xworm | e53bd0b8797b8c0cc32875dba3469b938eb8d1c3812b2829378cdb7d40b62654

General

Target

XClient (1).exe
Size

41KB
MD5

8ac12cc24b5ac76188fe9612dc51777e
SHA1

0c0dddf34dbf7b95e82c58fdb7cfabb80db90430
SHA256

e53bd0b8797b8c0cc32875dba3469b938eb8d1c3812b2829378cdb7d40b62654
SHA512

02c4abdc825b0d3b9a88a1d66232d6f42497b7d83c6bfc473df8efbc0350371653d3ce220409aa5968cf71396ec230dea52e3793085d1f06d2338e4360c8bc93
SSDEEP

768:LrJDweBDuOkScrbsN/x6WECAr43MkfJF5Pa9p+U6iOwhF3/ibK:pDwewicrbsN/YDRr4RF49IU6iOwv6G

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

57.128.132.221:7000

Mutex

A0pVR4huor1J3yZ3

Attributes

Install_directory
%AppData%
install_file
Win32runtime.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral5/memory/2772-1-0x0000000000190000-0x00000000001A0000-memory.dmp	family_xworm
behavioral5/files/0x002000000002ab8a-57.dat	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
3000	powershell.exe
1620	powershell.exe
1052	powershell.exe
1392	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Win32runtime.lnk	XClient (1).exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Win32runtime.lnk	XClient (1).exe

Executes dropped EXE 2 IoCs

pid	Process
1844	Win32runtime.exe
2456	Win32runtime.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-1-5-21-1537126222-899333903-2037027349-1000\Software\Microsoft\Windows\CurrentVersion\Run\Win32runtime = "C:\\Users\\Admin\\AppData\\Roaming\\Win32runtime.exe"	XClient (1).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
1	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
4068	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3000	powershell.exe
3000	powershell.exe
1620	powershell.exe
1620	powershell.exe
1052	powershell.exe
1052	powershell.exe
1392	powershell.exe
1392	powershell.exe
2772	XClient (1).exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2772	XClient (1).exe
Token: SeDebugPrivilege	3000	powershell.exe
Token: SeDebugPrivilege	1620	powershell.exe
Token: SeDebugPrivilege	1052	powershell.exe
Token: SeDebugPrivilege	1392	powershell.exe
Token: SeDebugPrivilege	2772	XClient (1).exe
Token: SeDebugPrivilege	1844	Win32runtime.exe
Token: SeDebugPrivilege	2456	Win32runtime.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2772	XClient (1).exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2772 wrote to memory of 3000	2772	XClient (1).exe	78
PID 2772 wrote to memory of 3000	2772	XClient (1).exe	78
PID 2772 wrote to memory of 1620	2772	XClient (1).exe	80
PID 2772 wrote to memory of 1620	2772	XClient (1).exe	80
PID 2772 wrote to memory of 1052	2772	XClient (1).exe	82
PID 2772 wrote to memory of 1052	2772	XClient (1).exe	82
PID 2772 wrote to memory of 1392	2772	XClient (1).exe	84
PID 2772 wrote to memory of 1392	2772	XClient (1).exe	84
PID 2772 wrote to memory of 4068	2772	XClient (1).exe	86
PID 2772 wrote to memory of 4068	2772	XClient (1).exe	86

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 (1).exe
"C:\Users\Admin\AppData\Local\Temp\XClient (1).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:2772
- 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 (1).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3000
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient (1).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1620
- 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\Win32runtime.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1052
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Win32runtime.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1392
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Win32runtime" /tr "C:\Users\Admin\AppData\Roaming\Win32runtime.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4068

C:\Users\Admin\AppData\Roaming\Win32runtime.exe
C:\Users\Admin\AppData\Roaming\Win32runtime.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1844

C:\Users\Admin\AppData\Roaming\Win32runtime.exe
C:\Users\Admin\AppData\Roaming\Win32runtime.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2456

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Win32runtime.exe.log

Filesize
654B

MD5
2cbbb74b7da1f720b48ed31085cbd5b8

SHA1
79caa9a3ea8abe1b9c4326c3633da64a5f724964

SHA256
e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

SHA512
ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

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

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

Filesize
944B

MD5
4914eb0b2ff51bfa48484b5cc8454218

SHA1
6a7c3e36ce53b42497884d4c4a3bda438dd4374b

SHA256
7e510fc9344ef239ab1ab650dc95bb25fd44e2efba8b8246a3ac17880ee8b69e

SHA512
83ab35f622f4a5040ca5cb615a30f83bb0741449225f1fd1815b6923e225c28241d0c02d34f83f743349a5e57f84ca1c6f44016797a93d5985be41d11be79500

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

Filesize
944B

MD5
781da0576417bf414dc558e5a315e2be

SHA1
215451c1e370be595f1c389f587efeaa93108b4c

SHA256
41a5aef8b0bbeea2766f40a7bba2c78322379f167c610f7055ccb69e7db030fe

SHA512
24e283aa30a2903ebe154dad49b26067a45e46fec57549ad080d3b9ec3f272044efaaed3822d067837f5521262192f466c47195ffe7f75f8c7c5dcf3159ea737

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ubwvtwxm.tmf.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\Win32runtime.exe

Filesize
41KB

MD5
8ac12cc24b5ac76188fe9612dc51777e

SHA1
0c0dddf34dbf7b95e82c58fdb7cfabb80db90430

SHA256
e53bd0b8797b8c0cc32875dba3469b938eb8d1c3812b2829378cdb7d40b62654

SHA512
02c4abdc825b0d3b9a88a1d66232d6f42497b7d83c6bfc473df8efbc0350371653d3ce220409aa5968cf71396ec230dea52e3793085d1f06d2338e4360c8bc93

Download Submit
memory/2772-4-0x00007FFE79A50000-0x00007FFE7A512000-memory.dmp

Filesize
10.8MB

Download
memory/2772-0-0x00007FFE79A53000-0x00007FFE79A55000-memory.dmp

Filesize
8KB

Download
memory/2772-3-0x00007FFE79A53000-0x00007FFE79A55000-memory.dmp

Filesize
8KB

Download
memory/2772-2-0x00007FFE79A50000-0x00007FFE7A512000-memory.dmp

Filesize
10.8MB

Download
memory/2772-1-0x0000000000190000-0x00000000001A0000-memory.dmp

Filesize
64KB

Download
memory/3000-7-0x00007FFE79A50000-0x00007FFE7A512000-memory.dmp

Filesize
10.8MB

Download
memory/3000-16-0x00007FFE79A50000-0x00007FFE7A512000-memory.dmp

Filesize
10.8MB

Download
memory/3000-17-0x00007FFE79A50000-0x00007FFE7A512000-memory.dmp

Filesize
10.8MB

Download
memory/3000-18-0x00007FFE79A50000-0x00007FFE7A512000-memory.dmp

Filesize
10.8MB

Download
memory/3000-21-0x00007FFE79A50000-0x00007FFE7A512000-memory.dmp

Filesize
10.8MB

Download
memory/3000-5-0x00000146CECB0000-0x00000146CECD2000-memory.dmp

Filesize
136KB

Download
memory/3000-6-0x00007FFE79A50000-0x00007FFE7A512000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads