xworm | 0f06d9dfb9badfd337bd1dfb21f8b0ebb934e81072cddcef3d8466e526f2275b

General

Target

xdblake.exe
Size

66KB
MD5

bca20b0a6a3877b3bbedd6595e804164
SHA1

0bfd19a1dac3f937098aa005ff0b5aab2e767663
SHA256

0f06d9dfb9badfd337bd1dfb21f8b0ebb934e81072cddcef3d8466e526f2275b
SHA512

4932b511e0429f3a97b726483a87641d579a0d0d8f61c2771eb900baaffe36ea9ee2fba4e098fd922dc3c2aab8b0684483096ed9eb0de23cdc97f63ac449ac32
SSDEEP

1536:aefDEXUBdPPSuPr+hBcbDVnjXVQ6eK4ORonSLIF:aextSuPr4BcbpjFIK4O6nSsF

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

yet-assist.gl.at.ply.gg:63100

Attributes

Install_directory
%ProgramData%
install_file
$77wsappx.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2636-1-0x0000000000BB0000-0x0000000000BC6000-memory.dmp	family_xworm
behavioral1/files/0x000a000000018718-36.dat	family_xworm
behavioral1/memory/592-38-0x0000000001340000-0x0000000001356000-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
2980	powershell.exe
2860	powershell.exe
1904	powershell.exe
2488	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77wsappx.lnk	xdblake.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77wsappx.lnk	xdblake.exe

Executes dropped EXE 3 IoCs

pid	Process
592	$77wsappx.exe
1004	$77wsappx.exe
2964	$77wsappx.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-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\$77wsappx = "C:\\ProgramData\\$77wsappx.exe"	xdblake.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
1008	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2636	xdblake.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2980	powershell.exe
2860	powershell.exe
1904	powershell.exe
2488	powershell.exe
2636	xdblake.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2636	xdblake.exe
Token: SeDebugPrivilege	2980	powershell.exe
Token: SeDebugPrivilege	2860	powershell.exe
Token: SeDebugPrivilege	1904	powershell.exe
Token: SeDebugPrivilege	2488	powershell.exe
Token: SeDebugPrivilege	2636	xdblake.exe
Token: SeDebugPrivilege	592	$77wsappx.exe
Token: SeDebugPrivilege	1004	$77wsappx.exe
Token: SeDebugPrivilege	2964	$77wsappx.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2636	xdblake.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2636 wrote to memory of 2980	2636	xdblake.exe	32
PID 2636 wrote to memory of 2980	2636	xdblake.exe	32
PID 2636 wrote to memory of 2980	2636	xdblake.exe	32
PID 2636 wrote to memory of 2860	2636	xdblake.exe	34
PID 2636 wrote to memory of 2860	2636	xdblake.exe	34
PID 2636 wrote to memory of 2860	2636	xdblake.exe	34
PID 2636 wrote to memory of 1904	2636	xdblake.exe	36
PID 2636 wrote to memory of 1904	2636	xdblake.exe	36
PID 2636 wrote to memory of 1904	2636	xdblake.exe	36
PID 2636 wrote to memory of 2488	2636	xdblake.exe	38
PID 2636 wrote to memory of 2488	2636	xdblake.exe	38
PID 2636 wrote to memory of 2488	2636	xdblake.exe	38
PID 2636 wrote to memory of 1008	2636	xdblake.exe	40
PID 2636 wrote to memory of 1008	2636	xdblake.exe	40
PID 2636 wrote to memory of 1008	2636	xdblake.exe	40
PID 1864 wrote to memory of 592	1864	taskeng.exe	43
PID 1864 wrote to memory of 592	1864	taskeng.exe	43
PID 1864 wrote to memory of 592	1864	taskeng.exe	43
PID 1864 wrote to memory of 1004	1864	taskeng.exe	44
PID 1864 wrote to memory of 1004	1864	taskeng.exe	44
PID 1864 wrote to memory of 1004	1864	taskeng.exe	44
PID 1864 wrote to memory of 2964	1864	taskeng.exe	45
PID 1864 wrote to memory of 2964	1864	taskeng.exe	45
PID 1864 wrote to memory of 2964	1864	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\xdblake.exe
"C:\Users\Admin\AppData\Local\Temp\xdblake.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2636
- 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\xdblake.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2980
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'xdblake.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2860
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\$77wsappx.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1904
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '$77wsappx.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2488
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "$77wsappx" /tr "C:\ProgramData\$77wsappx.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1008

C:\Windows\system32\taskeng.exe
taskeng.exe {C2540C96-4FFF-42A2-B4E3-A0FB8EE2BD67} S-1-5-21-2039016743-699959520-214465309-1000:PIDEURYY\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1864
- C:\ProgramData\$77wsappx.exe
  C:\ProgramData\$77wsappx.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:592
- C:\ProgramData\$77wsappx.exe
  C:\ProgramData\$77wsappx.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1004
- C:\ProgramData\$77wsappx.exe
  C:\ProgramData\$77wsappx.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2964

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\ProgramData\$77wsappx.exe

Filesize
66KB

MD5
bca20b0a6a3877b3bbedd6595e804164

SHA1
0bfd19a1dac3f937098aa005ff0b5aab2e767663

SHA256
0f06d9dfb9badfd337bd1dfb21f8b0ebb934e81072cddcef3d8466e526f2275b

SHA512
4932b511e0429f3a97b726483a87641d579a0d0d8f61c2771eb900baaffe36ea9ee2fba4e098fd922dc3c2aab8b0684483096ed9eb0de23cdc97f63ac449ac32

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

Filesize
7KB

MD5
8ceb0c79600cbcb7a7d75e65e32b1396

SHA1
1fe1abe4cfb2eb21bba1883ce8f6f315bfc6bc24

SHA256
dfcba4d265908f01a96d32e6393ffc7f1eff111425fea448f9409da8a8f4ab97

SHA512
409fd71d521ad9cb977ed02d4fc85bec753c6bf0cec1dd61201df06960c0ed7bf3022b6c2fe75cba5dbb21ec6a2a129910da8f9123d1c0cd4d83876b5a7e087c

Download Submit
memory/592-38-0x0000000001340000-0x0000000001356000-memory.dmp

Filesize
88KB

Download
memory/2636-34-0x000007FEF5FA0000-0x000007FEF698C000-memory.dmp

Filesize
9.9MB

Download
memory/2636-1-0x0000000000BB0000-0x0000000000BC6000-memory.dmp

Filesize
88KB

Download
memory/2636-2-0x000007FEF5FA0000-0x000007FEF698C000-memory.dmp

Filesize
9.9MB

Download
memory/2636-0-0x000007FEF5FA3000-0x000007FEF5FA4000-memory.dmp

Filesize
4KB

Download
memory/2636-7-0x000007FEF5FA3000-0x000007FEF5FA4000-memory.dmp

Filesize
4KB

Download
memory/2860-16-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/2860-17-0x0000000001E20000-0x0000000001E28000-memory.dmp

Filesize
32KB

Download
memory/2980-8-0x0000000002B80000-0x0000000002C00000-memory.dmp

Filesize
512KB

Download
memory/2980-10-0x0000000002860000-0x0000000002868000-memory.dmp

Filesize
32KB

Download
memory/2980-9-0x000000001B720000-0x000000001BA02000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads