xworm | d42086188d177a3efbfa0d70daef5b9afc83313635c0bd792e865e537048f085

General

Target

midnightcs2.exe
Size

186KB
MD5

a8215742a95e9c168ccfc61b3b7e3499
SHA1

28125198889769fc28930a6ae8177de58ff99e75
SHA256

d42086188d177a3efbfa0d70daef5b9afc83313635c0bd792e865e537048f085
SHA512

7313357cbf14d574b4a17c0139098e4e2a91457a086707b3cda5de0d7bd028a37e55a220eab8108fe8a5fb27529c36944c105b0732ec32d258ba84844e2734b0
SSDEEP

3072:KiP2xSwpN+UzbEI7NO3n3GU9UYPziDfu7o:Kz7+UzbR7O9UYPym7

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

its-definitely.gl.at.ply.gg:32735

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/1508-1-0x0000000001170000-0x00000000011A4000-memory.dmp	family_xworm
behavioral1/files/0x000d000000018766-34.dat	family_xworm
behavioral1/memory/1976-36-0x0000000000280000-0x00000000002B4000-memory.dmp	family_xworm
behavioral1/memory/1884-39-0x00000000013C0000-0x00000000013F4000-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
2828	powershell.exe
2796	powershell.exe
2728	powershell.exe
3008	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	midnightcs2.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	midnightcs2.exe

Executes dropped EXE 2 IoCs

pid	Process
1976	XClient.exe
1884	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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	midnightcs2.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
4	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
2016	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2828	powershell.exe
2796	powershell.exe
2728	powershell.exe
3008	powershell.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1508	midnightcs2.exe
Token: SeDebugPrivilege	2828	powershell.exe
Token: SeDebugPrivilege	2796	powershell.exe
Token: SeDebugPrivilege	2728	powershell.exe
Token: SeDebugPrivilege	3008	powershell.exe
Token: SeDebugPrivilege	1508	midnightcs2.exe
Token: SeDebugPrivilege	1976	XClient.exe
Token: SeDebugPrivilege	1884	XClient.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1508 wrote to memory of 2828	1508	midnightcs2.exe	31
PID 1508 wrote to memory of 2828	1508	midnightcs2.exe	31
PID 1508 wrote to memory of 2828	1508	midnightcs2.exe	31
PID 1508 wrote to memory of 2796	1508	midnightcs2.exe	33
PID 1508 wrote to memory of 2796	1508	midnightcs2.exe	33
PID 1508 wrote to memory of 2796	1508	midnightcs2.exe	33
PID 1508 wrote to memory of 2728	1508	midnightcs2.exe	35
PID 1508 wrote to memory of 2728	1508	midnightcs2.exe	35
PID 1508 wrote to memory of 2728	1508	midnightcs2.exe	35
PID 1508 wrote to memory of 3008	1508	midnightcs2.exe	37
PID 1508 wrote to memory of 3008	1508	midnightcs2.exe	37
PID 1508 wrote to memory of 3008	1508	midnightcs2.exe	37
PID 1508 wrote to memory of 2016	1508	midnightcs2.exe	40
PID 1508 wrote to memory of 2016	1508	midnightcs2.exe	40
PID 1508 wrote to memory of 2016	1508	midnightcs2.exe	40
PID 2104 wrote to memory of 1976	2104	taskeng.exe	43
PID 2104 wrote to memory of 1976	2104	taskeng.exe	43
PID 2104 wrote to memory of 1976	2104	taskeng.exe	43
PID 2104 wrote to memory of 1884	2104	taskeng.exe	44
PID 2104 wrote to memory of 1884	2104	taskeng.exe	44
PID 2104 wrote to memory of 1884	2104	taskeng.exe	44

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\midnightcs2.exe
"C:\Users\Admin\AppData\Local\Temp\midnightcs2.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1508
- 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\midnightcs2.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2828
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'midnightcs2.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2796
- 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:2728
- 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:3008
- 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⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2016

C:\Windows\system32\taskeng.exe
taskeng.exe {76EEC3D8-06DB-48AF-8CA7-CAC3664FFBE3} S-1-5-21-2703099537-420551529-3771253338-1000:XECUDNCD\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2104
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1976
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1884

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
08060c20537fd4c5a5db5827d8ffa4b8

SHA1
f9518df64228a6c88f7b887bb72b736a518f2392

SHA256
534077a585c8f2077ab8fe092dba8fff453695953493a15f0503cecfdd6416ce

SHA512
b67949d8a2d57b8511fef2548d6fde6f751250796099689784c6632b470d79351d85695d4f4391e1d1d8fdab87c8f5a469d9261b709cc00111c75881ef867489

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

Filesize
186KB

MD5
a8215742a95e9c168ccfc61b3b7e3499

SHA1
28125198889769fc28930a6ae8177de58ff99e75

SHA256
d42086188d177a3efbfa0d70daef5b9afc83313635c0bd792e865e537048f085

SHA512
7313357cbf14d574b4a17c0139098e4e2a91457a086707b3cda5de0d7bd028a37e55a220eab8108fe8a5fb27529c36944c105b0732ec32d258ba84844e2734b0

Download Submit
memory/1508-27-0x000007FEF67C3000-0x000007FEF67C4000-memory.dmp

Filesize
4KB

Download
memory/1508-2-0x000007FEF67C0000-0x000007FEF71AC000-memory.dmp

Filesize
9.9MB

Download
memory/1508-0-0x000007FEF67C3000-0x000007FEF67C4000-memory.dmp

Filesize
4KB

Download
memory/1508-32-0x000007FEF67C0000-0x000007FEF71AC000-memory.dmp

Filesize
9.9MB

Download
memory/1508-1-0x0000000001170000-0x00000000011A4000-memory.dmp

Filesize
208KB

Download
memory/1884-39-0x00000000013C0000-0x00000000013F4000-memory.dmp

Filesize
208KB

Download
memory/1976-36-0x0000000000280000-0x00000000002B4000-memory.dmp

Filesize
208KB

Download
memory/2796-15-0x000000001B690000-0x000000001B972000-memory.dmp

Filesize
2.9MB

Download
memory/2796-16-0x0000000001E50000-0x0000000001E58000-memory.dmp

Filesize
32KB

Download
memory/2828-7-0x0000000002BB0000-0x0000000002C30000-memory.dmp

Filesize
512KB

Download
memory/2828-8-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/2828-9-0x0000000002910000-0x0000000002918000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads