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Analysis

  • max time kernel
    61s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17/12/2022, 13:31

General

  • Target

    file.exe

  • Size

    2.3MB

  • MD5

    ec616833bf4cb2a01f40730cef04efcd

  • SHA1

    ebca2be25153ef2696fe0037d47219c9c593eddb

  • SHA256

    4911330ebb6477a1c55e87658de922bbc12cadcf8769db69f665f63d6417bbb5

  • SHA512

    72fc2bf15088e731a09c6cd4c71cafc688a644aa598ed8cf27609487d5d46b9076ab5d8590da1d3d473bba4ca783ef37e9546e99e964b1746282f817fd3fac04

  • SSDEEP

    49152:5fCBx0egW+k4/odRfroT9D7syVb8LsSLOVbBDivLlAz:56l+kC4Rfrs9CASkhz

Score
10/10

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

  • NyMaim

    NyMaim is a malware with various capabilities written in C++ and first seen in 2013.

  • Executes dropped EXE 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Loads dropped DLL 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Program Files directory 9 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1612
    • C:\Users\Admin\AppData\Local\Temp\is-UA29S.tmp\is-OA8F0.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-UA29S.tmp\is-OA8F0.tmp" /SL4 $D01EE "C:\Users\Admin\AppData\Local\Temp\file.exe" 2152622 169472
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1584
      • C:\Program Files (x86)\PrintFolders\obFolders.exe
        "C:\Program Files (x86)\PrintFolders\obFolders.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:664
        • C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\sXhHEVNwuvZ.exe
          4⤵
          • Executes dropped EXE
          PID:4240
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "obFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\obFolders.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4496
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "obFolders.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1400

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\PrintFolders\obFolders.exe

    Filesize

    3.5MB

    MD5

    519304298fd32ccbff7c78fe7c7c61a9

    SHA1

    10297f328165563fff5f8e4eb4685232e71778cb

    SHA256

    3592f01903837377542c07373ed7b4c517bbec3817bfbb007b63202cce7c1236

    SHA512

    3935080afd29ccee2aa6728aa06b2e19d9062c297329566e35402b4f7210b353ded56090bbf50cfec444d8750257f6e7f3b6c97929739a06229715a6cc295f20

  • C:\Program Files (x86)\PrintFolders\obFolders.exe

    Filesize

    3.5MB

    MD5

    519304298fd32ccbff7c78fe7c7c61a9

    SHA1

    10297f328165563fff5f8e4eb4685232e71778cb

    SHA256

    3592f01903837377542c07373ed7b4c517bbec3817bfbb007b63202cce7c1236

    SHA512

    3935080afd29ccee2aa6728aa06b2e19d9062c297329566e35402b4f7210b353ded56090bbf50cfec444d8750257f6e7f3b6c97929739a06229715a6cc295f20

  • C:\Users\Admin\AppData\Local\Temp\is-56B3L.tmp\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Local\Temp\is-UA29S.tmp\is-OA8F0.tmp

    Filesize

    759KB

    MD5

    0dc8826072fc99382be7db6ae5929aff

    SHA1

    7ca23e146bf9bde712b27e400de3243e6bd0a357

    SHA256

    11ec35b1fea3160e892f0875034a2f18cf0d8d8874ac611b5a7e0f0ace2667ec

    SHA512

    08db35c065b9b8f740242587f35a3c0ba772993d8132589fe26bafa9bab31d6c5aecae62490a22e135d64ce6b54c26e553534e5d9d6e01d6be8472f471bdf442

  • C:\Users\Admin\AppData\Local\Temp\is-UA29S.tmp\is-OA8F0.tmp

    Filesize

    759KB

    MD5

    0dc8826072fc99382be7db6ae5929aff

    SHA1

    7ca23e146bf9bde712b27e400de3243e6bd0a357

    SHA256

    11ec35b1fea3160e892f0875034a2f18cf0d8d8874ac611b5a7e0f0ace2667ec

    SHA512

    08db35c065b9b8f740242587f35a3c0ba772993d8132589fe26bafa9bab31d6c5aecae62490a22e135d64ce6b54c26e553534e5d9d6e01d6be8472f471bdf442

  • C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\sXhHEVNwuvZ.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\sXhHEVNwuvZ.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/664-143-0x0000000000400000-0x000000000158A000-memory.dmp

    Filesize

    17.5MB

  • memory/664-148-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/664-142-0x0000000000400000-0x000000000158A000-memory.dmp

    Filesize

    17.5MB

  • memory/664-155-0x0000000000400000-0x000000000158A000-memory.dmp

    Filesize

    17.5MB

  • memory/664-144-0x0000000000400000-0x000000000158A000-memory.dmp

    Filesize

    17.5MB

  • memory/664-152-0x0000000000400000-0x000000000158A000-memory.dmp

    Filesize

    17.5MB

  • memory/1612-137-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1612-132-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1612-156-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB