Analysis

  • max time kernel
    130s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-05-2022 23:42

General

  • Target

    Swift copy.pdf.. (2).exe

  • Size

    726KB

  • MD5

    d6f16dcc168e50d0f56ab75145967baa

  • SHA1

    53e0b0dc082921fd979bcdaf51e22d57c13e35d7

  • SHA256

    a63ac2c19153c340a54a2be27ac53722f5c5a653fd851b32931add8fe353c6c3

  • SHA512

    ec36263b3df765414755641f32c0c9af54017140e406886514e94c2ac82d9c38d00c0cf7341d7e84df348c66a44de6b49167d7ff4344dd9139267739318f8ffa

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.stankovic.hr
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    mp58zg

Signatures

  • AgentTesla

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

  • AgentTesla Payload 1 IoCs
  • Drops file in Drivers directory 1 IoCs
  • 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.

  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Swift copy.pdf.. (2).exe
    "C:\Users\Admin\AppData\Local\Temp\Swift copy.pdf.. (2).exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4760
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\&startupname&" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6C1.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2584
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "{path}"
      2⤵
      • Drops file in Drivers directory
      • Accesses Microsoft Outlook profiles
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:1148
      • C:\Windows\SysWOW64\REG.exe
        REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System / v DisableTaskMgr / t REG_DWORD / d 1 / f
        3⤵
        • Modifies registry key
        PID:1520

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

2
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp6C1.tmp
    Filesize

    1KB

    MD5

    4aa7d4126cf14e812f5bb881ec9442d0

    SHA1

    753f1873b92987a4d9d47d14555b0022ee25431b

    SHA256

    5864ffbfd512ba8a57ef045a45be0bdbd76e0f49aae6425959a9154c453cd9c6

    SHA512

    014a3a18e8e1667c1324658c0a7a3f7b83283d9a50c2fd47c92ad420df152c8e93b6517be2d22cc5bea741edffea202a899edc95ef43f9ec2ef940f34a29c3b6

  • memory/1148-137-0x0000000000000000-mapping.dmp
  • memory/1148-138-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1148-139-0x0000000005B80000-0x0000000005BE6000-memory.dmp
    Filesize

    408KB

  • memory/1148-140-0x0000000006A20000-0x0000000006A70000-memory.dmp
    Filesize

    320KB

  • memory/1520-141-0x0000000000000000-mapping.dmp
  • memory/2584-135-0x0000000000000000-mapping.dmp
  • memory/4760-130-0x0000000000270000-0x000000000032C000-memory.dmp
    Filesize

    752KB

  • memory/4760-131-0x0000000005170000-0x0000000005714000-memory.dmp
    Filesize

    5.6MB

  • memory/4760-132-0x0000000004CC0000-0x0000000004D52000-memory.dmp
    Filesize

    584KB

  • memory/4760-133-0x0000000004E70000-0x0000000004E7A000-memory.dmp
    Filesize

    40KB

  • memory/4760-134-0x0000000008750000-0x00000000087EC000-memory.dmp
    Filesize

    624KB