Analysis

  • max time kernel
    31s
  • max time network
    34s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    21-02-2023 07:58

General

  • Target

    0742e1fa7a28f6e01b762d6bea8cdcd69f7df76e3c9b7cbee2f0ec597df96537.exe

  • Size

    79KB

  • MD5

    125dcf998b3001997c02c5fe3f046160

  • SHA1

    cb533b20cbf7cc196e0f52a3ba05a8b51b0bde14

  • SHA256

    0742e1fa7a28f6e01b762d6bea8cdcd69f7df76e3c9b7cbee2f0ec597df96537

  • SHA512

    bcf4237327d259a2e788fd2b6c8a71713c7397a96e09199fd0214ecd60826e490bb67920d3189c671f09c6a6bf91297396f1b36317b1298831ef504bfeac79f3

  • SSDEEP

    1536:2CTjSdlEGKu/2OnbhTuuNfX9VrAu6niNDK5BvrXFGh2iIiWAh:2CTmrk9OnlCuNfbrL6iNDK5hXFQTI+

Malware Config

Signatures

  • Blackmoon, KrBanker

    Blackmoon also known as KrBanker is banking trojan first discovered in early 2014.

  • Detect Blackmoon payload 9 IoCs
  • Gh0st RAT payload 1 IoCs
  • Gh0strat

    Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.

  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 41 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0742e1fa7a28f6e01b762d6bea8cdcd69f7df76e3c9b7cbee2f0ec597df96537.exe
    "C:\Users\Admin\AppData\Local\Temp\0742e1fa7a28f6e01b762d6bea8cdcd69f7df76e3c9b7cbee2f0ec597df96537.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Enumerates connected drives
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: RenamesItself
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:1116
    • C:\Windows\SysWOW64\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\0742e1fa7a28f6e01b762d6bea8cdcd69f7df76e3c9b7cbee2f0ec597df96537.txt
      2⤵
      • Opens file in notepad (likely ransom note)
      PID:1996

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Discovery

Query Registry

2
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

3
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\0742e1fa7a28f6e01b762d6bea8cdcd69f7df76e3c9b7cbee2f0ec597df96537.txt
    Filesize

    120KB

    MD5

    3aea5b78bac5359a799c2714fecccd1a

    SHA1

    5d3203b328ecfc7a55c0ded1032d209e9f273367

    SHA256

    c05e763cab67cf9daf5be7a6a6cff2650223987a9693eaa119f69b2bbb6df6c3

    SHA512

    9513cc84a7ed3dd709d4affb03f6e286dcd43e82f33441c00a9d74d2b45449f2ee20baa8db46218d7a59d9e62fb7f95050ea305166e70f3e71dde39ccf07b6d3

  • C:\Users\Public\Documents\sjsw.log
    Filesize

    198B

    MD5

    9b3bd510bb2dd9c15f9073067e61619e

    SHA1

    cb5bcb7c3bbeea93c6bacabeb6e0b17772fb2f56

    SHA256

    a2809e4a1ddc32218e8ed31ba268f5f9e4450874d0e31b1866811bf8d22bacf9

    SHA512

    ca48ceeb9bea229e6200a9e038364ae9f3603d19205018a33252cb61afb027de73c86cddc00d8f6af425bc3bc4a4769ae39ccb62c3a6988e9f22018cc71a5477

  • \Users\Public\Documents\sttr.dll
    Filesize

    2KB

    MD5

    7943effe67a4647e06def2348949020e

    SHA1

    eabd561f0639a975de259633f63896d82c3f878d

    SHA256

    3fac47db92d581b2daef7a4f9493be2fe441041e5158101d80873d05808d5cfa

    SHA512

    c9db1962e7457c94426c2a5c7f439736697d4399db6982c45357459d58805daa4a9d297912135488b6990e265ffa59d687fd5ba43717aab46ccc212083ef5003

  • memory/1116-62-0x0000000002810000-0x0000000002876000-memory.dmp
    Filesize

    408KB

  • memory/1116-87-0x00000000037C0000-0x00000000038AC000-memory.dmp
    Filesize

    944KB

  • memory/1116-56-0x0000000000400000-0x0000000000442000-memory.dmp
    Filesize

    264KB

  • memory/1116-61-0x0000000002810000-0x0000000002876000-memory.dmp
    Filesize

    408KB

  • memory/1116-64-0x0000000002810000-0x0000000002876000-memory.dmp
    Filesize

    408KB

  • memory/1116-65-0x0000000000270000-0x0000000000273000-memory.dmp
    Filesize

    12KB

  • memory/1116-55-0x0000000000400000-0x0000000000442000-memory.dmp
    Filesize

    264KB

  • memory/1116-54-0x0000000000400000-0x0000000000442000-memory.dmp
    Filesize

    264KB

  • memory/1116-86-0x00000000037C0000-0x00000000038AC000-memory.dmp
    Filesize

    944KB

  • memory/1116-57-0x0000000000400000-0x0000000000442000-memory.dmp
    Filesize

    264KB

  • memory/1116-88-0x0000000000400000-0x0000000000427000-memory.dmp
    Filesize

    156KB

  • memory/1116-89-0x00000000037C0000-0x00000000038AC000-memory.dmp
    Filesize

    944KB

  • memory/1116-90-0x0000000010000000-0x0000000010017000-memory.dmp
    Filesize

    92KB

  • memory/1116-93-0x0000000000400000-0x0000000000427000-memory.dmp
    Filesize

    156KB

  • memory/1116-103-0x0000000002810000-0x0000000002876000-memory.dmp
    Filesize

    408KB

  • memory/1116-104-0x0000000002810000-0x0000000002876000-memory.dmp
    Filesize

    408KB

  • memory/1116-107-0x0000000000400000-0x0000000000427000-memory.dmp
    Filesize

    156KB