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Analysis

  • max time kernel
    159s
  • max time network
    167s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/11/2022, 08:38

General

  • Target

    Bank letter.exe

  • Size

    1012KB

  • MD5

    a58b322c74d8dfba9c022607b0d0c26b

  • SHA1

    380f438ad2620f1582fe9b7d5b2ba84c3d6f3349

  • SHA256

    322a82cb52dd04f516915780a9eb9865e24bd284fedecf938e345270fa0f83b3

  • SHA512

    06d2ff7e199a1be0ca7357bb8e9bdbcc63f00d1082cab4ef086f344b6b88c00e2885db5e369329220463237558a43280b0d249349511ca9d6e01f8bac13f3118

  • SSDEEP

    12288:SLw5APwiU251kh53ZLsVOdl0160HQV7g5D+8Egpe0kOrZsEnGvjbLhsRuDIQoiCa:IPOoSbdlYHQVGioZNtrB3m

Malware Config

Extracted

Family

agenttesla

Credentials

Signatures

  • AgentTesla

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 1 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Bank letter.exe
    "C:\Users\Admin\AppData\Local\Temp\Bank letter.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4756
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ZDSHLar" /XML "C:\Users\Admin\AppData\Local\Temp\tmp56BB.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1744
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "{path}"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:5044

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp56BB.tmp

    Filesize

    1KB

    MD5

    2e8ddbd4a6369e791c7bba06d0c5bb62

    SHA1

    4f8410544d375be9c62a8ca8e2d4762067db30c5

    SHA256

    34e36ae94a423a06b6352da7c649dbc8a7fad6b541b7a668426eb7af727234a3

    SHA512

    2c32dcdb847a02b64aceda3b637f176c39b0af9e43a42c3321ef8bab8cf271fac4d7bd7db372151976ed94726d12e133c43636684cef113702fa5f020b908a3d

  • memory/4756-132-0x0000000000840000-0x0000000000944000-memory.dmp

    Filesize

    1.0MB

  • memory/4756-133-0x00000000058C0000-0x0000000005E64000-memory.dmp

    Filesize

    5.6MB

  • memory/4756-134-0x0000000005310000-0x00000000053A2000-memory.dmp

    Filesize

    584KB

  • memory/4756-135-0x00000000053B0000-0x000000000544C000-memory.dmp

    Filesize

    624KB

  • memory/4756-136-0x00000000052D0000-0x00000000052DA000-memory.dmp

    Filesize

    40KB

  • memory/5044-140-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/5044-141-0x0000000006590000-0x00000000065F6000-memory.dmp

    Filesize

    408KB

  • memory/5044-142-0x00000000068E0000-0x0000000006930000-memory.dmp

    Filesize

    320KB