xworm | d1029c3fa13d882ac717748fa973d8904840d8b81956979d965a8f3aa2921bbf

General

Target

nlcs2crcack.exe
Size

165KB
MD5

ccde94532dcba460b2d44773998c3021
SHA1

598c90a91be55aa76532245018e2e997503c32e0
SHA256

d1029c3fa13d882ac717748fa973d8904840d8b81956979d965a8f3aa2921bbf
SHA512

49211f29ddf8bb2cc059bff5f4090f876c9d4948bd5ba06ba5249aac3318ce29c7c11f4edf73f31f8c4760fe6e7dde323e0845faff9397014e3dd809c76db50b
SSDEEP

1536:bDIHj+5GGR9P5RtNOQLbUWw3VaHf9q6qSOCX8pazB4YiX:bDsjyGGTP55OQLbUWwI9OCX8gzB+X

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 3 IoCs

resource	yara_rule
behavioral1/memory/2328-1-0x0000000000280000-0x00000000002AE000-memory.dmp	family_xworm
behavioral1/files/0x000b000000015cdd-35.dat	family_xworm
behavioral1/memory/672-37-0x00000000002B0000-0x00000000002DE000-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
2136	powershell.exe
2080	powershell.exe
2764	powershell.exe
2748	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	nlcs2crcack.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	nlcs2crcack.exe

Executes dropped EXE 2 IoCs

pid	Process
672	XClient.exe
1872	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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	nlcs2crcack.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
1972	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2136	powershell.exe
2080	powershell.exe
2764	powershell.exe
2748	powershell.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2328	nlcs2crcack.exe
Token: SeDebugPrivilege	2136	powershell.exe
Token: SeDebugPrivilege	2080	powershell.exe
Token: SeDebugPrivilege	2764	powershell.exe
Token: SeDebugPrivilege	2748	powershell.exe
Token: SeDebugPrivilege	2328	nlcs2crcack.exe
Token: SeDebugPrivilege	672	XClient.exe
Token: SeDebugPrivilege	1872	XClient.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2328 wrote to memory of 2136	2328	nlcs2crcack.exe	32
PID 2328 wrote to memory of 2136	2328	nlcs2crcack.exe	32
PID 2328 wrote to memory of 2136	2328	nlcs2crcack.exe	32
PID 2328 wrote to memory of 2080	2328	nlcs2crcack.exe	34
PID 2328 wrote to memory of 2080	2328	nlcs2crcack.exe	34
PID 2328 wrote to memory of 2080	2328	nlcs2crcack.exe	34
PID 2328 wrote to memory of 2764	2328	nlcs2crcack.exe	36
PID 2328 wrote to memory of 2764	2328	nlcs2crcack.exe	36
PID 2328 wrote to memory of 2764	2328	nlcs2crcack.exe	36
PID 2328 wrote to memory of 2748	2328	nlcs2crcack.exe	38
PID 2328 wrote to memory of 2748	2328	nlcs2crcack.exe	38
PID 2328 wrote to memory of 2748	2328	nlcs2crcack.exe	38
PID 2328 wrote to memory of 1972	2328	nlcs2crcack.exe	40
PID 2328 wrote to memory of 1972	2328	nlcs2crcack.exe	40
PID 2328 wrote to memory of 1972	2328	nlcs2crcack.exe	40
PID 1796 wrote to memory of 672	1796	taskeng.exe	43
PID 1796 wrote to memory of 672	1796	taskeng.exe	43
PID 1796 wrote to memory of 672	1796	taskeng.exe	43
PID 1796 wrote to memory of 1872	1796	taskeng.exe	44
PID 1796 wrote to memory of 1872	1796	taskeng.exe	44
PID 1796 wrote to memory of 1872	1796	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\nlcs2crcack.exe
"C:\Users\Admin\AppData\Local\Temp\nlcs2crcack.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2328
- 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\nlcs2crcack.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2136
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'nlcs2crcack.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2080
- 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:2764
- 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:2748
- 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:1972

C:\Windows\system32\taskeng.exe
taskeng.exe {26246982-CAAB-4266-8B34-A83C5CDA6A48} S-1-5-21-312935884-697965778-3955649944-1000:MXQFNXLT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1796
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:672
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1872

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
ca2251df1d298c7940639c28975e29b3

SHA1
e809f0b09d15f3b4100089fcb73b1cce71b7a81b

SHA256
7a2457375cc8a7e54b2f0cad805e00af7c8ef4cfd3e95bc92ca7b5c23b2d57ab

SHA512
a606e69f1e6bbd10100885b558284086b988911b5f6e25839914adede5c109b85a003615e34c714e180ff8315084c968b0e63cb8115cc224029d694e5f0361b1

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

Filesize
165KB

MD5
ccde94532dcba460b2d44773998c3021

SHA1
598c90a91be55aa76532245018e2e997503c32e0

SHA256
d1029c3fa13d882ac717748fa973d8904840d8b81956979d965a8f3aa2921bbf

SHA512
49211f29ddf8bb2cc059bff5f4090f876c9d4948bd5ba06ba5249aac3318ce29c7c11f4edf73f31f8c4760fe6e7dde323e0845faff9397014e3dd809c76db50b

Download Submit
memory/672-37-0x00000000002B0000-0x00000000002DE000-memory.dmp

Filesize
184KB

Download
memory/2080-15-0x000000001B510000-0x000000001B7F2000-memory.dmp

Filesize
2.9MB

Download
memory/2080-16-0x0000000002910000-0x0000000002918000-memory.dmp

Filesize
32KB

Download
memory/2136-7-0x0000000002D00000-0x0000000002D80000-memory.dmp

Filesize
512KB

Download
memory/2136-8-0x000000001B560000-0x000000001B842000-memory.dmp

Filesize
2.9MB

Download
memory/2136-9-0x0000000001E20000-0x0000000001E28000-memory.dmp

Filesize
32KB

Download
memory/2328-2-0x000007FEF61C0000-0x000007FEF6BAC000-memory.dmp

Filesize
9.9MB

Download
memory/2328-0-0x000007FEF61C3000-0x000007FEF61C4000-memory.dmp

Filesize
4KB

Download
memory/2328-28-0x000007FEF61C3000-0x000007FEF61C4000-memory.dmp

Filesize
4KB

Download
memory/2328-33-0x000007FEF61C0000-0x000007FEF6BAC000-memory.dmp

Filesize
9.9MB

Download
memory/2328-1-0x0000000000280000-0x00000000002AE000-memory.dmp

Filesize
184KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads