Analysis

  • max time kernel
    94s
  • max time network
    129s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250217-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/02/2025, 13:00

General

  • Target

    rfacturaci__nsolicitado.com.exe

  • Size

    599KB

  • MD5

    214b5935a739f12a5760179cd3251c43

  • SHA1

    7c2733eca7b957277592a2d92b95cdd81563500e

  • SHA256

    1a7d82d7886a4a5005d4577a279ccd72ab94e33ca6c499a0ce9ccc605fd4cf41

  • SHA512

    d4d260e2ca6ebf4997ec8d23bde1d9b0200aac6d6f7f8bbaaa4142037e97e634fb673db6c36e2a63a3aea1e4c10e4ecd9910f90f96b39a0710dc4547807be1b0

  • SSDEEP

    12288:ZYAELrvcb3sdCYR5MeJUb5QuHnOlOfk1bbgxL+4+DykgvgsWR:ZYAEXW3sQy5UnOak1bsxAFgvgs

Malware Config

Signatures

  • Guloader family
  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • Loads dropped DLL 6 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\rfacturaci__nsolicitado.com.exe
    "C:\Users\Admin\AppData\Local\Temp\rfacturaci__nsolicitado.com.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:1936
    • C:\Users\Admin\AppData\Local\Temp\rfacturaci__nsolicitado.com.exe
      "C:\Users\Admin\AppData\Local\Temp\rfacturaci__nsolicitado.com.exe"
      2⤵
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:880

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\nspB865.tmp\LangDLL.dll

    Filesize

    5KB

    MD5

    68b287f4067ba013e34a1339afdb1ea8

    SHA1

    45ad585b3cc8e5a6af7b68f5d8269c97992130b3

    SHA256

    18e8b40ba22c7a1687bd16e8d585380bc2773fff5002d7d67e9485fcc0c51026

    SHA512

    06c38bbb07fb55256f3cdc24e77b3c8f3214f25bfd140b521a39d167113bf307a7e8d24e445d510bc5e4e41d33c9173bb14e3f2a38bc29a0e3d08c1f0dca4bdb

  • C:\Users\Admin\AppData\Local\Temp\nspB865.tmp\System.dll

    Filesize

    12KB

    MD5

    cff85c549d536f651d4fb8387f1976f2

    SHA1

    d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

    SHA256

    8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

    SHA512

    531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

  • C:\Users\Admin\acquaintancy.ini

    Filesize

    36B

    MD5

    55d234e670b91b9c21dc00a1336ec7c2

    SHA1

    8f4f76a5c30b680ac339b33b23a45957e673b2fb

    SHA256

    3433166ef38dd2c36c552f03b3d73c5549a1d573f23aeb8db2ac81f7746824f3

    SHA512

    95357c5f995c9b198388db033b4e88a32a9d1adac025057db89f8b56f7e271e20ef2f68fa30af4ac93cc94d61f3eba6c0012ef3e45c0a314067a7666acac0fec

  • memory/880-356-0x0000000001660000-0x0000000002A51000-memory.dmp

    Filesize

    19.9MB

  • memory/880-358-0x0000000001660000-0x0000000002A51000-memory.dmp

    Filesize

    19.9MB

  • memory/880-364-0x0000000000400000-0x0000000001654000-memory.dmp

    Filesize

    18.3MB

  • memory/880-361-0x0000000000400000-0x0000000001654000-memory.dmp

    Filesize

    18.3MB

  • memory/880-360-0x0000000076FC1000-0x00000000770E1000-memory.dmp

    Filesize

    1.1MB

  • memory/880-340-0x0000000000400000-0x0000000001654000-memory.dmp

    Filesize

    18.3MB

  • memory/880-341-0x0000000001660000-0x0000000002A51000-memory.dmp

    Filesize

    19.9MB

  • memory/880-342-0x0000000077048000-0x0000000077049000-memory.dmp

    Filesize

    4KB

  • memory/880-343-0x0000000077065000-0x0000000077066000-memory.dmp

    Filesize

    4KB

  • memory/880-359-0x0000000000400000-0x0000000001654000-memory.dmp

    Filesize

    18.3MB

  • memory/880-357-0x0000000000400000-0x0000000001654000-memory.dmp

    Filesize

    18.3MB

  • memory/1936-335-0x0000000076FC1000-0x00000000770E1000-memory.dmp

    Filesize

    1.1MB

  • memory/1936-334-0x0000000004A30000-0x0000000005E21000-memory.dmp

    Filesize

    19.9MB

  • memory/1936-339-0x0000000004A30000-0x0000000005E21000-memory.dmp

    Filesize

    19.9MB

  • memory/1936-337-0x0000000004A30000-0x0000000005E21000-memory.dmp

    Filesize

    19.9MB

  • memory/1936-336-0x0000000073C15000-0x0000000073C16000-memory.dmp

    Filesize

    4KB