Analysis

  • max time kernel
    130s
  • max time network
    128s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 00:39

General

  • Target

    HALKBANK.exe

  • Size

    2.8MB

  • MD5

    fe768517f29326fe6c77a2ec75ebb115

  • SHA1

    5f6996bc64096c6603ff732cf80b7a0336e75d45

  • SHA256

    283e544c4bb4dcba6f6b982e53d33bb1b2bf342314f92b144bc98f4ebafbce05

  • SHA512

    99a58f69eb138c29e2360a057536ae242b69d7c5cd1b71d06f5b9dcf3d74ecea887a6af0716f43f373c2bea3d2ab879d51526bfcc2ff74967e6c88a945ea1d14

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\AEF946DCB4\Log.txt

Family

masslogger

Ransom Note
<|| v2.1.0.0 ||> User Name: Admin IP: 127.0.0.1 Location: United States Windows OS: Microsoft Windows 7 Ultimate 64bit Windows Serial Key: D4F6K-QK3RD-TMVMJ-BBMRX-3MBMV CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 2:55:54 AM MassLogger Started: 5/21/2022 2:55:41 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| Downloader ||> Disabled <|| USB Spread ||> Disabled <|| Bot Killer ||> Disabled <|| Window Searcher ||> Disabled <|| Search And Upload ||> Disabled <|| Telegram Desktop ||> Not Installed <|| Pidgin ||> Not Installed <|| FileZilla ||> Not Installed <|| Discord Tokken ||> Not Installed <|| NordVPN ||> Not Installed <|| Outlook ||> Not Installed <|| FoxMail ||> Not Installed <|| Thunderbird ||> Not Installed <|| FireFox ||> Not Found <|| QQ Browser ||> Not Installed <|| Chromium Recovery ||> Not Installed or Not Found <|| Keylogger And Clipboard ||> Disabled

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.decoplanet.net
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    ayla1939

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • MassLogger

    Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

  • MassLogger Main Payload 10 IoCs
  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • AgentTesla Payload 6 IoCs
  • Executes dropped EXE 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 4 IoCs
  • 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 35 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\HALKBANK.exe
    "C:\Users\Admin\AppData\Local\Temp\HALKBANK.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2044
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\chromee.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\chromee.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:840
      • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
        "C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:876
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v chromee /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\chromee.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:592
      • C:\Windows\SysWOW64\reg.exe
        REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v chromee /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\chromee.exe"
        3⤵
        • Adds Run key to start application
        PID:520
    • C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
      "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1356

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
    Filesize

    40KB

    MD5

    91c9ae9c9a17a9db5e08b120e668c74c

    SHA1

    50770954c1ceb0bb6f1d5d3f2de2a0a065773723

    SHA256

    e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

    SHA512

    ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

  • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
    Filesize

    40KB

    MD5

    91c9ae9c9a17a9db5e08b120e668c74c

    SHA1

    50770954c1ceb0bb6f1d5d3f2de2a0a065773723

    SHA256

    e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

    SHA512

    ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

  • C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
    Filesize

    63KB

    MD5

    b58b926c3574d28d5b7fdd2ca3ec30d5

    SHA1

    d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

    SHA256

    6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

    SHA512

    b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

  • C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
    Filesize

    63KB

    MD5

    b58b926c3574d28d5b7fdd2ca3ec30d5

    SHA1

    d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

    SHA256

    6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

    SHA512

    b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\chromee.exe
    Filesize

    1.2MB

    MD5

    9a4460e1522d6e13d6f326674524c405

    SHA1

    d8484d2d265f4f5d83917532465210ddf658aa08

    SHA256

    0122fb26a12f86f9e8eef0498a4d7f350846885bdb8b6ced21a68baa0e73be6b

    SHA512

    0bd99764516d33191d5bf7b2c3b1f247aad039136892f39c4941c8aa07f4c1cc3935949c1d8c91ec4a28ec3125302357390df9be6187720ccdb0a97221bfa1a2

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\chromee.exe
    Filesize

    1.2MB

    MD5

    9a4460e1522d6e13d6f326674524c405

    SHA1

    d8484d2d265f4f5d83917532465210ddf658aa08

    SHA256

    0122fb26a12f86f9e8eef0498a4d7f350846885bdb8b6ced21a68baa0e73be6b

    SHA512

    0bd99764516d33191d5bf7b2c3b1f247aad039136892f39c4941c8aa07f4c1cc3935949c1d8c91ec4a28ec3125302357390df9be6187720ccdb0a97221bfa1a2

  • \Users\Admin\AppData\Local\Temp\InstallUtil.exe
    Filesize

    40KB

    MD5

    91c9ae9c9a17a9db5e08b120e668c74c

    SHA1

    50770954c1ceb0bb6f1d5d3f2de2a0a065773723

    SHA256

    e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

    SHA512

    ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

  • \Users\Admin\AppData\Local\Temp\RegAsm.exe
    Filesize

    63KB

    MD5

    b58b926c3574d28d5b7fdd2ca3ec30d5

    SHA1

    d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

    SHA256

    6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

    SHA512

    b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

  • \Users\Admin\AppData\Local\Temp\RegAsm.exe
    Filesize

    63KB

    MD5

    b58b926c3574d28d5b7fdd2ca3ec30d5

    SHA1

    d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

    SHA256

    6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

    SHA512

    b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

  • \Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\chromee.exe
    Filesize

    1.2MB

    MD5

    9a4460e1522d6e13d6f326674524c405

    SHA1

    d8484d2d265f4f5d83917532465210ddf658aa08

    SHA256

    0122fb26a12f86f9e8eef0498a4d7f350846885bdb8b6ced21a68baa0e73be6b

    SHA512

    0bd99764516d33191d5bf7b2c3b1f247aad039136892f39c4941c8aa07f4c1cc3935949c1d8c91ec4a28ec3125302357390df9be6187720ccdb0a97221bfa1a2

  • memory/520-64-0x0000000000000000-mapping.dmp
  • memory/592-63-0x0000000000000000-mapping.dmp
  • memory/840-61-0x0000000001320000-0x0000000001456000-memory.dmp
    Filesize

    1.2MB

  • memory/840-58-0x0000000000000000-mapping.dmp
  • memory/876-73-0x0000000000400000-0x000000000049A000-memory.dmp
    Filesize

    616KB

  • memory/876-88-0x0000000000400000-0x000000000049A000-memory.dmp
    Filesize

    616KB

  • memory/876-99-0x0000000002070000-0x0000000002084000-memory.dmp
    Filesize

    80KB

  • memory/876-98-0x0000000004D35000-0x0000000004D46000-memory.dmp
    Filesize

    68KB

  • memory/876-74-0x0000000000400000-0x000000000049A000-memory.dmp
    Filesize

    616KB

  • memory/876-77-0x0000000000400000-0x000000000049A000-memory.dmp
    Filesize

    616KB

  • memory/876-76-0x0000000000400000-0x000000000049A000-memory.dmp
    Filesize

    616KB

  • memory/876-96-0x00000000004B0000-0x00000000004F4000-memory.dmp
    Filesize

    272KB

  • memory/876-94-0x0000000000400000-0x000000000049A000-memory.dmp
    Filesize

    616KB

  • memory/876-92-0x0000000000400000-0x000000000049A000-memory.dmp
    Filesize

    616KB

  • memory/876-89-0x000000000049419E-mapping.dmp
  • memory/1356-84-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1356-68-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1356-67-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1356-71-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1356-82-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1356-70-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1356-79-0x0000000000446EBE-mapping.dmp
  • memory/1356-78-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/2044-56-0x0000000000440000-0x000000000044A000-memory.dmp
    Filesize

    40KB

  • memory/2044-55-0x0000000075841000-0x0000000075843000-memory.dmp
    Filesize

    8KB

  • memory/2044-65-0x00000000006A0000-0x00000000006AA000-memory.dmp
    Filesize

    40KB

  • memory/2044-54-0x0000000001030000-0x0000000001310000-memory.dmp
    Filesize

    2.9MB