Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-09-2024 08:48

General

  • Target

    9cc7ca2bf581e20dbe35e337991bcbdd7ed6cec3d34f71eefc41e4db12698866.exe

  • Size

    383KB

  • MD5

    a7b9d804ad2ead7a1f44135d3e54604e

  • SHA1

    522a5510602009783a7bb3eef2bcabb0cc0a37d8

  • SHA256

    9cc7ca2bf581e20dbe35e337991bcbdd7ed6cec3d34f71eefc41e4db12698866

  • SHA512

    90a844e9d807d7617b1c5482dfa64ad7b75ffd9352c8ec977ef13e772c5c10af868c74363773e4372ce0c8d6b8d8958759e6393bbfac482f2d3d2129db251f5b

  • SSDEEP

    6144:QEKJk5GefGfSmKiE6j7+JZBob0iJbY6B5fo7HEaKf:Qa5BufYw+fBobrhEL

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

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
  • 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.

  • 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 6 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9cc7ca2bf581e20dbe35e337991bcbdd7ed6cec3d34f71eefc41e4db12698866.exe
    "C:\Users\Admin\AppData\Local\Temp\9cc7ca2bf581e20dbe35e337991bcbdd7ed6cec3d34f71eefc41e4db12698866.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2072
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\apfmohqs\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2400
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cjivddlp.exe" C:\Windows\SysWOW64\apfmohqs\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:100
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create apfmohqs binPath= "C:\Windows\SysWOW64\apfmohqs\cjivddlp.exe /d\"C:\Users\Admin\AppData\Local\Temp\9cc7ca2bf581e20dbe35e337991bcbdd7ed6cec3d34f71eefc41e4db12698866.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4304
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description apfmohqs "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4744
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start apfmohqs
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1652
    • 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:924
  • C:\Windows\SysWOW64\apfmohqs\cjivddlp.exe
    C:\Windows\SysWOW64\apfmohqs\cjivddlp.exe /d"C:\Users\Admin\AppData\Local\Temp\9cc7ca2bf581e20dbe35e337991bcbdd7ed6cec3d34f71eefc41e4db12698866.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4780
    • 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:4384

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    14.8MB

    MD5

    c883b20cc55be4fff83960ab50844dab

    SHA1

    47fd89e8d59a9e0e9853609c2f3d789903c2f3ad

    SHA256

    9fc8680efa4bd49da3a4495976c17cfae577c10ec5f51fe8d9d118235c3a1828

    SHA512

    d70f1ab9e6694b5b24755f1b0e255dac482b9f217e076dd9df097feb0dd6c229387fa4e7b3722c5cbd6ef8d4598862be04777a4052b4ad62bbceee889a4a695a

  • memory/2072-2-0x00000000041C0000-0x00000000041D3000-memory.dmp

    Filesize

    76KB

  • memory/2072-1-0x0000000002600000-0x0000000002700000-memory.dmp

    Filesize

    1024KB

  • memory/2072-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2072-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2072-8-0x00000000041C0000-0x00000000041D3000-memory.dmp

    Filesize

    76KB

  • memory/2072-7-0x0000000000400000-0x0000000002478000-memory.dmp

    Filesize

    32.5MB

  • memory/4384-33-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-38-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-20-0x0000000002600000-0x000000000280F000-memory.dmp

    Filesize

    2.1MB

  • memory/4384-15-0x0000000000A10000-0x0000000000A25000-memory.dmp

    Filesize

    84KB

  • memory/4384-18-0x0000000002600000-0x000000000280F000-memory.dmp

    Filesize

    2.1MB

  • memory/4384-24-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-52-0x0000000002BD0000-0x0000000002BD7000-memory.dmp

    Filesize

    28KB

  • memory/4384-48-0x0000000007600000-0x0000000007A0B000-memory.dmp

    Filesize

    4.0MB

  • memory/4384-44-0x0000000001DF0000-0x0000000001DF5000-memory.dmp

    Filesize

    20KB

  • memory/4384-43-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-42-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-40-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-41-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-39-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-51-0x0000000007600000-0x0000000007A0B000-memory.dmp

    Filesize

    4.0MB

  • memory/4384-14-0x0000000000A10000-0x0000000000A25000-memory.dmp

    Filesize

    84KB

  • memory/4384-37-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-36-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-35-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-34-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-11-0x0000000000A10000-0x0000000000A25000-memory.dmp

    Filesize

    84KB

  • memory/4384-32-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-31-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-30-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-29-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-28-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-27-0x0000000001DE0000-0x0000000001DF0000-memory.dmp

    Filesize

    64KB

  • memory/4384-21-0x0000000001DD0000-0x0000000001DD6000-memory.dmp

    Filesize

    24KB

  • memory/4384-47-0x0000000001DF0000-0x0000000001DF5000-memory.dmp

    Filesize

    20KB

  • memory/4780-13-0x0000000000400000-0x0000000002478000-memory.dmp

    Filesize

    32.5MB