Analysis

  • max time kernel
    132s
  • max time network
    147s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    18-10-2021 21:30

General

  • Target

    SecuriteInfo.com.Variant.Cerbu.117505.10723.10196.exe

  • Size

    790KB

  • MD5

    9fd8919e62792e6d93995b5f7abda850

  • SHA1

    c143d0ece3715bc4c484e201f4b9c5e7630e7fd2

  • SHA256

    20e9c3ad420ffd76094590adced58f056d38e5d6afe3ee9e21e7b29ff5a80da7

  • SHA512

    35bcd80094c49e5ef9399a52277b4a592cd4bd659a50ebabfbf62775d5681f1028eb29a357f4e19ab93a528f14e0632eebc8a6f2ccf9234bc2f7d76a80dd963e

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.xxltrucck.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    vFguU*i0

Signatures

  • AgentTesla

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

  • AgentTesla Payload 3 IoCs
  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Obfuscated with Agile.Net obfuscator 1 IoCs

    Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

  • 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.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Cerbu.117505.10723.10196.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Cerbu.117505.10723.10196.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2072
    • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
      "C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
      2⤵
      • Drops file in Drivers directory
      • Executes dropped EXE
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:2968

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe

    MD5

    91c9ae9c9a17a9db5e08b120e668c74c

    SHA1

    50770954c1ceb0bb6f1d5d3f2de2a0a065773723

    SHA256

    e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

    SHA512

    ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

  • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe

    MD5

    91c9ae9c9a17a9db5e08b120e668c74c

    SHA1

    50770954c1ceb0bb6f1d5d3f2de2a0a065773723

    SHA256

    e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

    SHA512

    ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

  • memory/2072-126-0x0000000009B90000-0x0000000009B91000-memory.dmp

    Filesize

    4KB

  • memory/2072-118-0x0000000005C70000-0x0000000005C71000-memory.dmp

    Filesize

    4KB

  • memory/2072-120-0x00000000068E0000-0x0000000006901000-memory.dmp

    Filesize

    132KB

  • memory/2072-121-0x0000000006980000-0x0000000006981000-memory.dmp

    Filesize

    4KB

  • memory/2072-122-0x0000000006940000-0x0000000006941000-memory.dmp

    Filesize

    4KB

  • memory/2072-123-0x0000000006B90000-0x0000000006B91000-memory.dmp

    Filesize

    4KB

  • memory/2072-124-0x0000000005DB1000-0x0000000005DB2000-memory.dmp

    Filesize

    4KB

  • memory/2072-125-0x00000000075B0000-0x00000000075BB000-memory.dmp

    Filesize

    44KB

  • memory/2072-115-0x0000000000FC0000-0x0000000000FC1000-memory.dmp

    Filesize

    4KB

  • memory/2072-119-0x0000000005DB0000-0x0000000005DB1000-memory.dmp

    Filesize

    4KB

  • memory/2072-117-0x0000000005880000-0x0000000005881000-memory.dmp

    Filesize

    4KB

  • memory/2968-127-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/2968-128-0x000000000043773E-mapping.dmp

  • memory/2968-133-0x0000000005EA0000-0x0000000005EA1000-memory.dmp

    Filesize

    4KB

  • memory/2968-135-0x00000000059A0000-0x0000000005E9E000-memory.dmp

    Filesize

    5.0MB

  • memory/2968-136-0x0000000005940000-0x0000000005941000-memory.dmp

    Filesize

    4KB

  • memory/2968-139-0x0000000005B40000-0x0000000005B41000-memory.dmp

    Filesize

    4KB

  • memory/2968-140-0x00000000059A0000-0x0000000005E9E000-memory.dmp

    Filesize

    5.0MB