Overview

overview

10

Static

static

3

2cccbfbe95...a2.exe

windows7-x64

10

2cccbfbe95...a2.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    147s
  • max time network
    150s
  • 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 09:46

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General

  • Target

    2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe

  • Size

    423KB

  • MD5

    b2e864c2f8f6e243822a5c133bb41061

  • SHA1

    5571df4cdc5b65cdc315c95ee52344dda7f12b20

  • SHA256

    2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2

  • SHA512

    32a6087702abe92daab3e2c194b07006f5b9d3cdf48c692d23775f0d75e2941882920767148564ac7fedc417beadb1ae75734f240d07bec30eb262ae4f534e73

  • SSDEEP

    6144:qc6OZDisWsD0Td2HJxO+m8PuG1R4WnWjrsaz:q1OZDisvwdaxO0PuG1R4CWs

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\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe
    "C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4384
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\seinxlqn\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3740
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jzzwiuki.exe" C:\Windows\SysWOW64\seinxlqn\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2756
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create seinxlqn binPath= "C:\Windows\SysWOW64\seinxlqn\jzzwiuki.exe /d\"C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2404
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description seinxlqn "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2900
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start seinxlqn
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4088
    • 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:4684
  • C:\Windows\SysWOW64\seinxlqn\jzzwiuki.exe
    C:\Windows\SysWOW64\seinxlqn\jzzwiuki.exe /d"C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4768
    • 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:2336

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\jzzwiuki.exe
    Filesize

    14.6MB

    MD5

    7d1a63c8b65affb64e23711e80c5e264

    SHA1

    0f8c63979490a907d11796c0af1c83b6f90a91cb

    SHA256

    f80a13b8d899974355abed025de29fc030e0cdf40a43b24ad4a7677bc4e9d95e

    SHA512

    34f2eb12f3a58855fe1333cb033c115086270a8e88840d2f5a187f28497e91621547cbdfb291094edd8df4598ea9c2f1e0bceeeaaec244c6a9a9faa03a87d5f1

    Download Submit

  • memory/2336-46-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-37-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-25-0x00000000025F0000-0x00000000025F6000-memory.dmp

    Filesize

    24KB

    Download

  • memory/2336-47-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-24-0x0000000002E00000-0x000000000300F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2336-29-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-31-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-33-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-34-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-14-0x0000000000F50000-0x0000000000F65000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2336-35-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-17-0x0000000000F50000-0x0000000000F65000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2336-19-0x0000000000F50000-0x0000000000F65000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2336-45-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-52-0x0000000007D00000-0x000000000810B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/2336-55-0x0000000007D00000-0x000000000810B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/2336-51-0x00000000031E0000-0x00000000031E5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/2336-48-0x00000000031E0000-0x00000000031E5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/2336-56-0x00000000031F0000-0x00000000031F7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/2336-32-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-22-0x0000000002E00000-0x000000000300F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2336-44-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-43-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-42-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-41-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-40-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-39-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-38-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2336-36-0x0000000003010000-0x0000000003020000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4384-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/4384-1-0x00000000007E0000-0x00000000008E0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/4384-7-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/4384-8-0x0000000000670000-0x0000000000683000-memory.dmp

    Filesize

    76KB

    Download

  • memory/4384-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/4384-2-0x0000000000670000-0x0000000000683000-memory.dmp

    Filesize

    76KB

    Download

  • memory/4768-18-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/4768-12-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/4768-13-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/4768-11-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

    Download