General

  • Target

    ec36989321fb62bb857a24a53d1491fd.exe

  • Size

    694KB

  • Sample

    210715-hm11l7wxv2

  • MD5

    ec36989321fb62bb857a24a53d1491fd

  • SHA1

    28de531b6da8f80b0452c109dcf30bc1efee23f9

  • SHA256

    eb4e54c1372f7002b2b49a9918e67f84d65e52f1b12c5b7313420a48d5305e41

  • SHA512

    e71009f296d2b9cb07c6a30fe0798db527aa756177478116b53067e8b55ae17d2ebdb7b4ecb9587fe052d424fa643e9bf3ecd0821d613a0545f8546702c722b7

Malware Config

Extracted

Family

cryptbot

C2

wymbdu42.top

morkus04.top

Attributes
  • payload_url

    http://hofiwb05.top/download.php?file=lv.exe

Targets

    • Target

      ec36989321fb62bb857a24a53d1491fd.exe

    • Size

      694KB

    • MD5

      ec36989321fb62bb857a24a53d1491fd

    • SHA1

      28de531b6da8f80b0452c109dcf30bc1efee23f9

    • SHA256

      eb4e54c1372f7002b2b49a9918e67f84d65e52f1b12c5b7313420a48d5305e41

    • SHA512

      e71009f296d2b9cb07c6a30fe0798db527aa756177478116b53067e8b55ae17d2ebdb7b4ecb9587fe052d424fa643e9bf3ecd0821d613a0545f8546702c722b7

    • CryptBot

      A C++ stealer distributed widely in bundle with other software.

    • CryptBot Payload

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Drops startup file

    • Loads dropped DLL

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of web browsers

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

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

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

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Remote System Discovery

1
T1018

Collection

Data from Local System

3
T1005

Command and Control

Web Service

1
T1102

Tasks