Analysis

  • max time kernel
    130s
  • max time network
    121s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    15-09-2021 06:49

General

  • Target

    Invoice.doc.exe

  • Size

    860KB

  • MD5

    6701efac5ff142914e5b353571045b83

  • SHA1

    614b96a8c0f1f4732b5948b9ca8b8262edc9318a

  • SHA256

    4f9e6d626a2aa193431ca948dde9a3e526124f88dec8ed465ec7785d99368432

  • SHA512

    dad3059096af254b6e24a5f4d565de0c351093f50a58204195195e8e25f5b3818404ca49421e4f1e71a0b61da6d93a718079b6da01d2bee0d30a3cceef870c61

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.esquiresweaters.com
  • Port:
    587
  • Username:
    imam@esquiresweaters.com
  • Password:
    Esquire@#2078

Signatures

  • AgentTesla

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

  • .NET Reactor proctector 1 IoCs

    Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

  • AgentTesla Payload 4 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.

  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Invoice.doc.exe
    "C:\Users\Admin\AppData\Local\Temp\Invoice.doc.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:568
    • C:\Users\Admin\AppData\Local\Temp\Invoice.doc.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:2884

Network

MITRE ATT&CK Matrix ATT&CK v6

Credential Access

Credentials in Files

3
T1081

Collection

Data from Local System

3
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

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

    90acfd72f14a512712b1a7380c0faf60

    SHA1

    40ba4accb8faa75887e84fb8e38d598dc8cf0f12

    SHA256

    20806822f0c130b340504132c1461b589261fbbc518e468f4f90733ab514cb86

    SHA512

    29dbf85e14e60868574cb4dc9bda83d3c229fb956733d8d2557f2475ee0e690ac9c2e72f31e02284996da6906ba2dbfa382a29b04c15a2406571d8ee19ad16b9

  • memory/568-119-0x0000000004F50000-0x0000000004F51000-memory.dmp
    Filesize

    4KB

  • memory/568-122-0x0000000000D80000-0x0000000000D8E000-memory.dmp
    Filesize

    56KB

  • memory/568-118-0x0000000004EA0000-0x0000000004EA1000-memory.dmp
    Filesize

    4KB

  • memory/568-114-0x0000000000320000-0x0000000000321000-memory.dmp
    Filesize

    4KB

  • memory/568-124-0x000000000B940000-0x000000000B97C000-memory.dmp
    Filesize

    240KB

  • memory/568-121-0x0000000005050000-0x0000000005051000-memory.dmp
    Filesize

    4KB

  • memory/568-117-0x00000000053A0000-0x00000000053A1000-memory.dmp
    Filesize

    4KB

  • memory/568-123-0x00000000088B0000-0x0000000008933000-memory.dmp
    Filesize

    524KB

  • memory/568-120-0x0000000004EA0000-0x000000000539E000-memory.dmp
    Filesize

    5.0MB

  • memory/568-116-0x0000000004E00000-0x0000000004E01000-memory.dmp
    Filesize

    4KB

  • memory/2884-126-0x000000000043764E-mapping.dmp
  • memory/2884-125-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/2884-132-0x00000000053E0000-0x00000000058DE000-memory.dmp
    Filesize

    5.0MB

  • memory/2884-133-0x0000000005840000-0x0000000005841000-memory.dmp
    Filesize

    4KB

  • memory/2884-134-0x00000000060D0000-0x00000000060D1000-memory.dmp
    Filesize

    4KB

  • memory/2884-137-0x00000000053E0000-0x00000000058DE000-memory.dmp
    Filesize

    5.0MB