Analysis

  • max time kernel
    147s
  • 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
    04-09-2024 12:51

General

  • Target

    c8429917332f470b4e52c49d20490066a0c40381d6e60b732e82c50aa169405c.exe

  • Size

    213KB

  • MD5

    bbe557849887cec6ae81a416bad916e0

  • SHA1

    4a1d6ec85d604c1fbe96ad32ee94a7fbfdab797a

  • SHA256

    c8429917332f470b4e52c49d20490066a0c40381d6e60b732e82c50aa169405c

  • SHA512

    ed96746db7e2b12bc1ce9e9ec31ea75d19ccc67587b52aee9800a3123d437f6d97ddabb2a3f5b7a63ae4444fc59fb39d8a117fc3ade52cd77472f3c746415910

  • SSDEEP

    3072:lGCCafq9b79ZJ3k8e+sNPTRtr9sGVJx169blf49aTbQ:bfq9b79ZJ3kfPpsGZ8Pg9i

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\c8429917332f470b4e52c49d20490066a0c40381d6e60b732e82c50aa169405c.exe
    "C:\Users\Admin\AppData\Local\Temp\c8429917332f470b4e52c49d20490066a0c40381d6e60b732e82c50aa169405c.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3484
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uqxegddo\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2728
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dpbgdjiw.exe" C:\Windows\SysWOW64\uqxegddo\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5112
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create uqxegddo binPath= "C:\Windows\SysWOW64\uqxegddo\dpbgdjiw.exe /d\"C:\Users\Admin\AppData\Local\Temp\c8429917332f470b4e52c49d20490066a0c40381d6e60b732e82c50aa169405c.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:796
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description uqxegddo "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3756
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start uqxegddo
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3012
    • 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:3204
  • C:\Windows\SysWOW64\uqxegddo\dpbgdjiw.exe
    C:\Windows\SysWOW64\uqxegddo\dpbgdjiw.exe /d"C:\Users\Admin\AppData\Local\Temp\c8429917332f470b4e52c49d20490066a0c40381d6e60b732e82c50aa169405c.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1384
    • 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:2200

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.6MB

    MD5

    254770e88cccc6bfb8b7a37e844deaf1

    SHA1

    84b991d690ad1ef5062ee290e162490dd9f95e91

    SHA256

    db11bc4ed60944b1f16e3df5c34e76891695ea054ea2faceed034ed7331229aa

    SHA512

    b07ac3ce237e3f67fb01a6ad2aefc1138124020f9653e49feb2cd5381f1fdd64d718eeb786d1675789d98bbad5f3646099b614245a9a1c154e0a53c849764a8f

  • memory/1384-12-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1384-18-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1384-13-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1384-11-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/2200-45-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-43-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-22-0x0000000003000000-0x000000000320F000-memory.dmp

    Filesize

    2.1MB

  • memory/2200-36-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-51-0x00000000027F0000-0x00000000027F5000-memory.dmp

    Filesize

    20KB

  • memory/2200-14-0x00000000012E0000-0x00000000012F5000-memory.dmp

    Filesize

    84KB

  • memory/2200-16-0x00000000012E0000-0x00000000012F5000-memory.dmp

    Filesize

    84KB

  • memory/2200-55-0x0000000007F00000-0x000000000830B000-memory.dmp

    Filesize

    4.0MB

  • memory/2200-19-0x00000000012E0000-0x00000000012F5000-memory.dmp

    Filesize

    84KB

  • memory/2200-25-0x0000000002790000-0x0000000002796000-memory.dmp

    Filesize

    24KB

  • memory/2200-56-0x00000000033D0000-0x00000000033D7000-memory.dmp

    Filesize

    28KB

  • memory/2200-52-0x0000000007F00000-0x000000000830B000-memory.dmp

    Filesize

    4.0MB

  • memory/2200-48-0x00000000027F0000-0x00000000027F5000-memory.dmp

    Filesize

    20KB

  • memory/2200-47-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-46-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-24-0x0000000003000000-0x000000000320F000-memory.dmp

    Filesize

    2.1MB

  • memory/2200-44-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-28-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-42-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-41-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-40-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-39-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-38-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-37-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-35-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-34-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-33-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-32-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/2200-31-0x00000000027A0000-0x00000000027B0000-memory.dmp

    Filesize

    64KB

  • memory/3484-8-0x00000000006E0000-0x00000000006F3000-memory.dmp

    Filesize

    76KB

  • memory/3484-2-0x00000000006E0000-0x00000000006F3000-memory.dmp

    Filesize

    76KB

  • memory/3484-1-0x0000000000750000-0x0000000000850000-memory.dmp

    Filesize

    1024KB

  • memory/3484-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3484-7-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/3484-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB