Overview

overview

10

Static

static

3

e7c93d1b0d...fN.exe

windows7-x64

10

e7c93d1b0d...fN.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    120s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    07-11-2024 00:35

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General

  • Target

    e7c93d1b0d7840be4795a7f33e1ca1ac19f7a3ee14dffcf7a2d0b67d2fd2017fN.exe

  • Size

    10.0MB

  • MD5

    142dadf7191c524a11eee9b4660c3540

  • SHA1

    e676b0a4c0cc8f5d7e42b42866d717f30327b221

  • SHA256

    e7c93d1b0d7840be4795a7f33e1ca1ac19f7a3ee14dffcf7a2d0b67d2fd2017f

  • SHA512

    7a17f72cbc71a7e52365cbf8e31b1439d804ea5f75f8548744d9c2cd541a83280eeb6987e473e9a962ab6a1cfdd14dc5258bd069a2bbff21f848dc727b126347

  • SSDEEP

    12288:lef9tiUIxYjvVzL10J7nnXVJAj1666666666666666666666666666666666666n:leriUGiP0J7n

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
  • Tofsee family
    tofsee
  • 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\e7c93d1b0d7840be4795a7f33e1ca1ac19f7a3ee14dffcf7a2d0b67d2fd2017fN.exe
    "C:\Users\Admin\AppData\Local\Temp\e7c93d1b0d7840be4795a7f33e1ca1ac19f7a3ee14dffcf7a2d0b67d2fd2017fN.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2892
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sdmdmjog\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2772
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zsyewtan.exe" C:\Windows\SysWOW64\sdmdmjog\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2920
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create sdmdmjog binPath= "C:\Windows\SysWOW64\sdmdmjog\zsyewtan.exe /d\"C:\Users\Admin\AppData\Local\Temp\e7c93d1b0d7840be4795a7f33e1ca1ac19f7a3ee14dffcf7a2d0b67d2fd2017fN.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2956
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description sdmdmjog "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2832
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start sdmdmjog
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2664
    • 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:2716
  • C:\Windows\SysWOW64\sdmdmjog\zsyewtan.exe
    C:\Windows\SysWOW64\sdmdmjog\zsyewtan.exe /d"C:\Users\Admin\AppData\Local\Temp\e7c93d1b0d7840be4795a7f33e1ca1ac19f7a3ee14dffcf7a2d0b67d2fd2017fN.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2476
    • 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:2004

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\zsyewtan.exe
    Filesize

    12.0MB

    MD5

    98800a0d92469ad54da5070a6f90a83e

    SHA1

    0018f06cabb2494942825b14882b1294318e3101

    SHA256

    6d57eb38c5f70368b1361e6181a04f417474cade08b99f8757b4b8ffde813f57

    SHA512

    ababcf5f25b8041d3e2f932092c757b6749286b37dbdb638726d8142ac0df49c43421f7d6c46c164b22c36980eaa64c9341a7524cf97bc80466ffea4ade95b5b

    Download Submit

  • memory/2004-49-0x0000000000100000-0x0000000000105000-memory.dmp

    Filesize

    20KB

    Download

  • memory/2004-39-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-22-0x0000000001A90000-0x0000000001C9F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2004-50-0x0000000005560000-0x000000000596B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/2004-29-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-30-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-31-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-13-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2004-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2004-10-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2004-34-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-16-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2004-17-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2004-54-0x0000000000190000-0x0000000000197000-memory.dmp

    Filesize

    28KB

    Download

  • memory/2004-19-0x0000000001A90000-0x0000000001C9F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2004-32-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-53-0x0000000005560000-0x000000000596B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/2004-37-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-27-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-33-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-23-0x0000000000080000-0x0000000000086000-memory.dmp

    Filesize

    24KB

    Download

  • memory/2004-46-0x0000000000100000-0x0000000000105000-memory.dmp

    Filesize

    20KB

    Download

  • memory/2004-45-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-44-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-43-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-42-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-41-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-40-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-35-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-38-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2004-36-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2476-14-0x0000000000400000-0x000000000046B000-memory.dmp

    Filesize

    428KB

    Download

  • memory/2892-2-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2892-0-0x00000000001B0000-0x00000000001DC000-memory.dmp

    Filesize

    176KB

    Download

  • memory/2892-8-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2892-5-0x0000000000400000-0x000000000046B000-memory.dmp

    Filesize

    428KB

    Download

  • memory/2892-6-0x00000000001E0000-0x00000000001F3000-memory.dmp

    Filesize

    76KB

    Download

  • memory/2892-7-0x00000000001B0000-0x00000000001DC000-memory.dmp

    Filesize

    176KB

    Download

  • memory/2892-1-0x00000000001E0000-0x00000000001F3000-memory.dmp

    Filesize

    76KB

    Download