Analysis

  • max time kernel
    144s
  • 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
    06-09-2024 18:51

General

  • Target

    RSno9EH0K9.exe

  • Size

    213KB

  • MD5

    8e456f932787fcd0cadbb598174575b2

  • SHA1

    22b069c76b86bdb6be8cdafc78019b55c583062e

  • SHA256

    c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5

  • SHA512

    cb26a33dacdcfe804bdd587ecd44b9bf1c59f357e8701fc4f5e1b04d8d8882466c7743fac51969fe8912e1197a5653986eb4a71edc35eee89051b6c98d546c9d

  • SSDEEP

    6144:MGDLD6Tj3Vyg0mwiRjaVlodEFjvn/Mq0Vdh1HQ:M+L2n3VygtzRWJjv+Vdz

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.

  • 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 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RSno9EH0K9.exe
    "C:\Users\Admin\AppData\Local\Temp\RSno9EH0K9.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5080
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pwnalfhg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4064
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nddamyom.exe" C:\Windows\SysWOW64\pwnalfhg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2352
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create pwnalfhg binPath= "C:\Windows\SysWOW64\pwnalfhg\nddamyom.exe /d\"C:\Users\Admin\AppData\Local\Temp\RSno9EH0K9.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1184
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description pwnalfhg "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2348
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start pwnalfhg
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1280
    • 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:2072
  • C:\Windows\SysWOW64\pwnalfhg\nddamyom.exe
    C:\Windows\SysWOW64\pwnalfhg\nddamyom.exe /d"C:\Users\Admin\AppData\Local\Temp\RSno9EH0K9.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4524
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:2332

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    12.9MB

    MD5

    d76195c1202e034cc952addcf53357cb

    SHA1

    c32ca04b70e2632fa4f69151e0ef37bd2f50b7a4

    SHA256

    94583f0b84a4ea0b4bcf0fa3fba3731c6ddf51118c81f8c48161992cdf47c9fa

    SHA512

    e6c633781beb308c15aad99586aa17525658f1c9e34c77d7a644aab1e2646055c4eab60dc7fe5c4a343a74d8513762fb46f71149fd676073aa4a0aab6e006ce2

  • memory/2332-51-0x00000000033D0000-0x00000000033D5000-memory.dmp

    Filesize

    20KB

  • memory/2332-42-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-24-0x0000000003000000-0x000000000320F000-memory.dmp

    Filesize

    2.1MB

  • memory/2332-28-0x00000000027A0000-0x00000000027A6000-memory.dmp

    Filesize

    24KB

  • memory/2332-31-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-34-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-54-0x00000000033D0000-0x00000000033D5000-memory.dmp

    Filesize

    20KB

  • memory/2332-35-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-37-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-14-0x00000000012F0000-0x0000000001305000-memory.dmp

    Filesize

    84KB

  • memory/2332-38-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-39-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-18-0x00000000012F0000-0x0000000001305000-memory.dmp

    Filesize

    84KB

  • memory/2332-19-0x00000000012F0000-0x0000000001305000-memory.dmp

    Filesize

    84KB

  • memory/2332-59-0x00000000033E0000-0x00000000033E7000-memory.dmp

    Filesize

    28KB

  • memory/2332-27-0x0000000003000000-0x000000000320F000-memory.dmp

    Filesize

    2.1MB

  • memory/2332-58-0x0000000007F00000-0x000000000830B000-memory.dmp

    Filesize

    4.0MB

  • memory/2332-50-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-40-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-36-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-55-0x0000000007F00000-0x000000000830B000-memory.dmp

    Filesize

    4.0MB

  • memory/2332-49-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-48-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-47-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-46-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-45-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-44-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-43-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/2332-41-0x00000000027B0000-0x00000000027C0000-memory.dmp

    Filesize

    64KB

  • memory/4524-9-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/4524-17-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/4524-13-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/4524-10-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/5080-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/5080-16-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/5080-12-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/5080-1-0x00000000004F0000-0x00000000005F0000-memory.dmp

    Filesize

    1024KB

  • memory/5080-11-0x00000000004D0000-0x00000000004E3000-memory.dmp

    Filesize

    76KB

  • memory/5080-7-0x00000000004F0000-0x00000000005F0000-memory.dmp

    Filesize

    1024KB

  • memory/5080-2-0x00000000004D0000-0x00000000004E3000-memory.dmp

    Filesize

    76KB