Analysis

  • max time kernel
    124s
  • max time network
    133s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    14-10-2023 22:58

General

  • Target

    836b2ce0fadfed7dcad8a1df8032524171856615f6d88bbd59dcbaf1354c94ba.exe

  • Size

    3.2MB

  • MD5

    0de7671d0c52234367e73b745aa915f7

  • SHA1

    a185063e64ea8572acb0dfb2f02e7138a9a54cb3

  • SHA256

    836b2ce0fadfed7dcad8a1df8032524171856615f6d88bbd59dcbaf1354c94ba

  • SHA512

    2068b6b3769d9fda6836eb3e623c1f3012bbcfad2b8dccdd24e5cae0be6efd5f65d335f4b536fd8309ba45d73854c5dd928ce37e3817d241c18baca5c1a4b918

  • SSDEEP

    49152:iH334Nlk/LvOXLJaocSyI//T6INE+Ypiy:g4p7ASyITdO+Y

Malware Config

Extracted

Family

cobaltstrike

Botnet

100000

C2

http://www.ycxiao.tk:8443/api/3

Attributes
  • access_type

    512

  • beacon_type

    2048

  • host

    www.ycxiao.tk,/api/3

  • http_header1

    AAAAEAAAAA9Ib3N0OiB5Y3hpYW8udGsAAAAHAAAAAAAAAAMAAAAGAAAABkNvb2tpZQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=

  • http_header2

    AAAAEAAAAA9Ib3N0OiB5Y3hpYW8udGsAAAAHAAAAAAAAAAwAAAAHAAAAAQAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=

  • http_method1

    GET

  • http_method2

    POST

  • polling_time

    60000

  • port_number

    8443

  • sc_process32

    %windir%\syswow64\rundll32.exe

  • sc_process64

    %windir%\sysnative\rundll32.exe

  • state_machine

    MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCG3ssV8PuKaHFEyyrRoRIPIrbr3qOvXEKt1sOUB3yvOSNRzUTvhSc8hcKhAmqnPIMTlHHKHyQhGrC1wdn6MabsertHPnXQ9WdsmDdFQGwoew19JxMNEbbPf34mt+w54jskSwgHGQf/M3EeP/26MxLN1jn0sBHpaoeXkjdwBLev9wIDAQABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==

  • unknown1

    4096

  • unknown2

    AAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==

  • uri

    /api/4

  • user_agent

    Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; BOIE9;ENUSSEM)

  • watermark

    100000

Signatures

  • Cobaltstrike

    Detected malicious payload which is part of Cobaltstrike.

  • Modifies system certificate store 2 TTPs 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\836b2ce0fadfed7dcad8a1df8032524171856615f6d88bbd59dcbaf1354c94ba.exe
    "C:\Users\Admin\AppData\Local\Temp\836b2ce0fadfed7dcad8a1df8032524171856615f6d88bbd59dcbaf1354c94ba.exe"
    1⤵
    • Modifies system certificate store
    PID:1940

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    344B

    MD5

    7bc8fa759841a8d8764604b44faffc05

    SHA1

    c09afd20d1e91805a01960e071a107121bc90ac0

    SHA256

    7fc9b92bd9c546866b9d0a0157e4fba35e8a4cf08a99746144f4f1a155407491

    SHA512

    768c4f9505a1c7ad312d0ce62a87c3ae9693e6fb688e1452a7ab9bf95710e29827eaa2248aa08d716baa766ab76880891f01a35af6536c29adb16ae9d2d99872

  • C:\Users\Admin\AppData\Local\Temp\Cab3D8F.tmp

    Filesize

    61KB

    MD5

    f3441b8572aae8801c04f3060b550443

    SHA1

    4ef0a35436125d6821831ef36c28ffaf196cda15

    SHA256

    6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

    SHA512

    5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

  • C:\Users\Admin\AppData\Local\Temp\Tar3DEF.tmp

    Filesize

    163KB

    MD5

    9441737383d21192400eca82fda910ec

    SHA1

    725e0d606a4fc9ba44aa8ffde65bed15e65367e4

    SHA256

    bc3a6e84e41faeb57e7c21aa3b60c2a64777107009727c5b7c0ed8fe658909e5

    SHA512

    7608dd653a66cd364392a78d4711b48d1707768d36996e4d38871c6843b5714e1d7da4b4cc6db969e6000cfa182bcb74216ef6823d1063f036fc5c3413fb8dcf

  • memory/1940-0-0x0000000047E60000-0x0000000047EA1000-memory.dmp

    Filesize

    260KB

  • memory/1940-1-0x0000000047F70000-0x0000000047FBF000-memory.dmp

    Filesize

    316KB