Analysis

  • max time kernel
    148s
  • max time network
    33s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    15-03-2023 12:36

General

  • Target

    b368ffcb6e9405d115f30bf7742b5e61.exe

  • Size

    791KB

  • MD5

    b368ffcb6e9405d115f30bf7742b5e61

  • SHA1

    349f9aa31450f5dc605d9d087deafe98d451fb9a

  • SHA256

    6f27311fdb767f86e996137271d5765b85f24d535f2c3c9641e87ee64e463791

  • SHA512

    efbc8573b213b9d17c781e0c438779e1881d13f2be273d5fb1a4222ab06acd75caf869c1e3d59a88fe9631abe8d80266957e812c2e43bfe94a8092ec92caf5c6

  • SSDEEP

    24576:7yffjBKLiM593mxxx0GE/swVweh2lT8DH:2vMGrED2loT

Malware Config

Extracted

Family

cryptbot

C2

http://ernblt32.top/gate.php

Attributes
  • payload_url

    http:

Signatures

  • CryptBot

    A C++ stealer distributed widely in bundle with other software.

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs
  • Checks BIOS information in registry 2 TTPs 4 IoCs

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

  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Themida packer 18 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • 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 3 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b368ffcb6e9405d115f30bf7742b5e61.exe
    "C:\Users\Admin\AppData\Local\Temp\b368ffcb6e9405d115f30bf7742b5e61.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1296
    • C:\Users\Admin\AppData\Local\Temp\b368ffcb6e9405d115f30bf7742b5e61.exe
      "C:\Users\Admin\AppData\Local\Temp\b368ffcb6e9405d115f30bf7742b5e61.exe"
      2⤵
      • Maps connected drives based on registry
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1772
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c C:\Users\Admin\AppData\Roaming\886A1A2FE18A634A\ethrog.exe
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:924
        • C:\Users\Admin\AppData\Roaming\886A1A2FE18A634A\ethrog.exe
          C:\Users\Admin\AppData\Roaming\886A1A2FE18A634A\ethrog.exe
          4⤵
          • Identifies VirtualBox via ACPI registry values (likely anti-VM)
          • Checks BIOS information in registry
          • Executes dropped EXE
          • Loads dropped DLL
          • Checks whether UAC is enabled
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:324
          • C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe
            "C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe"
            5⤵
            • Identifies VirtualBox via ACPI registry values (likely anti-VM)
            • Checks BIOS information in registry
            • Executes dropped EXE
            • Checks whether UAC is enabled
            • Suspicious use of NtSetInformationThreadHideFromDebugger
            • Suspicious behavior: AddClipboardFormatListener
            • Suspicious behavior: EnumeratesProcesses
            PID:1620
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout -t 5 && del "C:\Users\Admin\AppData\Local\Temp\b368ffcb6e9405d115f30bf7742b5e61.exe"
        3⤵
        • Deletes itself
        • Suspicious use of WriteProcessMemory
        PID:1152
        • C:\Windows\SysWOW64\timeout.exe
          timeout -t 5
          4⤵
          • Delays execution with timeout.exe
          PID:428

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

5
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

5
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

2
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\9A8.tmp
    Filesize

    32B

    MD5

    502ef3f3ece4863580320144bb4def88

    SHA1

    c9b0633d81023b22bd1ac521797b853fc4ba1014

    SHA256

    5e4a980e509800ef5eba533fbfb5e7f38bd55d4b72008bb14be344a6c699a945

    SHA512

    28d53daf4f9c126cd639bb52254c70cca7198de167b64fd938168bfa22410ac6dcc5d34f740aad44d6a6eb76334a5dd422a65e7e4f6ab809df7ff4d110110228

  • C:\Users\Admin\AppData\Local\Temp\A48.tmp
    Filesize

    71KB

    MD5

    7634ebd082abbba35a8e6a300ec83c51

    SHA1

    953666e70fbed932e4bed446f1d1e432781972b7

    SHA256

    792aa1b2f647c981a8778a35717809ff0783bc4b6c022e6ed049c1029f6c584f

    SHA512

    6f95e7c7c4548ad206294e5fc13f9ed0bad9476e5775ac4e06bd324c6e0a14382fcf5f604e5899084ee2f3733405716d60842f3393d5fa174902dbb055d40f3e

  • C:\Users\Admin\AppData\Roaming\886A1A2FE18A634A\ethrog.exe
    Filesize

    2.6MB

    MD5

    ce3eac76269dbad2418ffc80324753ce

    SHA1

    32554e64820bf80f36628605ce12518eaaedc744

    SHA256

    b20cc31047dae677fe78b0ce8cb9a5745edfa42a91f5467319eddf70775ed053

    SHA512

    25a737b667d932dab0592732c098e1f555b22b7b3fd1519a8cdb1325981190047fe4969bb2f608ccaf1625a0ba87fe0d01e33f3ec5e780e2289ad0439778bf17

  • C:\Users\Admin\AppData\Roaming\886A1A2FE18A634A\ethrog.exe
    Filesize

    2.6MB

    MD5

    ce3eac76269dbad2418ffc80324753ce

    SHA1

    32554e64820bf80f36628605ce12518eaaedc744

    SHA256

    b20cc31047dae677fe78b0ce8cb9a5745edfa42a91f5467319eddf70775ed053

    SHA512

    25a737b667d932dab0592732c098e1f555b22b7b3fd1519a8cdb1325981190047fe4969bb2f608ccaf1625a0ba87fe0d01e33f3ec5e780e2289ad0439778bf17

  • C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe
    Filesize

    2.6MB

    MD5

    ce3eac76269dbad2418ffc80324753ce

    SHA1

    32554e64820bf80f36628605ce12518eaaedc744

    SHA256

    b20cc31047dae677fe78b0ce8cb9a5745edfa42a91f5467319eddf70775ed053

    SHA512

    25a737b667d932dab0592732c098e1f555b22b7b3fd1519a8cdb1325981190047fe4969bb2f608ccaf1625a0ba87fe0d01e33f3ec5e780e2289ad0439778bf17

  • \Users\Admin\AppData\Roaming\886A1A2FE18A634A\ethrog.exe
    Filesize

    2.6MB

    MD5

    ce3eac76269dbad2418ffc80324753ce

    SHA1

    32554e64820bf80f36628605ce12518eaaedc744

    SHA256

    b20cc31047dae677fe78b0ce8cb9a5745edfa42a91f5467319eddf70775ed053

    SHA512

    25a737b667d932dab0592732c098e1f555b22b7b3fd1519a8cdb1325981190047fe4969bb2f608ccaf1625a0ba87fe0d01e33f3ec5e780e2289ad0439778bf17

  • \Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe
    Filesize

    2.6MB

    MD5

    ce3eac76269dbad2418ffc80324753ce

    SHA1

    32554e64820bf80f36628605ce12518eaaedc744

    SHA256

    b20cc31047dae677fe78b0ce8cb9a5745edfa42a91f5467319eddf70775ed053

    SHA512

    25a737b667d932dab0592732c098e1f555b22b7b3fd1519a8cdb1325981190047fe4969bb2f608ccaf1625a0ba87fe0d01e33f3ec5e780e2289ad0439778bf17

  • memory/324-152-0x0000000000820000-0x0000000000F04000-memory.dmp
    Filesize

    6.9MB

  • memory/324-147-0x0000000000820000-0x0000000000F04000-memory.dmp
    Filesize

    6.9MB

  • memory/324-146-0x0000000000820000-0x0000000000F04000-memory.dmp
    Filesize

    6.9MB

  • memory/324-145-0x0000000000820000-0x0000000000F04000-memory.dmp
    Filesize

    6.9MB

  • memory/324-144-0x0000000000820000-0x0000000000F04000-memory.dmp
    Filesize

    6.9MB

  • memory/324-142-0x0000000000820000-0x0000000000F04000-memory.dmp
    Filesize

    6.9MB

  • memory/924-143-0x0000000001FE0000-0x00000000026C4000-memory.dmp
    Filesize

    6.9MB

  • memory/1620-154-0x0000000001300000-0x00000000019E4000-memory.dmp
    Filesize

    6.9MB

  • memory/1620-155-0x0000000001300000-0x00000000019E4000-memory.dmp
    Filesize

    6.9MB

  • memory/1620-160-0x0000000001300000-0x00000000019E4000-memory.dmp
    Filesize

    6.9MB

  • memory/1620-159-0x0000000001300000-0x00000000019E4000-memory.dmp
    Filesize

    6.9MB

  • memory/1620-158-0x0000000001300000-0x00000000019E4000-memory.dmp
    Filesize

    6.9MB

  • memory/1620-157-0x0000000001300000-0x00000000019E4000-memory.dmp
    Filesize

    6.9MB

  • memory/1620-156-0x0000000001300000-0x00000000019E4000-memory.dmp
    Filesize

    6.9MB

  • memory/1772-58-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1772-62-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1772-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
    Filesize

    4KB

  • memory/1772-54-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1772-60-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1772-59-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1772-64-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1772-65-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1772-56-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1772-57-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1772-137-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1772-55-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB