xworm | 10db45b88db5377749bce89b2fe511917e38d027e539ac652ea79829fb82985d

General

Target

Bloxstrap 2.5.4.exe
Size

66KB
MD5

0680a239ba405c1935c687ebdf6d4540
SHA1

bf2cc8de357fe1af9888e120e1c139ca2bc77c15
SHA256

10db45b88db5377749bce89b2fe511917e38d027e539ac652ea79829fb82985d
SHA512

09ff2d0449404f7b704cb8270ceecfc87d84c42c202a55ce20fb425230d81f5bf8a798c1c52a2a1ed19c599ad8d2f72188c561d734dd79ac70b7973fbd07fc73
SSDEEP

1536:44Sw2KfDxiZcy2fdbdFSQ37E6vObaKjG:4OL1yGdbdF5ZObPG

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

medical-m.gl.at.ply.gg:28857

Attributes

Install_directory
%ProgramData%
install_file
Runtime Broker.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/2280-1-0x0000000000300000-0x0000000000316000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
3000	powershell.exe
2196	powershell.exe
2580	powershell.exe
2516	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Runtime Broker.lnk	Bloxstrap 2.5.4.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Runtime Broker.lnk	Bloxstrap 2.5.4.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-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\Runtime Broker = "C:\\ProgramData\\Runtime Broker.exe"	Bloxstrap 2.5.4.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
2040	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2196	powershell.exe
2580	powershell.exe
2516	powershell.exe
3000	powershell.exe
2280	Bloxstrap 2.5.4.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2280	Bloxstrap 2.5.4.exe
Token: SeDebugPrivilege	2196	powershell.exe
Token: SeDebugPrivilege	2580	powershell.exe
Token: SeDebugPrivilege	2516	powershell.exe
Token: SeDebugPrivilege	3000	powershell.exe
Token: SeDebugPrivilege	2280	Bloxstrap 2.5.4.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2280	Bloxstrap 2.5.4.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 2196	2280	Bloxstrap 2.5.4.exe	29
PID 2280 wrote to memory of 2196	2280	Bloxstrap 2.5.4.exe	29
PID 2280 wrote to memory of 2196	2280	Bloxstrap 2.5.4.exe	29
PID 2280 wrote to memory of 2580	2280	Bloxstrap 2.5.4.exe	31
PID 2280 wrote to memory of 2580	2280	Bloxstrap 2.5.4.exe	31
PID 2280 wrote to memory of 2580	2280	Bloxstrap 2.5.4.exe	31
PID 2280 wrote to memory of 2516	2280	Bloxstrap 2.5.4.exe	33
PID 2280 wrote to memory of 2516	2280	Bloxstrap 2.5.4.exe	33
PID 2280 wrote to memory of 2516	2280	Bloxstrap 2.5.4.exe	33
PID 2280 wrote to memory of 3000	2280	Bloxstrap 2.5.4.exe	35
PID 2280 wrote to memory of 3000	2280	Bloxstrap 2.5.4.exe	35
PID 2280 wrote to memory of 3000	2280	Bloxstrap 2.5.4.exe	35
PID 2280 wrote to memory of 2040	2280	Bloxstrap 2.5.4.exe	37
PID 2280 wrote to memory of 2040	2280	Bloxstrap 2.5.4.exe	37
PID 2280 wrote to memory of 2040	2280	Bloxstrap 2.5.4.exe	37

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\Bloxstrap 2.5.4.exe
"C:\Users\Admin\AppData\Local\Temp\Bloxstrap 2.5.4.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:2280
- 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\Bloxstrap 2.5.4.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2196
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Bloxstrap 2.5.4.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2580
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\Runtime Broker.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2516
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Runtime Broker.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3000
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Runtime Broker" /tr "C:\ProgramData\Runtime Broker.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2040

C:\Windows\system32\taskeng.exe
taskeng.exe {2F372C07-91FD-47C4-A492-2131BAED0916} S-1-5-21-1298544033-3225604241-2703760938-1000:IZKCKOTP\Admin:Interactive:[1]
1⤵
PID:856

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
e59a420e16323fd0f183e3aa3525b858

SHA1
d56e07fb398323fa51d84667398efccb2f055274

SHA256
e903d24d6be8655dbf88bed4d8f9a4723deae6b0e1c8bf825143b9fd76c1f575

SHA512
5ad43fa1e02aebfff016d914c1798237267927265d6e9212c5a5a4a7cd96c5d274881a9b30770a9c7bc21a02d1a306f1a06f98df2c809cf6b2e04039dbb361f7

Download Submit
memory/2196-7-0x0000000002E90000-0x0000000002F10000-memory.dmp

Filesize
512KB

Download
memory/2196-8-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

Filesize
2.9MB

Download
memory/2196-9-0x0000000001F50000-0x0000000001F58000-memory.dmp

Filesize
32KB

Download
memory/2280-0-0x000007FEF5A53000-0x000007FEF5A54000-memory.dmp

Filesize
4KB

Download
memory/2280-1-0x0000000000300000-0x0000000000316000-memory.dmp

Filesize
88KB

Download
memory/2280-2-0x000007FEF5A50000-0x000007FEF643C000-memory.dmp

Filesize
9.9MB

Download
memory/2280-31-0x000007FEF5A53000-0x000007FEF5A54000-memory.dmp

Filesize
4KB

Download
memory/2280-32-0x000007FEF5A50000-0x000007FEF643C000-memory.dmp

Filesize
9.9MB

Download
memory/2580-15-0x000000001B660000-0x000000001B942000-memory.dmp

Filesize
2.9MB

Download
memory/2580-16-0x0000000002390000-0x0000000002398000-memory.dmp

Filesize
32KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads