Analysis

  • max time kernel
    150s
  • max time network
    206s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    06-12-2022 06:57

General

  • Target

    SWIFT-EUR 38650_06122022.xls

  • Size

    1.5MB

  • MD5

    21f2f35e1dbb15d23b42df683f031c67

  • SHA1

    31274255f4db8d5153668ccd2f8ffb1730e5d53a

  • SHA256

    ec197e8b1475730b15e799ccc38cca8d6ffca376e99b2cc81d2fc33b428e4cd7

  • SHA512

    a35ae509bb0e39df35982f22a8d7ad14e3d9da0d2722fc038d584807a6fd6a961c62a7f67f244cdfcefb9121306addff08d01717ace77a7f94f2ea60edd80cac

  • SSDEEP

    24576:vzxXXXXXXXXXXXXUXXXXXXXXXXXXXXXXD/mkpr5XXXXXXXXXXXXUXXXXXXXrXXXc:wMG0pS+YUQ

Malware Config

Extracted

Family

agenttesla

Credentials

Signatures

  • AgentTesla

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

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 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.

  • Uses the VBS compiler for execution 1 TTPs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 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.

  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\SWIFT-EUR 38650_06122022.xls"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:2028
  • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
    "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
    1⤵
    • Blocklisted process makes network request
    • Loads dropped DLL
    • Launches Equation Editor
    • Suspicious use of WriteProcessMemory
    PID:1692
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:1164
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Public\vbc.exe"
        3⤵
        • Drops file in System32 directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1808
      • C:\Users\Public\vbc.exe
        "C:\Users\Public\vbc.exe"
        3⤵
        • Executes dropped EXE
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:1628

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scripting

1
T1064

Exploitation for Client Execution

1
T1203

Defense Evasion

Scripting

1
T1064

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

System Information Discovery

2
T1082

Query Registry

1
T1012

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Public\vbc.exe
    Filesize

    867KB

    MD5

    82e3aa2dbb518a941c7062b944c027e2

    SHA1

    f13a2845c123b19f3083b96241a2a9693a11aa04

    SHA256

    2c4a2cc243ae3181ece66667f70d020931b62714e6a0f96ae9e2bb134cf480e1

    SHA512

    f5d3f98e0e2af5d17b2e34846cabd8855cb729260c41eb3f932bc4b699b58030854426a3a0886589a54137dd225da1f523aaecc762bfe68f6310fc62c3af1876

  • C:\Users\Public\vbc.exe
    Filesize

    867KB

    MD5

    82e3aa2dbb518a941c7062b944c027e2

    SHA1

    f13a2845c123b19f3083b96241a2a9693a11aa04

    SHA256

    2c4a2cc243ae3181ece66667f70d020931b62714e6a0f96ae9e2bb134cf480e1

    SHA512

    f5d3f98e0e2af5d17b2e34846cabd8855cb729260c41eb3f932bc4b699b58030854426a3a0886589a54137dd225da1f523aaecc762bfe68f6310fc62c3af1876

  • C:\Users\Public\vbc.exe
    Filesize

    867KB

    MD5

    82e3aa2dbb518a941c7062b944c027e2

    SHA1

    f13a2845c123b19f3083b96241a2a9693a11aa04

    SHA256

    2c4a2cc243ae3181ece66667f70d020931b62714e6a0f96ae9e2bb134cf480e1

    SHA512

    f5d3f98e0e2af5d17b2e34846cabd8855cb729260c41eb3f932bc4b699b58030854426a3a0886589a54137dd225da1f523aaecc762bfe68f6310fc62c3af1876

  • \Users\Public\vbc.exe
    Filesize

    867KB

    MD5

    82e3aa2dbb518a941c7062b944c027e2

    SHA1

    f13a2845c123b19f3083b96241a2a9693a11aa04

    SHA256

    2c4a2cc243ae3181ece66667f70d020931b62714e6a0f96ae9e2bb134cf480e1

    SHA512

    f5d3f98e0e2af5d17b2e34846cabd8855cb729260c41eb3f932bc4b699b58030854426a3a0886589a54137dd225da1f523aaecc762bfe68f6310fc62c3af1876

  • \Users\Public\vbc.exe
    Filesize

    867KB

    MD5

    82e3aa2dbb518a941c7062b944c027e2

    SHA1

    f13a2845c123b19f3083b96241a2a9693a11aa04

    SHA256

    2c4a2cc243ae3181ece66667f70d020931b62714e6a0f96ae9e2bb134cf480e1

    SHA512

    f5d3f98e0e2af5d17b2e34846cabd8855cb729260c41eb3f932bc4b699b58030854426a3a0886589a54137dd225da1f523aaecc762bfe68f6310fc62c3af1876

  • memory/1164-66-0x0000000000CA0000-0x0000000000D7E000-memory.dmp
    Filesize

    888KB

  • memory/1164-75-0x0000000004DD0000-0x0000000004E1A000-memory.dmp
    Filesize

    296KB

  • memory/1164-72-0x0000000005160000-0x00000000051E4000-memory.dmp
    Filesize

    528KB

  • memory/1164-71-0x0000000000360000-0x000000000036E000-memory.dmp
    Filesize

    56KB

  • memory/1164-68-0x0000000000340000-0x0000000000356000-memory.dmp
    Filesize

    88KB

  • memory/1164-63-0x0000000000000000-mapping.dmp
  • memory/1628-79-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1628-80-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1628-87-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1628-85-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1628-82-0x0000000000437C8E-mapping.dmp
  • memory/1628-76-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1628-77-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1628-81-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1808-90-0x000000006FA80000-0x000000007002B000-memory.dmp
    Filesize

    5.7MB

  • memory/1808-89-0x000000006FA80000-0x000000007002B000-memory.dmp
    Filesize

    5.7MB

  • memory/1808-73-0x0000000000000000-mapping.dmp
  • memory/2028-57-0x0000000072B6D000-0x0000000072B78000-memory.dmp
    Filesize

    44KB

  • memory/2028-54-0x000000002F471000-0x000000002F474000-memory.dmp
    Filesize

    12KB

  • memory/2028-55-0x0000000071B81000-0x0000000071B83000-memory.dmp
    Filesize

    8KB

  • memory/2028-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/2028-59-0x0000000072B6D000-0x0000000072B78000-memory.dmp
    Filesize

    44KB

  • memory/2028-58-0x00000000760B1000-0x00000000760B3000-memory.dmp
    Filesize

    8KB

  • memory/2028-70-0x0000000072B6D000-0x0000000072B78000-memory.dmp
    Filesize

    44KB

  • memory/2028-69-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB