Analysis

  • max time kernel
    138s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-05-2022 22:47

General

  • Target

    Remit.Advice.exe

  • Size

    406KB

  • MD5

    eee0330f850eeb8d07aeb8e180afc051

  • SHA1

    0a64e31ae85096b82c8d36b497eb1fab9bc8fc10

  • SHA256

    cdebb39b2a4f203a8c0be1ce06cbeed1396321d8871d3cc46d4c6639ae7d25a2

  • SHA512

    66a0fc4a1eefb21a31297a4350084b6a8ce4b25af3bbf224c9b387ed7736c7f5465ca97c40454f6c5506d4f3d390f3271fb709de1a3094170aa057004d597fda

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.itdone.cz
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    viObavejMa

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.itdone.cz
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    viObavejMa

Signatures

  • AgentTesla

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

  • AgentTesla Payload 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Remit.Advice.exe
    "C:\Users\Admin\AppData\Local\Temp\Remit.Advice.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:5052
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WiAEpdKhZ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC5F0.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1044
    • C:\Users\Admin\AppData\Local\Temp\Remit.Advice.exe
      "C:\Users\Admin\AppData\Local\Temp\Remit.Advice.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:4416

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpC5F0.tmp

    Filesize

    1KB

    MD5

    1a1f844a8173146bf8a0c23d2d927543

    SHA1

    f3f66b296673a5e68d4822273636afaec14a41f1

    SHA256

    1d6ac000126e0230770e763be4397d81ed23f5b88594dd9bb04ceeb5747434cd

    SHA512

    0b50908e6dfca00e9d8094b78e12c18e1bd1face5ae1ac81b4593b3c7d92a581bd3b1a86bdfa3b9a13c7e0b3d3dd17f1481628648c64a78ead2ae8859e492af3

  • memory/1044-134-0x0000000000000000-mapping.dmp

  • memory/4416-136-0x0000000000000000-mapping.dmp

  • memory/4416-137-0x0000000000400000-0x000000000044A000-memory.dmp

    Filesize

    296KB

  • memory/4416-138-0x0000000005DC0000-0x0000000005E26000-memory.dmp

    Filesize

    408KB

  • memory/4416-139-0x0000000006230000-0x0000000006280000-memory.dmp

    Filesize

    320KB

  • memory/5052-130-0x0000000000A00000-0x0000000000A6C000-memory.dmp

    Filesize

    432KB

  • memory/5052-131-0x00000000054D0000-0x0000000005562000-memory.dmp

    Filesize

    584KB

  • memory/5052-132-0x0000000005B70000-0x0000000005C0C000-memory.dmp

    Filesize

    624KB

  • memory/5052-133-0x00000000061C0000-0x0000000006764000-memory.dmp

    Filesize

    5.6MB