Analysis

  • max time kernel
    150s
  • max time network
    160s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    14-10-2023 10:49

General

  • Target

    ib0905dda0f2c3e0ed1483d05a9f368aaf094.exe

  • Size

    324KB

  • MD5

    3a4b332f0b65e0590f1fc1f07a516a59

  • SHA1

    0ec94ea9e4e09abf1de65568b8864d21598cbcae

  • SHA256

    aaa5229f28d23d73480f06b29368808f6d23b7fdaa4c5946250084247cf2192c

  • SHA512

    34214d32b15bdf4ec70cf56876f110bdd36cdcd7e520ad0b9dd8ddbd85515f2baedda269dede378f43293c29efab81aec4f95c851a127fbb406c36796c4361c7

  • SSDEEP

    3072:QdrpN/JxLKd5hkMnSFw73WnRO5UrYKBxwK30MIQbkMl+IOc2MZhUeNMhlB+Fp7vM:5PsGI4pfoN32h6SKrbq9blQPffL

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot6021370805:AAFbCSlFairNgnxSj8mC6Wtf7PW5yGyWmcE/sendMessage?chat_id=6254396725

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
  • 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\ib0905dda0f2c3e0ed1483d05a9f368aaf094.exe
    "C:\Users\Admin\AppData\Local\Temp\ib0905dda0f2c3e0ed1483d05a9f368aaf094.exe"
    1⤵
    • Accesses Microsoft Outlook profiles
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • outlook_office_path
    • outlook_win_path
    PID:2364

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    344B

    MD5

    284890f5540d03d408c62108e2cbff32

    SHA1

    c456a3f17fe4fdf948b2c7b96ccdfa97e640d070

    SHA256

    bb47c876dee42e5360addb4d4f96ff024bd22f4c61a37f70d771e559f8bc9df6

    SHA512

    7f7feea8df237d8f98043166b1fb22b3db03afce202e9de086a2f5f3133962e148c0af9405ff68d9c78dd0e44bc15f82e10c26026903d09ee7ecd9598eda7689

  • C:\Users\Admin\AppData\Local\Temp\Cab7E27.tmp

    Filesize

    61KB

    MD5

    f3441b8572aae8801c04f3060b550443

    SHA1

    4ef0a35436125d6821831ef36c28ffaf196cda15

    SHA256

    6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

    SHA512

    5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

  • C:\Users\Admin\AppData\Local\Temp\Tar7E59.tmp

    Filesize

    163KB

    MD5

    9441737383d21192400eca82fda910ec

    SHA1

    725e0d606a4fc9ba44aa8ffde65bed15e65367e4

    SHA256

    bc3a6e84e41faeb57e7c21aa3b60c2a64777107009727c5b7c0ed8fe658909e5

    SHA512

    7608dd653a66cd364392a78d4711b48d1707768d36996e4d38871c6843b5714e1d7da4b4cc6db969e6000cfa182bcb74216ef6823d1063f036fc5c3413fb8dcf

  • memory/2364-0-0x0000000000920000-0x0000000000978000-memory.dmp

    Filesize

    352KB

  • memory/2364-1-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

    Filesize

    9.9MB

  • memory/2364-2-0x000000001ADC0000-0x000000001AE40000-memory.dmp

    Filesize

    512KB

  • memory/2364-67-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

    Filesize

    9.9MB

  • memory/2364-68-0x000000001ADC0000-0x000000001AE40000-memory.dmp

    Filesize

    512KB