Analysis

  • max time kernel
    122s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-en-20211014
  • submitted
    03-11-2021 09:28

General

  • Target

    Burgan Bank Hesap Ozeti.exe

  • Size

    618KB

  • MD5

    b741d275962b6a594401b03e6f8c258f

  • SHA1

    f69fc6c731cec9c189972d646f98ffd142e69610

  • SHA256

    039676543cb62a651daa0570029334af7e19b6c2f2b5b3a083f1a7d6ebd3143e

  • SHA512

    fb29439220b9d7159bff17017e5e1d894ba287249160ba8fcf94c2e52d277a89805f82b9230f2a62e16a2f7578726d87e34892f026a084aeea5d1a04e2fbb5a3

Malware Config

Extracted

Family

blustealer

Credentials

  • Protocol:
    smtp
  • Host:
    mail.yekamuhendislik.com
  • Port:
    587
  • Username:
    muhasebe@yekamuhendislik.com
  • Password:
    MuhasebE123*

Signatures

  • A310logger

    A310 Logger is a .NET stealer/logger targeting passwords from browsers and email clients.

  • BluStealer

    A Modular information stealer written in Visual Basic.

  • A310logger Executable 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads local data of messenger clients 2 TTPs

    Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 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.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Burgan Bank Hesap Ozeti.exe
    "C:\Users\Admin\AppData\Local\Temp\Burgan Bank Hesap Ozeti.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1600
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\dkPditXZy" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE5AE.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:824
    • C:\Users\Admin\AppData\Local\Temp\Burgan Bank Hesap Ozeti.exe
      "C:\Users\Admin\AppData\Local\Temp\Burgan Bank Hesap Ozeti.exe"
      2⤵
      • Loads dropped DLL
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1576
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\Fox.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\Fox.exe
        3⤵
        • Executes dropped EXE
        • Accesses Microsoft Outlook profiles
        • outlook_office_path
        • outlook_win_path
        PID:1204

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Credential Access

Credentials in Files

2
T1081

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

2
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\Fox.exe
    MD5

    91b41651e6e9ab352805c6d35a297d08

    SHA1

    11b8eaa7b7941461bc952b11ec3f07d25dcd1c2e

    SHA256

    0872abe29cc9231cdded3a44e02a7ea17f09cf2ac2bdbd7077065858829c3723

    SHA512

    b0b0d73f6ac7b6e9b39db0fa58931873143f6559c3b8d3db2d82d453045f75da94f3236b6c6c5200b52af6cacc038565eb2e9c6a834608dac0b0e8bb45b1e892

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\Fox.exe
    MD5

    91b41651e6e9ab352805c6d35a297d08

    SHA1

    11b8eaa7b7941461bc952b11ec3f07d25dcd1c2e

    SHA256

    0872abe29cc9231cdded3a44e02a7ea17f09cf2ac2bdbd7077065858829c3723

    SHA512

    b0b0d73f6ac7b6e9b39db0fa58931873143f6559c3b8d3db2d82d453045f75da94f3236b6c6c5200b52af6cacc038565eb2e9c6a834608dac0b0e8bb45b1e892

  • \Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\Fox.exe
    MD5

    91b41651e6e9ab352805c6d35a297d08

    SHA1

    11b8eaa7b7941461bc952b11ec3f07d25dcd1c2e

    SHA256

    0872abe29cc9231cdded3a44e02a7ea17f09cf2ac2bdbd7077065858829c3723

    SHA512

    b0b0d73f6ac7b6e9b39db0fa58931873143f6559c3b8d3db2d82d453045f75da94f3236b6c6c5200b52af6cacc038565eb2e9c6a834608dac0b0e8bb45b1e892

  • memory/824-61-0x0000000000000000-mapping.dmp
  • memory/1204-73-0x0000000000000000-mapping.dmp
  • memory/1204-76-0x00000000009A0000-0x00000000009A1000-memory.dmp
    Filesize

    4KB

  • memory/1204-78-0x000000001B3C0000-0x000000001B3C2000-memory.dmp
    Filesize

    8KB

  • memory/1576-68-0x0000000000180000-0x0000000000186000-memory.dmp
    Filesize

    24KB

  • memory/1576-64-0x0000000000400000-0x0000000000456000-memory.dmp
    Filesize

    344KB

  • memory/1576-66-0x0000000000400000-0x0000000000456000-memory.dmp
    Filesize

    344KB

  • memory/1576-67-0x0000000000401B9C-mapping.dmp
  • memory/1576-69-0x0000000000180000-0x000000000018A000-memory.dmp
    Filesize

    40KB

  • memory/1576-71-0x0000000000400000-0x0000000000456000-memory.dmp
    Filesize

    344KB

  • memory/1576-63-0x0000000000400000-0x0000000000456000-memory.dmp
    Filesize

    344KB

  • memory/1576-62-0x0000000000400000-0x0000000000456000-memory.dmp
    Filesize

    344KB

  • memory/1600-60-0x00000000054F0000-0x000000000556A000-memory.dmp
    Filesize

    488KB

  • memory/1600-59-0x00000000009B0000-0x00000000009B6000-memory.dmp
    Filesize

    24KB

  • memory/1600-55-0x0000000000A60000-0x0000000000A61000-memory.dmp
    Filesize

    4KB

  • memory/1600-58-0x0000000004C80000-0x0000000004C81000-memory.dmp
    Filesize

    4KB

  • memory/1600-57-0x00000000754A1000-0x00000000754A3000-memory.dmp
    Filesize

    8KB