xworm | f9a8f2e29dc5966bcb6f5a9b118a0e2cb2807619d9ce16dbb18e71737bf44ac8

General

Target

XClient.exe
Size

43KB
MD5

9a6ce16635ceb90281c16062ae68a06c
SHA1

319ee0e49c3a23cf6afa7cb34d358247b6fbc89e
SHA256

f9a8f2e29dc5966bcb6f5a9b118a0e2cb2807619d9ce16dbb18e71737bf44ac8
SHA512

ec1e632a6efc0c8aa20386c3925a3b3a2941a33992d788de6d5a777a10c267e073b57d8a95af3d00684b0c4c33efb060f1d126c95179de731a19c71da36eb589
SSDEEP

768:ZY8ErOTKMYpyyNRyjymZ49pnWwFFEPh9Cf66FOChtk2lHxfgm:6/OUTc6Fw9y66FOCIwRt

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.0

C2

lunassworld-50930.portmap.host:5508

Mutex

tBgRQhKX6pJuMKdy

Attributes

Install_directory
%AppData%
install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral4/memory/488-1-0x0000000000720000-0x0000000000732000-memory.dmp	family_xworm
behavioral4/files/0x000a00000002a9a7-47.dat	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
3356	powershell.exe
3588	powershell.exe
3040	powershell.exe

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 10 IoCs

pid	Process
1720	XClient.exe
3620	XClient.exe
4568	XClient.exe
2140	XClient.exe
4804	XClient.exe
744	XClient.exe
1064	XClient.exe
3900	XClient.exe
4188	XClient.exe
1556	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-1-5-21-2994005945-4089876968-1367784197-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.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
1	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2116	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
3356	powershell.exe
3356	powershell.exe
3588	powershell.exe
3588	powershell.exe
3040	powershell.exe
3040	powershell.exe
488	XClient.exe

Suspicious use of AdjustPrivilegeToken 15 IoCs

description	pid	Process
Token: SeDebugPrivilege	488	XClient.exe
Token: SeDebugPrivilege	3356	powershell.exe
Token: SeDebugPrivilege	3588	powershell.exe
Token: SeDebugPrivilege	3040	powershell.exe
Token: SeDebugPrivilege	488	XClient.exe
Token: SeDebugPrivilege	1720	XClient.exe
Token: SeDebugPrivilege	3620	XClient.exe
Token: SeDebugPrivilege	4568	XClient.exe
Token: SeDebugPrivilege	2140	XClient.exe
Token: SeDebugPrivilege	4804	XClient.exe
Token: SeDebugPrivilege	744	XClient.exe
Token: SeDebugPrivilege	1064	XClient.exe
Token: SeDebugPrivilege	3900	XClient.exe
Token: SeDebugPrivilege	4188	XClient.exe
Token: SeDebugPrivilege	1556	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
488	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 488 wrote to memory of 3356	488	XClient.exe	79
PID 488 wrote to memory of 3356	488	XClient.exe	79
PID 488 wrote to memory of 3588	488	XClient.exe	81
PID 488 wrote to memory of 3588	488	XClient.exe	81
PID 488 wrote to memory of 3040	488	XClient.exe	83
PID 488 wrote to memory of 3040	488	XClient.exe	83
PID 488 wrote to memory of 2116	488	XClient.exe	85
PID 488 wrote to memory of 2116	488	XClient.exe	85

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\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:488
- 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:3356
- 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:3588
- 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:3040
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Creates scheduled task(s)
  PID:2116

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1720

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3620

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4568

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2140

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4804

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:744

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1064

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3900

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4188

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1556

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\XClient.exe.log

Filesize
654B

MD5
2cbbb74b7da1f720b48ed31085cbd5b8

SHA1
79caa9a3ea8abe1b9c4326c3633da64a5f724964

SHA256
e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

SHA512
ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

Download Submit
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
e3840d9bcedfe7017e49ee5d05bd1c46

SHA1
272620fb2605bd196df471d62db4b2d280a363c6

SHA256
3ac83e70415b9701ee71a4560232d7998e00c3db020fde669eb01b8821d2746f

SHA512
76adc88ab3930acc6b8b7668e2de797b8c00edcfc41660ee4485259c72a8adf162db62c2621ead5a9950f12bfe8a76ccab79d02fda11860afb0e217812cac376

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

Filesize
944B

MD5
050567a067ffea4eb40fe2eefebdc1ee

SHA1
6e1fb2c7a7976e0724c532449e97722787a00fec

SHA256
3952d5b543e5cb0cb84014f4ad9f5f1b7166f592d28640cbc3d914d0e6f41d2e

SHA512
341ad71ef7e850b10e229666312e4bca87a0ed9fe25ba4b0ab65661d5a0efa855db0592153106da07134d8fc2c6c0e44709bf38183c9a574a1fa543189971259

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pkhnxf2j.bk3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
43KB

MD5
9a6ce16635ceb90281c16062ae68a06c

SHA1
319ee0e49c3a23cf6afa7cb34d358247b6fbc89e

SHA256
f9a8f2e29dc5966bcb6f5a9b118a0e2cb2807619d9ce16dbb18e71737bf44ac8

SHA512
ec1e632a6efc0c8aa20386c3925a3b3a2941a33992d788de6d5a777a10c267e073b57d8a95af3d00684b0c4c33efb060f1d126c95179de731a19c71da36eb589

Download Submit
memory/488-0-0x00007FFCF01B3000-0x00007FFCF01B5000-memory.dmp

Filesize
8KB

Download
memory/488-2-0x00007FFCF01B0000-0x00007FFCF0C72000-memory.dmp

Filesize
10.8MB

Download
memory/488-49-0x00007FFCF01B0000-0x00007FFCF0C72000-memory.dmp

Filesize
10.8MB

Download
memory/488-1-0x0000000000720000-0x0000000000732000-memory.dmp

Filesize
72KB

Download
memory/3356-12-0x00007FFCF01B0000-0x00007FFCF0C72000-memory.dmp

Filesize
10.8MB

Download
memory/3356-13-0x00007FFCF01B0000-0x00007FFCF0C72000-memory.dmp

Filesize
10.8MB

Download
memory/3356-14-0x00007FFCF01B0000-0x00007FFCF0C72000-memory.dmp

Filesize
10.8MB

Download
memory/3356-15-0x00007FFCF01B0000-0x00007FFCF0C72000-memory.dmp

Filesize
10.8MB

Download
memory/3356-16-0x00007FFCF01B0000-0x00007FFCF0C72000-memory.dmp

Filesize
10.8MB

Download
memory/3356-19-0x00007FFCF01B0000-0x00007FFCF0C72000-memory.dmp

Filesize
10.8MB

Download
memory/3356-8-0x000001D5DE7A0000-0x000001D5DE7C2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads