Analysis

  • max time kernel
    28s
  • max time network
    23s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    01-07-2024 14:49

General

  • Target

    Solara.exe

  • Size

    707KB

  • MD5

    890aefe0eb8cac48c07f1b8c32b40c52

  • SHA1

    354100304c1eedfea760b85804f79995cd558e39

  • SHA256

    9fb5c80c2a1e3d90dfd12b92fe46d1971c19c25f4e9094b6a911636b53c06281

  • SHA512

    d4831595f132738558cfc9d2e11e51c7eb68e4ae3b6ce0d81dee506ca5e856f4970cdbd9a15fc9ac0ecb74ed63b1752c2f576a130e1ec1fcdfeeb11330d580c5

  • SSDEEP

    12288:fCQjgAtAHM+vetZxF5EWry8AJGy0yR1Bjy1hbpyPeVo0Wx1Lk:f5ZWs+OZVEWry8AFfrjy1hVyPeVolrLk

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1251812743405895720/XbVTvqdGOOjadCOCInc1DelKACOZUrVTE090_g72gm3le9ZWZGqoLmCCp_mx-rpg0aRM

Signatures

  • Detect Umbral payload 2 IoCs
  • Umbral

    Umbral stealer is an opensource moduler stealer written in C#.

  • 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.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 5 IoCs
  • Themida packer 6 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).

  • Suspicious behavior: EnumeratesProcesses 13 IoCs
  • Suspicious use of AdjustPrivilegeToken 45 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Solara.exe
    "C:\Users\Admin\AppData\Local\Temp\Solara.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:596
    • C:\Users\Admin\AppData\Local\Temp\SoIaraBootstrapper.exe
      "C:\Users\Admin\AppData\Local\Temp\SoIaraBootstrapper.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1256
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1952
    • C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe
      "C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3900
      • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe
        "C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe"
        3⤵
        • 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:4860

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\SoIaraBootstrapper.exe

    Filesize

    227KB

    MD5

    c4256ec1eed03d809035bbd044aa0f19

    SHA1

    a0b69231eb481436b51bb78605e93dcdf5d986d0

    SHA256

    b4914acc9d1e0cc61549d3c21f290369eea0e9a205ea7ce465b221ae3ef409d4

    SHA512

    41cfb128462ef590fac4ed44bc1df187f51fb46353579c718bb2e361d97b06a02a970bbe959898b21a2133a7c1732dfe912e0dca8c3d4d3608b15469258006b1

  • 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.WinForms.dll

    Filesize

    37KB

    MD5

    4cf94ffa50fd9bdc0bb93cceaede0629

    SHA1

    3e30eca720f4c2a708ec53fd7f1ba9e778b4f95f

    SHA256

    50b2e46c99076f6fa9c33e0a98f0fe3a2809a7c647bb509066e58f4c7685d7e6

    SHA512

    dc400518ef2f68920d90f1ce66fbb8f4dde2294e0efeecd3d9329aa7a66e1ab53487b120e13e15f227ea51784f90208c72d7fbfa9330d9b71dd9a1a727d11f98

  • 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\Monaco\fileaccess\node_modules\get-intrinsic\.nycrc

    Filesize

    139B

    MD5

    d0104f79f0b4f03bbcd3b287fa04cf8c

    SHA1

    54f9d7adf8943cb07f821435bb269eb4ba40ccc2

    SHA256

    997785c50b0773e5e18bf15550fbf57823c634fefe623cd37b3c83696402ad0a

    SHA512

    daf9b5445cfc02397f398adfa0258f2489b70699dfec6ca7e5b85afe5671fdcabe59edee332f718f5e5778feb1e301778dffe93bb28c1c0914f669659bad39c6

  • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Monaco\fileaccess\node_modules\has-proto\.eslintrc

    Filesize

    43B

    MD5

    c28b0fe9be6e306cc2ad30fe00e3db10

    SHA1

    af79c81bd61c9a937fca18425dd84cdf8317c8b9

    SHA256

    0694050195fc694c5846b0a2a66b437ac775da988f0a779c55fb892597f7f641

    SHA512

    e3eca17804522ffa4f41e836e76e397a310a20e8261a38115b67e8b644444153039d04198fb470f45be2997d2c7a72b15bd4771a02c741b3cbc072ea6ef432e9

  • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Monaco\fileaccess\node_modules\hasown\.nycrc

    Filesize

    216B

    MD5

    c2ab942102236f987048d0d84d73d960

    SHA1

    95462172699187ac02eaec6074024b26e6d71cff

    SHA256

    948366fea3b423a46366326d0bb2e54b08abd1cf0b243678ba6625740c40da5a

    SHA512

    e36b20c16ceeb090750f3865efc8d7fd983ae4e8b41c30cc3865d2fd4925bf5902627e1f1ed46c0ff2453f076ef9de34be899ef57754b29cd158440071318479

  • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Monaco\fileaccess\node_modules\vary\LICENSE

    Filesize

    1KB

    MD5

    13babc4f212ce635d68da544339c962b

    SHA1

    4881ad2ec8eb2470a7049421047c6d076f48f1de

    SHA256

    bd47ce7b88c7759630d1e2b9fcfa170a0f1fde522be09e13fb1581a79d090400

    SHA512

    40e30174433408e0e2ed46d24373b12def47f545d9183b7bce28d4ddd8c8bb528075c7f20e118f37661db9f1bba358999d81a14425eb3e0a4a20865dfcb53182

  • 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.exe

    Filesize

    90KB

    MD5

    d84e7f79f4f0d7074802d2d6e6f3579e

    SHA1

    494937256229ef022ff05855c3d410ac3e7df721

    SHA256

    dcfc2b4fa3185df415855ec54395d9c36612f68100d046d8c69659da01f7d227

    SHA512

    ed7b0ac098c8184b611b83158eaa86619001e74dba079d398b34ac694ce404ba133c2baf43051840132d6a3a089a375550072543b9fab2549d57320d13502260

  • C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe

    Filesize

    13KB

    MD5

    6557bd5240397f026e675afb78544a26

    SHA1

    839e683bf68703d373b6eac246f19386bb181713

    SHA256

    a7fecfc225dfdd4e14dcd4d1b4ba1b9f8e4d1984f1cdd8cda3a9987e5d53c239

    SHA512

    f2399d34898a4c0c201372d2dd084ee66a66a1c3eae949e568421fe7edada697468ef81f4fcab2afd61eaf97bcb98d6ade2d97295e2f674e93116d142e892e97

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

    Filesize

    4.2MB

    MD5

    f71b342220b8f8935abe5ea0b1e5f30c

    SHA1

    a70d41dbc456d548e790af717575b1f83e3f38b5

    SHA256

    dec8c51c89452b183201e58e4cfceffb0924c4c1f7729841a739086711ff021f

    SHA512

    d6ba2d0eecb2bd70ea727c7bd86cce75fe535e4a7688eb6fc6334e30f568d24d0b6661b8873ddb88c1bb75dbf772fae215b101545ff85e6461a2b05b85dfe05f

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

    Filesize

    522KB

    MD5

    e31f5136d91bad0fcbce053aac798a30

    SHA1

    ee785d2546aec4803bcae08cdebfd5d168c42337

    SHA256

    ee94e2201870536522047e6d7fe7b903a63cd2e13e20c8fffc86d0e95361e671

    SHA512

    a1543eb1d10d25efb44f9eaa0673c82bfac5173055d04c0f3be4792984635a7c774df57a8e289f840627754a4e595b855d299070d469e0f1e637c3f35274abe6

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

    Filesize

    113KB

    MD5

    75365924730b0b2c1a6ee9028ef07685

    SHA1

    a10687c37deb2ce5422140b541a64ac15534250f

    SHA256

    945e7f5d09938b7769a4e68f4ef01406e5af9f40db952cba05ddb3431dd1911b

    SHA512

    c1e31c18903e657203ae847c9af601b1eb38efa95cb5fa7c1b75f84a2cba9023d08f1315c9bb2d59b53256dfdb3bac89930252138475491b21749471adc129a1

  • memory/1256-13-0x000001BB1CA30000-0x000001BB1CA70000-memory.dmp

    Filesize

    256KB

  • memory/1256-11-0x00007FFA675E3000-0x00007FFA675E4000-memory.dmp

    Filesize

    4KB

  • memory/3900-20-0x0000000005940000-0x0000000005952000-memory.dmp

    Filesize

    72KB

  • memory/3900-16-0x0000000000690000-0x000000000069A000-memory.dmp

    Filesize

    40KB

  • memory/3900-17-0x00000000028A0000-0x00000000028AA000-memory.dmp

    Filesize

    40KB

  • memory/4860-1474-0x000002496C100000-0x000002496C63C000-memory.dmp

    Filesize

    5.2MB

  • memory/4860-1494-0x0000000180000000-0x0000000180B0D000-memory.dmp

    Filesize

    11.1MB

  • memory/4860-1478-0x000002496C670000-0x000002496C692000-memory.dmp

    Filesize

    136KB

  • memory/4860-1475-0x000002496BE40000-0x000002496BEF8000-memory.dmp

    Filesize

    736KB

  • memory/4860-1482-0x000002496CA20000-0x000002496CA9E000-memory.dmp

    Filesize

    504KB

  • memory/4860-1493-0x0000000180000000-0x0000000180B0D000-memory.dmp

    Filesize

    11.1MB

  • memory/4860-1495-0x0000000180000000-0x0000000180B0D000-memory.dmp

    Filesize

    11.1MB

  • memory/4860-1472-0x0000024969760000-0x000002496977A000-memory.dmp

    Filesize

    104KB

  • memory/4860-1496-0x0000000180000000-0x0000000180B0D000-memory.dmp

    Filesize

    11.1MB

  • memory/4860-1480-0x000002496C0F0000-0x000002496C0FE000-memory.dmp

    Filesize

    56KB

  • memory/4860-1477-0x000002496BF00000-0x000002496BFB2000-memory.dmp

    Filesize

    712KB

  • memory/4860-1500-0x0000024970CA0000-0x0000024970CA8000-memory.dmp

    Filesize

    32KB

  • memory/4860-1501-0x0000024970E90000-0x0000024970EC8000-memory.dmp

    Filesize

    224KB

  • memory/4860-1503-0x00007FFA766A0000-0x00007FFA766C4000-memory.dmp

    Filesize

    144KB

  • memory/4860-1502-0x0000000180000000-0x0000000180B0D000-memory.dmp

    Filesize

    11.1MB