Overview

overview

10

Static

static

3

cryptolaemus

windows10-2004-x64

10

cryptolaemus

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    157s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    06-09-2024 10:01

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General

  • Target

    c97280c3f5a9f5624e77be287469eb85310b777391395da12d2e66737c98d877.exe

  • Size

    213KB

  • MD5

    ee271bdebc1bcd255611d9003a2833ae

  • SHA1

    fdd6de358c491b1cf26d3a3ec1eb83467a75661c

  • SHA256

    c97280c3f5a9f5624e77be287469eb85310b777391395da12d2e66737c98d877

  • SHA512

    f711a36e4fbf367094d77ac60bf9140a0bfc4d6b620541f4771d8c332066f5823538edc3ca6d09c140b930fafc891c85293c168e6ac9065b9dea814f2f0d5dd6

  • SSDEEP

    6144:taDXnqPnz53mEBAQTcoToM4v//MRb0Vdh1JQ:t6Xq/z53mz3M4vjVdz

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

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.

    trojantofsee
  • Creates new service(s) 2 TTPs
    persistenceexecution
  • Modifies Windows Firewall 2 TTPs 1 IoCs
    evasion
  • Sets service image path in registry 2 TTPs 1 IoCs
    persistence
  • 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.

    persistenceprivilege_escalation
  • 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.

    discovery
  • Modifies data under HKEY_USERS 6 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c97280c3f5a9f5624e77be287469eb85310b777391395da12d2e66737c98d877.exe
    "C:\Users\Admin\AppData\Local\Temp\c97280c3f5a9f5624e77be287469eb85310b777391395da12d2e66737c98d877.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2552
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jtvafcya\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1860
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ipsnmgga.exe" C:\Windows\SysWOW64\jtvafcya\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:108
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create jtvafcya binPath= "C:\Windows\SysWOW64\jtvafcya\ipsnmgga.exe /d\"C:\Users\Admin\AppData\Local\Temp\c97280c3f5a9f5624e77be287469eb85310b777391395da12d2e66737c98d877.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1516
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description jtvafcya "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:660
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start jtvafcya
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3900
    • 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:4660
  • C:\Windows\SysWOW64\jtvafcya\ipsnmgga.exe
    C:\Windows\SysWOW64\jtvafcya\ipsnmgga.exe /d"C:\Users\Admin\AppData\Local\Temp\c97280c3f5a9f5624e77be287469eb85310b777391395da12d2e66737c98d877.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3688
    • 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:1448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1
T1569

Service Execution

1
T1569.002

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Defense Evasion

Impair Defenses

1
T1562

Disable or Modify System Firewall

1
T1562.004

Modify Registry

1
T1112

Credential Access

Discovery

System Information Discovery

1
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\ipsnmgga.exe
    Filesize

    12.8MB

    MD5

    ab07075f06b55eb95564dfdf234fabcb

    SHA1

    3e8de063fc80e6c749d320eb82d421c61340a38f

    SHA256

    b20026f3944140c5be17da78788cc61bd79518d8aa265a89e11084a2f5eea49d

    SHA512

    1a49eeb8c2627ece25dba0315e5f4722ce9164cabd6fe09680e9abc53ef34d6ea7254e02ef0ff2342a9891edc9716ada40c18d62aa9e246367c91fe85b8ba544

    Download Submit

  • memory/1448-38-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-25-0x0000000000BF0000-0x0000000000BF6000-memory.dmp

    Filesize

    24KB

    Download

  • memory/1448-21-0x0000000002800000-0x0000000002A0F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/1448-46-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-45-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-28-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-31-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-32-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-33-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-15-0x0000000000910000-0x0000000000925000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1448-16-0x0000000000910000-0x0000000000925000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1448-24-0x0000000002800000-0x0000000002A0F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/1448-56-0x0000000002DD0000-0x0000000002DD7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/1448-55-0x0000000007800000-0x0000000007C0B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/1448-52-0x0000000007800000-0x0000000007C0B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/1448-51-0x0000000001FF0000-0x0000000001FF5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/1448-48-0x0000000001FF0000-0x0000000001FF5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/1448-47-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-8-0x0000000000910000-0x0000000000925000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1448-34-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-43-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-44-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-42-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-41-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-40-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-39-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-35-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-37-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-36-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2552-1-0x00000000005B0000-0x00000000006B0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2552-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2552-13-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2552-12-0x0000000000590000-0x00000000005A3000-memory.dmp

    Filesize

    76KB

    Download

  • memory/2552-11-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download

  • memory/2552-10-0x00000000005B0000-0x00000000006B0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2552-2-0x0000000000590000-0x00000000005A3000-memory.dmp

    Filesize

    76KB

    Download

  • memory/3688-14-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download