General

  • Target

    1aac0226a0d55102bf3c84eaa49de03a.bin

  • Size

    684KB

  • Sample

    230316-g9818abf91

  • MD5

    4eda0475e83938652e4f268d3b452ab1

  • SHA1

    a0efbb1f2511e22a855c77ef1748c7e05c388077

  • SHA256

    51c31b5b75349edf7575c420d7c243eedc5fe451a650391f9bb5c30bfb39da98

  • SHA512

    b826cc6587bc390e74f7adcf92c61b9ae755df97d9ed6487d14cbe63645572b914e480b239695ad2a1b59e030b7fbf319f5abbc70e57b748523d8e37eb862308

  • SSDEEP

    12288:DcELXDLxQwfVnvqD9sN8USEW16kGY8VoVyoq91LXDkoVCcHuqe9KvXqx:YoT9Q8oRS8UZWxGSyoq91LXDko5O1KPw

Malware Config

Extracted

Family

cryptbot

C2

http://ernblt32.top/gate.php

Attributes
  • payload_url

    http:

Targets

    • Target

      e1c77078463da33af7cfe8ddd17942773df369903b5b92cd92c090fc5749e17d.exe

    • Size

      791KB

    • MD5

      1aac0226a0d55102bf3c84eaa49de03a

    • SHA1

      717b745bb437ac0cfd57a4f64fdb576ec0987166

    • SHA256

      e1c77078463da33af7cfe8ddd17942773df369903b5b92cd92c090fc5749e17d

    • SHA512

      a4a0aa6393d278abec397cd532232e93da6c8bd13679e38d94adea9e0ebcc803cecc7bf93552f32de5cad127709380e67583be4b788b6026b5306bdfdf645eae

    • SSDEEP

      12288:hmshgxF9wR04Uu6xhjlNLuNs9KEzmOpru+OSwOAjUkNZ6Zui3tuC3eUqaIQCDuH:XhOF2RO/XX9HyOdYbZ6ZeZcC6H

    • CryptBot

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

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Deletes itself

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • 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.

    • Checks whether UAC is enabled

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

6
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

6
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

2
T1005

Tasks