General

  • Target

    d2d8470a451c5d183f4e337417397fca0c75e00e51f9ddfffbbaf9b2f675edc1

  • Size

    638KB

  • Sample

    220520-rt67ssbdbp

  • MD5

    740ae2984b6dcab569df5530f6f52b82

  • SHA1

    6bf2be703b8bd4cd244533fe44bf20632fe3a2d7

  • SHA256

    d2d8470a451c5d183f4e337417397fca0c75e00e51f9ddfffbbaf9b2f675edc1

  • SHA512

    62ce4c2514f3a0c0a91d1204bdfa9872a902c9e045f92bf44c8517649d44af0e217ff9b168bc2c63dd088fb9fe43145694e7d3d2188d10dd12aab07c1fdb008f

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.salsabile.com
  • Port:
    587
  • Username:
    recep.mag.mp@salsabile.com
  • Password:
    @SALSA@2015

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.salsabile.com
  • Port:
    587
  • Username:
    recep.mag.mp@salsabile.com
  • Password:
    @SALSA@2015

Targets

    • Target

      Fa-200000345.exe

    • Size

      974KB

    • MD5

      7789215ed9d6d730fb242791151786ea

    • SHA1

      a911fb8e9f323561f202f58cb26f177a5b7eef72

    • SHA256

      13c555d2bc29bc384b7c496c0aefadfbe38d7b415e11c43bdbcfdf702062d1f3

    • SHA512

      b49cbc134c1e612b7e861e2528ea282980b9cb9a8d109cb3f9ce37b94e76565874da3d19ae88f92be2f917889909feaddad925193f69743564a6f18648586905

    • AgentTesla

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

    • UAC bypass

    • Windows security bypass

    • XpertRAT

      XpertRAT is a remote access trojan with various capabilities.

    • AgentTesla Payload

    • Adds policy Run key to start application

    • Executes dropped EXE

    • Checks computer location settings

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

    • 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 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.

    • Windows security modification

    • Accesses Microsoft Outlook profiles

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

2
T1060

Privilege Escalation

Bypass User Account Control

1
T1088

Defense Evasion

Bypass User Account Control

1
T1088

Disabling Security Tools

3
T1089

Modify Registry

6
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks