xworm | 0272bd065f97c4038dd4369a7e28e3b5eaf679be188f1e0b866d6c1de4542e73

General

Target

XClient.exe
Size

90KB
MD5

ceec407314c69b3ef0d1bebd75983973
SHA1

28ddf8f4711cad7e4e25a4ec83113fa4ea33589e
SHA256

0272bd065f97c4038dd4369a7e28e3b5eaf679be188f1e0b866d6c1de4542e73
SHA512

1cd72630d9b4d46fd0d16be9c42f40e3bec3c0cdfd339c1f7e13caa5c040469137ca355b1a1aa5b26a95520d831581f5dd9fcec42ed9a4bf1ca3c09ea2ab4f4a
SSDEEP

1536:7x4+aR/KoqTG7HRo5iLGbv4nJP0LyVs7IL563dIxtgKQOk5LMfKwdL7:7wd3o8pKbv4nJ0yVsuOf7Ok5YfKO7

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

job-moore.gl.at.ply.gg:49404

Attributes

Install_directory
%ProgramData%
install_file
Helper.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/3596-1-0x0000000000350000-0x000000000036C000-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
4020	powershell.exe
3924	powershell.exe
4396	powershell.exe
4604	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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WindowsDefender.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WindowsDefender.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-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindowsDefender = "C:\\ProgramData\\WindowsDefender"	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
16	ip-api.com

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4100	timeout.exe

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
4808	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4020	powershell.exe
4020	powershell.exe
3924	powershell.exe
3924	powershell.exe
4396	powershell.exe
4396	powershell.exe
4604	powershell.exe
4604	powershell.exe
3596	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3596	XClient.exe
Token: SeDebugPrivilege	4020	powershell.exe
Token: SeDebugPrivilege	3924	powershell.exe
Token: SeDebugPrivilege	4396	powershell.exe
Token: SeDebugPrivilege	4604	powershell.exe
Token: SeDebugPrivilege	3596	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3596	XClient.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3596 wrote to memory of 4020	3596	XClient.exe	92
PID 3596 wrote to memory of 4020	3596	XClient.exe	92
PID 3596 wrote to memory of 3924	3596	XClient.exe	96
PID 3596 wrote to memory of 3924	3596	XClient.exe	96
PID 3596 wrote to memory of 4396	3596	XClient.exe	100
PID 3596 wrote to memory of 4396	3596	XClient.exe	100
PID 3596 wrote to memory of 4604	3596	XClient.exe	102
PID 3596 wrote to memory of 4604	3596	XClient.exe	102
PID 3596 wrote to memory of 4808	3596	XClient.exe	104
PID 3596 wrote to memory of 4808	3596	XClient.exe	104
PID 3596 wrote to memory of 4188	3596	XClient.exe	113
PID 3596 wrote to memory of 4188	3596	XClient.exe	113
PID 3596 wrote to memory of 4956	3596	XClient.exe	115
PID 3596 wrote to memory of 4956	3596	XClient.exe	115
PID 4956 wrote to memory of 4100	4956	cmd.exe	117
PID 4956 wrote to memory of 4100	4956	cmd.exe	117

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⤵
- 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:3596
- 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:4020
- 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:3924
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\WindowsDefender'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4396
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'WindowsDefender'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4604
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "WindowsDefender" /tr "C:\ProgramData\WindowsDefender"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4808
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /delete /f /tn "WindowsDefender"
  2⤵
  PID:4188
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1968.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4956
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4100

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\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
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

Filesize
944B

MD5
eb033be02578f9635ec47bdc1de5c3fb

SHA1
ec356bc87381354a06baa9c30e8c3ac3d30e0f6f

SHA256
bd827af3192bf83c75a32e51ed2de83bd3b90d6b99350721a189a57cec15d063

SHA512
4d8778503646f7016df73ff9d204760f4fe4d2b24157920ac3e5651653373975b2f2d229530143059f11b16c42822ad7963e628ad6066022ee712c17d90595ed

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\Temp\__PSScriptPolicyTest_utotfkpy.osk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp1968.tmp.bat

Filesize
159B

MD5
c27d28ffd860ae79f916032200c2719f

SHA1
dea692056ecc4c755ef547631620ae71bdf6a4c7

SHA256
61b193a2f7053acbe91e4a6b356fcf325bca671caf57013dc8fbf3f5d5db60e3

SHA512
a36247be2e79f28a9cbee78abab994e37d95c0b1e0f105af9d3f62d3357312cfe5ec8d9d298b09e2b0e9b779cf571671d3e565255371d00a6783dd22c6b7aa6d

Download Submit
memory/3596-53-0x00007FFD50683000-0x00007FFD50685000-memory.dmp

Filesize
8KB

Download
memory/3596-58-0x000000001C610000-0x000000001C61C000-memory.dmp

Filesize
48KB

Download
memory/3596-57-0x00007FFD50680000-0x00007FFD51141000-memory.dmp

Filesize
10.8MB

Download
memory/3596-0-0x00007FFD50683000-0x00007FFD50685000-memory.dmp

Filesize
8KB

Download
memory/3596-66-0x00007FFD50680000-0x00007FFD51141000-memory.dmp

Filesize
10.8MB

Download
memory/3596-2-0x00007FFD50680000-0x00007FFD51141000-memory.dmp

Filesize
10.8MB

Download
memory/3596-1-0x0000000000350000-0x000000000036C000-memory.dmp

Filesize
112KB

Download
memory/4020-13-0x0000024C4AB70000-0x0000024C4AB92000-memory.dmp

Filesize
136KB

Download
memory/4020-18-0x00007FFD50680000-0x00007FFD51141000-memory.dmp

Filesize
10.8MB

Download
memory/4020-15-0x00007FFD50680000-0x00007FFD51141000-memory.dmp

Filesize
10.8MB

Download
memory/4020-14-0x00007FFD50680000-0x00007FFD51141000-memory.dmp

Filesize
10.8MB

Download
memory/4020-12-0x00007FFD50680000-0x00007FFD51141000-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