Analysis

  • max time kernel
    108s
  • max time network
    45s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    29-11-2022 18:51

General

  • Target

    Device/HarddiskVolume4/Users/tim1k/AppData/Local/WebEx/WebEx64/Meetings/wbxreport.exe

  • Size

    2.5MB

  • MD5

    01b891763adad5caaa8b5f25da141f92

  • SHA1

    4586fc3c7ab0fa768fd8cd4d39c91e9fadb00735

  • SHA256

    4d42f0af47dfbe2cb2cd5a36e0853a2e9abef4915a41a93cc1c1cf4e80a06eda

  • SHA512

    82adf851965b063432788f308aec74e6c2f6a033eb90fc708956fead6ae11cc0e3cce07f0e7c86f60b87215fb322c3561272e3ae13be78939e85ef90d7729f6a

  • SSDEEP

    12288:a7XSDM7lMqd1JbAiw9ng9kmY+xgDTkDnit9KbjgA:a7XSQ915cqkmmTkDn0A

Malware Config

Signatures

  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies registry class 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume4\Users\tim1k\AppData\Local\WebEx\WebEx64\Meetings\wbxreport.exe
    "C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume4\Users\tim1k\AppData\Local\WebEx\WebEx64\Meetings\wbxreport.exe"
    1⤵
    • Modifies system executable filetype association
    • Loads dropped DLL
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1360
    • C:\Users\Admin\AppData\Local\Temp\3582-490\wbxreport.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\wbxreport.exe"
      2⤵
      • Executes dropped EXE
      PID:2016

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Change Default File Association

1
T1042

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

1
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\3582-490\wbxreport.exe
    Filesize

    2.4MB

    MD5

    369105461864b6428cbf5cb8e9302c99

    SHA1

    8edf0a380b5a94caefdd28b5f225788b1014d076

    SHA256

    5b448d8cc94e0d40a0670c84a04d2e4d294421fb4eeb24d2b8f7a989002a1c89

    SHA512

    c2a24d7ab6768f7fa06948be1c2d0a109b000a2a23d0cd3ad33fafdf9c68d60c669387bedeb5b909738e39603bad556e8c85fd689c5274c13322df22756a8fda

  • \PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE
    Filesize

    252KB

    MD5

    9e2b9928c89a9d0da1d3e8f4bd96afa7

    SHA1

    ec66cda99f44b62470c6930e5afda061579cde35

    SHA256

    8899b4ed3446b7d55b54defbc1acb7c5392a4b3bc8ec2cdc7c31171708965043

    SHA512

    2ca5ad1d0e12a8049de885b90b7f56fe77c868e0d6dae4ec4b6f3bc0bf7b2e73295cc9b1328c2b45357ffb0d7804622ab3f91a56140b098e93b691032d508156

  • \Users\Admin\AppData\Local\Temp\3582-490\wbxreport.exe
    Filesize

    2.4MB

    MD5

    369105461864b6428cbf5cb8e9302c99

    SHA1

    8edf0a380b5a94caefdd28b5f225788b1014d076

    SHA256

    5b448d8cc94e0d40a0670c84a04d2e4d294421fb4eeb24d2b8f7a989002a1c89

    SHA512

    c2a24d7ab6768f7fa06948be1c2d0a109b000a2a23d0cd3ad33fafdf9c68d60c669387bedeb5b909738e39603bad556e8c85fd689c5274c13322df22756a8fda

  • memory/1360-54-0x00000000756A1000-0x00000000756A3000-memory.dmp
    Filesize

    8KB

  • memory/2016-56-0x0000000000000000-mapping.dmp