Analysis

  • max time kernel
    151s
  • max time network
    100s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-05-2022 22:11

General

  • Target

    1f399125ae166a61b9715467bad99e63466e9d68860f29442479d4dd179577d6.exe

  • Size

    43KB

  • MD5

    641bf525a313f41f133cd1db2d07da2b

  • SHA1

    2da56f55034be144ba85cc9c83af4f09aa591c9e

  • SHA256

    1f399125ae166a61b9715467bad99e63466e9d68860f29442479d4dd179577d6

  • SHA512

    4921b7ebc833558546b382d8c904628b25176f4580cbc38f4eb4271722f63486dfea56da5b5645b3c18f8893ef552c87309802ae6ccb17dda181ccad329fb5cb

Malware Config

Extracted

Family

njrat

Version

Njrat 0.7 Golden By Hassan Amiri

Botnet

HacKed

C2

127.0.0.1:5552

Mutex

Windows Update

Attributes
  • reg_key

    Windows Update

  • splitter

    |Hassan|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Executes dropped EXE 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 29 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1f399125ae166a61b9715467bad99e63466e9d68860f29442479d4dd179577d6.exe
    "C:\Users\Admin\AppData\Local\Temp\1f399125ae166a61b9715467bad99e63466e9d68860f29442479d4dd179577d6.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of WriteProcessMemory
    PID:1544
    • C:\Users\Admin\AppData\Local\Temp\pashat.exe
      "C:\Users\Admin\AppData\Local\Temp\pashat.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1980
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /sc minute /mo 1 /tn Server /tr C:\Users\Admin\AppData\Local\Temp/Server.exe
        3⤵
        • Creates scheduled task(s)
        PID:3884
  • C:\Users\Admin\AppData\Local\Temp\Server.exe
    C:\Users\Admin\AppData\Local\Temp/Server.exe
    1⤵
    • Executes dropped EXE
    PID:688
  • C:\Users\Admin\AppData\Local\Temp\Server.exe
    C:\Users\Admin\AppData\Local\Temp/Server.exe
    1⤵
    • Executes dropped EXE
    PID:3980

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Server.exe.log
    Filesize

    507B

    MD5

    25d1b50e7c0d451f3d850eb54d27ca05

    SHA1

    a238807715c70a335f54e80d4855644b21a9e870

    SHA256

    650faa13e983c9046c9030f63a5fa1c33900432ec7cb3762e015da2e7c5b34a5

    SHA512

    4223a26b2fabefdf1c01443ccc7bd887464d27f02694379895a040c66db472d541218d501f1c01e1bd31012d079a31baf24e20882c32cf652a09a74e3bf385f5

  • C:\Users\Admin\AppData\Local\Temp\Server.exe
    Filesize

    43KB

    MD5

    641bf525a313f41f133cd1db2d07da2b

    SHA1

    2da56f55034be144ba85cc9c83af4f09aa591c9e

    SHA256

    1f399125ae166a61b9715467bad99e63466e9d68860f29442479d4dd179577d6

    SHA512

    4921b7ebc833558546b382d8c904628b25176f4580cbc38f4eb4271722f63486dfea56da5b5645b3c18f8893ef552c87309802ae6ccb17dda181ccad329fb5cb

  • C:\Users\Admin\AppData\Local\Temp\Server.exe
    Filesize

    43KB

    MD5

    641bf525a313f41f133cd1db2d07da2b

    SHA1

    2da56f55034be144ba85cc9c83af4f09aa591c9e

    SHA256

    1f399125ae166a61b9715467bad99e63466e9d68860f29442479d4dd179577d6

    SHA512

    4921b7ebc833558546b382d8c904628b25176f4580cbc38f4eb4271722f63486dfea56da5b5645b3c18f8893ef552c87309802ae6ccb17dda181ccad329fb5cb

  • C:\Users\Admin\AppData\Local\Temp\Server.exe
    Filesize

    43KB

    MD5

    641bf525a313f41f133cd1db2d07da2b

    SHA1

    2da56f55034be144ba85cc9c83af4f09aa591c9e

    SHA256

    1f399125ae166a61b9715467bad99e63466e9d68860f29442479d4dd179577d6

    SHA512

    4921b7ebc833558546b382d8c904628b25176f4580cbc38f4eb4271722f63486dfea56da5b5645b3c18f8893ef552c87309802ae6ccb17dda181ccad329fb5cb

  • C:\Users\Admin\AppData\Local\Temp\pashat.exe
    Filesize

    43KB

    MD5

    641bf525a313f41f133cd1db2d07da2b

    SHA1

    2da56f55034be144ba85cc9c83af4f09aa591c9e

    SHA256

    1f399125ae166a61b9715467bad99e63466e9d68860f29442479d4dd179577d6

    SHA512

    4921b7ebc833558546b382d8c904628b25176f4580cbc38f4eb4271722f63486dfea56da5b5645b3c18f8893ef552c87309802ae6ccb17dda181ccad329fb5cb

  • C:\Users\Admin\AppData\Local\Temp\pashat.exe
    Filesize

    43KB

    MD5

    641bf525a313f41f133cd1db2d07da2b

    SHA1

    2da56f55034be144ba85cc9c83af4f09aa591c9e

    SHA256

    1f399125ae166a61b9715467bad99e63466e9d68860f29442479d4dd179577d6

    SHA512

    4921b7ebc833558546b382d8c904628b25176f4580cbc38f4eb4271722f63486dfea56da5b5645b3c18f8893ef552c87309802ae6ccb17dda181ccad329fb5cb

  • memory/1544-133-0x0000000000680000-0x0000000000692000-memory.dmp
    Filesize

    72KB

  • memory/1544-136-0x0000000005460000-0x00000000054F2000-memory.dmp
    Filesize

    584KB

  • memory/1544-135-0x0000000005970000-0x0000000005F14000-memory.dmp
    Filesize

    5.6MB

  • memory/1544-134-0x0000000005050000-0x00000000050EC000-memory.dmp
    Filesize

    624KB

  • memory/1980-141-0x0000000005B20000-0x0000000005B2A000-memory.dmp
    Filesize

    40KB

  • memory/1980-137-0x0000000000000000-mapping.dmp
  • memory/3884-140-0x0000000000000000-mapping.dmp