General

  • Target

    a98a9ee375a2143051dd55e2b3b891f088f20763b7f446b506f52178b28ed94a

  • Size

    522KB

  • Sample

    220521-ctn9naheem

  • MD5

    d2314bff490d1fe82bcfa9ccb14feaf6

  • SHA1

    9b6b5e5dfcb12b946cb4a596ecd3d11187295e0c

  • SHA256

    a98a9ee375a2143051dd55e2b3b891f088f20763b7f446b506f52178b28ed94a

  • SHA512

    237eba1d56f48d7fa83407521916a99cfdbf5365e9c2a66fed121e1a27882ff43177ecf7a37aa4c4ccaf9317f46312eb699b9c0517a13add1034f8a630be4c72

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.kanzen.com.my
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    YELee@1919

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.kanzen.com.my
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    YELee@1919

Targets

    • Target

      P-O 632020.exe

    • Size

      732KB

    • MD5

      822be5b478bb8f850e41e9ff861ba07d

    • SHA1

      78c496a00fc572a106d933474415b41b67daf982

    • SHA256

      d149b8b19b0a2841e483fb8e2671390b2073bba721dad0f24eeb0fbc23f4c954

    • SHA512

      c5b8d87fc542ebe97ea1e29a42cd1b0c4d953016e578e384cbe707d0936226cc4842cbd736a06c85ec602fd4664d4c5b2d73baef7830bfd0d88247463c37acf7

    • AgentTesla

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

    • suricata: ET MALWARE AgentTesla Exfil Via SMTP

      suricata: ET MALWARE AgentTesla Exfil Via SMTP

    • AgentTesla Payload

    • Looks for VirtualBox Guest Additions in registry

    • ReZer0 packer

      Detects ReZer0, a packer with multiple versions used in various campaigns.

    • Looks for VMWare Tools registry key

    • 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.

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

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

    • Accesses Microsoft Outlook profiles

    • Adds Run key to start application

    • Maps connected drives based on registry

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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

5
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

4
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks