Analysis

  • max time kernel
    139s
  • max time network
    178s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-05-2022 22:16

General

  • Target

    JSW_NEW_.exe

  • Size

    668KB

  • MD5

    de22b1990fa4f5205caae6bd67a0cf84

  • SHA1

    44c8909d92f225b28ec9c518eff7b33b88f51081

  • SHA256

    04a9ddb426b6bc9febd1f0fdf436cde01976a37b8c99fbbabbd0076ac4a0be92

  • SHA512

    7b41bf85a67b1ca989f9551a7ba162b22579c9decb7acf3a86cf801448148da5bb4a195edb33e4f6e0ae2be8b85d98c9305f90eceab1ab64b2d34f89a7807c06

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.orientalkuwait.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Operatingmanager1&

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.orientalkuwait.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Operatingmanager1&

Signatures

  • AgentTesla

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

  • AgentTesla Payload 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\JSW_NEW_.exe
    "C:\Users\Admin\AppData\Local\Temp\JSW_NEW_.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3992
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\snmsrLq" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC0A0.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:536
    • C:\Users\Admin\AppData\Local\Temp\JSW_NEW_.exe
      "C:\Users\Admin\AppData\Local\Temp\JSW_NEW_.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:1372

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

3
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

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

    1KB

    MD5

    17573558c4e714f606f997e5157afaac

    SHA1

    13e16e9415ceef429aaf124139671ebeca09ed23

    SHA256

    c18db6aecad2436da4a63ff26af4e3a337cca48f01c21b8db494fe5ccc60e553

    SHA512

    f4edf13f05a0d142e4dd42802098c8c44988ee8869621a62c2b565a77c9a95857f636583ff8d6d9baa366603d98b9bfbf1fc75bc6f9f8f83c80cb1215b2941cc

  • C:\Users\Admin\AppData\Local\Temp\tmpC0A0.tmp
    Filesize

    1KB

    MD5

    f8288e364607b5e0a4c7144381bfa002

    SHA1

    f42b8424fd7a766d1e159f0cc3971b225c174371

    SHA256

    2c61db3e5b66f99b59708db1f605f5367bbd7c3663f442c6147a9bffda3e09cc

    SHA512

    5357f4bcf4f9a5ec9f85c4da6ac418b62b5cbb65cb9b17b89e2896ddebd4972a6080a8f31a0685fc0e8fbc8c21ee008d0c5f068e38a0ac6a5e1f66595a4b866d

  • memory/536-136-0x0000000000000000-mapping.dmp
  • memory/1372-139-0x0000000000400000-0x0000000000466000-memory.dmp
    Filesize

    408KB

  • memory/1372-138-0x0000000000000000-mapping.dmp
  • memory/1372-141-0x0000000005ED0000-0x0000000005F36000-memory.dmp
    Filesize

    408KB

  • memory/1372-142-0x0000000006410000-0x0000000006460000-memory.dmp
    Filesize

    320KB

  • memory/3992-134-0x0000000005290000-0x000000000529A000-memory.dmp
    Filesize

    40KB

  • memory/3992-135-0x00000000053C0000-0x0000000005416000-memory.dmp
    Filesize

    344KB

  • memory/3992-133-0x0000000005320000-0x00000000053B2000-memory.dmp
    Filesize

    584KB

  • memory/3992-132-0x0000000005830000-0x0000000005DD4000-memory.dmp
    Filesize

    5.6MB

  • memory/3992-130-0x00000000007A0000-0x000000000084E000-memory.dmp
    Filesize

    696KB

  • memory/3992-131-0x00000000051E0000-0x000000000527C000-memory.dmp
    Filesize

    624KB