Resubmissions

02-08-2024 21:46

240802-1m17mswere 10

Analysis

  • max time kernel
    15s
  • max time network
    17s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    02-08-2024 21:46

General

  • Target

    Loader.exe

  • Size

    80.8MB

  • MD5

    93e39aca43080a3a84a6e7a492b586a7

  • SHA1

    eee096dcfba81e22bd3422243fef9705e0d9cd9c

  • SHA256

    6fdf6a1447279d9126829e279c7153d13c4e34312d5b74b1a66791f78535bac7

  • SHA512

    e6f4b383d76f640cc6f5c59367af3719bd13c8cb609dfc511561eef7813fae62d640c8e24b4f4fc0c8242d9efed4a2e02244309be37f1ddd71a6f464a12714d7

  • SSDEEP

    1572864:NFh7vHcRltSk8IpG7V+VPhqYdfME7FFlHFziYweyJulZUdgAdW47jzux3a/Z9U:3h7vHcRLSkB05awcfhdCpukdRna49U

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs
  • Checks BIOS information in registry 2 TTPs 4 IoCs

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

  • Loads dropped DLL 7 IoCs
  • Themida packer 11 IoCs

    Detects Themida, an advanced Windows software protection system.

  • UPX packed file 1 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Loader.exe
    "C:\Users\Admin\AppData\Local\Temp\Loader.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of WriteProcessMemory
    PID:2112
    • C:\Users\Admin\AppData\Local\Temp\Loader.exe
      "C:\Users\Admin\AppData\Local\Temp\Loader.exe"
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Checks BIOS information in registry
      • Loads dropped DLL
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      PID:1648
  • C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    1⤵
      PID:2388

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\_MEI21122\python312.dll

      Filesize

      1.7MB

      MD5

      506c760a20e6bb940590229d41449ffa

      SHA1

      b7c439f253987fb0ff66fc5ce959cf711b18eb8d

      SHA256

      e63503b2715df3eab8abb9b2682129e27a7add9acea9008f06f55494a2b2f3d5

      SHA512

      34df2e8e53caac0cd72cb3c5848296ca8cfa10c542c0a5f88385d6b35ab70b86957540de2ff105a27cefb37ccbb5789261a69132b535a857df32875c1f9deb9e

    • C:\Users\Admin\AppData\Local\Temp\_MEI21122\ucrtbase.dll

      Filesize

      992KB

      MD5

      0e0bac3d1dcc1833eae4e3e4cf83c4ef

      SHA1

      4189f4459c54e69c6d3155a82524bda7549a75a6

      SHA256

      8a91052ef261b5fbf3223ae9ce789af73dfe1e9b0ba5bdbc4d564870a24f2bae

      SHA512

      a45946e3971816f66dd7ea3788aacc384a9e95011500b458212dc104741315b85659e0d56a41570731d338bdf182141c093d3ced222c007038583ceb808e26fd

    • \Users\Admin\AppData\Local\Temp\_MEI21122\api-ms-win-core-file-l1-2-0.dll

      Filesize

      21KB

      MD5

      1c58526d681efe507deb8f1935c75487

      SHA1

      0e6d328faf3563f2aae029bc5f2272fb7a742672

      SHA256

      ef13dce8f71173315dfc64ab839b033ab19a968ee15230e9d4d2c9d558efeee2

      SHA512

      8edb9a0022f417648e2ece9e22c96e2727976332025c3e7d8f15bcf6d7d97e680d1bf008eb28e2e0bd57787dcbb71d38b2deb995b8edc35fa6852ab1d593f3d1

    • \Users\Admin\AppData\Local\Temp\_MEI21122\api-ms-win-core-file-l2-1-0.dll

      Filesize

      18KB

      MD5

      bfffa7117fd9b1622c66d949bac3f1d7

      SHA1

      402b7b8f8dcfd321b1d12fc85a1ee5137a5569b2

      SHA256

      1ea267a2e6284f17dd548c6f2285e19f7edb15d6e737a55391140ce5cb95225e

      SHA512

      b319cc7b436b1be165cdf6ffcab8a87fe29de78f7e0b14c8f562be160481fb5483289bd5956fdc1d8660da7a3f86d8eede35c6cc2b7c3d4c852decf4b2dcdb7f

    • \Users\Admin\AppData\Local\Temp\_MEI21122\api-ms-win-core-localization-l1-2-0.dll

      Filesize

      21KB

      MD5

      724223109e49cb01d61d63a8be926b8f

      SHA1

      072a4d01e01dbbab7281d9bd3add76f9a3c8b23b

      SHA256

      4e975f618df01a492ae433dff0dd713774d47568e44c377ceef9e5b34aad1210

      SHA512

      19b0065b894dc66c30a602c9464f118e7f84d83010e74457d48e93aaca4422812b093b15247b24d5c398b42ef0319108700543d13f156067b169ccfb4d7b6b7c

    • \Users\Admin\AppData\Local\Temp\_MEI21122\api-ms-win-core-processthreads-l1-1-1.dll

      Filesize

      21KB

      MD5

      517eb9e2cb671ae49f99173d7f7ce43f

      SHA1

      4ccf38fed56166ddbf0b7efb4f5314c1f7d3b7ab

      SHA256

      57cc66bf0909c430364d35d92b64eb8b6a15dc201765403725fe323f39e8ac54

      SHA512

      492be2445b10f6bfe6c561c1fc6f5d1af6d1365b7449bc57a8f073b44ae49c88e66841f5c258b041547fcd33cbdcb4eb9dd3e24f0924db32720e51651e9286be

    • \Users\Admin\AppData\Local\Temp\_MEI21122\api-ms-win-core-timezone-l1-1-0.dll

      Filesize

      21KB

      MD5

      d12403ee11359259ba2b0706e5e5111c

      SHA1

      03cc7827a30fd1dee38665c0cc993b4b533ac138

      SHA256

      f60e1751a6ac41f08e46480bf8e6521b41e2e427803996b32bdc5e78e9560781

      SHA512

      9004f4e59835af57f02e8d9625814db56f0e4a98467041da6f1367ef32366ad96e0338d48fff7cc65839a24148e2d9989883bcddc329d9f4d27cae3f843117d0

    • memory/1648-1300-0x0000000140000000-0x00000001409BE000-memory.dmp

      Filesize

      9.7MB

    • memory/1648-1317-0x000007FEF5D30000-0x000007FEF63F4000-memory.dmp

      Filesize

      6.8MB

    • memory/1648-1302-0x0000000140000000-0x00000001409BE000-memory.dmp

      Filesize

      9.7MB

    • memory/1648-1320-0x0000000077BA0000-0x0000000077D49000-memory.dmp

      Filesize

      1.7MB

    • memory/1648-1298-0x0000000140000000-0x00000001409BE000-memory.dmp

      Filesize

      9.7MB

    • memory/1648-1299-0x0000000077BA0000-0x0000000077D49000-memory.dmp

      Filesize

      1.7MB

    • memory/1648-1319-0x0000000140000000-0x00000001409BE000-memory.dmp

      Filesize

      9.7MB

    • memory/1648-1301-0x0000000140000000-0x00000001409BE000-memory.dmp

      Filesize

      9.7MB

    • memory/2112-4-0x0000000140000000-0x00000001409BE000-memory.dmp

      Filesize

      9.7MB

    • memory/2112-3-0x0000000140000000-0x00000001409BE000-memory.dmp

      Filesize

      9.7MB

    • memory/2112-1-0x0000000077BF0000-0x0000000077BF2000-memory.dmp

      Filesize

      8KB

    • memory/2112-2-0x0000000140000000-0x00000001409BE000-memory.dmp

      Filesize

      9.7MB

    • memory/2112-1318-0x0000000140000000-0x00000001409BE000-memory.dmp

      Filesize

      9.7MB

    • memory/2112-1297-0x00000000024F0000-0x0000000002EAE000-memory.dmp

      Filesize

      9.7MB

    • memory/2112-0-0x0000000140000000-0x00000001409BE000-memory.dmp

      Filesize

      9.7MB

    • memory/2112-2606-0x0000000140000000-0x00000001409BE000-memory.dmp

      Filesize

      9.7MB