General

  • Target

    Order1040258.xlsm

  • Size

    431KB

  • Sample

    220630-ta2jbaccgp

  • MD5

    a7a4f3a4aa943e3bd5e78789cec486d6

  • SHA1

    6bc828610e03758ea7121983b9e281b8e8b6fb47

  • SHA256

    7933ad4edab82e52f977bc9623aa7b24f63ac959efbf1cd5c8ecf73a4207b9c1

  • SHA512

    863820cc0e7cabbf18653ebda72bc2357624257f29f886a3f06c8fec4a53cf0f309117467c92a7da929d51d01f3eed1dac328301621224ed8cf28807afa92445

Malware Config

Extracted

Family

agenttesla

C2

http://136.144.41.76/bray/inc/a4a9ffb236214a.php

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

127.0.0.1:1111

62.197.136.167:6606

62.197.136.167:7707

62.197.136.167:8808

62.197.136.167:1111

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Targets

    • Target

      Order1040258.xlsm

    • Size

      431KB

    • MD5

      a7a4f3a4aa943e3bd5e78789cec486d6

    • SHA1

      6bc828610e03758ea7121983b9e281b8e8b6fb47

    • SHA256

      7933ad4edab82e52f977bc9623aa7b24f63ac959efbf1cd5c8ecf73a4207b9c1

    • SHA512

      863820cc0e7cabbf18653ebda72bc2357624257f29f886a3f06c8fec4a53cf0f309117467c92a7da929d51d01f3eed1dac328301621224ed8cf28807afa92445

    • AgentTesla

      Agent Tesla is a remote access tool (RAT) written in visual basic.

    • AsyncRat

      AsyncRAT is designed to remotely monitor and control other computers.

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • suricata: ET MALWARE AgentTesla Communicating with CnC Server

      suricata: ET MALWARE AgentTesla Communicating with CnC Server

    • suricata: ET MALWARE Generic AsyncRAT Style SSL Cert

      suricata: ET MALWARE Generic AsyncRAT Style SSL Cert

    • suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)

      suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)

    • Async RAT payload

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Checks computer location settings

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

    • Loads dropped DLL

    • Accesses Microsoft Outlook profiles

    • Adds Run key to start application

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

2
T1112

Discovery

Query Registry

3
T1012

System Information Discovery

4
T1082

Collection

Email Collection

1
T1114

Tasks