xworm | a827b4c334d1614b5bf2f6cd6c64a380825073bf2a3adbd93004e5f5063c92f4

General

Target

XN05R_injector-helper.exe
Size

166KB
MD5

ab379c38321e11520f57c362c0dfbc73
SHA1

db66343fd289e8f6466abf35e3c97cb4604e580f
SHA256

a827b4c334d1614b5bf2f6cd6c64a380825073bf2a3adbd93004e5f5063c92f4
SHA512

deb2257401ba7d4b4d81280528752807f4c566543a6bb32dc277e2b8812fb37503638135365ec80c56f9d81fa42ef996dc9335e4a7be1dcaa2c722abb8416c08
SSDEEP

3072:ltmh0cYth8+bk9MuO5wE5SKBz65/M6If+3Js+3JFkKeTnQ:ltmWcUbbfi8SKxBt25

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%Temp%
install_file
svchost.exe
pastebin_url
https://pastebin.com/raw/kADeGNZE

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2696-1-0x00000000012D0000-0x0000000001300000-memory.dmp	family_xworm
behavioral1/files/0x000e000000012268-33.dat	family_xworm
behavioral1/memory/628-35-0x00000000000F0000-0x0000000000120000-memory.dmp	family_xworm
behavioral1/memory/2096-39-0x0000000000D60000-0x0000000000D90000-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
2948	powershell.exe
2824	powershell.exe
2600	powershell.exe
2012	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	XN05R_injector-helper.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	XN05R_injector-helper.exe

Executes dropped EXE 3 IoCs

pid	Process
628	svchost.exe
2096	svchost.exe
2032	svchost.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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost.exe"	XN05R_injector-helper.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
4	pastebin.com
5	pastebin.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
2964	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2948	powershell.exe
2824	powershell.exe
2600	powershell.exe
2012	powershell.exe
2696	XN05R_injector-helper.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2696	XN05R_injector-helper.exe
Token: SeDebugPrivilege	2948	powershell.exe
Token: SeDebugPrivilege	2824	powershell.exe
Token: SeDebugPrivilege	2600	powershell.exe
Token: SeDebugPrivilege	2012	powershell.exe
Token: SeDebugPrivilege	2696	XN05R_injector-helper.exe
Token: SeDebugPrivilege	628	svchost.exe
Token: SeDebugPrivilege	2096	svchost.exe
Token: SeDebugPrivilege	2032	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2696	XN05R_injector-helper.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2696 wrote to memory of 2948	2696	XN05R_injector-helper.exe	30
PID 2696 wrote to memory of 2948	2696	XN05R_injector-helper.exe	30
PID 2696 wrote to memory of 2948	2696	XN05R_injector-helper.exe	30
PID 2696 wrote to memory of 2824	2696	XN05R_injector-helper.exe	32
PID 2696 wrote to memory of 2824	2696	XN05R_injector-helper.exe	32
PID 2696 wrote to memory of 2824	2696	XN05R_injector-helper.exe	32
PID 2696 wrote to memory of 2600	2696	XN05R_injector-helper.exe	34
PID 2696 wrote to memory of 2600	2696	XN05R_injector-helper.exe	34
PID 2696 wrote to memory of 2600	2696	XN05R_injector-helper.exe	34
PID 2696 wrote to memory of 2012	2696	XN05R_injector-helper.exe	36
PID 2696 wrote to memory of 2012	2696	XN05R_injector-helper.exe	36
PID 2696 wrote to memory of 2012	2696	XN05R_injector-helper.exe	36
PID 2696 wrote to memory of 2964	2696	XN05R_injector-helper.exe	38
PID 2696 wrote to memory of 2964	2696	XN05R_injector-helper.exe	38
PID 2696 wrote to memory of 2964	2696	XN05R_injector-helper.exe	38
PID 2440 wrote to memory of 628	2440	taskeng.exe	41
PID 2440 wrote to memory of 628	2440	taskeng.exe	41
PID 2440 wrote to memory of 628	2440	taskeng.exe	41
PID 2440 wrote to memory of 2096	2440	taskeng.exe	43
PID 2440 wrote to memory of 2096	2440	taskeng.exe	43
PID 2440 wrote to memory of 2096	2440	taskeng.exe	43
PID 2440 wrote to memory of 2032	2440	taskeng.exe	45
PID 2440 wrote to memory of 2032	2440	taskeng.exe	45
PID 2440 wrote to memory of 2032	2440	taskeng.exe	45

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\XN05R_injector-helper.exe
"C:\Users\Admin\AppData\Local\Temp\XN05R_injector-helper.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:2696
- 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\XN05R_injector-helper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2948
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XN05R_injector-helper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2824
- 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\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2600
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2012
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2964

C:\Windows\system32\taskeng.exe
taskeng.exe {411D64CA-A6C1-4DAC-94DD-62DF1A6BBB62} S-1-5-21-1846800975-3917212583-2893086201-1000:ZQABOPWE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2440
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  C:\Users\Admin\AppData\Local\Temp\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:628
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  C:\Users\Admin\AppData\Local\Temp\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2096
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  C:\Users\Admin\AppData\Local\Temp\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2032

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\svchost.exe

Filesize
166KB

MD5
ab379c38321e11520f57c362c0dfbc73

SHA1
db66343fd289e8f6466abf35e3c97cb4604e580f

SHA256
a827b4c334d1614b5bf2f6cd6c64a380825073bf2a3adbd93004e5f5063c92f4

SHA512
deb2257401ba7d4b4d81280528752807f4c566543a6bb32dc277e2b8812fb37503638135365ec80c56f9d81fa42ef996dc9335e4a7be1dcaa2c722abb8416c08

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
d9a3ab6e3407e1c421f116c45fd32cf5

SHA1
806b3cb2ebbad10d455ebb6340e68befd2570ea3

SHA256
f02d59ea1883b0e4686cc06fcea9b4c3925c384729d450e5d3bc65e6c790f699

SHA512
ef3b16faf7a7e3be205dcac802deea379ca3c78fae361762084977150b555c123ad756271f3af7aca2d2c61ec3ca28b41684275eb3cc54f4ab758b1bbdf594ea

Download Submit
memory/628-35-0x00000000000F0000-0x0000000000120000-memory.dmp

Filesize
192KB

Download
memory/2096-39-0x0000000000D60000-0x0000000000D90000-memory.dmp

Filesize
192KB

Download
memory/2696-31-0x000007FEF6123000-0x000007FEF6124000-memory.dmp

Filesize
4KB

Download
memory/2696-1-0x00000000012D0000-0x0000000001300000-memory.dmp

Filesize
192KB

Download
memory/2696-36-0x000000001AC10000-0x000000001AC90000-memory.dmp

Filesize
512KB

Download
memory/2696-0-0x000007FEF6123000-0x000007FEF6124000-memory.dmp

Filesize
4KB

Download
memory/2696-30-0x000000001AC10000-0x000000001AC90000-memory.dmp

Filesize
512KB

Download
memory/2824-14-0x000000001B490000-0x000000001B772000-memory.dmp

Filesize
2.9MB

Download
memory/2824-15-0x0000000002990000-0x0000000002998000-memory.dmp

Filesize
32KB

Download
memory/2948-8-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download
memory/2948-7-0x000000001B620000-0x000000001B902000-memory.dmp

Filesize
2.9MB

Download
memory/2948-6-0x00000000028E0000-0x0000000002960000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads