General

  • Target

    Vapev41.exe

  • Size

    36.0MB

  • Sample

    240420-k6zj6adc25

  • MD5

    feb087808958828564c3f63115056652

  • SHA1

    aa7da658d1720bb04c4f48bd48c96c2b203007b6

  • SHA256

    7db2f1b8447c7724e0b312fb2a9cc177807d72d44cec68e12aef49b3990b1c29

  • SHA512

    82e2ee2059895539b7407f5f16cd8dc278cfa334e7774e819544e0f5cd00002910a1dfd745a89c6a22dd683d04fe2ac45f82587fdb11d1efddb1c6bff2855ea5

  • SSDEEP

    786432:s8AkL7W5cIaalagScIwxMSLu2gTLXVsSibQpOXD/4VxZrJczq:s8AkLA5xScILSLu2qVcbQpOXsnzc

Malware Config

Extracted

Family

xworm

C2

185.216.70.22:7000

127.0.0.1:7000

185.239.237.162:7000

Attributes
  • Install_directory

    %AppData%

  • install_file

    GoogleUpdateCore.exe

Targets

    • Target

      Vapev41.exe

    • Size

      36.0MB

    • MD5

      feb087808958828564c3f63115056652

    • SHA1

      aa7da658d1720bb04c4f48bd48c96c2b203007b6

    • SHA256

      7db2f1b8447c7724e0b312fb2a9cc177807d72d44cec68e12aef49b3990b1c29

    • SHA512

      82e2ee2059895539b7407f5f16cd8dc278cfa334e7774e819544e0f5cd00002910a1dfd745a89c6a22dd683d04fe2ac45f82587fdb11d1efddb1c6bff2855ea5

    • SSDEEP

      786432:s8AkL7W5cIaalagScIwxMSLu2gTLXVsSibQpOXD/4VxZrJczq:s8AkLA5xScILSLu2qVcbQpOXsnzc

    • Deletes Windows Defender Definitions

      Uses mpcmdrun utility to delete all AV definitions.

    • Detect Xworm Payload

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Blocklisted process makes network request

    • Drops file in Drivers directory

    • Stops running service(s)

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Execution

Command and Scripting Interpreter

1
T1059

Scheduled Task/Job

1
T1053

Persistence

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Impair Defenses

2
T1562

File and Directory Permissions Modification

1
T1222

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

2
T1552

Credentials In Files

2
T1552.001

Discovery

Query Registry

2
T1012

System Information Discovery

4
T1082

Process Discovery

1
T1057

Remote System Discovery

1
T1018

Collection

Data from Local System

2
T1005

Impact

Service Stop

1
T1489

Tasks