xworm | 9239e706f06a5a88aec93df74a88b934fd403c18b9c63a0abd32c43cba11399f

General

Target

XClient.exe
Size

167KB
MD5

a7df6dfed10d54c4a59828be8ce7bd71
SHA1

e5075061df638bf627e98c2ffb8dde99ce1d6ff7
SHA256

9239e706f06a5a88aec93df74a88b934fd403c18b9c63a0abd32c43cba11399f
SHA512

eb20afca81a58e769e8cebce8ed7548802e52abc90bc31d63a57e9ea9ddb4311ceb6e5f0418eb62e0d2e2e5de64f368dd4328d702c61c5bcc4b20f17da844dc2
SSDEEP

3072:zZn1arYF49IMOwgRUGKXs+S++7KFSbxeY+qDDrMK:NAri49LGqStKEbxI

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

127.0.0.1:7000

Mutex

tTl1Y5wGzkYBSyRY

Attributes

Install_directory
%ProgramData%
install_file
gamesamse.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/5336-1-0x0000000000CC0000-0x0000000000CEE000-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
3384	powershell.exe
4116	powershell.exe
408	powershell.exe
2328	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gamesamse.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gamesamse.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-1-5-21-3870231897-2573482396-1083937135-1000\Software\Microsoft\Windows\CurrentVersion\Run\gamesamse = "C:\\ProgramData\\gamesamse.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

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
1468	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3384	powershell.exe
3384	powershell.exe
4116	powershell.exe
4116	powershell.exe
408	powershell.exe
408	powershell.exe
2328	powershell.exe
2328	powershell.exe
5336	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	5336	XClient.exe
Token: SeDebugPrivilege	3384	powershell.exe
Token: SeDebugPrivilege	4116	powershell.exe
Token: SeDebugPrivilege	408	powershell.exe
Token: SeDebugPrivilege	2328	powershell.exe
Token: SeDebugPrivilege	5336	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5336	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 5336 wrote to memory of 3384	5336	XClient.exe	79
PID 5336 wrote to memory of 3384	5336	XClient.exe	79
PID 5336 wrote to memory of 4116	5336	XClient.exe	81
PID 5336 wrote to memory of 4116	5336	XClient.exe	81
PID 5336 wrote to memory of 408	5336	XClient.exe	83
PID 5336 wrote to memory of 408	5336	XClient.exe	83
PID 5336 wrote to memory of 2328	5336	XClient.exe	85
PID 5336 wrote to memory of 2328	5336	XClient.exe	85
PID 5336 wrote to memory of 1468	5336	XClient.exe	87
PID 5336 wrote to memory of 1468	5336	XClient.exe	87

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:5336
- 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:3384
- 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:4116
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\gamesamse.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:408
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'gamesamse.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2328
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "gamesamse" /tr "C:\ProgramData\gamesamse.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1468

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

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\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
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

Filesize
944B

MD5
8cb7f4b4ab204cacd1af6b29c2a2042c

SHA1
244540c38e33eac05826d54282a0bfa60340d6a1

SHA256
4994013dabe4f131d401879278eee147add6349124ea6452358dca7e2344c7a6

SHA512
7651cb6863a425840db610253151e271d3e8da26a8c633ce484247266fa226792ecb84b9578df3ab17fef84a5dfcad417b63a7df59c9650a907e08d59b91dd6e

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

Filesize
944B

MD5
64497dba662bee5d7ae7a3c76a72ed88

SHA1
edc027042b9983f13d074ba9eed8b78e55e4152e

SHA256
ca69ebbd2c9c185f0647fb2122d7a26e7d23af06a1950fb25ac327d869687b47

SHA512
25da69ec86ba0df6c7da60f722cc2919c59c91f2bb03137e0e87771936e5271522d48eef98030a0da41f7a707d82221d35fb016f8bb9a294e87be114adbe3522

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3vbixfl1.0my.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3384-12-0x00007FFF51770000-0x00007FFF52232000-memory.dmp

Filesize
10.8MB

Download
memory/3384-13-0x00007FFF51770000-0x00007FFF52232000-memory.dmp

Filesize
10.8MB

Download
memory/3384-14-0x00007FFF51770000-0x00007FFF52232000-memory.dmp

Filesize
10.8MB

Download
memory/3384-15-0x00007FFF51770000-0x00007FFF52232000-memory.dmp

Filesize
10.8MB

Download
memory/3384-16-0x00007FFF51770000-0x00007FFF52232000-memory.dmp

Filesize
10.8MB

Download
memory/3384-19-0x00007FFF51770000-0x00007FFF52232000-memory.dmp

Filesize
10.8MB

Download
memory/3384-11-0x0000024049F90000-0x0000024049FB2000-memory.dmp

Filesize
136KB

Download
memory/5336-0-0x00007FFF51773000-0x00007FFF51775000-memory.dmp

Filesize
8KB

Download
memory/5336-2-0x00007FFF51770000-0x00007FFF52232000-memory.dmp

Filesize
10.8MB

Download
memory/5336-1-0x0000000000CC0000-0x0000000000CEE000-memory.dmp

Filesize
184KB

Download
memory/5336-55-0x00007FFF51770000-0x00007FFF52232000-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