Analysis

  • max time kernel
    142s
  • max time network
    13s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    22-01-2021 11:35

General

  • Target

    ba0f71fb8d0bc64a55644f7086fe2e03d78dab544f9998658eca5ebd2c48be76.exe

  • Size

    1.1MB

  • MD5

    92edc65726762623172b37e177bd09de

  • SHA1

    8a75db87fb9a1cfc0c8dc24d42dcba490919c954

  • SHA256

    ba0f71fb8d0bc64a55644f7086fe2e03d78dab544f9998658eca5ebd2c48be76

  • SHA512

    2aa1496d3e192d14efece08c9477f3dd4e69a70af84ac9744cbd9559a57f1dbdb6e67c9ad32fb35e3d147833a5eaee0fb84e3368bd50715b4f67e8aeffa63b63

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.com
  • Port:
    587
  • Username:
    vbjmys@yandex.com
  • Password:
    officepost8

Signatures

  • AgentTesla

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

  • AgentTesla Payload 3 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 3 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

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

  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ba0f71fb8d0bc64a55644f7086fe2e03d78dab544f9998658eca5ebd2c48be76.exe
    "C:\Users\Admin\AppData\Local\Temp\ba0f71fb8d0bc64a55644f7086fe2e03d78dab544f9998658eca5ebd2c48be76.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1056
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /c REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "pls" /t REG_SZ /d "C:\Program Files (x86)\sshhhaaa.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:316
      • C:\Windows\SysWOW64\reg.exe
        REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "pls" /t REG_SZ /d "C:\Program Files (x86)\sshhhaaa.exe"
        3⤵
        • Adds Run key to start application
        PID:1668
    • C:\Program Files (x86)\sshhhaaa.exe
      "C:\Program Files (x86)\sshhhaaa.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:748
      • C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
        "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1756

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

3
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Program Files (x86)\sshhhaaa.exe
    MD5

    92edc65726762623172b37e177bd09de

    SHA1

    8a75db87fb9a1cfc0c8dc24d42dcba490919c954

    SHA256

    ba0f71fb8d0bc64a55644f7086fe2e03d78dab544f9998658eca5ebd2c48be76

    SHA512

    2aa1496d3e192d14efece08c9477f3dd4e69a70af84ac9744cbd9559a57f1dbdb6e67c9ad32fb35e3d147833a5eaee0fb84e3368bd50715b4f67e8aeffa63b63

  • C:\Program Files (x86)\sshhhaaa.exe
    MD5

    92edc65726762623172b37e177bd09de

    SHA1

    8a75db87fb9a1cfc0c8dc24d42dcba490919c954

    SHA256

    ba0f71fb8d0bc64a55644f7086fe2e03d78dab544f9998658eca5ebd2c48be76

    SHA512

    2aa1496d3e192d14efece08c9477f3dd4e69a70af84ac9744cbd9559a57f1dbdb6e67c9ad32fb35e3d147833a5eaee0fb84e3368bd50715b4f67e8aeffa63b63

  • C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
    MD5

    b58b926c3574d28d5b7fdd2ca3ec30d5

    SHA1

    d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

    SHA256

    6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

    SHA512

    b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

  • C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
    MD5

    b58b926c3574d28d5b7fdd2ca3ec30d5

    SHA1

    d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

    SHA256

    6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

    SHA512

    b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

  • \Program Files (x86)\sshhhaaa.exe
    MD5

    92edc65726762623172b37e177bd09de

    SHA1

    8a75db87fb9a1cfc0c8dc24d42dcba490919c954

    SHA256

    ba0f71fb8d0bc64a55644f7086fe2e03d78dab544f9998658eca5ebd2c48be76

    SHA512

    2aa1496d3e192d14efece08c9477f3dd4e69a70af84ac9744cbd9559a57f1dbdb6e67c9ad32fb35e3d147833a5eaee0fb84e3368bd50715b4f67e8aeffa63b63

  • \Users\Admin\AppData\Local\Temp\RegAsm.exe
    MD5

    b58b926c3574d28d5b7fdd2ca3ec30d5

    SHA1

    d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

    SHA256

    6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

    SHA512

    b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

  • \Users\Admin\AppData\Local\Temp\RegAsm.exe
    MD5

    b58b926c3574d28d5b7fdd2ca3ec30d5

    SHA1

    d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

    SHA256

    6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

    SHA512

    b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

  • memory/316-8-0x0000000000000000-mapping.dmp
  • memory/748-21-0x00000000005B0000-0x00000000005BB000-memory.dmp
    Filesize

    44KB

  • memory/748-22-0x0000000000850000-0x0000000000851000-memory.dmp
    Filesize

    4KB

  • memory/748-25-0x0000000004BB1000-0x0000000004BB2000-memory.dmp
    Filesize

    4KB

  • memory/748-12-0x0000000000000000-mapping.dmp
  • memory/748-15-0x0000000073C60000-0x000000007434E000-memory.dmp
    Filesize

    6.9MB

  • memory/748-16-0x0000000000F50000-0x0000000000F51000-memory.dmp
    Filesize

    4KB

  • memory/748-20-0x0000000004BB0000-0x0000000004BB1000-memory.dmp
    Filesize

    4KB

  • memory/1056-10-0x0000000000D91000-0x0000000000D92000-memory.dmp
    Filesize

    4KB

  • memory/1056-2-0x0000000073C60000-0x000000007434E000-memory.dmp
    Filesize

    6.9MB

  • memory/1056-7-0x0000000000D90000-0x0000000000D91000-memory.dmp
    Filesize

    4KB

  • memory/1056-6-0x00000000004A0000-0x00000000004A1000-memory.dmp
    Filesize

    4KB

  • memory/1056-5-0x00000000002F0000-0x000000000030E000-memory.dmp
    Filesize

    120KB

  • memory/1056-3-0x0000000001230000-0x0000000001231000-memory.dmp
    Filesize

    4KB

  • memory/1668-9-0x0000000000000000-mapping.dmp
  • memory/1756-26-0x0000000000400000-0x0000000000466000-memory.dmp
    Filesize

    408KB

  • memory/1756-27-0x00000000004617EE-mapping.dmp
  • memory/1756-29-0x0000000075A61000-0x0000000075A63000-memory.dmp
    Filesize

    8KB

  • memory/1756-31-0x0000000072F30000-0x000000007361E000-memory.dmp
    Filesize

    6.9MB

  • memory/1756-32-0x0000000000400000-0x0000000000466000-memory.dmp
    Filesize

    408KB

  • memory/1756-34-0x0000000005090000-0x0000000005091000-memory.dmp
    Filesize

    4KB