Analysis

  • max time kernel
    53s
  • max time network
    137s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-11-2022 19:35

General

  • Target

    file.exe

  • Size

    2.5MB

  • MD5

    a530d5d39b6ce0d2482976be86658ee7

  • SHA1

    bc479b3e87ceeb82299d0aa96adaf897d886e201

  • SHA256

    bbf64d0a989e32b724b7eb4c43fbb037ebd2ed8b04aef5a3516b61e87de379fb

  • SHA512

    45d23a559402eadeaf0013fc10890ffc65a06752252a5d59995405928b4faa9a23099a8771332fccb8ac211e6be01507acd035a7a2451dd4b92b6c63e65762e5

  • SSDEEP

    49152:Z2aFCDWL7WvD1jRySgK1LLhnfUvDCqdstyKpQD0lZl1BtPR4FBnDyA5hq:McCD7vD1dgWZ4ReyKH1rROBtDq

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 12 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:4248
    • C:\Users\Admin\AppData\Local\Temp\is-02DKM.tmp\is-NJSHU.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-02DKM.tmp\is-NJSHU.tmp" /SL4 $D01C0 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2393289 52736
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:4740
      • C:\Program Files (x86)\flSearcher\flsearcher67.exe
        "C:\Program Files (x86)\flSearcher\flsearcher67.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:4380
        • C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\o6xHFyI2Z0EZ.exe
          4⤵
          • Executes dropped EXE
          PID:1388
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "flsearcher67.exe" /f & erase "C:\Program Files (x86)\flSearcher\flsearcher67.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4264
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "flsearcher67.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:424

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\flSearcher\flsearcher67.exe

    Filesize

    3.6MB

    MD5

    f7ddc89c06ad8ce8fcb45853427b1f33

    SHA1

    e35ad6f1cbd75ae36099ef24901961e25fc868e3

    SHA256

    1a9790b4dd71b912bfa220049bbca0399f483374ba9d1ef1e92d410a49f9d2a8

    SHA512

    a2a1f750e2a959883f251280b3c862f4664cec726088b73912d20ad2f62206357af622c83a2a1088d3a50d112040919ac52e4a6e7021ee89ecb7d175d9a965ef

  • C:\Program Files (x86)\flSearcher\flsearcher67.exe

    Filesize

    3.6MB

    MD5

    f7ddc89c06ad8ce8fcb45853427b1f33

    SHA1

    e35ad6f1cbd75ae36099ef24901961e25fc868e3

    SHA256

    1a9790b4dd71b912bfa220049bbca0399f483374ba9d1ef1e92d410a49f9d2a8

    SHA512

    a2a1f750e2a959883f251280b3c862f4664cec726088b73912d20ad2f62206357af622c83a2a1088d3a50d112040919ac52e4a6e7021ee89ecb7d175d9a965ef

  • C:\Users\Admin\AppData\Local\Temp\is-02DKM.tmp\is-NJSHU.tmp

    Filesize

    657KB

    MD5

    7cd12c54a9751ca6eee6ab0c85fb68f5

    SHA1

    76562e9b7888b6d20d67addb5a90b68b54a51987

    SHA256

    e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

    SHA512

    27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

  • C:\Users\Admin\AppData\Local\Temp\is-02DKM.tmp\is-NJSHU.tmp

    Filesize

    657KB

    MD5

    7cd12c54a9751ca6eee6ab0c85fb68f5

    SHA1

    76562e9b7888b6d20d67addb5a90b68b54a51987

    SHA256

    e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

    SHA512

    27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

  • C:\Users\Admin\AppData\Local\Temp\is-M0MA9.tmp\_isetup\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\o6xHFyI2Z0EZ.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\o6xHFyI2Z0EZ.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/4248-132-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4248-156-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4248-151-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4380-147-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/4380-143-0x0000000000400000-0x00000000015A2000-memory.dmp

    Filesize

    17.6MB

  • memory/4380-152-0x0000000000400000-0x00000000015A2000-memory.dmp

    Filesize

    17.6MB

  • memory/4380-142-0x0000000000400000-0x00000000015A2000-memory.dmp

    Filesize

    17.6MB

  • memory/4380-141-0x0000000000400000-0x00000000015A2000-memory.dmp

    Filesize

    17.6MB

  • memory/4380-155-0x0000000000400000-0x00000000015A2000-memory.dmp

    Filesize

    17.6MB