xworm | 4094fea68e7a41431fe15eaf1ebbf4d88d20c10e01d4c32e4b466757e626964f

General

Target

XClient111.exe
Size

75KB
MD5

1c7d67e357a4c6f86fde169b8fa74639
SHA1

4168ae0daa5e17cd0928c7542e49bde8490acdb9
SHA256

4094fea68e7a41431fe15eaf1ebbf4d88d20c10e01d4c32e4b466757e626964f
SHA512

a9b87f16bd144568182d2f2dc19855d57be54b73f3066cbfc299f6132b41cd2cd49fdd4d2921d2dedf17b05f5a244c9b41dc8ff500140cbe760e11daf9038205
SSDEEP

1536:9zpyggc1VrFL5n1yubpKAXcbK8ni9o26XvmOpqKnKE1J:9lEaFVn1zbzsbKh9oPvmOIiJ

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

5.166.171.54:5552

Attributes

Install_directory
%Temp%
install_file
CelestialUpdate.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/384-1-0x0000000000990000-0x00000000009AA000-memory.dmp	family_xworm
behavioral2/files/0x000e000000023b92-61.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
1748	powershell.exe
1776	powershell.exe
5036	powershell.exe
2728	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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	XClient111.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\CelestialUpdate.lnk	XClient111.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\CelestialUpdate.lnk	XClient111.exe

Executes dropped EXE 3 IoCs

pid	Process
3592	CelestialUpdate.exe
2936	CelestialUpdate.exe
4816	CelestialUpdate.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-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CelestialUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\CelestialUpdate.exe"	XClient111.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
14	ip-api.com

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
2904	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1748	powershell.exe
1748	powershell.exe
1776	powershell.exe
1776	powershell.exe
5036	powershell.exe
5036	powershell.exe
2728	powershell.exe
2728	powershell.exe
384	XClient111.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	384	XClient111.exe
Token: SeDebugPrivilege	1748	powershell.exe
Token: SeDebugPrivilege	1776	powershell.exe
Token: SeDebugPrivilege	5036	powershell.exe
Token: SeDebugPrivilege	2728	powershell.exe
Token: SeDebugPrivilege	384	XClient111.exe
Token: SeDebugPrivilege	3592	CelestialUpdate.exe
Token: SeDebugPrivilege	2936	CelestialUpdate.exe
Token: SeDebugPrivilege	4816	CelestialUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
384	XClient111.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 384 wrote to memory of 1748	384	XClient111.exe	87
PID 384 wrote to memory of 1748	384	XClient111.exe	87
PID 384 wrote to memory of 1776	384	XClient111.exe	89
PID 384 wrote to memory of 1776	384	XClient111.exe	89
PID 384 wrote to memory of 5036	384	XClient111.exe	91
PID 384 wrote to memory of 5036	384	XClient111.exe	91
PID 384 wrote to memory of 2728	384	XClient111.exe	93
PID 384 wrote to memory of 2728	384	XClient111.exe	93
PID 384 wrote to memory of 2904	384	XClient111.exe	95
PID 384 wrote to memory of 2904	384	XClient111.exe	95

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\XClient111.exe
"C:\Users\Admin\AppData\Local\Temp\XClient111.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:384
- 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\XClient111.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1748
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient111.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1776
- 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\CelestialUpdate.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5036
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'CelestialUpdate.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2728
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "CelestialUpdate" /tr "C:\Users\Admin\AppData\Local\Temp\CelestialUpdate.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2904

C:\Users\Admin\AppData\Local\Temp\CelestialUpdate.exe
C:\Users\Admin\AppData\Local\Temp\CelestialUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3592

C:\Users\Admin\AppData\Local\Temp\CelestialUpdate.exe
C:\Users\Admin\AppData\Local\Temp\CelestialUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2936

C:\Users\Admin\AppData\Local\Temp\CelestialUpdate.exe
C:\Users\Admin\AppData\Local\Temp\CelestialUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4816

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\CelestialUpdate.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
d8cb3e9459807e35f02130fad3f9860d

SHA1
5af7f32cb8a30e850892b15e9164030a041f4bd6

SHA256
2b139c74072ccbdaa17b950f32a6dbc934dfb7af9973d97c9b0d9c498012ba68

SHA512
045239ba31367fbdd59e883f74eafc05724e23bd6e8f0c1e7171ea2496a497eb9e0cfcb57285bb81c4d569daadba43d6ef64c626ca48f1e2a59e8d97f0cc9184

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

Filesize
944B

MD5
4178a021dab6578724f63a6a72b9b13b

SHA1
8e5d61c21edaafe4e2257ebe53f9b37b723838b7

SHA256
347338241585c510bb1fafae13447879318610ca4d844b0e73089957911d77fe

SHA512
0f49991948129415c2a02298072055d4de521e4a8cb9ae887bb2096683668fcb491b99d58fd6e239463a5ac981d756c4b2827cb52c1e1253b9cb114095e140c9

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

Filesize
75KB

MD5
1c7d67e357a4c6f86fde169b8fa74639

SHA1
4168ae0daa5e17cd0928c7542e49bde8490acdb9

SHA256
4094fea68e7a41431fe15eaf1ebbf4d88d20c10e01d4c32e4b466757e626964f

SHA512
a9b87f16bd144568182d2f2dc19855d57be54b73f3066cbfc299f6132b41cd2cd49fdd4d2921d2dedf17b05f5a244c9b41dc8ff500140cbe760e11daf9038205

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_p4ok05mt.u1b.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/384-1-0x0000000000990000-0x00000000009AA000-memory.dmp

Filesize
104KB

Download
memory/384-2-0x00007FFB5C280000-0x00007FFB5CD41000-memory.dmp

Filesize
10.8MB

Download
memory/384-0-0x00007FFB5C283000-0x00007FFB5C285000-memory.dmp

Filesize
8KB

Download
memory/384-59-0x00007FFB5C280000-0x00007FFB5CD41000-memory.dmp

Filesize
10.8MB

Download
memory/384-58-0x00007FFB5C283000-0x00007FFB5C285000-memory.dmp

Filesize
8KB

Download
memory/1748-4-0x000001FA488B0000-0x000001FA488D2000-memory.dmp

Filesize
136KB

Download
memory/1748-19-0x00007FFB5C280000-0x00007FFB5CD41000-memory.dmp

Filesize
10.8MB

Download
memory/1748-16-0x00007FFB5C280000-0x00007FFB5CD41000-memory.dmp

Filesize
10.8MB

Download
memory/1748-15-0x00007FFB5C280000-0x00007FFB5CD41000-memory.dmp

Filesize
10.8MB

Download
memory/1748-14-0x00007FFB5C280000-0x00007FFB5CD41000-memory.dmp

Filesize
10.8MB

Download
memory/1748-3-0x00007FFB5C280000-0x00007FFB5CD41000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads