xworm | cb55474711d325028e8dc6dbc7162105009af685c3982c35e593fe6988d6af32

General

Target

XClient2.exe
Size

58KB
MD5

704c2e8b2d15dc2fb08fc335efd7193c
SHA1

8c5b3fa11ce45792e4fd4221af6393fdd094c9e2
SHA256

cb55474711d325028e8dc6dbc7162105009af685c3982c35e593fe6988d6af32
SHA512

4472315bb6022570c7131cf2142972435a5233f84842382e3566abb4c37653bb550561919f9bbf639bd1a7db17a059028d2b5d479a3ece106ed85b47f8190f1d
SSDEEP

1536:8uQZW2ATJmcoKMLe6FsdbaA1hQb8C6YxnO+mHm:8uQZmTJmsCj6baguO+X

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

sources-alerts.gl.at.ply.gg:1999

Attributes

Install_directory
%AppData%
install_file
FileExplorer.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/668-1-0x0000000000670000-0x0000000000684000-memory.dmp	family_xworm
behavioral2/files/0x000e000000023b90-58.dat	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
2356	powershell.exe
4788	powershell.exe
3200	powershell.exe
396	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-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	XClient2.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FileExplorer.lnk	XClient2.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FileExplorer.lnk	XClient2.exe

Executes dropped EXE 17 IoCs

pid	Process
3176	FileExplorer.exe
2472	FileExplorer.exe
2816	FileExplorer.exe
5016	FileExplorer.exe
1236	FileExplorer.exe
1916	FileExplorer.exe
1780	FileExplorer.exe
624	FileExplorer.exe
2920	FileExplorer.exe
1596	FileExplorer.exe
3088	FileExplorer.exe
3920	FileExplorer.exe
3040	FileExplorer.exe
3200	FileExplorer.exe
2276	FileExplorer.exe
216	FileExplorer.exe
3820	FileExplorer.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-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\FileExplorer = "C:\\Users\\Admin\\AppData\\Roaming\\FileExplorer.exe"	XClient2.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
2656	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4788	powershell.exe
4788	powershell.exe
3200	powershell.exe
3200	powershell.exe
396	powershell.exe
396	powershell.exe
2356	powershell.exe
2356	powershell.exe
668	XClient2.exe

Suspicious use of AdjustPrivilegeToken 22 IoCs

description	pid	Process
Token: SeDebugPrivilege	668	XClient2.exe
Token: SeDebugPrivilege	4788	powershell.exe
Token: SeDebugPrivilege	3200	powershell.exe
Token: SeDebugPrivilege	396	powershell.exe
Token: SeDebugPrivilege	2356	powershell.exe
Token: SeDebugPrivilege	3176	FileExplorer.exe
Token: SeDebugPrivilege	2472	FileExplorer.exe
Token: SeDebugPrivilege	2816	FileExplorer.exe
Token: SeDebugPrivilege	5016	FileExplorer.exe
Token: SeDebugPrivilege	1236	FileExplorer.exe
Token: SeDebugPrivilege	1916	FileExplorer.exe
Token: SeDebugPrivilege	1780	FileExplorer.exe
Token: SeDebugPrivilege	624	FileExplorer.exe
Token: SeDebugPrivilege	2920	FileExplorer.exe
Token: SeDebugPrivilege	1596	FileExplorer.exe
Token: SeDebugPrivilege	3088	FileExplorer.exe
Token: SeDebugPrivilege	3920	FileExplorer.exe
Token: SeDebugPrivilege	3040	FileExplorer.exe
Token: SeDebugPrivilege	3200	FileExplorer.exe
Token: SeDebugPrivilege	2276	FileExplorer.exe
Token: SeDebugPrivilege	216	FileExplorer.exe
Token: SeDebugPrivilege	3820	FileExplorer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
668	XClient2.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 668 wrote to memory of 4788	668	XClient2.exe	89
PID 668 wrote to memory of 4788	668	XClient2.exe	89
PID 668 wrote to memory of 3200	668	XClient2.exe	93
PID 668 wrote to memory of 3200	668	XClient2.exe	93
PID 668 wrote to memory of 396	668	XClient2.exe	95
PID 668 wrote to memory of 396	668	XClient2.exe	95
PID 668 wrote to memory of 2356	668	XClient2.exe	97
PID 668 wrote to memory of 2356	668	XClient2.exe	97
PID 668 wrote to memory of 2656	668	XClient2.exe	101
PID 668 wrote to memory of 2656	668	XClient2.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\XClient2.exe
"C:\Users\Admin\AppData\Local\Temp\XClient2.exe"
1⤵
- Checks computer location settings
- 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:668
- 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\XClient2.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4788
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient2.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3200
- 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\FileExplorer.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:396
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'FileExplorer.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2356
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "FileExplorer" /tr "C:\Users\Admin\AppData\Roaming\FileExplorer.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2656

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3176

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2472

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2816

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5016

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1236

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1916

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1780

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:624

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2920

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1596

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3088

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3920

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3040

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3200

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2276

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:216

C:\Users\Admin\AppData\Roaming\FileExplorer.exe
C:\Users\Admin\AppData\Roaming\FileExplorer.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3820

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\FileExplorer.exe.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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
944B

MD5
10890cda4b6eab618e926c4118ab0647

SHA1
1e1d63b73a0e6c7575f458b3c7917a9ce5ba776d

SHA256
00f8a035324d39bd62e6dee5e1b480069015471c487ebee4479e6990ea9ddb14

SHA512
a2ee84006c24a36f25e0bca0772430d64e3791f233da916aecdeae6712763e77d55bbbd00dc8f6b2b3887f3c26ab3980b96c5f46cc823e81e28abbbc5fc78221

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

Filesize
944B

MD5
da5c82b0e070047f7377042d08093ff4

SHA1
89d05987cd60828cca516c5c40c18935c35e8bd3

SHA256
77a94ef8c4258445d538a6006ffadb05afdf888f6f044e1e5466b981a07f16c5

SHA512
7360311a3c97b73dd3f6d7179cd979e0e20d69f380d38292447e17e369087d9dd5acb66cd0cbdd95ac4bfb16e5a1b86825f835a8d45b14ea9812102cff59704b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_exdmzvyq.irt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
58KB

MD5
704c2e8b2d15dc2fb08fc335efd7193c

SHA1
8c5b3fa11ce45792e4fd4221af6393fdd094c9e2

SHA256
cb55474711d325028e8dc6dbc7162105009af685c3982c35e593fe6988d6af32

SHA512
4472315bb6022570c7131cf2142972435a5233f84842382e3566abb4c37653bb550561919f9bbf639bd1a7db17a059028d2b5d479a3ece106ed85b47f8190f1d

Download Submit
memory/668-56-0x00007FF99D843000-0x00007FF99D845000-memory.dmp

Filesize
8KB

Download
memory/668-55-0x00007FF99D840000-0x00007FF99E301000-memory.dmp

Filesize
10.8MB

Download
memory/668-0-0x00007FF99D843000-0x00007FF99D845000-memory.dmp

Filesize
8KB

Download
memory/668-57-0x00007FF99D840000-0x00007FF99E301000-memory.dmp

Filesize
10.8MB

Download
memory/668-1-0x0000000000670000-0x0000000000684000-memory.dmp

Filesize
80KB

Download
memory/4788-16-0x00007FF99D840000-0x00007FF99E301000-memory.dmp

Filesize
10.8MB

Download
memory/4788-13-0x00007FF99D840000-0x00007FF99E301000-memory.dmp

Filesize
10.8MB

Download
memory/4788-12-0x00007FF99D840000-0x00007FF99E301000-memory.dmp

Filesize
10.8MB

Download
memory/4788-11-0x00000223F2D90000-0x00000223F2DB2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads