Overview

overview

10

Static

static

10

tmpE1B.tmp.exe

windows7_x64

10

tmpE1B.tmp.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    18-06-2022 20:56

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General

  • Target

    tmpE1B.tmp.exe

  • Size

    37KB

  • MD5

    73196f394725a9623d84a512cdddf6ce

  • SHA1

    4d24d92f70b2cbce52b1b173162b8f504ee7752f

  • SHA256

    ee4ab4017c6e9c0883b2c1e42d0f0264f178ad2c6416e07d77169fdf94d1b1a4

  • SHA512

    9c7d00237665f6a1df06217d156cbf07e499f60a7b4eb807b2df107f7392d710cb2439d524827b50492578c652ba20b81f95e4e0eee9f144330847f041971ed6

Score
10/10
njratnextevasionpersistencetrojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

NEXT

C2

109.197.196.135:9991

Mutex

413491cbe232876548b9b7cd8a1b451d

Attributes
  • reg_key

    413491cbe232876548b9b7cd8a1b451d

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

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

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 19 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpE1B.tmp.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpE1B.tmp.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:908
    • C:\Users\Admin\AppData\Roaming\dllhost.exe
      "C:\Users\Admin\AppData\Roaming\dllhost.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Drops autorun.inf file
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1928
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\dllhost.exe" "dllhost.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:1136

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Replication Through Removable Media

1
T1091

Execution

Persistence

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Modify Registry

1
T1112

Credential Access

Discovery

System Information Discovery

1
T1082

Lateral Movement

Replication Through Removable Media

1
T1091

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\dllhost.exe
    Filesize

    37KB

    MD5

    73196f394725a9623d84a512cdddf6ce

    SHA1

    4d24d92f70b2cbce52b1b173162b8f504ee7752f

    SHA256

    ee4ab4017c6e9c0883b2c1e42d0f0264f178ad2c6416e07d77169fdf94d1b1a4

    SHA512

    9c7d00237665f6a1df06217d156cbf07e499f60a7b4eb807b2df107f7392d710cb2439d524827b50492578c652ba20b81f95e4e0eee9f144330847f041971ed6

    Download Submit
  • C:\Users\Admin\AppData\Roaming\dllhost.exe
    Filesize

    37KB

    MD5

    73196f394725a9623d84a512cdddf6ce

    SHA1

    4d24d92f70b2cbce52b1b173162b8f504ee7752f

    SHA256

    ee4ab4017c6e9c0883b2c1e42d0f0264f178ad2c6416e07d77169fdf94d1b1a4

    SHA512

    9c7d00237665f6a1df06217d156cbf07e499f60a7b4eb807b2df107f7392d710cb2439d524827b50492578c652ba20b81f95e4e0eee9f144330847f041971ed6

    Download Submit
  • \Users\Admin\AppData\Roaming\dllhost.exe
    Filesize

    37KB

    MD5

    73196f394725a9623d84a512cdddf6ce

    SHA1

    4d24d92f70b2cbce52b1b173162b8f504ee7752f

    SHA256

    ee4ab4017c6e9c0883b2c1e42d0f0264f178ad2c6416e07d77169fdf94d1b1a4

    SHA512

    9c7d00237665f6a1df06217d156cbf07e499f60a7b4eb807b2df107f7392d710cb2439d524827b50492578c652ba20b81f95e4e0eee9f144330847f041971ed6

    Download Submit
  • memory/908-54-0x00000000756A1000-0x00000000756A3000-memory.dmp
    Filesize

    8KB

    Download
  • memory/908-55-0x0000000074A50000-0x0000000074FFB000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/908-61-0x0000000074A50000-0x0000000074FFB000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/1136-63-0x0000000000000000-mapping.dmp
    Download
  • memory/1928-57-0x0000000000000000-mapping.dmp
    Download
  • memory/1928-62-0x0000000074A50000-0x0000000074FFB000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/1928-65-0x0000000074A50000-0x0000000074FFB000-memory.dmp
    Filesize

    5.7MB

    Download