Overview

overview

10

Static

static

10

b3c1e9f75d...36.exe

windows7-x64

10

b3c1e9f75d...36.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    105s
  • max time network
    107s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-10-2024 08:58

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General

  • Target

    b3c1e9f75d14351aa6d078525ed891bbefdf29c0a609efa9ebd9db997c455936.exe

  • Size

    11.1MB

  • MD5

    19ac32a44156aca36e14ad44a9a5e1c2

  • SHA1

    900669e5aea78afc93bb894ac5d99066d7f21ad3

  • SHA256

    b3c1e9f75d14351aa6d078525ed891bbefdf29c0a609efa9ebd9db997c455936

  • SHA512

    461426485f7337a776f9ff8a47b27aa079507d61c6222fc035a7402c5647dac4331f0c3f1e25d229e42bd7fca5c134980c499e0db81607f695f964d0ce5f6648

  • SSDEEP

    6144:zdVCxKg+IFppIHzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzD:B85tFpp

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

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.

    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
  • 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.

    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 5 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b3c1e9f75d14351aa6d078525ed891bbefdf29c0a609efa9ebd9db997c455936.exe
    "C:\Users\Admin\AppData\Local\Temp\b3c1e9f75d14351aa6d078525ed891bbefdf29c0a609efa9ebd9db997c455936.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1636
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fejebvqt\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3316
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qlvrfqv.exe" C:\Windows\SysWOW64\fejebvqt\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5048
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create fejebvqt binPath= "C:\Windows\SysWOW64\fejebvqt\qlvrfqv.exe /d\"C:\Users\Admin\AppData\Local\Temp\b3c1e9f75d14351aa6d078525ed891bbefdf29c0a609efa9ebd9db997c455936.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4876
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description fejebvqt "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3500
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start fejebvqt
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1688
    • 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:3740
  • C:\Windows\SysWOW64\fejebvqt\qlvrfqv.exe
    C:\Windows\SysWOW64\fejebvqt\qlvrfqv.exe /d"C:\Users\Admin\AppData\Local\Temp\b3c1e9f75d14351aa6d078525ed891bbefdf29c0a609efa9ebd9db997c455936.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4184
    • 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:3648

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

Query Registry

1
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

    10.1MB

    MD5

    a19534da1178d5e0d131614d66cc7d24

    SHA1

    0c1d2e37c4508f4997a1aa6cee050b22e04f2be8

    SHA256

    de414ac9b33490db7cf35aa48fcc58fe9e6a6e6c261b5c0cabed8314fa33e3e8

    SHA512

    e045a8fd2c8bf60df5622a03b0937f3555978306a5fb7b276b9b4a970bdcaa2ca090593c2ae8d42dd6940e5311c76ca37f505ca98f596784acd72c5b036a5556

    Download Submit

  • memory/3648-3-0x0000000000470000-0x0000000000485000-memory.dmp

    Filesize

    84KB

    Download

  • memory/3648-6-0x0000000000470000-0x0000000000485000-memory.dmp

    Filesize

    84KB

    Download

  • memory/3648-7-0x0000000000470000-0x0000000000485000-memory.dmp

    Filesize

    84KB

    Download

  • memory/3648-8-0x0000000000470000-0x0000000000485000-memory.dmp

    Filesize

    84KB

    Download

  • memory/3648-9-0x0000000000470000-0x0000000000485000-memory.dmp

    Filesize

    84KB

    Download

  • memory/3648-42-0x0000000007180000-0x000000000758B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/3648-38-0x00000000027D0000-0x00000000027D5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/3648-37-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-46-0x00000000027E0000-0x00000000027E7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/3648-36-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-35-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-34-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-33-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-32-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-31-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-30-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-29-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-28-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-27-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-26-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-25-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-24-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-23-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-22-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-21-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-18-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3648-15-0x00000000017E0000-0x00000000017E6000-memory.dmp

    Filesize

    24KB

    Download

  • memory/3648-41-0x00000000027D0000-0x00000000027D5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/3648-14-0x0000000002200000-0x000000000240F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/3648-12-0x0000000002200000-0x000000000240F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/3648-45-0x0000000007180000-0x000000000758B000-memory.dmp

    Filesize

    4.0MB

    Download