Analysis

  • max time kernel
    97s
  • max time network
    29s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    09-11-2020 20:59

General

  • Target

    znol5gxxtd2gytr.msi

  • Size

    492KB

  • MD5

    3108d539e45f8a66f4ab8b2c5e20497f

  • SHA1

    a514c5f3d637dd86af5d32ccf55bd7df2a3abec1

  • SHA256

    abbcbdace318afff0408188e4e1025ebc49c3157838066d775b5e70a5c8c2620

  • SHA512

    3da9c92951e893d2e8c3ac05b042580ffb693159d9b5536525e9bbdac39c6a14b577d23b5ff0ab5fd4b70a3f3dd7c0a98a383a191067a03910597b5c55dd9908

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.eljsn.website
  • Port:
    587
  • Username:
    infotect@eljsn.website
  • Password:
    5C%+1~13zgdJ**

Signatures

  • AgentTesla

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

  • AgentTesla Payload 4 IoCs
  • rezer0 1 IoCs

    Detects ReZer0, a packer with multiple versions used in various campaigns.

  • Executes dropped EXE 2 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.

  • Enumerates connected drives 3 TTPs 48 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 10 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 data under HKEY_USERS 44 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 62 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\znol5gxxtd2gytr.msi
    1⤵
    • Enumerates connected drives
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:1080
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1264
    • C:\Windows\Installer\MSI3075.tmp
      "C:\Windows\Installer\MSI3075.tmp"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:1332
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\RfjXgrDPBFsZY" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBBA1.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:1496
      • C:\Windows\Installer\MSI3075.tmp
        "{path}"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:1596
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1352
  • C:\Windows\system32\DrvInst.exe
    DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot12" "" "" "6d110b0a3" "0000000000000000" "00000000000002CC" "00000000000005C0"
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Suspicious use of AdjustPrivilegeToken
    PID:932

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

1
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpBBA1.tmp
    MD5

    a082e7a532d3137920081b945d07365d

    SHA1

    58441d87f4fb758d0873354df88da90fbb7d0efc

    SHA256

    13f98dc8ad6ec60eff3f542c15e7c58912193019bc4dbc56a4fff5e9aeb5f508

    SHA512

    a169866c13a793e875db19eeef8faf030865fa400fb694e62e04bdef3d03e6aa85f0543262107117445a0ccf0c62eaf90204e7b434981e58854fdb78fab824f5

  • C:\Windows\Installer\MSI3075.tmp
    MD5

    31310b7aaf4c734c755f9af5fdb21735

    SHA1

    d684dff80d9c49019decb0c9c1c613aa525b0f37

    SHA256

    a7e3766ef281daddb6fbdd9af745b0776abb319b7485ecec75160c3368827254

    SHA512

    4f1998a78f4f23b242dbfb61376941930dbfb6304296740eefb898127df486a4cc09a6ad95ab5f87a157a018d35691d8733a9e9a6f17973edf3801aa613ad45d

  • C:\Windows\Installer\MSI3075.tmp
    MD5

    31310b7aaf4c734c755f9af5fdb21735

    SHA1

    d684dff80d9c49019decb0c9c1c613aa525b0f37

    SHA256

    a7e3766ef281daddb6fbdd9af745b0776abb319b7485ecec75160c3368827254

    SHA512

    4f1998a78f4f23b242dbfb61376941930dbfb6304296740eefb898127df486a4cc09a6ad95ab5f87a157a018d35691d8733a9e9a6f17973edf3801aa613ad45d

  • C:\Windows\Installer\MSI3075.tmp
    MD5

    31310b7aaf4c734c755f9af5fdb21735

    SHA1

    d684dff80d9c49019decb0c9c1c613aa525b0f37

    SHA256

    a7e3766ef281daddb6fbdd9af745b0776abb319b7485ecec75160c3368827254

    SHA512

    4f1998a78f4f23b242dbfb61376941930dbfb6304296740eefb898127df486a4cc09a6ad95ab5f87a157a018d35691d8733a9e9a6f17973edf3801aa613ad45d

  • memory/1080-1-0x00000000040F0000-0x00000000040F4000-memory.dmp
    Filesize

    16KB

  • memory/1080-31-0x0000000002300000-0x0000000002304000-memory.dmp
    Filesize

    16KB

  • memory/1080-0-0x0000000003300000-0x0000000003304000-memory.dmp
    Filesize

    16KB

  • memory/1264-7-0x0000000000F20000-0x0000000000F24000-memory.dmp
    Filesize

    16KB

  • memory/1264-27-0x0000000002F30000-0x0000000002F34000-memory.dmp
    Filesize

    16KB

  • memory/1264-6-0x0000000000F20000-0x0000000000F24000-memory.dmp
    Filesize

    16KB

  • memory/1264-30-0x0000000002F30000-0x0000000002F34000-memory.dmp
    Filesize

    16KB

  • memory/1264-5-0x00000000017A0000-0x00000000017A4000-memory.dmp
    Filesize

    16KB

  • memory/1264-29-0x0000000000F20000-0x0000000000F24000-memory.dmp
    Filesize

    16KB

  • memory/1332-12-0x0000000074CF0000-0x00000000753DE000-memory.dmp
    Filesize

    6.9MB

  • memory/1332-13-0x0000000000D30000-0x0000000000D31000-memory.dmp
    Filesize

    4KB

  • memory/1332-15-0x00000000001F0000-0x0000000000200000-memory.dmp
    Filesize

    64KB

  • memory/1332-16-0x0000000000260000-0x00000000002AD000-memory.dmp
    Filesize

    308KB

  • memory/1332-9-0x0000000000000000-mapping.dmp
  • memory/1496-17-0x0000000000000000-mapping.dmp
  • memory/1596-24-0x0000000074C70000-0x000000007535E000-memory.dmp
    Filesize

    6.9MB

  • memory/1596-23-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1596-22-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1596-20-0x00000000004470BE-mapping.dmp
  • memory/1596-19-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB