Analysis

  • max time kernel
    122s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    25-11-2024 23:08

General

  • Target

    LB3.exe

  • Size

    146KB

  • MD5

    39c9477cf131ca5ccc05c8871c0e10e6

  • SHA1

    07b2581b2cb41053d09c4bb896aaabc1d28f2a7b

  • SHA256

    939281eac1c6e5aa2e4238a1e545e67b2609c15f517474b2a5133bb64fe9c1eb

  • SHA512

    689fd585232031f746b1573d3ed66ac329420611d4e1092ce6952b49ab0c168091726bd02189a4e183d1196ced4f51953e4eb25a5219a36f86d8f6761da9f129

  • SSDEEP

    1536:xzICS4AAwczUUf8y8gvMH+1zGSNAojMP95D1xDqk3sA9atm8z+L8QBfuSoyAMjwT:KqJogYkcSNm9V7D7352v+L8DnyAewT

Malware Config

Signatures

  • Renames multiple (320) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Drops desktop.ini file(s) 2 IoCs
  • Indicator Removal: File Deletion 1 TTPs

    Adversaries may delete files left behind by the actions of their intrusion activity.

  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 Control Panel 2 IoCs
  • Modifies registry class 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious behavior: RenamesItself 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\LB3.exe
    "C:\Users\Admin\AppData\Local\Temp\LB3.exe"
    1⤵
    • Loads dropped DLL
    • Drops desktop.ini file(s)
    • Sets desktop wallpaper using registry
    • System Location Discovery: System Language Discovery
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2420
    • C:\ProgramData\A380.tmp
      "C:\ProgramData\A380.tmp"
      2⤵
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:2680
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\A380.tmp >> NUL
        3⤵
        • System Location Discovery: System Language Discovery
        PID:1328
  • C:\Windows\system32\AUDIODG.EXE
    C:\Windows\system32\AUDIODG.EXE 0x14c
    1⤵
      PID:884

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\$Recycle.Bin\S-1-5-21-3533259084-2542256011-65585152-1000\desktop.ini

      Filesize

      129B

      MD5

      97bdb9ac23c5d99f3502986d0c253075

      SHA1

      44c3874e3dff3233a7f8ddf8a0c5382288f78848

      SHA256

      555e4d8367fc34553b3c01ff3e2d3feaded6ed3fc64387c10b2325ac8dd1c7bd

      SHA512

      735199a4158124b97314e3a71d155d8e27184effa83787b7baeff14ea2f9110253ca19807d081d038ed4b500638bd74e09fd1d2ef2c2e6ade130666b16c4a653

    • C:\1pvSvxmZY.README.txt

      Filesize

      348B

      MD5

      9810eed5ecd966874ebeb398ac6531ed

      SHA1

      17d2e2bc15df652734b79185cb323e652559fd6a

      SHA256

      53183e5ed0cf42bed46b17c9dcc92ea49737bb57dce34f1e20675a913796566e

      SHA512

      b26ca61461ed8b09f037e33d209cd0a22959b89e3e7895e057f544010fd5ae037e4fa76311763c121cd6e8b3050de22fa7d2163b4d9cf40585e14f5024e0cb79

    • C:\Users\Admin\AppData\Local\Temp\DDDDDDD

      Filesize

      146KB

      MD5

      a8aed716ea9202d7da29bdfc58637cb5

      SHA1

      105814ef0cce79ceaacbe221ad8f7f3a1197859b

      SHA256

      22225c56c8e558540cec6cbcf114186a3b28ccb898b88fb1cee1bb3caf881054

      SHA512

      a2674e38056ba17b7ef760c949435560ba08cc58368d3427171166a1def408947c28502ca130ae9d09ce8458f5bef4d09c43f94261135c1306f98eadb925751d

    • F:\$RECYCLE.BIN\S-1-5-21-3533259084-2542256011-65585152-1000\DDDDDDDDDDD

      Filesize

      129B

      MD5

      e90078364187290445a1e6bff03015e7

      SHA1

      fc5050a3d5c7ab0623816268aabe895a746975b2

      SHA256

      4bfb033c842e385364af1d9c3ffc3aa45ed533a7ff7989efbccd5946bb6bfbdc

      SHA512

      4ab135ab6449d493d536b98e08ee3574581f5c361a5b4c19244d140fe5b7b3ecd279993eb913566343ef60e900561cfd551e1abf702b86652a9ec754e9cb228c

    • \ProgramData\A380.tmp

      Filesize

      14KB

      MD5

      294e9f64cb1642dd89229fff0592856b

      SHA1

      97b148c27f3da29ba7b18d6aee8a0db9102f47c9

      SHA256

      917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

      SHA512

      b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

    • memory/2420-0-0x0000000002120000-0x0000000002160000-memory.dmp

      Filesize

      256KB

    • memory/2680-856-0x00000000003B0000-0x00000000003F0000-memory.dmp

      Filesize

      256KB

    • memory/2680-858-0x000000007EF20000-0x000000007EF21000-memory.dmp

      Filesize

      4KB

    • memory/2680-857-0x00000000003B0000-0x00000000003F0000-memory.dmp

      Filesize

      256KB

    • memory/2680-855-0x000000007EF80000-0x000000007EF81000-memory.dmp

      Filesize

      4KB

    • memory/2680-854-0x000000007EFA0000-0x000000007EFA1000-memory.dmp

      Filesize

      4KB

    • memory/2680-888-0x000000007EF60000-0x000000007EF61000-memory.dmp

      Filesize

      4KB

    • memory/2680-887-0x000000007EF40000-0x000000007EF41000-memory.dmp

      Filesize

      4KB