xworm | fcd2edc86826bb43a8c5b0e98ea719fa311a85234c620cbb69a35112a5699e55

General

Target

XClient.exe
Size

74KB
MD5

c993fe2aacb27cf417f04ec1a2a7a0b9
SHA1

05b88b752cb79c86475691b4627faf8f1610d842
SHA256

fcd2edc86826bb43a8c5b0e98ea719fa311a85234c620cbb69a35112a5699e55
SHA512

8542a911dcb3839ff28a22d9285ca1494c1dedc5b2dcba07954939149d39e4f47a6a2b76b1a8db756309cc3b261fde03f903f55987868882c46cfe60b1513fb0
SSDEEP

1536:64S6Usxc2MdQHrL/L91JtmUbZGzaOa+Z4E6ORmp3jRO5+48cVo:6VMxc2nLL/R1J8UbZfOaXgRG3jROEl

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

tr3.localto.net:44953

Attributes

Install_directory
%ProgramData%
install_file
svchhost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4600-1-0x0000000000630000-0x0000000000648000-memory.dmp	family_xworm
behavioral2/files/0x000b000000023248-57.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
3260	powershell.exe
2320	powershell.exe
4672	powershell.exe
2660	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-1-5-21-3642458265-1901903390-453309326-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 10 IoCs

pid	Process
1348	svchhost.exe
4632	svchhost.exe
4828	svchhost.exe
1508	svchhost.exe
4860	svchhost.exe
960	svchhost.exe
3672	svchhost.exe
2696	svchhost.exe
2212	svchhost.exe
1508	svchhost.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-1-5-21-3642458265-1901903390-453309326-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchhost = "C:\\ProgramData\\svchhost.exe"	XClient.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
6	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
1904	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4600	XClient.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4672	powershell.exe
4672	powershell.exe
2660	powershell.exe
2660	powershell.exe
3260	powershell.exe
3260	powershell.exe
2320	powershell.exe
2320	powershell.exe

Suspicious use of AdjustPrivilegeToken 16 IoCs

description	pid	Process
Token: SeDebugPrivilege	4600	XClient.exe
Token: SeDebugPrivilege	4672	powershell.exe
Token: SeDebugPrivilege	2660	powershell.exe
Token: SeDebugPrivilege	3260	powershell.exe
Token: SeDebugPrivilege	2320	powershell.exe
Token: SeDebugPrivilege	4600	XClient.exe
Token: SeDebugPrivilege	1348	svchhost.exe
Token: SeDebugPrivilege	4632	svchhost.exe
Token: SeDebugPrivilege	4828	svchhost.exe
Token: SeDebugPrivilege	1508	svchhost.exe
Token: SeDebugPrivilege	4860	svchhost.exe
Token: SeDebugPrivilege	960	svchhost.exe
Token: SeDebugPrivilege	3672	svchhost.exe
Token: SeDebugPrivilege	2696	svchhost.exe
Token: SeDebugPrivilege	2212	svchhost.exe
Token: SeDebugPrivilege	1508	svchhost.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4600 wrote to memory of 4672	4600	XClient.exe	84
PID 4600 wrote to memory of 4672	4600	XClient.exe	84
PID 4600 wrote to memory of 2660	4600	XClient.exe	86
PID 4600 wrote to memory of 2660	4600	XClient.exe	86
PID 4600 wrote to memory of 3260	4600	XClient.exe	88
PID 4600 wrote to memory of 3260	4600	XClient.exe	88
PID 4600 wrote to memory of 2320	4600	XClient.exe	90
PID 4600 wrote to memory of 2320	4600	XClient.exe	90
PID 4600 wrote to memory of 1904	4600	XClient.exe	92
PID 4600 wrote to memory of 1904	4600	XClient.exe	92

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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4600
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4672
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2660
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3260
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2320
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchhost" /tr "C:\ProgramData\svchhost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1904

C:\ProgramData\svchhost.exe
C:\ProgramData\svchhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1348

C:\ProgramData\svchhost.exe
C:\ProgramData\svchhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4632

C:\ProgramData\svchhost.exe
C:\ProgramData\svchhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4828

C:\ProgramData\svchhost.exe
C:\ProgramData\svchhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1508

C:\ProgramData\svchhost.exe
C:\ProgramData\svchhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4860

C:\ProgramData\svchhost.exe
C:\ProgramData\svchhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:960

C:\ProgramData\svchhost.exe
C:\ProgramData\svchhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3672

C:\ProgramData\svchhost.exe
C:\ProgramData\svchhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2696

C:\ProgramData\svchhost.exe
C:\ProgramData\svchhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2212

C:\ProgramData\svchhost.exe
C:\ProgramData\svchhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1508

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\svchhost.exe

Filesize
74KB

MD5
c993fe2aacb27cf417f04ec1a2a7a0b9

SHA1
05b88b752cb79c86475691b4627faf8f1610d842

SHA256
fcd2edc86826bb43a8c5b0e98ea719fa311a85234c620cbb69a35112a5699e55

SHA512
8542a911dcb3839ff28a22d9285ca1494c1dedc5b2dcba07954939149d39e4f47a6a2b76b1a8db756309cc3b261fde03f903f55987868882c46cfe60b1513fb0

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\svchhost.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
944B

MD5
3a6bad9528f8e23fb5c77fbd81fa28e8

SHA1
f127317c3bc6407f536c0f0600dcbcf1aabfba36

SHA256
986366767de5873f1b170a63f2a33ce05132d1afd90c8f5017afbca8ef1beb05

SHA512
846002154a0ece6f3e9feda6f115d3161dc21b3789525dd62ae1d9188495171293efdbe7be4710666dd8a15e66b557315b5a02918a741ed1d5f3ff0c515b98e2

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

Filesize
944B

MD5
e3b6cc0fbea08a0831f0026a696db8b8

SHA1
4e32202d4700061cfd80d55e42798131c9f530d4

SHA256
3284cae7b82be99d93064390ba071ba4321f3f24dd21515b37b2ca9f31b2e8d5

SHA512
6a06856f360b48c8bc8a15ffb8d7a6604ec357bcb1d0fad5d71a2cb876929a7b67eb40ba4493998ab1bbae8cb71212e124276f27d5c138a135041c27a41a0b7a

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

Filesize
944B

MD5
e5663972c1caaba7088048911c758bf3

SHA1
3462dea0f9c2c16a9c3afdaef8bbb1f753c1c198

SHA256
9f7f29a4696876cadca3f14d7e43f9ede0c97fd64be3f5d94bda49a91b6a419e

SHA512
ff4e72c46cf083de62baa2ce2661555dd91b5f144294015f7b262fd4500cb67fe80e1871a82da63b607e3e9cef401f4b73c587bf1134637881ecad51aad1eddc

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_iivszaar.byx.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4600-1-0x0000000000630000-0x0000000000648000-memory.dmp

Filesize
96KB

Download
memory/4600-2-0x00007FF9E1360000-0x00007FF9E1E21000-memory.dmp

Filesize
10.8MB

Download
memory/4600-0-0x00007FF9E1363000-0x00007FF9E1365000-memory.dmp

Filesize
8KB

Download
memory/4600-56-0x00007FF9E1360000-0x00007FF9E1E21000-memory.dmp

Filesize
10.8MB

Download
memory/4600-55-0x00007FF9E1363000-0x00007FF9E1365000-memory.dmp

Filesize
8KB

Download
memory/4672-13-0x0000020BC2520000-0x0000020BC2542000-memory.dmp

Filesize
136KB

Download
memory/4672-17-0x00007FF9E1360000-0x00007FF9E1E21000-memory.dmp

Filesize
10.8MB

Download
memory/4672-15-0x00007FF9E1360000-0x00007FF9E1E21000-memory.dmp

Filesize
10.8MB

Download
memory/4672-14-0x00007FF9E1360000-0x00007FF9E1E21000-memory.dmp

Filesize
10.8MB

Download
memory/4672-3-0x00007FF9E1360000-0x00007FF9E1E21000-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