Analysis

  • max time kernel
    649s
  • max time network
    1563s
  • platform
    windows11_x64
  • resource
    win11
  • submitted
    22-10-2021 14:39

General

  • Target

    Fri05eeb2dae7b88520a.exe

  • Size

    379KB

  • MD5

    9b07fc470646ce890bcb860a5fb55f13

  • SHA1

    ef01d45abaf5060a0b32319e0509968f6be3082f

  • SHA256

    506c6ee68b29701403739da25679b640d21b1b121f45dde5bc25705901a6ed0b

  • SHA512

    4cc1b725c6fb539d832d2d5315bbc63e967a41129d25c2102b2df19e4931e4e06c2a9f70a3336d98b9e031c636d021e713f10dbbd86a57f447a7581221a470cc

Malware Config

Signatures

  • Downloads MZ/PE file
  • Executes dropped EXE 3 IoCs
  • Sets service image path in registry 2 TTPs
  • Loads dropped DLL 2 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Program Files directory 3 IoCs
  • Drops file in Windows directory 6 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 14 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Fri05eeb2dae7b88520a.exe
    "C:\Users\Admin\AppData\Local\Temp\Fri05eeb2dae7b88520a.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4160
    • C:\Users\Admin\AppData\Local\Temp\is-SH86D.tmp\Fri05eeb2dae7b88520a.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-SH86D.tmp\Fri05eeb2dae7b88520a.tmp" /SL5="$20090,140785,56832,C:\Users\Admin\AppData\Local\Temp\Fri05eeb2dae7b88520a.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1284
      • C:\Users\Admin\AppData\Local\Temp\Fri05eeb2dae7b88520a.exe
        "C:\Users\Admin\AppData\Local\Temp\Fri05eeb2dae7b88520a.exe" /SILENT
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3048
        • C:\Users\Admin\AppData\Local\Temp\is-FKRBT.tmp\Fri05eeb2dae7b88520a.tmp
          "C:\Users\Admin\AppData\Local\Temp\is-FKRBT.tmp\Fri05eeb2dae7b88520a.tmp" /SL5="$30100,140785,56832,C:\Users\Admin\AppData\Local\Temp\Fri05eeb2dae7b88520a.exe" /SILENT
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Drops file in Program Files directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of WriteProcessMemory
          PID:3600
          • C:\Users\Admin\AppData\Local\Temp\is-PO3MF.tmp\postback.exe
            "C:\Users\Admin\AppData\Local\Temp\is-PO3MF.tmp\postback.exe" ss1
            5⤵
            • Executes dropped EXE
            PID:2372
  • C:\Windows\System32\WaaSMedicAgent.exe
    C:\Windows\System32\WaaSMedicAgent.exe ca621dcc81695e022123aa6437674625 MHXrxKieNk+i58qpxUc4zw.0.1.0.3.0
    1⤵
    • Modifies data under HKEY_USERS
    • Suspicious use of AdjustPrivilegeToken
    PID:948
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Suspicious use of AdjustPrivilegeToken
    PID:1976
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k netsvcs -p -s UsoSvc
    1⤵
    • Checks processor information in registry
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1588
    • C:\Windows\uus\AMD64\MoUsoCoreWorker.exe
      C:\Windows\uus\AMD64\MoUsoCoreWorker.exe
      2⤵
        PID:1900
      • C:\Windows\uus\AMD64\MoUsoCoreWorker.exe
        C:\Windows\uus\AMD64\MoUsoCoreWorker.exe
        2⤵
          PID:1336
      • C:\Windows\System32\WaaSMedicAgent.exe
        C:\Windows\System32\WaaSMedicAgent.exe ca621dcc81695e022123aa6437674625 MHXrxKieNk+i58qpxUc4zw.0.1.0.3.0
        1⤵
        • Modifies data under HKEY_USERS
        PID:2856

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      Registry Run Keys / Startup Folder

      1
      T1060

      Defense Evasion

      Modify Registry

      1
      T1112

      Discovery

      Query Registry

      2
      T1012

      System Information Discovery

      2
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\is-FKRBT.tmp\Fri05eeb2dae7b88520a.tmp
        MD5

        9303156631ee2436db23827e27337be4

        SHA1

        018e0d5b6ccf7000e36af30cebeb8adc5667e5fa

        SHA256

        bae22f27c12bce1faeb64b6eb733302aff5867baa8eed832397a7ce284a86ff4

        SHA512

        9fe100fafb1c74728109667b5a2261a31e49c45723de748adaa1d9cb9f8daa389b871056c70066fa3a05be82a5017c8dd590ae149a56d824a9e250d31091a40f

      • C:\Users\Admin\AppData\Local\Temp\is-FKRBT.tmp\Fri05eeb2dae7b88520a.tmp
        MD5

        9303156631ee2436db23827e27337be4

        SHA1

        018e0d5b6ccf7000e36af30cebeb8adc5667e5fa

        SHA256

        bae22f27c12bce1faeb64b6eb733302aff5867baa8eed832397a7ce284a86ff4

        SHA512

        9fe100fafb1c74728109667b5a2261a31e49c45723de748adaa1d9cb9f8daa389b871056c70066fa3a05be82a5017c8dd590ae149a56d824a9e250d31091a40f

      • C:\Users\Admin\AppData\Local\Temp\is-JFL48.tmp\idp.dll
        MD5

        b37377d34c8262a90ff95a9a92b65ed8

        SHA1

        faeef415bd0bc2a08cf9fe1e987007bf28e7218d

        SHA256

        e5a0ad2e37dde043a0dd4ad7634961ff3f0d70e87d2db49761eb4c1f468bb02f

        SHA512

        69d8da5b45d9b4b996d32328d3402fa37a3d710564d47c474bf9e15c1e45bc15b2858dbab446e6baec0c099d99007ff1099e9c4e66cfd1597f28c420bb50fdcc

      • C:\Users\Admin\AppData\Local\Temp\is-PO3MF.tmp\idp.dll
        MD5

        b37377d34c8262a90ff95a9a92b65ed8

        SHA1

        faeef415bd0bc2a08cf9fe1e987007bf28e7218d

        SHA256

        e5a0ad2e37dde043a0dd4ad7634961ff3f0d70e87d2db49761eb4c1f468bb02f

        SHA512

        69d8da5b45d9b4b996d32328d3402fa37a3d710564d47c474bf9e15c1e45bc15b2858dbab446e6baec0c099d99007ff1099e9c4e66cfd1597f28c420bb50fdcc

      • C:\Users\Admin\AppData\Local\Temp\is-PO3MF.tmp\postback.exe
        MD5

        b3bb91ad96f2d4c041861ce59ba6ac73

        SHA1

        e18c6fd6a0d0d5c124c9ef6972a76c47c28c80a3

        SHA256

        0581160998be30f79bd9a0925a01b0ebc4cb94265dfa7f8da1e2839bf0f1e426

        SHA512

        e3a8426d202a8aad79aad5d75549753cf70b9c2c0fa4c9468f03d089eca8e529b56cd8fa16b7be3a4cfc019d43ff458b9dc8a1cae44b6ed75e27f21489a2cbdd

      • C:\Users\Admin\AppData\Local\Temp\is-PO3MF.tmp\postback.exe
        MD5

        b3bb91ad96f2d4c041861ce59ba6ac73

        SHA1

        e18c6fd6a0d0d5c124c9ef6972a76c47c28c80a3

        SHA256

        0581160998be30f79bd9a0925a01b0ebc4cb94265dfa7f8da1e2839bf0f1e426

        SHA512

        e3a8426d202a8aad79aad5d75549753cf70b9c2c0fa4c9468f03d089eca8e529b56cd8fa16b7be3a4cfc019d43ff458b9dc8a1cae44b6ed75e27f21489a2cbdd

      • C:\Users\Admin\AppData\Local\Temp\is-SH86D.tmp\Fri05eeb2dae7b88520a.tmp
        MD5

        9303156631ee2436db23827e27337be4

        SHA1

        018e0d5b6ccf7000e36af30cebeb8adc5667e5fa

        SHA256

        bae22f27c12bce1faeb64b6eb733302aff5867baa8eed832397a7ce284a86ff4

        SHA512

        9fe100fafb1c74728109667b5a2261a31e49c45723de748adaa1d9cb9f8daa389b871056c70066fa3a05be82a5017c8dd590ae149a56d824a9e250d31091a40f

      • C:\Users\Admin\AppData\Local\Temp\is-SH86D.tmp\Fri05eeb2dae7b88520a.tmp
        MD5

        9303156631ee2436db23827e27337be4

        SHA1

        018e0d5b6ccf7000e36af30cebeb8adc5667e5fa

        SHA256

        bae22f27c12bce1faeb64b6eb733302aff5867baa8eed832397a7ce284a86ff4

        SHA512

        9fe100fafb1c74728109667b5a2261a31e49c45723de748adaa1d9cb9f8daa389b871056c70066fa3a05be82a5017c8dd590ae149a56d824a9e250d31091a40f

      • memory/1284-152-0x00000000022F0000-0x00000000022F1000-memory.dmp
        Filesize

        4KB

      • memory/1284-147-0x0000000000000000-mapping.dmp
      • memory/1336-168-0x0000000000000000-mapping.dmp
      • memory/1900-164-0x0000000000000000-mapping.dmp
      • memory/1976-155-0x0000021E635A0000-0x0000021E635A4000-memory.dmp
        Filesize

        16KB

      • memory/1976-169-0x0000021E635C0000-0x0000021E635C4000-memory.dmp
        Filesize

        16KB

      • memory/1976-170-0x0000021E634E0000-0x0000021E634E1000-memory.dmp
        Filesize

        4KB

      • memory/1976-172-0x0000021E634A0000-0x0000021E634A1000-memory.dmp
        Filesize

        4KB

      • memory/1976-154-0x0000021E60EA0000-0x0000021E60EB0000-memory.dmp
        Filesize

        64KB

      • memory/1976-153-0x0000021E60E20000-0x0000021E60E30000-memory.dmp
        Filesize

        64KB

      • memory/2372-165-0x0000000000000000-mapping.dmp
      • memory/3048-158-0x0000000000400000-0x0000000000414000-memory.dmp
        Filesize

        80KB

      • memory/3048-156-0x0000000000000000-mapping.dmp
      • memory/3600-163-0x00000000022E0000-0x00000000022E1000-memory.dmp
        Filesize

        4KB

      • memory/3600-159-0x0000000000000000-mapping.dmp
      • memory/4160-151-0x0000000000400000-0x0000000000414000-memory.dmp
        Filesize

        80KB