Analysis

  • max time kernel
    150s
  • max time network
    33s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    16-03-2023 06:31

General

  • Target

    e1c77078463da33af7cfe8ddd17942773df369903b5b92cd92c090fc5749e17d.exe

  • Size

    791KB

  • MD5

    1aac0226a0d55102bf3c84eaa49de03a

  • SHA1

    717b745bb437ac0cfd57a4f64fdb576ec0987166

  • SHA256

    e1c77078463da33af7cfe8ddd17942773df369903b5b92cd92c090fc5749e17d

  • SHA512

    a4a0aa6393d278abec397cd532232e93da6c8bd13679e38d94adea9e0ebcc803cecc7bf93552f32de5cad127709380e67583be4b788b6026b5306bdfdf645eae

  • SSDEEP

    12288:hmshgxF9wR04Uu6xhjlNLuNs9KEzmOpru+OSwOAjUkNZ6Zui3tuC3eUqaIQCDuH:XhOF2RO/XX9HyOdYbZ6ZeZcC6H

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 20 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\e1c77078463da33af7cfe8ddd17942773df369903b5b92cd92c090fc5749e17d.exe
    "C:\Users\Admin\AppData\Local\Temp\e1c77078463da33af7cfe8ddd17942773df369903b5b92cd92c090fc5749e17d.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1128
    • C:\Users\Admin\AppData\Local\Temp\e1c77078463da33af7cfe8ddd17942773df369903b5b92cd92c090fc5749e17d.exe
      "C:\Users\Admin\AppData\Local\Temp\e1c77078463da33af7cfe8ddd17942773df369903b5b92cd92c090fc5749e17d.exe"
      2⤵
      • Maps connected drives based on registry
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1360
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c C:\Users\Admin\AppData\Roaming\C7623F2C0CF23520\ethrog.exe
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1656
        • C:\Users\Admin\AppData\Roaming\C7623F2C0CF23520\ethrog.exe
          C:\Users\Admin\AppData\Roaming\C7623F2C0CF23520\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:1620
          • 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:1592
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout -t 5 && del "C:\Users\Admin\AppData\Local\Temp\e1c77078463da33af7cfe8ddd17942773df369903b5b92cd92c090fc5749e17d.exe"
        3⤵
        • Deletes itself
        • Suspicious use of WriteProcessMemory
        PID:1884
        • C:\Windows\SysWOW64\timeout.exe
          timeout -t 5
          4⤵
          • Delays execution with timeout.exe
          PID:608

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\A8.tmp
    Filesize

    71KB

    MD5

    6082dd13ad8102d17f9db9cd07600e97

    SHA1

    39becc88cea914d843b3c5521038907f2f2f4e71

    SHA256

    40a3f938c8c1eb929771c444d5f8887c42c7cde6281690e2071a2593ba92e48a

    SHA512

    b7d5c716b6339b3138492c8b0cf4c9540a8d8224f9d5e72e34ceab442bdfa9c855473bbed68a489851f019461e1b1f9d86baf067be556c67b948c930899d3c1e

  • C:\Users\Admin\AppData\Local\Temp\FFE8.tmp
    Filesize

    32B

    MD5

    48255136fc205998b4ebbe6f72b5cdd0

    SHA1

    c6f2c7fdd75a999a61ddfb5b4923d6a0dad917b1

    SHA256

    00523df8a35803806212867d9f6ab89d17a1bfdd3aef5fbb1dc10fcd6faa114c

    SHA512

    c74a7e214f93d124aed393e00f720ac91ca46328f4edf710b26235145b676003261943e4779acbc52ef14667a78636968c04c1065ac5cc70ba9f54d6ab0226de

  • C:\Users\Admin\AppData\Roaming\C7623F2C0CF23520\ethrog.exe
    Filesize

    2.6MB

    MD5

    ce3eac76269dbad2418ffc80324753ce

    SHA1

    32554e64820bf80f36628605ce12518eaaedc744

    SHA256

    b20cc31047dae677fe78b0ce8cb9a5745edfa42a91f5467319eddf70775ed053

    SHA512

    25a737b667d932dab0592732c098e1f555b22b7b3fd1519a8cdb1325981190047fe4969bb2f608ccaf1625a0ba87fe0d01e33f3ec5e780e2289ad0439778bf17

  • C:\Users\Admin\AppData\Roaming\C7623F2C0CF23520\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\C7623F2C0CF23520\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/1360-54-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1360-62-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1360-64-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1360-65-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1360-60-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1360-59-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1360-137-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1360-58-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1360-57-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1360-56-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1360-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
    Filesize

    4KB

  • memory/1360-55-0x0000000000400000-0x00000000004CB000-memory.dmp
    Filesize

    812KB

  • memory/1592-156-0x00000000010E0000-0x00000000017C4000-memory.dmp
    Filesize

    6.9MB

  • memory/1592-155-0x00000000010E0000-0x00000000017C4000-memory.dmp
    Filesize

    6.9MB

  • memory/1592-162-0x00000000010E0000-0x00000000017C4000-memory.dmp
    Filesize

    6.9MB

  • memory/1592-161-0x00000000010E0000-0x00000000017C4000-memory.dmp
    Filesize

    6.9MB

  • memory/1592-160-0x00000000010E0000-0x00000000017C4000-memory.dmp
    Filesize

    6.9MB

  • memory/1592-159-0x00000000010E0000-0x00000000017C4000-memory.dmp
    Filesize

    6.9MB

  • memory/1592-158-0x00000000010E0000-0x00000000017C4000-memory.dmp
    Filesize

    6.9MB

  • memory/1592-157-0x00000000010E0000-0x00000000017C4000-memory.dmp
    Filesize

    6.9MB

  • memory/1620-148-0x0000000000BC0000-0x00000000012A4000-memory.dmp
    Filesize

    6.9MB

  • memory/1620-143-0x0000000000BC0000-0x00000000012A4000-memory.dmp
    Filesize

    6.9MB

  • memory/1620-153-0x0000000000BC0000-0x00000000012A4000-memory.dmp
    Filesize

    6.9MB

  • memory/1620-144-0x0000000000BC0000-0x00000000012A4000-memory.dmp
    Filesize

    6.9MB

  • memory/1620-145-0x0000000000BC0000-0x00000000012A4000-memory.dmp
    Filesize

    6.9MB

  • memory/1620-147-0x0000000000BC0000-0x00000000012A4000-memory.dmp
    Filesize

    6.9MB

  • memory/1620-146-0x0000000000BC0000-0x00000000012A4000-memory.dmp
    Filesize

    6.9MB

  • memory/1656-142-0x0000000002110000-0x00000000027F4000-memory.dmp
    Filesize

    6.9MB