Overview

overview

10

Static

static

3

cryptolaemus

windows10-2004-x64

10

cryptolaemus

windows11-21h2-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    06-09-2024 06:06

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General

  • Target

    9e08c4e34c5358916c1f360f4c82efc4d7bd77d587cda899691a49c3dffb1bc6.exe

  • Size

    213KB

  • MD5

    969450e69a3e85413b63c73abb733bdd

  • SHA1

    b506ca717ff22a749bf6e173a7d02b577564ce27

  • SHA256

    9e08c4e34c5358916c1f360f4c82efc4d7bd77d587cda899691a49c3dffb1bc6

  • SHA512

    8df1b276ff7f5cb67818ccc47158e3ba06f303e6da9aae1e0526c7537cb80d8a59e73e7aca80bd2cd0471a31a1dde49f7e96f05887ca66f9439b460ea3bda858

  • SSDEEP

    6144:PcDXnqPnz58kFjno63Fe/MMQm0Vdh1GQ:PsXq/z5V1nfFxjVdz

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
  • 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\9e08c4e34c5358916c1f360f4c82efc4d7bd77d587cda899691a49c3dffb1bc6.exe
    "C:\Users\Admin\AppData\Local\Temp\9e08c4e34c5358916c1f360f4c82efc4d7bd77d587cda899691a49c3dffb1bc6.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2012
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ztkraemm\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2848
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iyujewuc.exe" C:\Windows\SysWOW64\ztkraemm\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4508
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ztkraemm binPath= "C:\Windows\SysWOW64\ztkraemm\iyujewuc.exe /d\"C:\Users\Admin\AppData\Local\Temp\9e08c4e34c5358916c1f360f4c82efc4d7bd77d587cda899691a49c3dffb1bc6.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3452
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ztkraemm "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1436
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ztkraemm
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3868
    • 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:2948
  • C:\Windows\SysWOW64\ztkraemm\iyujewuc.exe
    C:\Windows\SysWOW64\ztkraemm\iyujewuc.exe /d"C:\Users\Admin\AppData\Local\Temp\9e08c4e34c5358916c1f360f4c82efc4d7bd77d587cda899691a49c3dffb1bc6.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2684
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:3368

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

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\iyujewuc.exe
    Filesize

    14.8MB

    MD5

    36dcb25700fc5029485f02e39757fd7c

    SHA1

    477f8448a21e9d93e24b715db497640b3a6ad734

    SHA256

    f0fc9ccfb6ed77a4773cb83f8c35199e23682614357be715a8fa6278b4acf84f

    SHA512

    d1d69d446ed2e2ec42a3f6269e5ad9746316c4ca1d8ee711affb1782eba77620e06c5da564c94d2aee3c7c11ddd85bff48d649559e441a9cb5cb40e3ca4c0482

    Download Submit

  • memory/2012-2-0x0000000002280000-0x0000000002293000-memory.dmp

    Filesize

    76KB

    Download

  • memory/2012-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2012-7-0x00000000004D0000-0x00000000005D0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2012-1-0x00000000004D0000-0x00000000005D0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2012-11-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download

  • memory/2012-12-0x0000000002280000-0x0000000002293000-memory.dmp

    Filesize

    76KB

    Download

  • memory/2012-13-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2684-14-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download

  • memory/3368-51-0x00000000027E0000-0x00000000027E5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/3368-43-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-17-0x0000000000370000-0x0000000000385000-memory.dmp

    Filesize

    84KB

    Download

  • memory/3368-55-0x0000000007200000-0x000000000760B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/3368-35-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-28-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-25-0x00000000019F0000-0x00000000019F6000-memory.dmp

    Filesize

    24KB

    Download

  • memory/3368-56-0x00000000027F0000-0x00000000027F7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/3368-52-0x0000000007200000-0x000000000760B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/3368-9-0x0000000000370000-0x0000000000385000-memory.dmp

    Filesize

    84KB

    Download

  • memory/3368-48-0x00000000027E0000-0x00000000027E5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/3368-47-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-46-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-45-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-44-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-15-0x0000000000370000-0x0000000000385000-memory.dmp

    Filesize

    84KB

    Download

  • memory/3368-42-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-41-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-40-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-39-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-38-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-37-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-36-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-34-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-33-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-32-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-31-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3368-24-0x0000000002200000-0x000000000240F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/3368-21-0x0000000002200000-0x000000000240F000-memory.dmp

    Filesize

    2.1MB

    Download