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Overview

overview

10

Static

static

3

bEsOrli29K.exe

windows7-x64

10

bEsOrli29K.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    02/09/2024, 14:57

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General

  • Target

    bEsOrli29K.exe

  • Size

    213KB

  • MD5

    a3247152e18ba6e88311f082a86515d3

  • SHA1

    80da2f14bb17f2d3ff1df6faf25622ebb8cf00c8

  • SHA256

    02c6f9163a5d988cee3ab12c11e03b18329c26d6b4863004f943133654693e97

  • SHA512

    b09fc49d7126b37c37f499be522c4b57e7538d2f64600bd789c93d90a315a023f0fbed9466c6069a38bb8c80bc9a6b250fcaec03b59ecfb3a40754c235c3e6d8

  • SSDEEP

    3072:AOFL8HN3BB33u/iMUk6efofpWqX2hnesi5kb:tLqN3Bt36iM/ofpKhn9

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\bEsOrli29K.exe
    "C:\Users\Admin\AppData\Local\Temp\bEsOrli29K.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1644
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ovrwnnhc\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2192
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xaxqhjdt.exe" C:\Windows\SysWOW64\ovrwnnhc\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3056
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ovrwnnhc binPath= "C:\Windows\SysWOW64\ovrwnnhc\xaxqhjdt.exe /d\"C:\Users\Admin\AppData\Local\Temp\bEsOrli29K.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2600
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ovrwnnhc "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1756
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ovrwnnhc
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2932
    • 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:1712
  • C:\Windows\SysWOW64\ovrwnnhc\xaxqhjdt.exe
    C:\Windows\SysWOW64\ovrwnnhc\xaxqhjdt.exe /d"C:\Users\Admin\AppData\Local\Temp\bEsOrli29K.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:956
    • 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:2180

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\xaxqhjdt.exe
    Filesize

    13.6MB

    MD5

    e707495bd5716624d58b8aecc59d5626

    SHA1

    8b24ff6c7dcc77ebff5e19ff2830aaadf03c2818

    SHA256

    1876805ded48883bf35edfb2ac3061538f50633638c92fa3d6d89c2a85b1cb68

    SHA512

    831838afe890a93a9581f131df22885cc284851934fc43b3e10fd2fb61e1f0fe07068bd6c107cc8026a41aba1afab2ae958a6b556e40c7e901d8354135d580ab

    Download Submit

  • memory/956-15-0x0000000000400000-0x0000000000448000-memory.dmp

    Filesize

    288KB

    Download

  • memory/1644-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

    Download

  • memory/1644-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1644-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1644-8-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

    Download

  • memory/1644-7-0x0000000000400000-0x0000000000448000-memory.dmp

    Filesize

    288KB

    Download

  • memory/1644-1-0x0000000000540000-0x0000000000640000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2180-50-0x00000000000C0000-0x00000000000C5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/2180-44-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2180-16-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2180-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2180-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2180-20-0x0000000001910000-0x0000000001B1F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2180-23-0x0000000001910000-0x0000000001B1F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2180-54-0x0000000005390000-0x000000000579B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/2180-47-0x00000000000C0000-0x00000000000C5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/2180-51-0x0000000005390000-0x000000000579B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/2180-55-0x0000000000320000-0x0000000000327000-memory.dmp

    Filesize

    28KB

    Download

  • memory/2180-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2180-46-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-45-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2180-43-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-42-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-41-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-40-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-39-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-38-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-37-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-36-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-35-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-34-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-33-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-32-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-31-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-30-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-27-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2180-24-0x00000000000A0000-0x00000000000A6000-memory.dmp

    Filesize

    24KB

    Download