Resubmissions

13-03-2024 13:29

240313-qrejbsff49 8

13-03-2024 13:24

240313-qnhrksfe74 6

Analysis

  • max time kernel
    361s
  • max time network
    362s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • submitted
    13-03-2024 13:29

General

  • Target

    cisa.msi

  • Size

    1.5MB

  • MD5

    c4e8f3e02fd50a4051f11048f1355726

  • SHA1

    c82bf39c9f4797f346447aecc1070fb8c892010f

  • SHA256

    3a950d7e6736f17c3df90844c76d934dc66c17ec76841a4ad58de07af7955f0f

  • SHA512

    e44d8330c4ffdae01614ed5d11c2f112cff9b39bae793242f983d039e1404d371a2697a77fa65b740e43548ab1b203607a6d82b05ff3df741be02bd99a136592

  • SSDEEP

    24576:QjGxLNvYLSMvZCFlp8zBQSc0ZoCvqKwx0ECIgYmfLVYeBZr7A0r7Jh3OnJ3qXIoj:QjivYpW8zBQSc0ZnSKeZKumZr7A+D3O2

Malware Config

Extracted

Family

latrodectus

C2

https://aytobusesre.com/live/

https://scifimond.com/live/

Signatures

  • Latrodectus family
  • Latrodectus loader

    Latrodectus is a loader written in C++.

  • Detect larodectus Loader variant 2 2 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Drops file in Windows directory 11 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 10 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies data under HKEY_USERS 43 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\cisa.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:3056
  • 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:2636
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 3152DCA5BA29B2B767174D51C9C2C138 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:2612
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 56D08CFC24AA42F38178C03A4EA1A50B
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:1852
    • C:\Windows\Installer\MSI28A9.tmp
      "C:\Windows\Installer\MSI28A9.tmp" C:\Windows\System32\rundll32.exe C:\Users\Admin\AppData\Local\stat\falcon.dll, vgml
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:1568
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
      PID:2448
    • C:\Windows\system32\DrvInst.exe
      DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot19" "" "" "61530dda3" "0000000000000000" "00000000000003D8" "0000000000000588"
      1⤵
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      PID:1740
    • C:\Windows\System32\rundll32.exe
      "C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Local\stat\falcon.dll, vgml
      1⤵
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      PID:280

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Config.Msi\f762770.rbs

      Filesize

      1KB

      MD5

      9676c3a1e92eb2e5b8672624a4f3ae61

      SHA1

      49e1b608f636f6ac610785cc79af1af0f1165233

      SHA256

      d523a9111a24722cad01cd6e692e2c658ce787bcf455817533b1ff76d3764aab

      SHA512

      00339e4365db93e3a6ba0b947e96be7e0a4f4a1ca288edc7440e80f530132553c2b48682572d9c4870fe5edbba4ce8d396c239a940bcaa47083a035e2c361f37

    • C:\Users\Admin\AppData\Local\Temp\MSI992.tmp

      Filesize

      436KB

      MD5

      475d20c0ea477a35660e3f67ecf0a1df

      SHA1

      67340739f51e1134ae8f0ffc5ae9dd710e8e3a08

      SHA256

      426e6cf199a8268e8a7763ec3a4dd7add982b28c51d89ebea90ca792cbae14dd

      SHA512

      99525aaab2ab608134b5d66b5313e7fc3c2e2877395c5c171897d7a6c66efb26b606de1a4cb01118c2738ea4b6542e4eb4983e631231b3f340bf85e509a9589e

    • C:\Users\Admin\AppData\Local\stat\falcon.dll

      Filesize

      694KB

      MD5

      da8ae8e1de522b20a462239c6893613e

      SHA1

      7f65ef885815d81d220f9f42877ff0d696b0134c

      SHA256

      aee22a35cbdac3f16c3ed742c0b1bfe9739a13469cf43b36fb2c63565111028c

      SHA512

      d2dca9ba9272a0bdfa88f7520545e21a1f4d18dcacec36b072369cee8e28ba635a0214b47caef74b6f7fcd06e120d898da997e71c8955c72510972c66d2a855d

    • C:\Windows\Installer\MSI28A9.tmp

      Filesize

      389KB

      MD5

      b9545ed17695a32face8c3408a6a3553

      SHA1

      f6c31c9cd832ae2aebcd88e7b2fa6803ae93fc83

      SHA256

      1e0e63b446eecf6c9781c7d1cae1f46a3bb31654a70612f71f31538fb4f4729a

      SHA512

      f6d6dc40dcba5ff091452d7cc257427dcb7ce2a21816b4fec2ee249e63246b64667f5c4095220623533243103876433ef8c12c9b612c0e95fdfffe41d1504e04

    • memory/280-43-0x0000000000130000-0x0000000000144000-memory.dmp

      Filesize

      80KB

    • memory/280-44-0x0000000000130000-0x0000000000144000-memory.dmp

      Filesize

      80KB

    • memory/1568-37-0x0000000000160000-0x0000000000162000-memory.dmp

      Filesize

      8KB