xworm | 1b42c3fbf4f4a0bb2e53eb821e8bbcc4c4fbf257f9de481d9be2af96cee8918c

Analysis

max time kernel
611s
max time network
627s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
08/06/2024, 17:13

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General

Target
XClient.exe
Size 67KB
Sample240608-vrkgssdf7t
SHA256 1b42c3fbf4f4a0bb2e53eb821e8bbcc4c4fbf257f9de481d9be2af96cee8918c
MD5 3c8c4499a7cb6cbe5feb53e696fba86a
SHA1 27695d91e590f0f0d737f6e104a44d5772dbd7f9
SHA512 406f7bfb71627abd16c0591edeb7619261a0f2f43ab77233773771354c56e262522b4c213e22e9c8a6884170950bcec3329f1dc2e4bdc2ae3ed4cc02cefc9ec7
SSDEEP 1536:5kZOq4imIgifamb2OmPVn0bayLrv5st0uukY8o6OzMbvJgOHGJeSNt+/:5k54ti1kn0b/vv5sti8UzMbBgOmJeSNk
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm evasion execution rat trojan

Malware Config

Extracted

Family

xworm

medical-m.gl.at.ply.gg:28857

Attributes

install_file
USB.exe

Signatures

Contains code to disable Windows Defender 1 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral2/memory/3028-34-0x0000000001190000-0x000000000119E000-memory.dmp	disable_win_def

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3028-1-0x0000000000AB0000-0x0000000000AC8000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2344	powershell.exe
4628	powershell.exe

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
5076	netsh.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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	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
17	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2344	powershell.exe
2344	powershell.exe
4628	powershell.exe
4628	powershell.exe
3028	XClient.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3028	XClient.exe
Token: SeDebugPrivilege	2344	powershell.exe
Token: SeDebugPrivilege	4628	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3028	XClient.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3028 wrote to memory of 2344	3028	XClient.exe	90
PID 3028 wrote to memory of 2344	3028	XClient.exe	90
PID 3028 wrote to memory of 4628	3028	XClient.exe	92
PID 3028 wrote to memory of 4628	3028	XClient.exe	92
PID 3028 wrote to memory of 5076	3028	XClient.exe	98
PID 3028 wrote to memory of 5076	3028	XClient.exe	98

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3028
- 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:2344
- 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:4628
- C:\Windows\System32\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall set allprofiles state off
  2⤵
  - Modifies Windows Firewall
  PID:5076

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
MD5 77d622bb1a5b250869a3238b9bc1402b
SHA1 d47f4003c2554b9dfc4c16f22460b331886b191b
SHA512 d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9
MD5 SHA1 SHA512

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__PSScriptPolicyTest_jp5hqzxg.qxx.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jp5hqzxg.qxx.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/2344-14-0x00007FFD900B0000-0x00007FFD90B71000-memory.dmp

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memory/2344-5-0x000002DA9CF50000-0x000002DA9CF72000-memory.dmp

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memory/2344-9-0x00007FFD900B0000-0x00007FFD90B71000-memory.dmp

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memory/2344-15-0x00007FFD900B0000-0x00007FFD90B71000-memory.dmp

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memory/2344-18-0x00007FFD900B0000-0x00007FFD90B71000-memory.dmp

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memory/2344-19-0x00007FFD900B0000-0x00007FFD90B71000-memory.dmp

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memory/3028-0-0x00007FFD900B3000-0x00007FFD900B5000-memory.dmp

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memory/3028-2-0x00007FFD900B0000-0x00007FFD90B71000-memory.dmp

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memory/3028-1-0x0000000000AB0000-0x0000000000AC8000-memory.dmp

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memory/3028-32-0x00007FFD900B3000-0x00007FFD900B5000-memory.dmp

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memory/3028-33-0x00007FFD900B0000-0x00007FFD90B71000-memory.dmp

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memory/3028-34-0x0000000001190000-0x000000000119E000-memory.dmp

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