Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    13-09-2023 12:57

General

  • Target

    ca77a885c5e62f0cda624be72bb3db4.exe

  • Size

    287KB

  • MD5

    f286b5883b7339bd2c4183540d7226a9

  • SHA1

    64d050aa949257a9623abaa88efc13817d1c10e5

  • SHA256

    854f1a294c0c0d5ece4903353fd4776eed29922e240fa97a8fbd8406e2a60798

  • SHA512

    cce1b5787ccab48877ff2e184ba088b33ac7e5293359cd10fe4bf193c8afbb0af2edb2944c8132cb4774eb7ae0abb0e998911357216ddedf5b8b3e4aa76d9e32

  • SSDEEP

    6144:DHClm6SWPoK5Z0EwVSmRPQk+e+5wX9bVLeLGOzN:DHCnZxb8Nm6iL7N

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot6176004110:AAFKA5be4dMwA848HWxzYIzrzzOGIHMOJGc/sendMessage?chat_id=615133582

Signatures

  • Gurcu, WhiteSnake

    Gurcu is a malware stealer written in C#.

  • 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
  • Checks installed software on the system 1 TTPs

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

  • Looks up external IP address via web service 1 IoCs

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

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ca77a885c5e62f0cda624be72bb3db4.exe
    "C:\Users\Admin\AppData\Local\Temp\ca77a885c5e62f0cda624be72bb3db4.exe"
    1⤵
    • Accesses Microsoft Outlook profiles
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • outlook_office_path
    • outlook_win_path
    PID:2576

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    344B

    MD5

    467381c8ea0ddc74d947801c5119a0d9

    SHA1

    afd86dc622e5d526673d34cffa79ac94373b2ccd

    SHA256

    28466b208bcbbb30804bb96a01d0e15c96a729f8ac5fd01b49790814ce550ff5

    SHA512

    c161d9b9060603b08bf8a2b65045b03a1c546e51a0bf105f6cf5bab8fb96963fe4cc0c7dfb018443b4a51f9fbf324745857f16be2f957939af7c159344334034

  • C:\Users\Admin\AppData\Local\Temp\Cab4F1C.tmp

    Filesize

    61KB

    MD5

    f3441b8572aae8801c04f3060b550443

    SHA1

    4ef0a35436125d6821831ef36c28ffaf196cda15

    SHA256

    6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

    SHA512

    5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

  • C:\Users\Admin\AppData\Local\Temp\Tar4FBB.tmp

    Filesize

    163KB

    MD5

    9441737383d21192400eca82fda910ec

    SHA1

    725e0d606a4fc9ba44aa8ffde65bed15e65367e4

    SHA256

    bc3a6e84e41faeb57e7c21aa3b60c2a64777107009727c5b7c0ed8fe658909e5

    SHA512

    7608dd653a66cd364392a78d4711b48d1707768d36996e4d38871c6843b5714e1d7da4b4cc6db969e6000cfa182bcb74216ef6823d1063f036fc5c3413fb8dcf

  • memory/2576-0-0x0000000000160000-0x00000000001AE000-memory.dmp

    Filesize

    312KB

  • memory/2576-1-0x000007FEF5C10000-0x000007FEF65FC000-memory.dmp

    Filesize

    9.9MB

  • memory/2576-2-0x000000001A680000-0x000000001A700000-memory.dmp

    Filesize

    512KB

  • memory/2576-64-0x000007FEF5C10000-0x000007FEF65FC000-memory.dmp

    Filesize

    9.9MB

  • memory/2576-65-0x000000001A680000-0x000000001A700000-memory.dmp

    Filesize

    512KB