Resubmissions

14-09-2023 12:20

230914-phrlvsee77 10

Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    14-09-2023 12:20

General

  • Target

    t40bd50ace847a114b83265af91b7.exe

  • Size

    315KB

  • MD5

    302fb687c1912342845fe7aa4517754c

  • SHA1

    4b38aa9b8cc0e9696c3d79ad057d9f1caad86c55

  • SHA256

    7b2dea7a8eff410159459e3f89c5e4fa81f8b9d2f6ce02cfaf8e307f3adf9f85

  • SHA512

    7f84eb441ed7b4e0296f37cc16015d96b9cf829648e46058248d3e7b731a443e2c549f07ba7632f49f12e44d6759efdc7ccadd184a87ac2aa19597d1263931da

  • SSDEEP

    6144:8T9+O50zYvPAtwVj6XbeBuQdwLaA19bUUyFLa:84H8XQ3QdwLaZUWL

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot6237712604:AAESgAGfaQ0EUC8eWgMd7kpAW_FEGRDRfDs/sendMessage?chat_id=880824160

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 11 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\t40bd50ace847a114b83265af91b7.exe
    "C:\Users\Admin\AppData\Local\Temp\t40bd50ace847a114b83265af91b7.exe"
    1⤵
    • Accesses Microsoft Outlook profiles
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • outlook_office_path
    • outlook_win_path
    PID:2200

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    344B

    MD5

    07b948b896e4962f2e350ca51766b028

    SHA1

    a7e20233b12f65a82310316ac39c11405b43bbbc

    SHA256

    7da8fdd70dbb5682091ed410908af16cd6d3cfd03d5a41cdd1e7886922c8b592

    SHA512

    aa8457e64248f8deae5498873c95a576d6a7be85e8f2e489aa5cf8658393a8b4cf1ae12e76d14001a2d5817a1230127ba78e5fe5524593e93019b06c96a5102d

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

    Filesize

    344B

    MD5

    d388da12a236a3e2bb687b348dd88b1b

    SHA1

    b1646e4bde1e532edfe3855617e2a652ac1e57d5

    SHA256

    268bace119f78e632d933a36527acb788b3712194fdb4a756c4411b845ca67d2

    SHA512

    3acac542163e62f5bd5ac4ef2e8d3ef2cf66b7af51a1408f73b0dedd1127edb32d8146d8ecd7cbde9fc6e99076955f43d3da40e9b228ca41d3d202a944cd40e8

  • C:\Users\Admin\AppData\Local\Temp\Cab7E56.tmp

    Filesize

    61KB

    MD5

    f3441b8572aae8801c04f3060b550443

    SHA1

    4ef0a35436125d6821831ef36c28ffaf196cda15

    SHA256

    6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

    SHA512

    5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

  • C:\Users\Admin\AppData\Local\Temp\Tar7E78.tmp

    Filesize

    163KB

    MD5

    9441737383d21192400eca82fda910ec

    SHA1

    725e0d606a4fc9ba44aa8ffde65bed15e65367e4

    SHA256

    bc3a6e84e41faeb57e7c21aa3b60c2a64777107009727c5b7c0ed8fe658909e5

    SHA512

    7608dd653a66cd364392a78d4711b48d1707768d36996e4d38871c6843b5714e1d7da4b4cc6db969e6000cfa182bcb74216ef6823d1063f036fc5c3413fb8dcf

  • memory/2200-0-0x0000000000840000-0x0000000000894000-memory.dmp

    Filesize

    336KB

  • memory/2200-1-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

    Filesize

    9.9MB

  • memory/2200-2-0x000000001AE70000-0x000000001AEF0000-memory.dmp

    Filesize

    512KB

  • memory/2200-101-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

    Filesize

    9.9MB

  • memory/2200-102-0x000000001AE70000-0x000000001AEF0000-memory.dmp

    Filesize

    512KB