Resubmissions

24-09-2021 14:18

210924-rmb33shbfl 10

23-09-2021 13:46

210923-q2y1qaedfr 10

17-09-2021 17:02

210917-vj9fysgab6 10

Analysis

  • max time kernel
    151s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    23-09-2021 13:46

General

  • Target

    9bbd49dbf0098e342cbb8935f8f40c92a395d45c04ef00f5df08b6953e30ca9e.exe

  • Size

    360KB

  • MD5

    6e223f8e362245614a74d9865d0817b0

  • SHA1

    dd8d9ea9d62bcf6a7e69bbf6dd81457103bcc29e

  • SHA256

    9bbd49dbf0098e342cbb8935f8f40c92a395d45c04ef00f5df08b6953e30ca9e

  • SHA512

    36321cbe8c9b17a939241247baa27e204f51c2f8c8667cafd3ddd939159412ead8addf663b2285499396917f1bebe51cc9f1ec7c218645f877860010da5c4e1a

Malware Config

Extracted

Family

webmonitor

C2

restrep0.wm01.to:443

Attributes
  • config_key

    rmGRTTf00SgxCRDiG5pe71nlU5TxVucQ

  • private_key

    7geUgzWms

  • url_path

    /recv4.php

Signatures

  • RevcodeRat, WebMonitorRat

    WebMonitor is a remote access tool that you can use from any browser access to control, and monitor your phones, or PCs.

  • WebMonitor Payload 1 IoCs
  • suricata: ET MALWARE WebMonitor/RevCode RAT CnC Domain in DNS Lookup

    suricata: ET MALWARE WebMonitor/RevCode RAT CnC Domain in DNS Lookup

  • Executes dropped EXE 1 IoCs
  • UPX packed file 2 IoCs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9bbd49dbf0098e342cbb8935f8f40c92a395d45c04ef00f5df08b6953e30ca9e.exe
    "C:\Users\Admin\AppData\Local\Temp\9bbd49dbf0098e342cbb8935f8f40c92a395d45c04ef00f5df08b6953e30ca9e.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2208
    • C:\Users\Admin\AppData\Local\Temp\9bbd49dbf0098e342cbb8935f8f40c92a395d45c04ef00f5df08b6953e30ca9e.exe
      "C:\Users\Admin\AppData\Local\Temp\9bbd49dbf0098e342cbb8935f8f40c92a395d45c04ef00f5df08b6953e30ca9e.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: RenamesItself
      PID:2492

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\9bbd49dbf0098e342cbb8935f8f40c92a395d45c04ef00f5df08b6953e30ca9e.exe

    MD5

    6e223f8e362245614a74d9865d0817b0

    SHA1

    dd8d9ea9d62bcf6a7e69bbf6dd81457103bcc29e

    SHA256

    9bbd49dbf0098e342cbb8935f8f40c92a395d45c04ef00f5df08b6953e30ca9e

    SHA512

    36321cbe8c9b17a939241247baa27e204f51c2f8c8667cafd3ddd939159412ead8addf663b2285499396917f1bebe51cc9f1ec7c218645f877860010da5c4e1a

  • memory/2208-115-0x0000000000CC0000-0x0000000000CC1000-memory.dmp

    Filesize

    4KB

  • memory/2208-117-0x0000000005AC0000-0x0000000005AC1000-memory.dmp

    Filesize

    4KB

  • memory/2208-118-0x0000000002F60000-0x0000000002F62000-memory.dmp

    Filesize

    8KB

  • memory/2208-122-0x00000000055C0000-0x0000000005ABE000-memory.dmp

    Filesize

    5.0MB

  • memory/2492-119-0x0000000000400000-0x00000000004C0000-memory.dmp

    Filesize

    768KB

  • memory/2492-120-0x00000000004BE2B0-mapping.dmp

  • memory/2492-123-0x0000000000400000-0x00000000004C0000-memory.dmp

    Filesize

    768KB