Overview

overview

10

Static

static

3

21a5e8cf35...25.exe

windows7-x64

10

21a5e8cf35...25.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    05-09-2024 01:11

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General

  • Target

    21a5e8cf356706a639eee50ea97cecef91685eb906921245c314ac50950b9825.exe

  • Size

    10.5MB

  • MD5

    274d0ab4368246be7f22990d9d5cb4cf

  • SHA1

    d34547e852863893aef034effc726bf2ee227d02

  • SHA256

    21a5e8cf356706a639eee50ea97cecef91685eb906921245c314ac50950b9825

  • SHA512

    dab676f30f08c6719e26cc376c89803a14d89adf50c6ee31d941f724b3dae03ca1cce950a3dd7651e3ed5f40323b021c875cdd1dfbbba9952cd417d7a3f90e81

  • SSDEEP

    6144:Sc6OZDisWsD0Td2HJxO+m8PuG1R4WnWjrsaz:S1OZDisvwdaxO0PuG1R4CWs

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
  • Windows security bypass 2 TTPs 1 IoCs
    evasiontrojan
  • 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
  • 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 7 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\21a5e8cf356706a639eee50ea97cecef91685eb906921245c314ac50950b9825.exe
    "C:\Users\Admin\AppData\Local\Temp\21a5e8cf356706a639eee50ea97cecef91685eb906921245c314ac50950b9825.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3000
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uykfueup\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1136
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gaasvfjv.exe" C:\Windows\SysWOW64\uykfueup\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2372
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create uykfueup binPath= "C:\Windows\SysWOW64\uykfueup\gaasvfjv.exe /d\"C:\Users\Admin\AppData\Local\Temp\21a5e8cf356706a639eee50ea97cecef91685eb906921245c314ac50950b9825.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2272
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description uykfueup "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2772
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start uykfueup
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2900
    • 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:2956
  • C:\Windows\SysWOW64\uykfueup\gaasvfjv.exe
    C:\Windows\SysWOW64\uykfueup\gaasvfjv.exe /d"C:\Users\Admin\AppData\Local\Temp\21a5e8cf356706a639eee50ea97cecef91685eb906921245c314ac50950b9825.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2884
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • 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:2764

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

2
T1562

Disable or Modify System Firewall

1
T1562.004

Disable or Modify Tools

1
T1562.001

Modify Registry

2
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\gaasvfjv.exe
    Filesize

    14.9MB

    MD5

    01bb7db6fb951a7547b7c51003b8d59c

    SHA1

    f9dadcf65fac2c9dab054cdc214147830b5a8bfa

    SHA256

    c9a70c1251bbcc19485c6a15a66ab2179eefdb320b22143aa438ef31c9a14b48

    SHA512

    a828936ecb9c3cdb39b6508306f84a16a14a16be15460e7dbe66170bd73ab6353a5022c9a150a71cae92f0fc99cb653c70bc057fba91ed95210073eaa246a900

    Download Submit

  • memory/2764-41-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-31-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-30-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-11-0x00000000000A0000-0x00000000000B5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2764-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2764-8-0x00000000000A0000-0x00000000000B5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2764-50-0x0000000000200000-0x0000000000205000-memory.dmp

    Filesize

    20KB

    Download

  • memory/2764-32-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-55-0x0000000000420000-0x0000000000427000-memory.dmp

    Filesize

    28KB

    Download

  • memory/2764-33-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-17-0x00000000000A0000-0x00000000000B5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2764-18-0x00000000000A0000-0x00000000000B5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2764-20-0x0000000001900000-0x0000000001B0F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2764-27-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-24-0x0000000000080000-0x0000000000086000-memory.dmp

    Filesize

    24KB

    Download

  • memory/2764-23-0x0000000001900000-0x0000000001B0F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2764-51-0x0000000005500000-0x000000000590B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/2764-54-0x0000000005500000-0x000000000590B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/2764-34-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-35-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-42-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-46-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-45-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-44-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-43-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-47-0x0000000000200000-0x0000000000205000-memory.dmp

    Filesize

    20KB

    Download

  • memory/2764-36-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-40-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-39-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-38-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2764-37-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2884-13-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/3000-1-0x00000000007C0000-0x00000000008C0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/3000-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/3000-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

    Download

  • memory/3000-14-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/3000-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/3000-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

    Download