Analysis

  • max time kernel
    143s
  • max time network
    147s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    11-05-2021 14:05

General

  • Target

    DUE INVOICES.exe

  • Size

    958KB

  • MD5

    c3dd015c631875adfecc6c229b474cf4

  • SHA1

    26835d1df6761a455b6645fd27dba5dc7ed506b3

  • SHA256

    7299f2323910def53bb344e98441a66dba82b84b0d8ec89dbddf0ee6a936280a

  • SHA512

    dab1e8d81bcbf7a79aa454711a02c8f6cc39ce7aa07031a7891f57aba9f4bdb5a8d215436ff912a615954ace3d43a5d81e8fd01c08694585c4bbbf80967ecb4c

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.sat0rius.com
  • Port:
    587
  • Username:
    sahar.fuchs@sat0rius.com
  • Password:
    Almaseera_delta_0000

Signatures

  • AgentTesla

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

  • AgentTesla Payload 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 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\DUE INVOICES.exe
    "C:\Users\Admin\AppData\Local\Temp\DUE INVOICES.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:424
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OOzsNXDsbStEu" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFAFB.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1548
    • C:\Users\Admin\AppData\Local\Temp\DUE INVOICES.exe
      "C:\Users\Admin\AppData\Local\Temp\DUE INVOICES.exe"
      2⤵
        PID:3548
      • C:\Users\Admin\AppData\Local\Temp\DUE INVOICES.exe
        "C:\Users\Admin\AppData\Local\Temp\DUE INVOICES.exe"
        2⤵
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2136

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Defense Evasion

    Modify Registry

    1
    T1112

    Discovery

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\DUE INVOICES.exe.log
      MD5

      90acfd72f14a512712b1a7380c0faf60

      SHA1

      40ba4accb8faa75887e84fb8e38d598dc8cf0f12

      SHA256

      20806822f0c130b340504132c1461b589261fbbc518e468f4f90733ab514cb86

      SHA512

      29dbf85e14e60868574cb4dc9bda83d3c229fb956733d8d2557f2475ee0e690ac9c2e72f31e02284996da6906ba2dbfa382a29b04c15a2406571d8ee19ad16b9

    • C:\Users\Admin\AppData\Local\Temp\tmpFAFB.tmp
      MD5

      a98c28ad94f299ef6e16c157c45ccf4a

      SHA1

      57b000a434d87dcd4c929fb2895de6f447e5b6e8

      SHA256

      77113fac01004d7e94daf2480bf3d352341200140aed1dc8b0c556d095788c14

      SHA512

      e9b7acbe423c19e79e562baeef126a76308704804bb90633736fe9c792a558d6434633669f98e086a88d6cd3bbcda88a7aef932a24255b3eefd10692b6a5a656

    • memory/424-123-0x00000000058B0000-0x0000000005988000-memory.dmp
      Filesize

      864KB

    • memory/424-124-0x0000000007E50000-0x0000000007EEF000-memory.dmp
      Filesize

      636KB

    • memory/424-119-0x0000000004AB0000-0x0000000004FAE000-memory.dmp
      Filesize

      5.0MB

    • memory/424-120-0x00000000049F0000-0x00000000049F1000-memory.dmp
      Filesize

      4KB

    • memory/424-121-0x0000000004BE0000-0x0000000004BE1000-memory.dmp
      Filesize

      4KB

    • memory/424-122-0x0000000004CF0000-0x0000000004CF4000-memory.dmp
      Filesize

      16KB

    • memory/424-114-0x0000000000030000-0x0000000000031000-memory.dmp
      Filesize

      4KB

    • memory/424-118-0x0000000004AB0000-0x0000000004AB1000-memory.dmp
      Filesize

      4KB

    • memory/424-116-0x0000000004A10000-0x0000000004A11000-memory.dmp
      Filesize

      4KB

    • memory/424-117-0x0000000004FB0000-0x0000000004FB1000-memory.dmp
      Filesize

      4KB

    • memory/1548-125-0x0000000000000000-mapping.dmp
    • memory/2136-127-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/2136-128-0x000000000043759E-mapping.dmp
    • memory/2136-134-0x0000000005040000-0x000000000553E000-memory.dmp
      Filesize

      5.0MB

    • memory/2136-135-0x00000000051B0000-0x00000000051B1000-memory.dmp
      Filesize

      4KB

    • memory/2136-136-0x0000000005D30000-0x0000000005D31000-memory.dmp
      Filesize

      4KB