xworm | b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb

General

Target

b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe
Size

75KB
MD5

a9fa87983b51d76f3a50af06c2cbb35b
SHA1

873cb3af6ebe410e2d3ff40ba7621be164503b1c
SHA256

b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb
SHA512

0db860c331f0b3c88f1cb64171bc464f28710be98dd1fa44ce61a44aa98f8ee82662010d9c3f8384d69868796152c2fe33c913ae1778df242248c230a58d7ae4
SSDEEP

1536:sYJn3x8bqIyJFjVKBjjbbrrbCSr1EQv6q3J6xZOyxfgMoJ:DnKHUFjgBjHHrbCw56HZOmLoJ

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:2523

match-remedies.gl.at.ply.gg:2523

Attributes

Install_directory
%AppData%
install_file
conhost.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2096-1-0x0000000000900000-0x000000000091A000-memory.dmp	family_xworm
behavioral1/files/0x000a000000018741-35.dat	family_xworm
behavioral1/memory/340-37-0x0000000001230000-0x000000000124A000-memory.dmp	family_xworm
behavioral1/memory/1312-40-0x00000000012D0000-0x00000000012EA000-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
2912	powershell.exe
2600	powershell.exe
2464	powershell.exe
2808	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\conhost.lnk	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\conhost.lnk	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe

Executes dropped EXE 2 IoCs

pid	Process
340	conhost.exe
1312	conhost.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-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\conhost = "C:\\Users\\Admin\\AppData\\Roaming\\conhost.exe"	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.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
2968	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2808	powershell.exe
2912	powershell.exe
2600	powershell.exe
2464	powershell.exe
2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe
Token: SeDebugPrivilege	2808	powershell.exe
Token: SeDebugPrivilege	2912	powershell.exe
Token: SeDebugPrivilege	2600	powershell.exe
Token: SeDebugPrivilege	2464	powershell.exe
Token: SeDebugPrivilege	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe
Token: SeDebugPrivilege	340	conhost.exe
Token: SeDebugPrivilege	1312	conhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2096 wrote to memory of 2808	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	32
PID 2096 wrote to memory of 2808	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	32
PID 2096 wrote to memory of 2808	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	32
PID 2096 wrote to memory of 2912	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	34
PID 2096 wrote to memory of 2912	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	34
PID 2096 wrote to memory of 2912	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	34
PID 2096 wrote to memory of 2600	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	36
PID 2096 wrote to memory of 2600	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	36
PID 2096 wrote to memory of 2600	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	36
PID 2096 wrote to memory of 2464	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	38
PID 2096 wrote to memory of 2464	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	38
PID 2096 wrote to memory of 2464	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	38
PID 2096 wrote to memory of 2968	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	40
PID 2096 wrote to memory of 2968	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	40
PID 2096 wrote to memory of 2968	2096	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	40
PID 1976 wrote to memory of 340	1976	taskeng.exe	43
PID 1976 wrote to memory of 340	1976	taskeng.exe	43
PID 1976 wrote to memory of 340	1976	taskeng.exe	43
PID 1976 wrote to memory of 1312	1976	taskeng.exe	44
PID 1976 wrote to memory of 1312	1976	taskeng.exe	44
PID 1976 wrote to memory of 1312	1976	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\b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe
"C:\Users\Admin\AppData\Local\Temp\b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.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:2096
- 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\b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2808
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2912
- 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\conhost.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 'conhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2464
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "conhost" /tr "C:\Users\Admin\AppData\Roaming\conhost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2968

C:\Windows\system32\taskeng.exe
taskeng.exe {7F8517F9-F96E-4AE6-B57E-E3CFC2D1B0FC} S-1-5-21-3551809350-4263495960-1443967649-1000:NNYJZAHP\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1976
- C:\Users\Admin\AppData\Roaming\conhost.exe
  C:\Users\Admin\AppData\Roaming\conhost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:340
- C:\Users\Admin\AppData\Roaming\conhost.exe
  C:\Users\Admin\AppData\Roaming\conhost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1312

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
ea00b027daaea8957a06b05a0ff6b855

SHA1
faa7d1b893ee93bbbe34043b478819250346e5da

SHA256
fa4a7337a7cfd56e6a978dd781e03d3192b4af779030894528821d351f93470c

SHA512
06c01c2d8f8875f7cd7124b5d128ca66ef0d17ffc885dfdbd7742f6d7f108bd0f90b12237ca2ec4e1dc476e574cb2de5f75453c4972bb67f2570c251d1745162

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

Filesize
75KB

MD5
a9fa87983b51d76f3a50af06c2cbb35b

SHA1
873cb3af6ebe410e2d3ff40ba7621be164503b1c

SHA256
b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb

SHA512
0db860c331f0b3c88f1cb64171bc464f28710be98dd1fa44ce61a44aa98f8ee82662010d9c3f8384d69868796152c2fe33c913ae1778df242248c230a58d7ae4

Download Submit
memory/340-37-0x0000000001230000-0x000000000124A000-memory.dmp

Filesize
104KB

Download
memory/1312-40-0x00000000012D0000-0x00000000012EA000-memory.dmp

Filesize
104KB

Download
memory/2096-22-0x000007FEF5EA3000-0x000007FEF5EA4000-memory.dmp

Filesize
4KB

Download
memory/2096-0-0x000007FEF5EA3000-0x000007FEF5EA4000-memory.dmp

Filesize
4KB

Download
memory/2096-33-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/2096-2-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/2096-1-0x0000000000900000-0x000000000091A000-memory.dmp

Filesize
104KB

Download
memory/2808-9-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/2808-8-0x000000001B510000-0x000000001B7F2000-memory.dmp

Filesize
2.9MB

Download
memory/2808-7-0x0000000002B30000-0x0000000002BB0000-memory.dmp

Filesize
512KB

Download
memory/2912-15-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

Filesize
2.9MB

Download
memory/2912-16-0x00000000021D0000-0x00000000021D8000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads