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Overview

overview

10

Static

static

10

dayum.exe

windows7-x64

10

dayum.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    140s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    02/01/2025, 08:19

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General

  • Target

    dayum.exe

  • Size

    23KB

  • MD5

    aa6a3fbb8d78e21710da58d6e7b87f86

  • SHA1

    09c8e4815c16a732d9842ef97fda4e347ad0ee27

  • SHA256

    9af4cf4b24bdb010ba408a9c9b3f26e0c52dd6d6dd3c0a9bd12180dd9028210a

  • SHA512

    724a7d8799acf7680ce0ea65e3902a0650aa9f2c635013d1e86a0dbd2ccba6ece5ab7981c8c71b4510d0cfa5a2e3160a722c2aa584f488e181f5f5cbd9479bb6

  • SSDEEP

    384:6cqbCK0l4h7o9SVyDGvENuh46/gJkOmMSW38mRvR6JZlbw8hqIusZzZzcr:930py6vhxaRpcnuWC

Score
10/10
njrathackeddiscoveryevasionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

HacKed

C2

89.156.24.108:1738

Mutex

af0aa29f43924811e1101d2b844fbfd3

Attributes
  • reg_key

    af0aa29f43924811e1101d2b844fbfd3

  • splitter

    |'|'|

Signatures

  • Njrat family
    njrat
  • njRAT/Bladabindi

    Widely used RAT written in .NET.

    trojannjrat
  • Modifies Windows Firewall 2 TTPs 1 IoCs
    evasion
  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • 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 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Suspicious use of AdjustPrivilegeToken 35 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dayum.exe
    "C:\Users\Admin\AppData\Local\Temp\dayum.exe"
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1804
    • C:\Users\Admin\AppData\Local\Temp\server.exe
      "C:\Users\Admin\AppData\Local\Temp\server.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2540
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        PID:2844

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
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

1
T1543

Windows Service

1
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

  • \Users\Admin\AppData\Local\Temp\server.exe
    Filesize

    23KB

    MD5

    aa6a3fbb8d78e21710da58d6e7b87f86

    SHA1

    09c8e4815c16a732d9842ef97fda4e347ad0ee27

    SHA256

    9af4cf4b24bdb010ba408a9c9b3f26e0c52dd6d6dd3c0a9bd12180dd9028210a

    SHA512

    724a7d8799acf7680ce0ea65e3902a0650aa9f2c635013d1e86a0dbd2ccba6ece5ab7981c8c71b4510d0cfa5a2e3160a722c2aa584f488e181f5f5cbd9479bb6

    Download Submit

  • memory/1804-0-0x0000000074BC1000-0x0000000074BC2000-memory.dmp

    Filesize

    4KB

    Download

  • memory/1804-1-0x0000000074BC0000-0x000000007516B000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1804-2-0x0000000074BC0000-0x000000007516B000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1804-11-0x0000000074BC0000-0x000000007516B000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/2540-10-0x0000000074BC0000-0x000000007516B000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/2540-13-0x0000000074BC0000-0x000000007516B000-memory.dmp

    Filesize

    5.7MB

    Download