Analysis

  • max time kernel
    143s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    17-09-2024 10:40

General

  • Target

    keulompy.exe

  • Size

    13.0MB

  • MD5

    2303196f2416629f0fe3ea16d6eb89c0

  • SHA1

    5d37ba77ce2839d3875876a2f61b3782e7d81ebb

  • SHA256

    51ac9e66490d43f06ad67e19e241b2a45489c558bc75a35f2d3403bfdc3adef4

  • SHA512

    02cbf4613104265bc8f07bb7337d4a60163e41344ca2e64b139c148d42b6711bea669305cdb6123625c4460ddcf41120650fbe3d393c618cf2766494d2a92894

  • SSDEEP

    6144:ROdTCzZzsvqZ+6PVaTkUmvK+YMdkTgdSki4TZt5IXXXXXXXXXXXXXXXXXXXXXXXX:R7g8+6PZvK+YMdk

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • 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 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.

  • 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 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\keulompy.exe
    "C:\Users\Admin\AppData\Local\Temp\keulompy.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1860
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\grtohayd\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1072
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qftqjplo.exe" C:\Windows\SysWOW64\grtohayd\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2592
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create grtohayd binPath= "C:\Windows\SysWOW64\grtohayd\qftqjplo.exe /d\"C:\Users\Admin\AppData\Local\Temp\keulompy.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2604
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description grtohayd "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2652
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start grtohayd
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3068
    • 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:2528
  • C:\Windows\SysWOW64\grtohayd\qftqjplo.exe
    C:\Windows\SysWOW64\grtohayd\qftqjplo.exe /d"C:\Users\Admin\AppData\Local\Temp\keulompy.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2788
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • 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:2504

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    10.8MB

    MD5

    0d2306b44ef875089cc9b56db2c77693

    SHA1

    625ee2ab7106f6f6e247f9751460363d6056232d

    SHA256

    81726e89a6679ecd1ef13c3479a7e59946b9eec1b83d19e23a4a1a5bcf64b963

    SHA512

    2357112e70093a758e5067401edcb8a6c2525893fcafb05036a6416c7cb4bd4d8edbc9025d3ca49fb018ad5c6c6dc8b634b2f03b2b59f7316ce9f7e1c47e539a

  • memory/1860-1-0x00000000008D0000-0x00000000009D0000-memory.dmp

    Filesize

    1024KB

  • memory/1860-2-0x00000000003B0000-0x00000000003C3000-memory.dmp

    Filesize

    76KB

  • memory/1860-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1860-10-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1860-9-0x00000000003B0000-0x00000000003C3000-memory.dmp

    Filesize

    76KB

  • memory/1860-8-0x0000000000400000-0x000000000046E000-memory.dmp

    Filesize

    440KB

  • memory/2504-50-0x00000000000C0000-0x00000000000C5000-memory.dmp

    Filesize

    20KB

  • memory/2504-44-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2504-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2504-24-0x00000000000A0000-0x00000000000A6000-memory.dmp

    Filesize

    24KB

  • memory/2504-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2504-20-0x0000000001C60000-0x0000000001E6F000-memory.dmp

    Filesize

    2.1MB

  • memory/2504-23-0x0000000001C60000-0x0000000001E6F000-memory.dmp

    Filesize

    2.1MB

  • memory/2504-54-0x0000000005740000-0x0000000005B4B000-memory.dmp

    Filesize

    4.0MB

  • memory/2504-51-0x0000000005740000-0x0000000005B4B000-memory.dmp

    Filesize

    4.0MB

  • memory/2504-55-0x00000000000D0000-0x00000000000D7000-memory.dmp

    Filesize

    28KB

  • memory/2504-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2504-47-0x00000000000C0000-0x00000000000C5000-memory.dmp

    Filesize

    20KB

  • memory/2504-46-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-45-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2504-43-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-42-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-41-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-40-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-39-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-38-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-37-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-36-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-35-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-34-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-33-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-32-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-31-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-30-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2504-27-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2788-15-0x0000000000400000-0x000000000046E000-memory.dmp

    Filesize

    440KB