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 1 IoCs

resource	yara_rule
behavioral5/memory/4220-1-0x0000000000540000-0x0000000000550000-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
4992	powershell.exe
244	powershell.exe
4020	powershell.exe
2260	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Win32runtime.lnk	XClient (1).exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Win32runtime.lnk	XClient (1).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-1-5-21-2253712635-4068079004-3870069674-1000\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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
884	timeout.exe

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
4576	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2260	powershell.exe
2260	powershell.exe
4992	powershell.exe
4992	powershell.exe
244	powershell.exe
244	powershell.exe
4020	powershell.exe
4020	powershell.exe
4220	XClient (1).exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4220	XClient (1).exe
Token: SeDebugPrivilege	2260	powershell.exe
Token: SeDebugPrivilege	4992	powershell.exe
Token: SeDebugPrivilege	244	powershell.exe
Token: SeDebugPrivilege	4020	powershell.exe
Token: SeDebugPrivilege	4220	XClient (1).exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4220	XClient (1).exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4220 wrote to memory of 2260	4220	XClient (1).exe	79
PID 4220 wrote to memory of 2260	4220	XClient (1).exe	79
PID 4220 wrote to memory of 4992	4220	XClient (1).exe	81
PID 4220 wrote to memory of 4992	4220	XClient (1).exe	81
PID 4220 wrote to memory of 244	4220	XClient (1).exe	83
PID 4220 wrote to memory of 244	4220	XClient (1).exe	83
PID 4220 wrote to memory of 4020	4220	XClient (1).exe	85
PID 4220 wrote to memory of 4020	4220	XClient (1).exe	85
PID 4220 wrote to memory of 4576	4220	XClient (1).exe	87
PID 4220 wrote to memory of 4576	4220	XClient (1).exe	87
PID 4220 wrote to memory of 2432	4220	XClient (1).exe	89
PID 4220 wrote to memory of 2432	4220	XClient (1).exe	89
PID 4220 wrote to memory of 2464	4220	XClient (1).exe	91
PID 4220 wrote to memory of 2464	4220	XClient (1).exe	91
PID 2464 wrote to memory of 884	2464	cmd.exe	93
PID 2464 wrote to memory of 884	2464	cmd.exe	93

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:4220
- 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:2260
- 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:4992
- 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:244
- 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:4020
- 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:4576
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /delete /f /tn "Win32runtime"
  2⤵
  PID:2432
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp22E5.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2464
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:884

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\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
051a74485331f9d9f5014e58ec71566c

SHA1
4ed0256a84f2e95609a0b4d5c249bca624db8fe4

SHA256
3f67e4ba795fd89d33e9a1fe7547e297a82ae50b8f25eedc2b33a27866b28888

SHA512
1f15fd8ca727b198495ef826002c1cbcc63e98eecb2e92abff48354ae668e6c3aaf9bd3005664967ae75637bacee7e730ce36142483d08ae6a068d9ae3e0e17d

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_ej5sawzm.ubg.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp22E5.tmp.bat

Filesize
163B

MD5
d5b8fbb95877673298f9781b030cc3ac

SHA1
0f867c41cee738cebb0aacd66617866bc829e90c

SHA256
4bc0fd8eb65da3fcdbab06716937337ac1afec07c830656b58fe015be885975a

SHA512
afa40e50d354e5b3728f58b2df7ff91e62e4f9121fab46f49ea1d17741a1cb37df9aa5297de5a1ef97d1cdb183e24a4ad92fce0e4aa37b19425f80da02cfad6d

Download Submit
memory/2260-9-0x00007FFD8E080000-0x00007FFD8EB42000-memory.dmp

Filesize
10.8MB

Download
memory/2260-14-0x00007FFD8E080000-0x00007FFD8EB42000-memory.dmp

Filesize
10.8MB

Download
memory/2260-15-0x00007FFD8E080000-0x00007FFD8EB42000-memory.dmp

Filesize
10.8MB

Download
memory/2260-16-0x00007FFD8E080000-0x00007FFD8EB42000-memory.dmp

Filesize
10.8MB

Download
memory/2260-19-0x00007FFD8E080000-0x00007FFD8EB42000-memory.dmp

Filesize
10.8MB

Download
memory/2260-13-0x000002587C0E0000-0x000002587C102000-memory.dmp

Filesize
136KB

Download
memory/2260-3-0x00007FFD8E080000-0x00007FFD8EB42000-memory.dmp

Filesize
10.8MB

Download
memory/4220-0-0x00007FFD8E083000-0x00007FFD8E085000-memory.dmp

Filesize
8KB

Download
memory/4220-2-0x00007FFD8E080000-0x00007FFD8EB42000-memory.dmp

Filesize
10.8MB

Download
memory/4220-51-0x00007FFD8E083000-0x00007FFD8E085000-memory.dmp

Filesize
8KB

Download
memory/4220-56-0x00007FFD8E080000-0x00007FFD8EB42000-memory.dmp

Filesize
10.8MB

Download
memory/4220-64-0x00007FFD8E080000-0x00007FFD8EB42000-memory.dmp

Filesize
10.8MB

Download
memory/4220-1-0x0000000000540000-0x0000000000550000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads