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Resubmissions

23/07/2024, 16:30

240723-tzsbyaygkk 9

23/07/2024, 16:28

240723-tyygkasajd 9

Analysis

  • max time kernel
    149s
  • max time network
    138s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240704-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/07/2024, 16:28

General

  • Target

    SolaraBootstrapper.exe

  • Size

    13KB

  • MD5

    0cc81729f4bd4a6eac95cc442bc8df2a

  • SHA1

    5d5f367e720684dd64cfb5340d9911ec0782fdac

  • SHA256

    92960ae4a38d896418a14a1db5ba1547aa273443790e858d00dac4ce64550c2a

  • SHA512

    f6fc1fca47e4620e24652d8dc2aa88cdd7363172b31122c05d262349aeec88407a2b3fbbc4e4834c359960d4981fb9f674cfbfd9d5743dc917df72a3ebfb3c90

  • SSDEEP

    192:+ZnqvqiVx1BLO77IaqaLHmr/XKTxnTjw1hOPVXmNjA:0nCVxoIaqayzKtnw1h6VKj

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 5 IoCs
  • Themida packer 3 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 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 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe
    "C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3476
    • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe
      "C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe"
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Checks BIOS information in registry
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2664

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Microsoft.Web.WebView2.Core.dll

    Filesize

    488KB

    MD5

    851fee9a41856b588847cf8272645f58

    SHA1

    ee185a1ff257c86eb19d30a191bf0695d5ac72a1

    SHA256

    5e7faee6b8230ca3b97ce9542b914db3abbbd1cb14fd95a39497aaad4c1094ca

    SHA512

    cf5c70984cf33e12cf57116da1f282a5bd6433c570831c185253d13463b0b9a0b9387d4d1bf4dddab3292a5d9ba96d66b6812e9d7ebc5eb35cb96eea2741348f

  • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Microsoft.Web.WebView2.Wpf.dll

    Filesize

    43KB

    MD5

    34ec990ed346ec6a4f14841b12280c20

    SHA1

    6587164274a1ae7f47bdb9d71d066b83241576f0

    SHA256

    1e987b22cd011e4396a0805c73539586b67df172df75e3dded16a77d31850409

    SHA512

    b565015ca4b11b79ecbc8127f1fd40c986948050f1caefdd371d34ed2136af0aabf100863dc6fd16d67e3751d44ee13835ea9bf981ac0238165749c4987d1ae0

  • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Newtonsoft.Json.dll

    Filesize

    695KB

    MD5

    195ffb7167db3219b217c4fd439eedd6

    SHA1

    1e76e6099570ede620b76ed47cf8d03a936d49f8

    SHA256

    e1e27af7b07eeedf5ce71a9255f0422816a6fc5849a483c6714e1b472044fa9d

    SHA512

    56eb7f070929b239642dab729537dde2c2287bdb852ad9e80b5358c74b14bc2b2dded910d0e3b6304ea27eb587e5f19db0a92e1cbae6a70fb20b4ef05057e4ac

  • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\VCRUNTIME140.dll

    Filesize

    99KB

    MD5

    7a2b8cfcd543f6e4ebca43162b67d610

    SHA1

    c1c45a326249bf0ccd2be2fbd412f1a62fb67024

    SHA256

    7d7ca28235fba5603a7f40514a552ac7efaa67a5d5792bb06273916aa8565c5f

    SHA512

    e38304fb9c5af855c1134f542adf72cde159fab64385533eafa5bb6e374f19b5a29c0cb5516fc5da5c0b5ac47c2f6420792e0ac8ddff11e749832a7b7f3eb5c8

  • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\WebView2Loader.dll

    Filesize

    133KB

    MD5

    a0bd0d1a66e7c7f1d97aedecdafb933f

    SHA1

    dd109ac34beb8289030e4ec0a026297b793f64a3

    SHA256

    79d7e45f8631e8d2541d01bfb5a49a3a090be72b3d465389a2d684680fee2e36

    SHA512

    2a50ae5c7234a44b29f82ebc2e3cfed37bf69294eb00b2dc8905c61259975b2f3a059c67aeab862f002752454d195f7191d9b82b056f6ef22d6e1b0bb3673d50

  • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Wpf.Ui.dll

    Filesize

    5.2MB

    MD5

    aead90ab96e2853f59be27c4ec1e4853

    SHA1

    43cdedde26488d3209e17efff9a51e1f944eb35f

    SHA256

    46cfbe804b29c500ebc0b39372e64c4c8b4f7a8e9b220b5f26a9adf42fcb2aed

    SHA512

    f5044f2ee63906287460b9adabfcf3c93c60b51c86549e33474c4d7f81c4f86cd03cd611df94de31804c53006977874b8deb67c4bf9ea1c2b70c459b3a44b38d

  • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\bin\path.txt

    Filesize

    34B

    MD5

    0e2184f1c7464b6617329fb18f107b4f

    SHA1

    6f22f98471e33c9db10d6f6f1728e98852e25b8f

    SHA256

    dbf5f44e1b84a298dbbcad3c31a617d2f6cfa08eb5d16e05a5c28726c574d4eb

    SHA512

    8e745c0215d52e15702551f29efb882a5eba97b5f279ccc29293b1a9b1b8661bf71b548569f9a99fa35c35a15d1b6b288d3c381c1292418c36dc89e2fa0b3a37

  • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.dll

    Filesize

    4.1MB

    MD5

    4d326696ffd80a5bee016c8b397442c2

    SHA1

    fe6f4d206a60928daab413db4c7be663c04c097c

    SHA256

    db03b4536fbfdcb570945f5942546a19afe20a7826713bf12f34347ee618f2ca

    SHA512

    5136cb9a0d00492db1ed77c978376ee39763e9ae5a00e8bd36ee200c2cae1314b036887a142f503b2d1a8fa32b76065aa200497f1d4efee2407aa00f7aa8e09a

  • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe

    Filesize

    90KB

    MD5

    d84e7f79f4f0d7074802d2d6e6f3579e

    SHA1

    494937256229ef022ff05855c3d410ac3e7df721

    SHA256

    dcfc2b4fa3185df415855ec54395d9c36612f68100d046d8c69659da01f7d227

    SHA512

    ed7b0ac098c8184b611b83158eaa86619001e74dba079d398b34ac694ce404ba133c2baf43051840132d6a3a089a375550072543b9fab2549d57320d13502260

  • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\libcurl.dll

    Filesize

    522KB

    MD5

    e31f5136d91bad0fcbce053aac798a30

    SHA1

    ee785d2546aec4803bcae08cdebfd5d168c42337

    SHA256

    ee94e2201870536522047e6d7fe7b903a63cd2e13e20c8fffc86d0e95361e671

    SHA512

    a1543eb1d10d25efb44f9eaa0673c82bfac5173055d04c0f3be4792984635a7c774df57a8e289f840627754a4e595b855d299070d469e0f1e637c3f35274abe6

  • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\zlib1.dll

    Filesize

    113KB

    MD5

    75365924730b0b2c1a6ee9028ef07685

    SHA1

    a10687c37deb2ce5422140b541a64ac15534250f

    SHA256

    945e7f5d09938b7769a4e68f4ef01406e5af9f40db952cba05ddb3431dd1911b

    SHA512

    c1e31c18903e657203ae847c9af601b1eb38efa95cb5fa7c1b75f84a2cba9023d08f1315c9bb2d59b53256dfdb3bac89930252138475491b21749471adc129a1

  • memory/2664-431-0x0000028F7FF50000-0x0000028F7FF5E000-memory.dmp

    Filesize

    56KB

  • memory/2664-433-0x0000028F80200000-0x0000028F8027E000-memory.dmp

    Filesize

    504KB

  • memory/2664-424-0x0000028F80540000-0x0000028F80A7C000-memory.dmp

    Filesize

    5.2MB

  • memory/2664-427-0x0000028F800C0000-0x0000028F80172000-memory.dmp

    Filesize

    712KB

  • memory/2664-428-0x00007FFC169A0000-0x00007FFC17461000-memory.dmp

    Filesize

    10.8MB

  • memory/2664-429-0x0000028F7FF80000-0x0000028F7FFA2000-memory.dmp

    Filesize

    136KB

  • memory/2664-423-0x00007FFC169A0000-0x00007FFC17461000-memory.dmp

    Filesize

    10.8MB

  • memory/2664-425-0x0000028F80000000-0x0000028F800BA000-memory.dmp

    Filesize

    744KB

  • memory/2664-421-0x0000028F7D910000-0x0000028F7D92A000-memory.dmp

    Filesize

    104KB

  • memory/2664-449-0x0000028F80180000-0x0000028F801B8000-memory.dmp

    Filesize

    224KB

  • memory/2664-455-0x0000000180000000-0x0000000180AE1000-memory.dmp

    Filesize

    10.9MB

  • memory/2664-419-0x00007FFC169A3000-0x00007FFC169A5000-memory.dmp

    Filesize

    8KB

  • memory/2664-454-0x00007FFC169A0000-0x00007FFC17461000-memory.dmp

    Filesize

    10.8MB

  • memory/2664-453-0x00007FFC169A0000-0x00007FFC17461000-memory.dmp

    Filesize

    10.8MB

  • memory/2664-452-0x00007FFC169A0000-0x00007FFC17461000-memory.dmp

    Filesize

    10.8MB

  • memory/2664-444-0x00007FFC169A0000-0x00007FFC17461000-memory.dmp

    Filesize

    10.8MB

  • memory/2664-445-0x0000000180000000-0x0000000180AE1000-memory.dmp

    Filesize

    10.9MB

  • memory/2664-451-0x00007FFC169A3000-0x00007FFC169A5000-memory.dmp

    Filesize

    8KB

  • memory/2664-448-0x0000028F7FF60000-0x0000028F7FF68000-memory.dmp

    Filesize

    32KB

  • memory/2664-450-0x0000028F7FF70000-0x0000028F7FF7E000-memory.dmp

    Filesize

    56KB

  • memory/3476-0-0x00000000743DE000-0x00000000743DF000-memory.dmp

    Filesize

    4KB

  • memory/3476-1-0x0000000000B40000-0x0000000000B4A000-memory.dmp

    Filesize

    40KB

  • memory/3476-2-0x0000000005410000-0x000000000541A000-memory.dmp

    Filesize

    40KB

  • memory/3476-3-0x00000000743D0000-0x0000000074B80000-memory.dmp

    Filesize

    7.7MB

  • memory/3476-5-0x0000000005F10000-0x0000000005F22000-memory.dmp

    Filesize

    72KB

  • memory/3476-420-0x00000000743D0000-0x0000000074B80000-memory.dmp

    Filesize

    7.7MB