Analysis

  • max time kernel
    33s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    15-06-2023 21:11

General

  • Target

    OSTOTILAUSPYYNTÖ _0932.exe

  • Size

    6KB

  • MD5

    8402ed726c49025989f98d23ce9d7e3e

  • SHA1

    e5784d2999ab073773b65e7d3a10ab2bb3460ff0

  • SHA256

    5780663f3e32e0308caa2cc657ccdcaadf393f22d2c1c3c1f5afa9f55aa136bb

  • SHA512

    208fdd79dd0ff0a61a0dccc80ea718b6f6ef18151104d3d74753035e7ed2844facc07df1605af42dfbb6631971eff6e5ec4cecbbe42f93bef0e3c75d5c942ebc

  • SSDEEP

    96:gzTFJVQ7mAK9KgeRZskYuIH7dYYyWwRkvPzNt:gHa7m79ETSuIH7dYYyYR

Malware Config

Extracted

Family

purecrypter

C2

https://files.catbox.moe/6dlgj3.mp4

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot2100759405:AAFzA0s7LpNOhvzQJo2bUlDpzSqnB8ir69o/

Signatures

  • AgentTesla

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

  • PureCrypter

    PureCrypter is a .NET malware loader first seen in early 2021.

  • 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
  • Looks up external IP address via web service 2 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\OSTOTILAUSPYYNTÖ _0932.exe
    "C:\Users\Admin\AppData\Local\Temp\OSTOTILAUSPYYNTÖ _0932.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2040
    • C:\Users\Admin\AppData\Local\Temp\OSTOTILAUSPYYNTÖ _0932.exe
      "C:\Users\Admin\AppData\Local\Temp\OSTOTILAUSPYYNTÖ _0932.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:1692

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

    Filesize

    62KB

    MD5

    3ac860860707baaf32469fa7cc7c0192

    SHA1

    c33c2acdaba0e6fa41fd2f00f186804722477639

    SHA256

    d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904

    SHA512

    d62ad2408c969a95550fb87efda50f988770ba5e39972041bf85924275baf156b8bec309ecc6409e5acdd37ec175dea40eff921ab58933b5b5b5d35a6147567c

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

    Filesize

    62KB

    MD5

    3ac860860707baaf32469fa7cc7c0192

    SHA1

    c33c2acdaba0e6fa41fd2f00f186804722477639

    SHA256

    d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904

    SHA512

    d62ad2408c969a95550fb87efda50f988770ba5e39972041bf85924275baf156b8bec309ecc6409e5acdd37ec175dea40eff921ab58933b5b5b5d35a6147567c

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    f5176e57e1f48b8ba5142424bda1a140

    SHA1

    fefbba3c2700c30be4f8fc2644c40350939a23af

    SHA256

    509fc2154cda06ddbb0fd70d9e8d11180a7f618329c3b3d6b744412cbb923202

    SHA512

    153c061d07552b43868ecd3fdfda67d15e2ddebd7ae6b9c7d62b55703b12ca14edbc3be4c33fcf473346817a76f7f445679331844a151db3c52af95b172528ef

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    74878605c84a00f02e15b739db671a23

    SHA1

    2b1853f7b3c79d5bf9f5da9b4099d5767cb38068

    SHA256

    e32bde3d736822bfa74e54ff1b6d43a01479864e198b6ae784655fd3c19c01b6

    SHA512

    21dfdefa70ca77cc685f7b7d74138607523b8caab7167f50b2b3bac6a5e1f171143b32bdfe7893b7821f603b10ec58c55cb96f160b165d073b9873061316f71c

  • C:\Users\Admin\AppData\Local\Temp\Cab21E5.tmp

    Filesize

    61KB

    MD5

    fc4666cbca561e864e7fdf883a9e6661

    SHA1

    2f8d6094c7a34bf12ea0bbf0d51ee9c5bb7939a5

    SHA256

    10f3deb6c452d749a7451b5d065f4c0449737e5ee8a44f4d15844b503141e65b

    SHA512

    c71f54b571e01f247f072be4bbebdf5d8410b67eb79a61e7e0d9853fe857ab9bd12f53e6af3394b935560178107291fc4be351b27deb388eba90ba949633d57d

  • C:\Users\Admin\AppData\Local\Temp\Tar2344.tmp

    Filesize

    164KB

    MD5

    4ff65ad929cd9a367680e0e5b1c08166

    SHA1

    c0af0d4396bd1f15c45f39d3b849ba444233b3a2

    SHA256

    c8733c93cc5aaf5ca206d06af22ee8dbdec764fb5085019a6a9181feb9dfdee6

    SHA512

    f530dc0d024a5a3b8903ffaaa41b608a5ccdd6da4ba1949f2c2e55a9fca475fec5c8d2119b5763cabe7ef1c3788fb9dcac621869db51d65b1d83cfe404fb4c27

  • memory/1692-1070-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1692-1090-0x0000000002250000-0x0000000002290000-memory.dmp

    Filesize

    256KB

  • memory/1692-1071-0x0000000002250000-0x0000000002290000-memory.dmp

    Filesize

    256KB

  • memory/2040-169-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-173-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-141-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-143-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-145-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-147-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-149-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-151-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-153-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-155-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-157-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-159-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-161-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-163-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-165-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-54-0x0000000000940000-0x0000000000948000-memory.dmp

    Filesize

    32KB

  • memory/2040-167-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-175-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-177-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-139-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-171-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-183-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-181-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-179-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-187-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-189-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-185-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-191-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-195-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-193-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-197-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-1056-0x0000000001E00000-0x0000000001E01000-memory.dmp

    Filesize

    4KB

  • memory/2040-1057-0x0000000004070000-0x00000000040B2000-memory.dmp

    Filesize

    264KB

  • memory/2040-1058-0x0000000005340000-0x000000000538C000-memory.dmp

    Filesize

    304KB

  • memory/2040-137-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-134-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-135-0x00000000059A0000-0x0000000005A4F000-memory.dmp

    Filesize

    700KB

  • memory/2040-133-0x00000000059A0000-0x0000000005A56000-memory.dmp

    Filesize

    728KB

  • memory/2040-55-0x0000000004640000-0x0000000004680000-memory.dmp

    Filesize

    256KB