xworm | 11ebc3db802d0d3f6291f4d7bc416176b934b4d3d331603a97032cadf87f8ce3

General

Target

XClient.exe
Size

59KB
MD5

36da0633a83eea45035eb69f0679c9be
SHA1

3ee638634881bdb3621e24e7c528ecb88c831887
SHA256

11ebc3db802d0d3f6291f4d7bc416176b934b4d3d331603a97032cadf87f8ce3
SHA512

62c148cf4da3a825bdf907753446d03ed6a769b52e0cc622f4ac4b95d895c6b7af0da7dd4d35e883cc7188b261fc84bc9ec0198b0faa5b545ba9ae9d89a9b3cf
SSDEEP

1536:KCLX6vMXXKD1Gq65PFkbP0sFzi86nzE9OLm7:KCj60k1GtFkbPJzS2OLm7

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

ii-rebate.gl.at.ply.gg:62928

Attributes

Install_directory
%Temp%

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/4512-1-0x0000000000E80000-0x0000000000E96000-memory.dmp	family_xworm
behavioral1/files/0x0005000000022ab2-54.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
1680	powershell.exe
4324	powershell.exe
1212	powershell.exe
4720	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-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	XClient.exe

Executes dropped EXE 9 IoCs

pid	Process
3076	$77-Installer
8	$77-Installer
2364	$77-Installer
3612	$77-Installer
4352	$77-Installer
1424	$77-Installer
2376	$77-Installer
3960	$77-Installer
4376	$77-Installer

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-1-5-21-523280732-2327480845-3730041215-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\$77-Installer = "C:\\Users\\Admin\\AppData\\Local\\Temp\\$77-Installer"	XClient.exe

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
3360	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1680	powershell.exe
1680	powershell.exe
4324	powershell.exe
4324	powershell.exe
1212	powershell.exe
1212	powershell.exe
4720	powershell.exe
4720	powershell.exe

Suspicious use of AdjustPrivilegeToken 15 IoCs

description	pid	Process
Token: SeDebugPrivilege	4512	XClient.exe
Token: SeDebugPrivilege	1680	powershell.exe
Token: SeDebugPrivilege	4324	powershell.exe
Token: SeDebugPrivilege	1212	powershell.exe
Token: SeDebugPrivilege	4720	powershell.exe
Token: SeDebugPrivilege	4512	XClient.exe
Token: SeDebugPrivilege	3076	$77-Installer
Token: SeDebugPrivilege	8	$77-Installer
Token: SeDebugPrivilege	2364	$77-Installer
Token: SeDebugPrivilege	3612	$77-Installer
Token: SeDebugPrivilege	4352	$77-Installer
Token: SeDebugPrivilege	1424	$77-Installer
Token: SeDebugPrivilege	2376	$77-Installer
Token: SeDebugPrivilege	3960	$77-Installer
Token: SeDebugPrivilege	4376	$77-Installer

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4512 wrote to memory of 1680	4512	XClient.exe	90
PID 4512 wrote to memory of 1680	4512	XClient.exe	90
PID 4512 wrote to memory of 4324	4512	XClient.exe	94
PID 4512 wrote to memory of 4324	4512	XClient.exe	94
PID 4512 wrote to memory of 1212	4512	XClient.exe	96
PID 4512 wrote to memory of 1212	4512	XClient.exe	96
PID 4512 wrote to memory of 4720	4512	XClient.exe	99
PID 4512 wrote to memory of 4720	4512	XClient.exe	99
PID 4512 wrote to memory of 3360	4512	XClient.exe	101
PID 4512 wrote to memory of 3360	4512	XClient.exe	101

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
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4512
- 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:1680
- 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:4324
- 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\$77-Installer'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1212
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '$77-Installer'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4720
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "$77-Installer" /tr "C:\Users\Admin\AppData\Local\Temp\$77-Installer"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3360

C:\Users\Admin\AppData\Local\Temp\$77-Installer
C:\Users\Admin\AppData\Local\Temp\$77-Installer
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3076

C:\Users\Admin\AppData\Local\Temp\$77-Installer
C:\Users\Admin\AppData\Local\Temp\$77-Installer
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:8

C:\Users\Admin\AppData\Local\Temp\$77-Installer
C:\Users\Admin\AppData\Local\Temp\$77-Installer
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2364

C:\Users\Admin\AppData\Local\Temp\$77-Installer
C:\Users\Admin\AppData\Local\Temp\$77-Installer
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3612

C:\Users\Admin\AppData\Local\Temp\$77-Installer
C:\Users\Admin\AppData\Local\Temp\$77-Installer
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4352

C:\Users\Admin\AppData\Local\Temp\$77-Installer
C:\Users\Admin\AppData\Local\Temp\$77-Installer
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1424

C:\Users\Admin\AppData\Local\Temp\$77-Installer
C:\Users\Admin\AppData\Local\Temp\$77-Installer
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2376

C:\Users\Admin\AppData\Local\Temp\$77-Installer
C:\Users\Admin\AppData\Local\Temp\$77-Installer
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3960

C:\Users\Admin\AppData\Local\Temp\$77-Installer
C:\Users\Admin\AppData\Local\Temp\$77-Installer
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4376

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:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\$77-Installer.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
c28c055af1ebc9225509ce03e563b021

SHA1
3b884ec6a457b1402aa9a5d9940c67f3145539c1

SHA256
987042dfadd4cf7481278d32ec94056a15ef4107a5b7b03cfb4f3d562b7d9009

SHA512
f4361a1d441ea900db8e6a71ede8b63db4abc63c0957ca586757e465e54c1a5794c14cf1ac44af2184276f8c006d2ee87fb32f53dc9d32dc421ba47b872c2632

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

Filesize
944B

MD5
34f595487e6bfd1d11c7de88ee50356a

SHA1
4caad088c15766cc0fa1f42009260e9a02f953bb

SHA256
0f9a4b52e01cb051052228a55d0515911b7ef5a8db3cf925528c746df511424d

SHA512
10976c5deaf9fac449e703e852c3b08d099f430de2d7c7b8e2525c35d63e28b890e5aab63feff9b20bca0aaf9f35a3ba411aee3fbeee9ea59f90ed25bd617a0b

Download Submit
C:\Users\Admin\AppData\Local\Temp\$77-Installer

Filesize
59KB

MD5
36da0633a83eea45035eb69f0679c9be

SHA1
3ee638634881bdb3621e24e7c528ecb88c831887

SHA256
11ebc3db802d0d3f6291f4d7bc416176b934b4d3d331603a97032cadf87f8ce3

SHA512
62c148cf4da3a825bdf907753446d03ed6a769b52e0cc622f4ac4b95d895c6b7af0da7dd4d35e883cc7188b261fc84bc9ec0198b0faa5b545ba9ae9d89a9b3cf

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2clojj4i.13p.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1680-16-0x00007FFB88240000-0x00007FFB88D01000-memory.dmp

Filesize
10.8MB

Download
memory/1680-12-0x00007FFB88240000-0x00007FFB88D01000-memory.dmp

Filesize
10.8MB

Download
memory/1680-13-0x00007FFB88240000-0x00007FFB88D01000-memory.dmp

Filesize
10.8MB

Download
memory/1680-2-0x000002C6BDF70000-0x000002C6BDF92000-memory.dmp

Filesize
136KB

Download
memory/4512-0-0x00007FFB88243000-0x00007FFB88245000-memory.dmp

Filesize
8KB

Download
memory/4512-52-0x00007FFB88240000-0x00007FFB88D01000-memory.dmp

Filesize
10.8MB

Download
memory/4512-53-0x00007FFB88240000-0x00007FFB88D01000-memory.dmp

Filesize
10.8MB

Download
memory/4512-1-0x0000000000E80000-0x0000000000E96000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads