 2760 wrote to memory of 660	2760	svchost.exe	35
PID 2760 wrote to memory of 660	2760	svchost.exe	35
PID 2760 wrote to memory of 660	2760	svchost.exe	35
PID 2760 wrote to memory of 1624	2760	svchost.exe	37
PID 2760 wrote to memory of 1624	2760	svchost.exe	37
PID 2760 wrote to memory of 1624	2760	svchost.exe	37
PID 2760 wrote to memory of 2868	2760	svchost.exe	39
PID 2760 wrote to memory of 2868	2760	svchost.exe	39
PID 2760 wrote to memory of 2868	2760	svchost.exe	39
PID 2092 wrote to memory of 2200	2092	taskeng.exe	43
PID 2092 wrote to memory of 2200	2092	taskeng.exe	43
PID 2092 wrote to memory of 2200	2092	taskeng.exe	43
PID 2092 wrote to memory of 1876	2092	taskeng.exe	44
PID 2092 wrote to memory of 1876	2092	taskeng.exe	44
PID 2092 wrote to memory of 1876	2092	taskeng.exe	44

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\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\svchost.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:2760
- 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\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2748
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2488
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:660
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1624
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\svchost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2868

C:\Windows\system32\taskeng.exe
taskeng.exe {21960E7B-4863-4D6B-B7BB-7F8C585DBEBC} S-1-5-21-2039016743-699959520-214465309-1000:PIDEURYY\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2092
- C:\Users\Admin\svchost.exe
  C:\Users\Admin\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2200
- C:\Users\Admin\svchost.exe
  C:\Users\Admin\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1876

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\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
7df2ebfa0f595a613a41cb5e8484c6a3

SHA1
348bfc8af3d1788f2cf41a10a592adfdf4cbdb38

SHA256
5cc921a28bdf2cd896a5cf020ba4fcf3d32443936085e05614af15f787ff259d

SHA512
2cf6dd1d90e051d609139951885ca0c672d016b8fe5618785ae390c54f6a1fb48afb373e26a5e887f3ecf3a587939108a96537ef79830fa0d67bd59c22869470

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

Filesize
74KB

MD5
31fc055df1031a064f93fb32fedb1102

SHA1
bd7c77edba60504dd17085eb99f9486185a59925

SHA256
9dc9b2e78ea2fb6b99b8366123315d73f6097abc59514a5456da61b4dbbe9ecc

SHA512
baf46d849c32c2399d169e508a2fb5fd0e38c22ce0b3d85a1f62520dfd4335cbae5b42002d9a0b5f1b7e496a3cc7c02474eccd1a4475cafb3f55706cbe330daa

Download Submit
memory/1876-41-0x0000000000AB0000-0x0000000000AC8000-memory.dmp

Filesize
96KB

Download
memory/2200-39-0x00000000002B0000-0x00000000002C8000-memory.dmp

Filesize
96KB

Download
memory/2488-16-0x0000000002810000-0x0000000002818000-memory.dmp

Filesize
32KB

Download
memory/2488-15-0x000000001B630000-0x000000001B912000-memory.dmp

Filesize
2.9MB

Download
memory/2748-7-0x0000000002D30000-0x0000000002DB0000-memory.dmp

Filesize
512KB

Download
memory/2748-8-0x000000001B6C0000-0x000000001B9A2000-memory.dmp

Filesize
2.9MB

Download
memory/2748-9-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/2760-2-0x000007FEF6780000-0x000007FEF716C000-memory.dmp

Filesize
9.9MB

Download
memory/2760-0-0x000007FEF6783000-0x000007FEF6784000-memory.dmp

Filesize
4KB

Download
memory/2760-28-0x000007FEF6783000-0x000007FEF6784000-memory.dmp

Filesize
4KB

Download
memory/2760-34-0x000007FEF6780000-0x000007FEF716C000-memory.dmp

Filesize
9.9MB

Download
memory/2760-1-0x0000000000B10000-0x0000000000B28000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads