Analysis

  • max time kernel
    81s
  • max time network
    18s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    27-07-2021 23:03

General

  • Target

    bank account details.exe

  • Size

    1.1MB

  • MD5

    6fa33275b4f3de73faabdd5dc084f0c9

  • SHA1

    8b624a452820e2949eec05c2e16c6cb0cd685c12

  • SHA256

    54997c9767d784fc3d566238940f84541c4b614ec794aceeb84d2bb8a4104bf5

  • SHA512

    3854b0e82dae57b39d4cdbe4f82b044b08c618975878f68e2371e8de7df20c274a67187d1b02b1fcfe0153a195e6884bdba1bd23f55a0f315fe6823bb68cccbf

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.tejoofashions.com
  • Port:
    587
  • Username:
    it@tejoofashions.com
  • Password:
    OmiCron#2019

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
  • 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bank account details.exe
    "C:\Users\Admin\AppData\Local\Temp\bank account details.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1608
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ArWDYnLWLZTNbv" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3CD2.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1300
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "{path}"
      2⤵
      • Drops file in Drivers directory
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1628

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\Temp\tmp3CD2.tmp
    MD5

    7a858e105aabbf936eebdeddeb3aaede

    SHA1

    762fa12e8ab9e53d60e20829293d5d1729e35179

    SHA256

    5e6330712f9dd7ceee28cc823b4453f35b1808fb4bf6b18c03fb07cd27f0dd98

    SHA512

    32258cb190d24829fc5e08d88888b36717ec5452149949e3d71d68f25b2c67dcb535ec6e8671016220225a1c4145f434d3ae0255cfa240b84d7fab9228f6b246

  • memory/1300-66-0x0000000000000000-mapping.dmp
  • memory/1608-64-0x0000000005ED0000-0x0000000005FAF000-memory.dmp
    Filesize

    892KB

  • memory/1608-60-0x0000000000850000-0x0000000000851000-memory.dmp
    Filesize

    4KB

  • memory/1608-65-0x0000000005FB0000-0x0000000006053000-memory.dmp
    Filesize

    652KB

  • memory/1608-63-0x0000000000440000-0x0000000000442000-memory.dmp
    Filesize

    8KB

  • memory/1608-62-0x0000000004F10000-0x0000000004F11000-memory.dmp
    Filesize

    4KB

  • memory/1628-68-0x0000000000400000-0x0000000000466000-memory.dmp
    Filesize

    408KB

  • memory/1628-69-0x00000000004618AE-mapping.dmp
  • memory/1628-70-0x0000000000400000-0x0000000000466000-memory.dmp
    Filesize

    408KB

  • memory/1628-72-0x0000000075801000-0x0000000075803000-memory.dmp
    Filesize

    8KB

  • memory/1628-73-0x0000000004D70000-0x0000000004D71000-memory.dmp
    Filesize

    4KB

  • memory/1628-74-0x0000000004D71000-0x0000000004D72000-memory.dmp
    Filesize

    4KB