xworm | 03075f33cfb3ba600a7312a2c6ed5a26dd2e2d210913f70a471f1a120e501891

General

Target

XClient.exe
Size

77KB
MD5

1fdd77cb12693ba80efbe8a5463b34b0
SHA1

a28daa287556525ef8d54f4244fac761b9be9dc3
SHA256

03075f33cfb3ba600a7312a2c6ed5a26dd2e2d210913f70a471f1a120e501891
SHA512

e635f719d5e4a3a394ef348e5324c4e407427f00354e0ba9bc7cd25a3e966ecbd045211141a2c3156d1caf4459fd813b772595e74df06426bc9fd884e7e0f7d1
SSDEEP

1536:G8XGqHq8FQcOUQKHMC6YhEE+b/dYMYHbaPT+OpsE6dKWOKeexI3Y:G822qMWKsvE+b/SMkbCZmKWOXlY

Score

10^/10

xworm bootkit defense_evasion discovery execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

cause-indexes.gl.at.ply.gg:17210

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/1428-1-0x0000000000CD0000-0x0000000000CEA000-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
2136	powershell.exe
1472	powershell.exe
4148	powershell.exe
3392	powershell.exe

Disables Task Manager via registry modification
defense_evasion

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
8	ohodhi.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-1-5-21-2800786028-4028220528-1905518260-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	ohodhi.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ohodhi.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
4368	reg.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2136	powershell.exe
2136	powershell.exe
1472	powershell.exe
1472	powershell.exe
4148	powershell.exe
4148	powershell.exe
3392	powershell.exe
3392	powershell.exe
1428	XClient.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1428	XClient.exe
Token: SeDebugPrivilege	2136	powershell.exe
Token: SeDebugPrivilege	1472	powershell.exe
Token: SeDebugPrivilege	4148	powershell.exe
Token: SeDebugPrivilege	3392	powershell.exe
Token: SeDebugPrivilege	1428	XClient.exe
Token: 33	2964	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	2964	AUDIODG.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1428	XClient.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1428 wrote to memory of 2136	1428	XClient.exe	82
PID 1428 wrote to memory of 2136	1428	XClient.exe	82
PID 1428 wrote to memory of 1472	1428	XClient.exe	84
PID 1428 wrote to memory of 1472	1428	XClient.exe	84
PID 1428 wrote to memory of 4148	1428	XClient.exe	86
PID 1428 wrote to memory of 4148	1428	XClient.exe	86
PID 1428 wrote to memory of 3392	1428	XClient.exe	88
PID 1428 wrote to memory of 3392	1428	XClient.exe	88
PID 1428 wrote to memory of 8	1428	XClient.exe	91
PID 1428 wrote to memory of 8	1428	XClient.exe	91
PID 1428 wrote to memory of 8	1428	XClient.exe	91
PID 8 wrote to memory of 4304	8	ohodhi.exe	92
PID 8 wrote to memory of 4304	8	ohodhi.exe	92
PID 8 wrote to memory of 4304	8	ohodhi.exe	92
PID 4304 wrote to memory of 4368	4304	cmd.exe	94
PID 4304 wrote to memory of 4368	4304	cmd.exe	94
PID 4304 wrote to memory of 4368	4304	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.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:1428
- 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:2136
- 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:1472
- 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'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4148
- 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:3392
- C:\Users\Admin\AppData\Local\Temp\ohodhi.exe
  "C:\Users\Admin\AppData\Local\Temp\ohodhi.exe"
  2⤵
  - Executes dropped EXE
  - Writes to the Master Boot Record (MBR)
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:8
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c REG ADD hkcu\Software\Microsoft\Windows\CurrentVersion\policies\system /v DisableTaskMgr /t reg_dword /d 1 /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4304
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD hkcu\Software\Microsoft\Windows\CurrentVersion\policies\system /v DisableTaskMgr /t reg_dword /d 1 /f
      4⤵
      System Location Discovery: System Language Discovery
      Modifies registry key
      PID:4368

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x00000000000004DC 0x00000000000004C0
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2964

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

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

2

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

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
7d760ca2472bcb9fe9310090d91318ce

SHA1
cb316b8560b38ea16a17626e685d5a501cd31c4a

SHA256
5c362b53c4a4578d8b57c51e1eac15f7f3b2447e43e0dad5102ecd003d5b41d4

SHA512
141e8661d7348ebbc1f74f828df956a0c6e4cdb70f3b9d52623c9a30993bfd91da9ed7d8d284b84f173d3e6f47c876fb4a8295110895f44d97fd6cc4c5659c35

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

Filesize
944B

MD5
81dc356768c666a613df994ba756b09f

SHA1
0f6768127d68715e688518e7a7d9159114e71d11

SHA256
f12f8ba2539036e660cf18f58da225e0d3571906b89797bc5308b745423e79bb

SHA512
83f7344aba829fb83dcff48d2c9be8e4ccd6d1d3659d1b77e6867852002166f5fd1e45649dc97bec5283370ed46963ea5aa7d43db446fb2d6544dde2a1b1c605

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

Filesize
944B

MD5
a77a224739207f33f335113eaed5267b

SHA1
4e99ac40069abef2c4a41761762c9ff2518fe733

SHA256
8567db24e2be485cde92b736d059a72db8e900f696039846802b9c0151d60559

SHA512
66ee305219fbe8e30b2f6680db3552f156aa2a16c137a35f960c33d0de730c9f5f71781367c4fd8bb0f9035d180a26b5ad22d53bc35537c2b4b6b71d13b963a9

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lbhwfeyd.hct.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\ohodhi.exe

Filesize
63KB

MD5
2cf51977ed60a9a59d29a72075ce52ad

SHA1
960e40eaa8445c0049d11f97abba7f4b465ad4d5

SHA256
64735679e70b0d6e67198c28df11cf449dc114df01f6c336d61a9da39448f853

SHA512
bfcad9e99ff0dfd2cd917b8160cccab3710ed9974a6c15ea7dd1b0db965a51eec5ac588a87c4bab37af60504a3deb4f11de0a4d93a0c3648673b0dc0824646ad

Download Submit
memory/8-70-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/1428-55-0x00007FFA7ECB0000-0x00007FFA7F772000-memory.dmp

Filesize
10.8MB

Download
memory/1428-53-0x00007FFA7ECB0000-0x00007FFA7F772000-memory.dmp

Filesize
10.8MB

Download
memory/1428-54-0x00007FFA7ECB3000-0x00007FFA7ECB5000-memory.dmp

Filesize
8KB

Download
memory/1428-0-0x00007FFA7ECB3000-0x00007FFA7ECB5000-memory.dmp

Filesize
8KB

Download
memory/1428-57-0x0000000001510000-0x000000000151C000-memory.dmp

Filesize
48KB

Download
memory/1428-69-0x0000000001520000-0x00000000015AE000-memory.dmp

Filesize
568KB

Download
memory/1428-1-0x0000000000CD0000-0x0000000000CEA000-memory.dmp

Filesize
104KB

Download
memory/2136-17-0x00007FFA7ECB0000-0x00007FFA7F772000-memory.dmp

Filesize
10.8MB

Download
memory/2136-14-0x00007FFA7ECB0000-0x00007FFA7F772000-memory.dmp

Filesize
10.8MB

Download
memory/2136-13-0x00007FFA7ECB0000-0x00007FFA7F772000-memory.dmp

Filesize
10.8MB

Download
memory/2136-12-0x00007FFA7ECB0000-0x00007FFA7F772000-memory.dmp

Filesize
10.8MB

Download
memory/2136-11-0x00007FFA7ECB0000-0x00007FFA7F772000-memory.dmp

Filesize
10.8MB

Download
memory/2136-10-0x0000023F39920000-0x0000023F39942000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads