Overview

overview

10

Static

static

3

2d49ab2f33...c5.exe

windows7-x64

10

2d49ab2f33...c5.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-09-2024 01:42

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General

  • Target

    2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe

  • Size

    11.8MB

  • MD5

    b32f61c5c47e9473cf4a0ac98e8143c1

  • SHA1

    d6de6d48a87510f4ba641785e56311a4732dcf26

  • SHA256

    2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5

  • SHA512

    cc0cc0499616d0277920597b7beb8ee0b53d99c9e8d8c827c6e2244dc9a98785a848f17368f6991d362f9b6f76cd3a1f7ebcc31e99c34097c458872336ab5c21

  • SSDEEP

    6144:9c6OZDisWsD0Td2HJxO+m8PuG1R4WnWjrsaz:91OZDisvwdaxO0PuG1R4CWs

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
  • 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 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe
    "C:\Users\Admin\AppData\Local\Temp\2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2004
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\klbdabxz\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2080
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ndzojbzh.exe" C:\Windows\SysWOW64\klbdabxz\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3252
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create klbdabxz binPath= "C:\Windows\SysWOW64\klbdabxz\ndzojbzh.exe /d\"C:\Users\Admin\AppData\Local\Temp\2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2952
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description klbdabxz "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:668
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start klbdabxz
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1624
    • 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:1776
  • C:\Windows\SysWOW64\klbdabxz\ndzojbzh.exe
    C:\Windows\SysWOW64\klbdabxz\ndzojbzh.exe /d"C:\Users\Admin\AppData\Local\Temp\2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2480
    • 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:4960

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\ndzojbzh.exe
    Filesize

    11.8MB

    MD5

    b32f61c5c47e9473cf4a0ac98e8143c1

    SHA1

    d6de6d48a87510f4ba641785e56311a4732dcf26

    SHA256

    2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5

    SHA512

    cc0cc0499616d0277920597b7beb8ee0b53d99c9e8d8c827c6e2244dc9a98785a848f17368f6991d362f9b6f76cd3a1f7ebcc31e99c34097c458872336ab5c21

    Download Submit

  • memory/2004-2-0x0000000000680000-0x0000000000693000-memory.dmp

    Filesize

    76KB

    Download

  • memory/2004-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2004-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2004-8-0x0000000000680000-0x0000000000693000-memory.dmp

    Filesize

    76KB

    Download

  • memory/2004-7-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/2004-1-0x00000000007F0000-0x00000000008F0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2480-17-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/2480-12-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/2480-11-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/4960-46-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-38-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-18-0x0000000000330000-0x0000000000345000-memory.dmp

    Filesize

    84KB

    Download

  • memory/4960-44-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-50-0x00000000025E0000-0x00000000025E5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/4960-55-0x00000000025F0000-0x00000000025F7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/4960-51-0x0000000007100000-0x000000000750B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/4960-47-0x00000000025E0000-0x00000000025E5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/4960-13-0x0000000000330000-0x0000000000345000-memory.dmp

    Filesize

    84KB

    Download

  • memory/4960-45-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-43-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-42-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-41-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-40-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-39-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-16-0x0000000000330000-0x0000000000345000-memory.dmp

    Filesize

    84KB

    Download

  • memory/4960-37-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-36-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-35-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-34-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-33-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-32-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-30-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-54-0x0000000007100000-0x000000000750B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/4960-27-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-24-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

    Download

  • memory/4960-23-0x0000000002200000-0x000000000240F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/4960-31-0x0000000002410000-0x0000000002420000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4960-20-0x0000000002200000-0x000000000240F000-memory.dmp

    Filesize

    2.1MB

    Download