Analysis

  • max time kernel
    119s
  • max time network
    139s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    04-11-2021 09:39

General

  • Target

    doc3723636638837373344.exe

  • Size

    546KB

  • MD5

    bb0f727180c9b29e51c9ab2a9b4c539c

  • SHA1

    ccd4d7a83603d2471aabb0caf2e1196b9193b586

  • SHA256

    2b6b5926ec7e5d6acea355bbd8f43a89850ed85e0c3739edfad2608ead9f1573

  • SHA512

    ce0670de14582f900b89149cb63fdfe171d188a1a7752d72ed068e57775c54557817acd09148d93725bd52456ed901de8e6b6d0fec0d064b24b46fa8dab7e5d5

Malware Config

Extracted

Family

blustealer

Credentials

  • Protocol:
    smtp
  • Host:
    mail.yekamuhendislik.com
  • Port:
    587
  • Username:
    [email protected]
  • 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\doc3723636638837373344.exe
    "C:\Users\Admin\AppData\Local\Temp\doc3723636638837373344.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:968
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ARXXSy" /XML "C:\Users\Admin\AppData\Local\Temp\tmpAE1A.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1200
    • C:\Users\Admin\AppData\Local\Temp\doc3723636638837373344.exe
      "C:\Users\Admin\AppData\Local\Temp\doc3723636638837373344.exe"
      2⤵
      • Loads dropped DLL
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:848
      • 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:1252

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/848-68-0x0000000000080000-0x000000000008A000-memory.dmp
    Filesize

    40KB

  • memory/848-61-0x0000000000400000-0x0000000000456000-memory.dmp
    Filesize

    344KB

  • memory/848-62-0x0000000000400000-0x0000000000456000-memory.dmp
    Filesize

    344KB

  • memory/848-63-0x0000000000400000-0x0000000000456000-memory.dmp
    Filesize

    344KB

  • memory/848-65-0x0000000000400000-0x0000000000456000-memory.dmp
    Filesize

    344KB

  • memory/848-66-0x0000000000401B9C-mapping.dmp
  • memory/848-67-0x0000000000080000-0x0000000000086000-memory.dmp
    Filesize

    24KB

  • memory/848-70-0x0000000000400000-0x0000000000456000-memory.dmp
    Filesize

    344KB

  • memory/968-59-0x00000000055F0000-0x0000000005669000-memory.dmp
    Filesize

    484KB

  • memory/968-54-0x0000000001120000-0x0000000001121000-memory.dmp
    Filesize

    4KB

  • memory/968-58-0x0000000004C60000-0x0000000004C61000-memory.dmp
    Filesize

    4KB

  • memory/968-57-0x00000000003D0000-0x00000000003D6000-memory.dmp
    Filesize

    24KB

  • memory/968-56-0x0000000074B91000-0x0000000074B93000-memory.dmp
    Filesize

    8KB

  • memory/1200-60-0x0000000000000000-mapping.dmp
  • memory/1252-72-0x0000000000000000-mapping.dmp
  • memory/1252-75-0x0000000000890000-0x0000000000891000-memory.dmp
    Filesize

    4KB

  • memory/1252-77-0x000000001A800000-0x000000001A802000-memory.dmp
    Filesize

    8KB