xworm | e53bd0b8797b8c0cc32875dba3469b938eb8d1c3812b2829378cdb7d40b62654

General

Target

XClient (1).exe
Size

41KB
MD5

8ac12cc24b5ac76188fe9612dc51777e
SHA1

0c0dddf34dbf7b95e82c58fdb7cfabb80db90430
SHA256

e53bd0b8797b8c0cc32875dba3469b938eb8d1c3812b2829378cdb7d40b62654
SHA512

02c4abdc825b0d3b9a88a1d66232d6f42497b7d83c6bfc473df8efbc0350371653d3ce220409aa5968cf71396ec230dea52e3793085d1f06d2338e4360c8bc93
SSDEEP

768:LrJDweBDuOkScrbsN/x6WECAr43MkfJF5Pa9p+U6iOwhF3/ibK:pDwewicrbsN/YDRr4RF49IU6iOwv6G

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

57.128.132.221:7000

Mutex

A0pVR4huor1J3yZ3

Attributes

Install_directory
%AppData%
install_file
Win32runtime.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral5/memory/1424-1-0x0000000000440000-0x0000000000450000-memory.dmp	family_xworm
behavioral5/files/0x002000000002ab97-56.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
2512	powershell.exe
3752	powershell.exe
2800	powershell.exe
400	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Win32runtime.lnk	XClient (1).exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Win32runtime.lnk	XClient (1).exe

Executes dropped EXE 2 IoCs

pid	Process
3972	Win32runtime.exe
3204	Win32runtime.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-1-5-21-556537508-2730415644-482548075-1000\Software\Microsoft\Windows\CurrentVersion\Run\Win32runtime = "C:\\Users\\Admin\\AppData\\Roaming\\Win32runtime.exe"	XClient (1).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
1552	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2512	powershell.exe
2512	powershell.exe
3752	powershell.exe
3752	powershell.exe
2800	powershell.exe
2800	powershell.exe
400	powershell.exe
400	powershell.exe
1424	XClient (1).exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1424	XClient (1).exe
Token: SeDebugPrivilege	2512	powershell.exe
Token: SeDebugPrivilege	3752	powershell.exe
Token: SeDebugPrivilege	2800	powershell.exe
Token: SeDebugPrivilege	400	powershell.exe
Token: SeDebugPrivilege	1424	XClient (1).exe
Token: SeDebugPrivilege	3972	Win32runtime.exe
Token: SeDebugPrivilege	3204	Win32runtime.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1424	XClient (1).exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1424 wrote to memory of 2512	1424	XClient (1).exe	78
PID 1424 wrote to memory of 2512	1424	XClient (1).exe	78
PID 1424 wrote to memory of 3752	1424	XClient (1).exe	80
PID 1424 wrote to memory of 3752	1424	XClient (1).exe	80
PID 1424 wrote to memory of 2800	1424	XClient (1).exe	82
PID 1424 wrote to memory of 2800	1424	XClient (1).exe	82
PID 1424 wrote to memory of 400	1424	XClient (1).exe	84
PID 1424 wrote to memory of 400	1424	XClient (1).exe	84
PID 1424 wrote to memory of 1552	1424	XClient (1).exe	86
PID 1424 wrote to memory of 1552	1424	XClient (1).exe	86

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 (1).exe
"C:\Users\Admin\AppData\Local\Temp\XClient (1).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:1424
- 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 (1).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2512
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient (1).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3752
- 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\Win32runtime.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2800
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Win32runtime.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:400
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Win32runtime" /tr "C:\Users\Admin\AppData\Roaming\Win32runtime.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1552

C:\Users\Admin\AppData\Roaming\Win32runtime.exe
C:\Users\Admin\AppData\Roaming\Win32runtime.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3972

C:\Users\Admin\AppData\Roaming\Win32runtime.exe
C:\Users\Admin\AppData\Roaming\Win32runtime.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3204

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\Win32runtime.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
781da0576417bf414dc558e5a315e2be

SHA1
215451c1e370be595f1c389f587efeaa93108b4c

SHA256
41a5aef8b0bbeea2766f40a7bba2c78322379f167c610f7055ccb69e7db030fe

SHA512
24e283aa30a2903ebe154dad49b26067a45e46fec57549ad080d3b9ec3f272044efaaed3822d067837f5521262192f466c47195ffe7f75f8c7c5dcf3159ea737

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cqvtfzge.xgt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\Win32runtime.exe

Filesize
41KB

MD5
8ac12cc24b5ac76188fe9612dc51777e

SHA1
0c0dddf34dbf7b95e82c58fdb7cfabb80db90430

SHA256
e53bd0b8797b8c0cc32875dba3469b938eb8d1c3812b2829378cdb7d40b62654

SHA512
02c4abdc825b0d3b9a88a1d66232d6f42497b7d83c6bfc473df8efbc0350371653d3ce220409aa5968cf71396ec230dea52e3793085d1f06d2338e4360c8bc93

Download Submit
memory/1424-1-0x0000000000440000-0x0000000000450000-memory.dmp

Filesize
64KB

Download
memory/1424-2-0x00007FF9E0870000-0x00007FF9E1332000-memory.dmp

Filesize
10.8MB

Download
memory/1424-3-0x00007FF9E0870000-0x00007FF9E1332000-memory.dmp

Filesize
10.8MB

Download
memory/1424-0-0x00007FF9E0873000-0x00007FF9E0875000-memory.dmp

Filesize
8KB

Download
memory/2512-4-0x00007FF9E0870000-0x00007FF9E1332000-memory.dmp

Filesize
10.8MB

Download
memory/2512-20-0x00007FF9E0870000-0x00007FF9E1332000-memory.dmp

Filesize
10.8MB

Download
memory/2512-17-0x00007FF9E0870000-0x00007FF9E1332000-memory.dmp

Filesize
10.8MB

Download
memory/2512-16-0x00007FF9E0870000-0x00007FF9E1332000-memory.dmp

Filesize
10.8MB

Download
memory/2512-15-0x00007FF9E0870000-0x00007FF9E1332000-memory.dmp

Filesize
10.8MB

Download
memory/2512-14-0x00007FF9E0870000-0x00007FF9E1332000-memory.dmp

Filesize
10.8MB

Download
memory/2512-13-0x000001FC861E0000-0x000001FC86202000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads