Analysis

  • max time kernel
    131s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-03-2024 19:16

General

  • Target

    REMITTANCE COPY.exe

  • Size

    935KB

  • MD5

    c4c5220498e9618df1443285a8bcd048

  • SHA1

    e8f0b41c0eb27aaa8f3a552513ca7145a241fe91

  • SHA256

    99f730c18a5d4a5bb442c5b7045bf38f2aa183a7c9121ee60ce7bb345510557f

  • SHA512

    cf9515514500c7ec674390aa30cdfb15960167dbe99164de757762b5d0fda913e442be2cfd4420b2c2f5a942c9ebdb5efb5619010245cfc93b83aec741a03b59

  • SSDEEP

    6144:bCw9AapDnOzrN9J6Uq4/TC8lDBjyaMqr4zyUHVIB8NafdOUJq3WC1NfCBmCrnrIK:b59p91Ubr1WlqTiV1NnUJq3WQfCGcT3

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.westviewcargos.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Choice@@@12345

Signatures

  • AgentTesla

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

  • AgentTesla payload 1 IoCs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
  • Looks for VMWare Tools registry key 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • 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
  • Adds Run key to start application 2 TTPs 1 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 SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\REMITTANCE COPY.exe
    "C:\Users\Admin\AppData\Local\Temp\REMITTANCE COPY.exe"
    1⤵
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Checks computer location settings
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1040
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\zcvmximsXc" /XML "C:\Users\Admin\AppData\Local\Temp\tmpDE79.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1144
    • C:\Users\Admin\AppData\Local\Temp\REMITTANCE COPY.exe
      "{path}"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • outlook_office_path
      • outlook_win_path
      PID:4056

Network

MITRE ATT&CK Matrix ATT&CK v13

Execution

Scheduled Task/Job

1
T1053

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

4
T1552

Credentials In Files

3
T1552.001

Credentials in Registry

1
T1552.002

Discovery

Query Registry

5
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

4
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

4
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\REMITTANCE COPY.exe.log
    Filesize

    1KB

    MD5

    3aea5c16a0e7b995983bd1771d5ea11d

    SHA1

    5ce845c82ace7946cec271a8bac45572b977419c

    SHA256

    8d7143472e7cf3a40f46c6346251661e10fe3a932321cff14190648ee3d9c02f

    SHA512

    4d0949cc3c0b7bc19b94a7166fb1a528c5833773b4b577f1730c4aab93ec03f3d72714ebf8a103f2a6ab4f97abef2945e78c91d464885fb4f1f9c584d7a1b243

  • C:\Users\Admin\AppData\Local\Temp\tmpDE79.tmp
    Filesize

    1KB

    MD5

    3c874168781ea0d17ccd085ebd823380

    SHA1

    e019fd2c4452629423893d93841d01c99ee5f195

    SHA256

    24a278bce57414357f504a010f479f938fd3dc21e994b622eb2ef2ba93baaadf

    SHA512

    aaf20825cc5ef2990421caea9edc8ef7df7196c56056ea5270b0e02adb85c8b504a58c15d5d359b700b6de442e24f7fde44a1c142825985a23fd6a4e92107cff

  • memory/1040-12-0x000000000E970000-0x000000000E9D6000-memory.dmp
    Filesize

    408KB

  • memory/1040-4-0x0000000004FA0000-0x000000000503C000-memory.dmp
    Filesize

    624KB

  • memory/1040-2-0x00000000054B0000-0x0000000005A54000-memory.dmp
    Filesize

    5.6MB

  • memory/1040-5-0x0000000005150000-0x0000000005160000-memory.dmp
    Filesize

    64KB

  • memory/1040-6-0x0000000004ED0000-0x0000000004EDA000-memory.dmp
    Filesize

    40KB

  • memory/1040-7-0x0000000004850000-0x0000000004864000-memory.dmp
    Filesize

    80KB

  • memory/1040-8-0x0000000075380000-0x0000000075B30000-memory.dmp
    Filesize

    7.7MB

  • memory/1040-9-0x0000000005150000-0x0000000005160000-memory.dmp
    Filesize

    64KB

  • memory/1040-0-0x0000000000350000-0x0000000000440000-memory.dmp
    Filesize

    960KB

  • memory/1040-11-0x00000000074D0000-0x000000000750E000-memory.dmp
    Filesize

    248KB

  • memory/1040-20-0x0000000075380000-0x0000000075B30000-memory.dmp
    Filesize

    7.7MB

  • memory/1040-3-0x0000000004E10000-0x0000000004EA2000-memory.dmp
    Filesize

    584KB

  • memory/1040-10-0x0000000006450000-0x00000000064D4000-memory.dmp
    Filesize

    528KB

  • memory/1040-1-0x0000000075380000-0x0000000075B30000-memory.dmp
    Filesize

    7.7MB

  • memory/4056-19-0x0000000075380000-0x0000000075B30000-memory.dmp
    Filesize

    7.7MB

  • memory/4056-27-0x0000000005690000-0x00000000056A0000-memory.dmp
    Filesize

    64KB

  • memory/4056-21-0x0000000005690000-0x00000000056A0000-memory.dmp
    Filesize

    64KB

  • memory/4056-22-0x0000000005670000-0x0000000005688000-memory.dmp
    Filesize

    96KB

  • memory/4056-24-0x0000000075380000-0x0000000075B30000-memory.dmp
    Filesize

    7.7MB

  • memory/4056-25-0x0000000005690000-0x00000000056A0000-memory.dmp
    Filesize

    64KB

  • memory/4056-26-0x00000000068F0000-0x0000000006940000-memory.dmp
    Filesize

    320KB

  • memory/4056-16-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB