Analysis

  • max time kernel
    44s
  • max time network
    44s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    03-09-2024 07:21

General

  • Target

    vbojcjwr.exe

  • Size

    14.6MB

  • MD5

    0b6833eac88372fe36ddb7217eca8b41

  • SHA1

    240c3b81c19be5b09d140bbd9a35060f4a7a7573

  • SHA256

    4a5face1152fe18fd167e2f785857e0e4266997ff8d74285fa920bcb83523ca8

  • SHA512

    2d60e25ba50d496b3f359deb713e2c206edbffb6bd2233729ad0bba87cb247ba5bb6a3c0f6d3a6f5bcde3b58e3c58259490c62bff14769efff6f77280069519b

  • SSDEEP

    6144:qw0VDy74AW/47pwSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSn:qw0VD7AW/49

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Signatures

  • Tofsee

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

  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 1 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.

  • 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 2 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\vbojcjwr.exe
    "C:\Users\Admin\AppData\Local\Temp\vbojcjwr.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2096
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iimzeqaf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2652
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rkhpgztq.exe" C:\Windows\SysWOW64\iimzeqaf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2956
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create iimzeqaf binPath= "C:\Windows\SysWOW64\iimzeqaf\rkhpgztq.exe /d\"C:\Users\Admin\AppData\Local\Temp\vbojcjwr.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2680
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description iimzeqaf "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2944
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start iimzeqaf
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2812
    • 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:2720
  • C:\Windows\SysWOW64\iimzeqaf\rkhpgztq.exe
    C:\Windows\SysWOW64\iimzeqaf\rkhpgztq.exe /d"C:\Users\Admin\AppData\Local\Temp\vbojcjwr.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3064
    • 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:2612

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    12.3MB

    MD5

    fcb840ab23e8d29477f54e748bc76e52

    SHA1

    4b58d25d852392ff4405a854e7a1454a2b1e665a

    SHA256

    97e7e8c6d89c67997530f7af774b53d385b7e2dd4542e58d0840b92f75ef32a4

    SHA512

    a3e8c3bce75474e605c2112e6a5e5be7d7fd4e1eee825d893f1a2bbceefe6b55e6f2bbb0fcdd4f8c8e3439f9e0d10e9b0382c3fc042130d34ff37899170b6c4c

  • memory/2096-8-0x00000000002B0000-0x00000000002C3000-memory.dmp

    Filesize

    76KB

  • memory/2096-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2096-2-0x00000000002B0000-0x00000000002C3000-memory.dmp

    Filesize

    76KB

  • memory/2096-7-0x0000000000400000-0x000000000045A000-memory.dmp

    Filesize

    360KB

  • memory/2096-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2096-1-0x00000000004E0000-0x00000000005E0000-memory.dmp

    Filesize

    1024KB

  • memory/2612-16-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2612-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2612-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2612-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2612-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/3064-17-0x0000000000400000-0x000000000045A000-memory.dmp

    Filesize

    360KB