Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-12-2024 01:28

General

  • Target

    JaffaCakes118_1972daa7b5cc048abec1c5e6f802b05707e2b5025af43913f16ebba7c1a7e294.exe

  • Size

    263KB

  • MD5

    5659f39ef371145b3d22f748cfa56f3e

  • SHA1

    e215ff11440c44b44e948bbc54a254687404fe5d

  • SHA256

    1972daa7b5cc048abec1c5e6f802b05707e2b5025af43913f16ebba7c1a7e294

  • SHA512

    3c2d1b3dad5c5657dc93485e46e929a86541225fd7c63c2f1b0df5b9c745c9d6cea9d9b78959d2d59e65018714229900070305d7e8fab270c5a16d0fc190cfbd

  • SSDEEP

    6144:1dWb9Di3mz70r6uIdSP3PGUt/YnZiTeyqnhl2adcPdno:/Ug2cuuIdSP3PGoYhhMaWd

Malware Config

Extracted

Family

tofsee

C2

niflheimr.cn

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Tofsee family
  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe 3 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Program crash 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1972daa7b5cc048abec1c5e6f802b05707e2b5025af43913f16ebba7c1a7e294.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1972daa7b5cc048abec1c5e6f802b05707e2b5025af43913f16ebba7c1a7e294.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3220
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iuhqqrxg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2340
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\guprqlqu.exe" C:\Windows\SysWOW64\iuhqqrxg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1812
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create iuhqqrxg binPath= "C:\Windows\SysWOW64\iuhqqrxg\guprqlqu.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1972daa7b5cc048abec1c5e6f802b05707e2b5025af43913f16ebba7c1a7e294.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2972
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description iuhqqrxg "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3092
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start iuhqqrxg
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3224
    • C:\Windows\SysWOW64\netsh.exe
      "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
      2⤵
      • Modifies Windows Firewall
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:2788
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3220 -s 1036
      2⤵
      • Program crash
      PID:3840
  • C:\Windows\SysWOW64\iuhqqrxg\guprqlqu.exe
    C:\Windows\SysWOW64\iuhqqrxg\guprqlqu.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1972daa7b5cc048abec1c5e6f802b05707e2b5025af43913f16ebba7c1a7e294.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1608
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:672
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1608 -s 528
      2⤵
      • Program crash
      PID:3684
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3220 -ip 3220
    1⤵
      PID:3932
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 1608 -ip 1608
      1⤵
        PID:3668

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        12.4MB

        MD5

        c384f24397e7ae92d7d6d68b4456feb2

        SHA1

        cf0917529daceba2874298bdc8e5dd9473f51ce6

        SHA256

        d3f1b0b133c911d0ce3f7900ef65a812dca3ea6ddb585049fc853c65aeb98841

        SHA512

        d300d87cb62204f39219543f9380b07244f25e89c5c4e3673564c4f768e4c3381577e0bea9f32f2bfe4aa7da548f5dd3449b07c1b9ab95ce7e5a1ffb41c74f81

      • memory/672-44-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-33-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-19-0x0000000002200000-0x000000000240F000-memory.dmp

        Filesize

        2.1MB

      • memory/672-43-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-42-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-23-0x00000000003F0000-0x00000000003F6000-memory.dmp

        Filesize

        24KB

      • memory/672-26-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-14-0x0000000000170000-0x0000000000185000-memory.dmp

        Filesize

        84KB

      • memory/672-12-0x0000000000170000-0x0000000000185000-memory.dmp

        Filesize

        84KB

      • memory/672-15-0x0000000000170000-0x0000000000185000-memory.dmp

        Filesize

        84KB

      • memory/672-29-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-53-0x0000000007100000-0x000000000750B000-memory.dmp

        Filesize

        4.0MB

      • memory/672-54-0x00000000017E0000-0x00000000017E7000-memory.dmp

        Filesize

        28KB

      • memory/672-50-0x0000000007100000-0x000000000750B000-memory.dmp

        Filesize

        4.0MB

      • memory/672-49-0x00000000017D0000-0x00000000017D5000-memory.dmp

        Filesize

        20KB

      • memory/672-46-0x00000000017D0000-0x00000000017D5000-memory.dmp

        Filesize

        20KB

      • memory/672-45-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-30-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-31-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-22-0x0000000002200000-0x000000000240F000-memory.dmp

        Filesize

        2.1MB

      • memory/672-40-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-41-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-39-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-38-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-37-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-36-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-35-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-34-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/672-32-0x0000000001780000-0x0000000001790000-memory.dmp

        Filesize

        64KB

      • memory/1608-17-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/1608-11-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/3220-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3220-7-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/3220-1-0x00000000004E0000-0x00000000005E0000-memory.dmp

        Filesize

        1024KB

      • memory/3220-8-0x0000000000900000-0x0000000000913000-memory.dmp

        Filesize

        76KB

      • memory/3220-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3220-2-0x0000000000900000-0x0000000000913000-memory.dmp

        Filesize

        76KB