Analysis

  • max time kernel
    147s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-10-2023 17:55

General

  • Target

    NEAS.4a41e0418949914320454262970d1c878a37b2c01b48a7e92047f536771bf6f9js_JC.js

  • Size

    7KB

  • MD5

    e811c4c9c880e3fae8bfb0cd7be6a4f6

  • SHA1

    b329fe66df345f51d229f5b76069a1f1263a1c2b

  • SHA256

    4a41e0418949914320454262970d1c878a37b2c01b48a7e92047f536771bf6f9

  • SHA512

    64ddaa45cddf959f07dac85ac412e169964f70150c02b32c1ff941791b2ce609a3d824d371b37e05bf7e7ec21b2658b7d462a9d9bfaa5a694c673aeefd335108

  • SSDEEP

    48:6IDkWkpUJeT2nfw9LOABJCvs2LNL75q+tCqB5q04CXSR:8wm0JciBc0lo

Malware Config

Extracted

Credentials

  • Protocol:
    ftp
  • Host:
    ftp.martur.cl
  • Port:
    21
  • Username:
    admin@martur.cl
  • Password:
    (57reRWWw5dj

Extracted

Family

agenttesla

Credentials

  • Protocol:
    ftp
  • Host:
    ftp://ftp.martur.cl
  • Port:
    21
  • Username:
    admin@martur.cl
  • Password:
    (57reRWWw5dj

Extracted

Family

wshrat

C2

http://chongmei33.publicvm.com:7045

Signatures

  • AgentTesla

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

  • WSHRAT

    WSHRAT is a variant of Houdini worm and has vbs and js variants.

  • WSHRAT payload 2 IoCs
  • Blocklisted process makes network request 30 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 2 IoCs
  • 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.

  • 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 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 2 IoCs
  • Script User-Agent 26 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\NEAS.4a41e0418949914320454262970d1c878a37b2c01b48a7e92047f536771bf6f9js_JC.js
    1⤵
    • Blocklisted process makes network request
    • Checks computer location settings
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:4268
    • C:\Windows\System32\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\NAKFZC.js"
      2⤵
      • Blocklisted process makes network request
      • Checks computer location settings
      • Drops startup file
      • Adds Run key to start application
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:4904
      • C:\Windows\System32\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Output.js"
        3⤵
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:3340
        • C:\Users\Admin\AppData\Local\Temp\vOb.exe
          "C:\Users\Admin\AppData\Local\Temp\vOb.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:1584
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
            "Powershell.exe" -ExecutionPolicy Bypass -command 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 'C:\Users\Admin\AppData\Local\Temp\vOb.exe' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\windows Audio.exe'
            5⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2000
          • C:\Users\Admin\AppData\Local\Temp\vOb.exe
            "C:\Users\Admin\AppData\Local\Temp\vOb.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:4616

Network

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

3
T1552

Credentials In Files

3
T1552.001

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\NAKFZC.js
    Filesize

    764KB

    MD5

    8d38022aafef200f061a873cad79fe61

    SHA1

    536fb4fe64ce9695322eaca56ad895457acdfde8

    SHA256

    15921f2949858a67b8f01ac048ceed3083774b664549ea455d12eb8748049961

    SHA512

    e65acf7151e032df49a4f2bcd29dbcac0a3b1c2eb63f240bf556d603869ca5a73a61ba23aba924efb8fb764f212cceb9705c3ff8cdb635651ba9e10d2bb94060

  • C:\Users\Admin\AppData\Local\Temp\Output.js
    Filesize

    484KB

    MD5

    183b67bb3bced4ef59e57cfbfff3d08e

    SHA1

    f79fe87e3c5f331895db528dd7beef8b5477187a

    SHA256

    33170390bddb29dc3b25b4301982f88451c1cdff4415f98050a470c7f6d31f32

    SHA512

    21f2c5d01f493dc1d5f7c84c387b5cea5270f635ab154946a208977e8c9cc95b837d82230b74b307d0e20cabfabbf8a578b9b9be9260790d886426e358e0dabc

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_om4twynt.el2.ps1
    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

    346KB

    MD5

    84c9943b3b720f2090e42202d733ff5b

    SHA1

    da75a570bdceaa6eeb9beb3cf1a2a2a334265349

    SHA256

    1fd86142972ca45a894e5bae8f464164d521694d7a65e3e28d59be74ba6d5166

    SHA512

    aefc0c23ffc5b7d832e76eac265c403088b4ebbb120ceb718b753fda1b4292c9d3a05bfba303756fa25bed2e9090ac9f1925c232aa7cd443ebeb412f3dc88624

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

    346KB

    MD5

    84c9943b3b720f2090e42202d733ff5b

    SHA1

    da75a570bdceaa6eeb9beb3cf1a2a2a334265349

    SHA256

    1fd86142972ca45a894e5bae8f464164d521694d7a65e3e28d59be74ba6d5166

    SHA512

    aefc0c23ffc5b7d832e76eac265c403088b4ebbb120ceb718b753fda1b4292c9d3a05bfba303756fa25bed2e9090ac9f1925c232aa7cd443ebeb412f3dc88624

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

    346KB

    MD5

    84c9943b3b720f2090e42202d733ff5b

    SHA1

    da75a570bdceaa6eeb9beb3cf1a2a2a334265349

    SHA256

    1fd86142972ca45a894e5bae8f464164d521694d7a65e3e28d59be74ba6d5166

    SHA512

    aefc0c23ffc5b7d832e76eac265c403088b4ebbb120ceb718b753fda1b4292c9d3a05bfba303756fa25bed2e9090ac9f1925c232aa7cd443ebeb412f3dc88624

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

    346KB

    MD5

    84c9943b3b720f2090e42202d733ff5b

    SHA1

    da75a570bdceaa6eeb9beb3cf1a2a2a334265349

    SHA256

    1fd86142972ca45a894e5bae8f464164d521694d7a65e3e28d59be74ba6d5166

    SHA512

    aefc0c23ffc5b7d832e76eac265c403088b4ebbb120ceb718b753fda1b4292c9d3a05bfba303756fa25bed2e9090ac9f1925c232aa7cd443ebeb412f3dc88624

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\NAKFZC.js
    Filesize

    764KB

    MD5

    8d38022aafef200f061a873cad79fe61

    SHA1

    536fb4fe64ce9695322eaca56ad895457acdfde8

    SHA256

    15921f2949858a67b8f01ac048ceed3083774b664549ea455d12eb8748049961

    SHA512

    e65acf7151e032df49a4f2bcd29dbcac0a3b1c2eb63f240bf556d603869ca5a73a61ba23aba924efb8fb764f212cceb9705c3ff8cdb635651ba9e10d2bb94060

  • memory/1584-31-0x0000000004ED0000-0x0000000004F24000-memory.dmp
    Filesize

    336KB

  • memory/1584-32-0x00000000054D0000-0x0000000005A74000-memory.dmp
    Filesize

    5.6MB

  • memory/1584-33-0x0000000005000000-0x0000000005092000-memory.dmp
    Filesize

    584KB

  • memory/1584-34-0x0000000004E50000-0x0000000004E60000-memory.dmp
    Filesize

    64KB

  • memory/1584-36-0x00000000744C0000-0x0000000074C70000-memory.dmp
    Filesize

    7.7MB

  • memory/1584-37-0x0000000004E50000-0x0000000004E60000-memory.dmp
    Filesize

    64KB

  • memory/1584-38-0x00000000050A0000-0x000000000513C000-memory.dmp
    Filesize

    624KB

  • memory/1584-29-0x00000000004C0000-0x000000000051C000-memory.dmp
    Filesize

    368KB

  • memory/1584-63-0x00000000744C0000-0x0000000074C70000-memory.dmp
    Filesize

    7.7MB

  • memory/1584-30-0x00000000744C0000-0x0000000074C70000-memory.dmp
    Filesize

    7.7MB

  • memory/1584-58-0x0000000004F70000-0x0000000004F7A000-memory.dmp
    Filesize

    40KB

  • memory/2000-90-0x00000000073A0000-0x00000000073BE000-memory.dmp
    Filesize

    120KB

  • memory/2000-95-0x00000000075D0000-0x00000000075DA000-memory.dmp
    Filesize

    40KB

  • memory/2000-46-0x00000000059B0000-0x0000000005A16000-memory.dmp
    Filesize

    408KB

  • memory/2000-43-0x0000000005310000-0x0000000005938000-memory.dmp
    Filesize

    6.2MB

  • memory/2000-47-0x0000000005B50000-0x0000000005BB6000-memory.dmp
    Filesize

    408KB

  • memory/2000-57-0x0000000005BC0000-0x0000000005F14000-memory.dmp
    Filesize

    3.3MB

  • memory/2000-41-0x0000000004CD0000-0x0000000004CE0000-memory.dmp
    Filesize

    64KB

  • memory/2000-42-0x0000000004CD0000-0x0000000004CE0000-memory.dmp
    Filesize

    64KB

  • memory/2000-40-0x00000000744C0000-0x0000000074C70000-memory.dmp
    Filesize

    7.7MB

  • memory/2000-104-0x00000000744C0000-0x0000000074C70000-memory.dmp
    Filesize

    7.7MB

  • memory/2000-102-0x0000000007880000-0x0000000007888000-memory.dmp
    Filesize

    32KB

  • memory/2000-64-0x0000000006130000-0x000000000614E000-memory.dmp
    Filesize

    120KB

  • memory/2000-66-0x0000000006210000-0x000000000625C000-memory.dmp
    Filesize

    304KB

  • memory/2000-101-0x00000000078A0000-0x00000000078BA000-memory.dmp
    Filesize

    104KB

  • memory/2000-69-0x00000000744C0000-0x0000000074C70000-memory.dmp
    Filesize

    7.7MB

  • memory/2000-70-0x0000000004CD0000-0x0000000004CE0000-memory.dmp
    Filesize

    64KB

  • memory/2000-71-0x0000000004CD0000-0x0000000004CE0000-memory.dmp
    Filesize

    64KB

  • memory/2000-100-0x00000000077A0000-0x00000000077B4000-memory.dmp
    Filesize

    80KB

  • memory/2000-99-0x0000000007790000-0x000000000779E000-memory.dmp
    Filesize

    56KB

  • memory/2000-77-0x000000007EEC0000-0x000000007EED0000-memory.dmp
    Filesize

    64KB

  • memory/2000-78-0x00000000073E0000-0x0000000007412000-memory.dmp
    Filesize

    200KB

  • memory/2000-79-0x0000000070240000-0x000000007028C000-memory.dmp
    Filesize

    304KB

  • memory/2000-80-0x0000000004CD0000-0x0000000004CE0000-memory.dmp
    Filesize

    64KB

  • memory/2000-39-0x0000000002870000-0x00000000028A6000-memory.dmp
    Filesize

    216KB

  • memory/2000-91-0x0000000007450000-0x00000000074F3000-memory.dmp
    Filesize

    652KB

  • memory/2000-97-0x0000000007760000-0x0000000007771000-memory.dmp
    Filesize

    68KB

  • memory/2000-93-0x0000000007C00000-0x000000000827A000-memory.dmp
    Filesize

    6.5MB

  • memory/2000-94-0x0000000007420000-0x000000000743A000-memory.dmp
    Filesize

    104KB

  • memory/2000-45-0x00000000052C0000-0x00000000052E2000-memory.dmp
    Filesize

    136KB

  • memory/2000-96-0x00000000077E0000-0x0000000007876000-memory.dmp
    Filesize

    600KB

  • memory/4616-92-0x0000000005840000-0x0000000005890000-memory.dmp
    Filesize

    320KB

  • memory/4616-74-0x0000000004AE0000-0x0000000004AF0000-memory.dmp
    Filesize

    64KB

  • memory/4616-73-0x00000000744C0000-0x0000000074C70000-memory.dmp
    Filesize

    7.7MB

  • memory/4616-67-0x0000000004AE0000-0x0000000004AF0000-memory.dmp
    Filesize

    64KB

  • memory/4616-65-0x00000000744C0000-0x0000000074C70000-memory.dmp
    Filesize

    7.7MB

  • memory/4616-62-0x0000000000510000-0x0000000000552000-memory.dmp
    Filesize

    264KB

  • memory/4616-106-0x0000000006150000-0x000000000615A000-memory.dmp
    Filesize

    40KB