xworm | 2b105bc9141fb923b548a761f733a0bbd5ba732d317c83287a2daf091fac9f7e

General

Target

XClient.exe
Size

62KB
MD5

0ec8fc74616f174746cb50e46d08d73a
SHA1

082c2fee8f1f1404b5299083428cf7fd769076a5
SHA256

2b105bc9141fb923b548a761f733a0bbd5ba732d317c83287a2daf091fac9f7e
SHA512

d499b24adcca2401e966b03d3369506b7ff534117aff65cdb070ab6cc3dc11abc653fb511eae52c6dfa742eb75ea592695e2b62f3b26f53d839c945ba206e05d
SSDEEP

1536:rc7XNZ0lMLslvRXTFyPIBbP+Q+GGI6jyIO+tb:kQGslvR9bP+Q+GqyIO+tb

Score

10^/10

xworm evasion execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

r-insert.gl.at.ply.gg:43251

Attributes

Install_directory
%AppData%
install_file
svchost.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/4972-61-0x000000001B010000-0x000000001B01E000-memory.dmp	disable_win_def

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4972-1-0x0000000000200000-0x0000000000216000-memory.dmp	family_xworm

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	XClient.exe

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
3168	powershell.exe
2332	powershell.exe
3464	powershell.exe
3804	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-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	XClient.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	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-1-5-21-2412658365-3084825385-3340777666-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	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
16	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 8 IoCs

pid	Process
3804	powershell.exe
3804	powershell.exe
3168	powershell.exe
3168	powershell.exe
2332	powershell.exe
2332	powershell.exe
3464	powershell.exe
3464	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4972	XClient.exe
Token: SeDebugPrivilege	3804	powershell.exe
Token: SeDebugPrivilege	3168	powershell.exe
Token: SeDebugPrivilege	2332	powershell.exe
Token: SeDebugPrivilege	3464	powershell.exe
Token: SeDebugPrivilege	4972	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4972 wrote to memory of 3804	4972	XClient.exe	87
PID 4972 wrote to memory of 3804	4972	XClient.exe	87
PID 4972 wrote to memory of 3168	4972	XClient.exe	89
PID 4972 wrote to memory of 3168	4972	XClient.exe	89
PID 4972 wrote to memory of 2332	4972	XClient.exe	91
PID 4972 wrote to memory of 2332	4972	XClient.exe	91
PID 4972 wrote to memory of 3464	4972	XClient.exe	93
PID 4972 wrote to memory of 3464	4972	XClient.exe	93

System policy modification 1 TTPs 2 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	XClient.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\policies\system	XClient.exe

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- UAC bypass
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:4972
- 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:3804
- 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:3168
- 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\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2332
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3464

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Impair Defenses

1

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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\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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
944B

MD5
b51dc9e5ec3c97f72b4ca9488bbb4462

SHA1
5c1e8c0b728cd124edcacefb399bbd5e25b21bd3

SHA256
976f9534aa2976c85c2455bdde786a3f55d63aefdd40942eba1223c4c93590db

SHA512
0e5aa6cf64c535aefb833e5757b68e1094c87424abe2615a7d7d26b1b31eff358d12e36e75ca57fd690a9919b776600bf4c5c0e5a5df55366ba62238bdf3f280

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

Filesize
944B

MD5
eb1ad317bd25b55b2bbdce8a28a74a94

SHA1
98a3978be4d10d62e7411946474579ee5bdc5ea6

SHA256
9e94e7c9ac6134ee30e79498558aa1a5a1ac79a643666c3f8922eed215dd3a98

SHA512
d011f266c0240d84470c0f9577cd9e4927309bd19bb38570ca9704ed8e1d159f9bea982a59d3eefef72ce7a10bd81208b82e88ef57c7af587f7437a89769adc0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1etmziyf.t2u.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2332-44-0x0000021372C70000-0x0000021372E8C000-memory.dmp

Filesize
2.1MB

Download
memory/3168-32-0x000002B46A770000-0x000002B46A98C000-memory.dmp

Filesize
2.1MB

Download
memory/3804-4-0x00007FF82AA90000-0x00007FF82B551000-memory.dmp

Filesize
10.8MB

Download
memory/3804-18-0x0000016F604E0000-0x0000016F606FC000-memory.dmp

Filesize
2.1MB

Download
memory/3804-19-0x00007FF82AA90000-0x00007FF82B551000-memory.dmp

Filesize
10.8MB

Download
memory/3804-10-0x0000016F604B0000-0x0000016F604D2000-memory.dmp

Filesize
136KB

Download
memory/3804-11-0x00007FF82AA90000-0x00007FF82B551000-memory.dmp

Filesize
10.8MB

Download
memory/3804-3-0x00007FF82AA90000-0x00007FF82B551000-memory.dmp

Filesize
10.8MB

Download
memory/4972-0-0x00007FF82AA93000-0x00007FF82AA95000-memory.dmp

Filesize
8KB

Download
memory/4972-2-0x00007FF82AA90000-0x00007FF82B551000-memory.dmp

Filesize
10.8MB

Download
memory/4972-1-0x0000000000200000-0x0000000000216000-memory.dmp

Filesize
88KB

Download
memory/4972-60-0x00007FF82AA93000-0x00007FF82AA95000-memory.dmp

Filesize
8KB

Download
memory/4972-61-0x000000001B010000-0x000000001B01E000-memory.dmp

Filesize
56KB

Download
memory/4972-62-0x00007FF82AA90000-0x00007FF82B551000-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