Resubmissions

26-10-2021 19:46

211026-yhefzaaahj 10

Analysis

  • max time kernel
    144s
  • max time network
    161s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    26-10-2021 19:46

General

  • Target

    b76097aaa0ca490e5eb6b5a2dd13c5bc.dll

  • Size

    549KB

  • MD5

    b76097aaa0ca490e5eb6b5a2dd13c5bc

  • SHA1

    9920ece38424d7902ffb7c28ae1b5c0d33e19aa8

  • SHA256

    8f409a0d417462b342281b3f869a397ed4f5b8fd5841d140c8c57e7df39ff4b0

  • SHA512

    16457a472ae064ccb3f8dc2e2d3231380c58c607f947a0570ac2a0cb54babbb27f542a778f367bcf81f15715da6378525b0e6e4fc10e2b571051a1bf8e3edb37

Malware Config

Extracted

Family

gozi_ifsb

Botnet

8899

C2

http://microsoft.com.login/

https://premiumweare.com

https://gloverunomai.com

Attributes
  • build

    260212

  • dga_season

    10

  • exe_type

    loader

  • server_id

    12

rsa_pubkey.plain
serpent.plain

Signatures

  • Gozi, Gozi IFSB

    Gozi ISFB is a well-known and widely distributed banking trojan.

  • suricata: ET MALWARE Ursnif Variant CnC Beacon - URI Struct M1 (_2B)

    suricata: ET MALWARE Ursnif Variant CnC Beacon - URI Struct M1 (_2B)

  • suricata: ET MALWARE Ursnif Variant CnC Beacon - URI Struct M2 (_2F)

    suricata: ET MALWARE Ursnif Variant CnC Beacon - URI Struct M2 (_2F)

  • Blocklisted process makes network request 14 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\b76097aaa0ca490e5eb6b5a2dd13c5bc.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4092
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\b76097aaa0ca490e5eb6b5a2dd13c5bc.dll,#1
      2⤵
      • Blocklisted process makes network request
      PID:4076

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

  • memory/4076-115-0x0000000000000000-mapping.dmp
  • memory/4076-116-0x0000000074010000-0x00000000740AB000-memory.dmp
    Filesize

    620KB

  • memory/4076-117-0x0000000074010000-0x000000007401F000-memory.dmp
    Filesize

    60KB

  • memory/4076-118-0x0000000074010000-0x00000000740AB000-memory.dmp
    Filesize

    620KB

  • memory/4076-119-0x0000000002D60000-0x0000000002D61000-memory.dmp
    Filesize

    4KB