Analysis

  • max time kernel
    150s
  • max time network
    12s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    27-07-2021 13:04

General

  • Target

    Purchase - Order.exe

  • Size

    491KB

  • MD5

    c25db03537a94168fe05f968720c735a

  • SHA1

    bdf8b7786bdd448a689e06347895ca8dbddab79c

  • SHA256

    3a94befc248570bf58be57f7b0e146985221219aefed7e437ddf865711b7c069

  • SHA512

    26f27f98183de9f87807add66919fbeabf1e6373dfd98360348860f551f3292deb347560cd2ac0fe7372424374d5f1b8a8add9d92739bca32e725374bb974241

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.zakhourco.com
  • Port:
    587
  • Username:
    mira.kassar@zakhourco.com
  • Password:
    #Za$out%12

Signatures

  • AgentTesla

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

  • AgentTesla Payload 3 IoCs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs
  • Looks for VMWare Tools registry key 2 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • 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 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Purchase - Order.exe
    "C:\Users\Admin\AppData\Local\Temp\Purchase - Order.exe"
    1⤵
    • Checks BIOS information in registry
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1028
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\wzqcOpgNYsw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1600.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:568
    • C:\Users\Admin\AppData\Local\Temp\Purchase - Order.exe
      "{path}"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1292

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

Virtualization/Sandbox Evasion

2
T1497

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

3
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

3
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp1600.tmp
    MD5

    1b1e76222f9b11a47150f06bfba4c8ad

    SHA1

    d637f1bb898216c6d23cc30cc8a41dd59efd36d1

    SHA256

    a63ce437a015b94e8d0fa2e89e473dce4f43dfafad6915f048235f518dfb12e7

    SHA512

    7abc08569545a1caf40dbab17fb9d26cb5faa0a417786651f005d68df9a22e8e791fe77554213a46506a89cf63a0fe28fdfba9cc4b14047cdccde094ce202171

  • memory/568-66-0x0000000000000000-mapping.dmp
  • memory/1028-60-0x0000000000840000-0x0000000000841000-memory.dmp
    Filesize

    4KB

  • memory/1028-62-0x0000000004D40000-0x0000000004D41000-memory.dmp
    Filesize

    4KB

  • memory/1028-63-0x0000000000430000-0x0000000000432000-memory.dmp
    Filesize

    8KB

  • memory/1028-64-0x0000000005CD0000-0x0000000005D52000-memory.dmp
    Filesize

    520KB

  • memory/1028-65-0x0000000004FE0000-0x000000000501D000-memory.dmp
    Filesize

    244KB

  • memory/1292-68-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1292-69-0x000000000043784E-mapping.dmp
  • memory/1292-70-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1292-72-0x0000000004D10000-0x0000000004D11000-memory.dmp
    Filesize

    4KB

  • memory/1292-73-0x0000000004D11000-0x0000000004D12000-memory.dmp
    Filesize

    4KB