xworm | e37402a9a7192a5c341e38c64713b0f4bf963f44f0d2003a656ed64ef3fd1c00

General

Target

xdbabykai.exe
Size

66KB
MD5

574f80e11cd6dbbf20ed6fc1d5ebf986
SHA1

c8cc32715ba8297c7a144423dd147e8f8375baee
SHA256

e37402a9a7192a5c341e38c64713b0f4bf963f44f0d2003a656ed64ef3fd1c00
SHA512

6b40cb751ad6c755461f8959272123224efb5b4245af722c40972d3b333cdd68bda718a32dfd462b1952f1b945f75dc483bd082d2dc0da406affec9fa0bd88a6
SSDEEP

768:Lqpemdo3SEMO3v2hAHWkQiLYEbLf5KSvs+HWK1Pew60J/pOK573ghDJZ04hq:Ll1PM1iHWi5bL4S01Kdb62pOCgl7Pq

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:9999

Attributes

Install_directory
%ProgramData%
install_file
$77wsappx.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2580-1-0x00000000010A0000-0x00000000010B6000-memory.dmp	family_xworm
behavioral1/files/0x000b000000012238-34.dat	family_xworm
behavioral1/memory/1232-36-0x0000000001210000-0x0000000001226000-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
2744	powershell.exe
2064	powershell.exe
2836	powershell.exe
2868	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
1232	$77wsappx.exe
2408	$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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\$77wsappx = "C:\\ProgramData\\$77wsappx.exe"	xdbabykai.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
1444	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2580	xdbabykai.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2836	powershell.exe
2868	powershell.exe
2744	powershell.exe
2064	powershell.exe
2580	xdbabykai.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2580	xdbabykai.exe
Token: SeDebugPrivilege	2836	powershell.exe
Token: SeDebugPrivilege	2868	powershell.exe
Token: SeDebugPrivilege	2744	powershell.exe
Token: SeDebugPrivilege	2064	powershell.exe
Token: SeDebugPrivilege	2580	xdbabykai.exe
Token: SeDebugPrivilege	1232	$77wsappx.exe
Token: SeDebugPrivilege	2408	$77wsappx.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2580	xdbabykai.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2580 wrote to memory of 2836	2580	xdbabykai.exe	30
PID 2580 wrote to memory of 2836	2580	xdbabykai.exe	30
PID 2580 wrote to memory of 2836	2580	xdbabykai.exe	30
PID 2580 wrote to memory of 2868	2580	xdbabykai.exe	32
PID 2580 wrote to memory of 2868	2580	xdbabykai.exe	32
PID 2580 wrote to memory of 2868	2580	xdbabykai.exe	32
PID 2580 wrote to memory of 2744	2580	xdbabykai.exe	34
PID 2580 wrote to memory of 2744	2580	xdbabykai.exe	34
PID 2580 wrote to memory of 2744	2580	xdbabykai.exe	34
PID 2580 wrote to memory of 2064	2580	xdbabykai.exe	36
PID 2580 wrote to memory of 2064	2580	xdbabykai.exe	36
PID 2580 wrote to memory of 2064	2580	xdbabykai.exe	36
PID 2580 wrote to memory of 1444	2580	xdbabykai.exe	38
PID 2580 wrote to memory of 1444	2580	xdbabykai.exe	38
PID 2580 wrote to memory of 1444	2580	xdbabykai.exe	38
PID 2372 wrote to memory of 1232	2372	taskeng.exe	41
PID 2372 wrote to memory of 1232	2372	taskeng.exe	41
PID 2372 wrote to memory of 1232	2372	taskeng.exe	41
PID 2372 wrote to memory of 2408	2372	taskeng.exe	42
PID 2372 wrote to memory of 2408	2372	taskeng.exe	42
PID 2372 wrote to memory of 2408	2372	taskeng.exe	42

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\xdbabykai.exe
"C:\Users\Admin\AppData\Local\Temp\xdbabykai.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:2580
- 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\xdbabykai.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2836
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'xdbabykai.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2868
- 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:2744
- 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:2064
- 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:1444

C:\Windows\system32\taskeng.exe
taskeng.exe {2032311C-50AF-4E3E-8E20-51E8E1473BBC} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2372
- C:\ProgramData\$77wsappx.exe
  C:\ProgramData\$77wsappx.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1232
- C:\ProgramData\$77wsappx.exe
  C:\ProgramData\$77wsappx.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2408

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:\ProgramData\$77wsappx.exe

Filesize
66KB

MD5
574f80e11cd6dbbf20ed6fc1d5ebf986

SHA1
c8cc32715ba8297c7a144423dd147e8f8375baee

SHA256
e37402a9a7192a5c341e38c64713b0f4bf963f44f0d2003a656ed64ef3fd1c00

SHA512
6b40cb751ad6c755461f8959272123224efb5b4245af722c40972d3b333cdd68bda718a32dfd462b1952f1b945f75dc483bd082d2dc0da406affec9fa0bd88a6

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

Filesize
7KB

MD5
435d9fde62040aea00ec7efbbc7f293d

SHA1
2186755d42b90bd769ddaab69eb8345ae8264d62

SHA256
160b09a89a56f7af75b2ad16e2b2f8b87ec7826fb07fefd61a73516dcdf4d4b7

SHA512
2541e11c09f7d9eeb7c8c8ec866375d2b0e325a60706e53510ecd9ea272bd7ed22a668034033622406e947f950182ca27b38728cab1ac0422e600baf48da2f17

Download Submit
memory/1232-36-0x0000000001210000-0x0000000001226000-memory.dmp

Filesize
88KB

Download
memory/2580-3-0x000007FEF6253000-0x000007FEF6254000-memory.dmp

Filesize
4KB

Download
memory/2580-27-0x000007FEF6250000-0x000007FEF6C3C000-memory.dmp

Filesize
9.9MB

Download
memory/2580-0-0x000007FEF6253000-0x000007FEF6254000-memory.dmp

Filesize
4KB

Download
memory/2580-2-0x000007FEF6250000-0x000007FEF6C3C000-memory.dmp

Filesize
9.9MB

Download
memory/2580-1-0x00000000010A0000-0x00000000010B6000-memory.dmp

Filesize
88KB

Download
memory/2836-9-0x0000000002550000-0x0000000002558000-memory.dmp

Filesize
32KB

Download
memory/2836-8-0x000000001B1B0000-0x000000001B492000-memory.dmp

Filesize
2.9MB

Download
memory/2868-15-0x000000001B1F0000-0x000000001B4D2000-memory.dmp

Filesize
2.9MB

Download
memory/2868-16-0x0000000001F40000-0x0000000001F48000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads