Resubmissions

24-09-2023 08:26

230924-kcbw1aeg88 10

22-08-2023 14:37

230822-rzc6xacg63 10

Analysis

  • max time kernel
    117s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    24-09-2023 08:26

General

  • Target

    EXPENSIVE LOADER.exe

  • Size

    1.3MB

  • MD5

    bfb9334833749790c0df81ab1489c5a9

  • SHA1

    b38e3080dfb1d35ae303b9f0c14a7cf12621de7c

  • SHA256

    cc16768fe66b11c07282c6d5d543701b85b283a44de51fdd4a9bd2a014f37b68

  • SHA512

    e41a66d9932f7853c9015ef0361cfbf4702a31d356e97dae1fb9ece085b808cac0e9a5d6d70a2763d08b3f940aacc074181bae6755077933d97f9a92b93c65d1

  • SSDEEP

    24576:bw3SBs2Mhfs2OcpIi5aO9z1dn7Az8Zk61NlPXYpky7vKCB/nO:E3P2MhkPTaz1tswiKPXYpkyjKCB/O

Malware Config

Signatures

  • 44Caliber

    An open source infostealer 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 cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\EXPENSIVE LOADER.exe
    "C:\Users\Admin\AppData\Local\Temp\EXPENSIVE LOADER.exe"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:1704

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    344B

    MD5

    e122fe1c94496ea824140b2aa2f96ecc

    SHA1

    f846eb6bca27c7c53368911f5065461686b3d5e3

    SHA256

    eec3db06f39320250fe8998d739a79cbb679b02edd8a62c7b6c33c8a997c93eb

    SHA512

    0d66051fc5cb516868c17889dff8d0f073007e4d54c2ef9743ffb53d908e795f239267ba7a9429cc138a8b5473fcbc3fa6a66466b61ce49f2636f39e7496a396

  • C:\Users\Admin\AppData\Local\44\Browsers\Firefox\Bookmarks.txt

    Filesize

    105B

    MD5

    2e9d094dda5cdc3ce6519f75943a4ff4

    SHA1

    5d989b4ac8b699781681fe75ed9ef98191a5096c

    SHA256

    c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

    SHA512

    d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

  • C:\Users\Admin\AppData\Local\Temp\Cab73C0.tmp

    Filesize

    61KB

    MD5

    f3441b8572aae8801c04f3060b550443

    SHA1

    4ef0a35436125d6821831ef36c28ffaf196cda15

    SHA256

    6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

    SHA512

    5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

  • C:\Users\Admin\AppData\Local\Temp\Tar74EC.tmp

    Filesize

    163KB

    MD5

    9441737383d21192400eca82fda910ec

    SHA1

    725e0d606a4fc9ba44aa8ffde65bed15e65367e4

    SHA256

    bc3a6e84e41faeb57e7c21aa3b60c2a64777107009727c5b7c0ed8fe658909e5

    SHA512

    7608dd653a66cd364392a78d4711b48d1707768d36996e4d38871c6843b5714e1d7da4b4cc6db969e6000cfa182bcb74216ef6823d1063f036fc5c3413fb8dcf

  • memory/1704-10-0x0000000000350000-0x000000000075A000-memory.dmp

    Filesize

    4.0MB

  • memory/1704-13-0x00000000740A0000-0x000000007478E000-memory.dmp

    Filesize

    6.9MB

  • memory/1704-12-0x0000000000350000-0x000000000075A000-memory.dmp

    Filesize

    4.0MB

  • memory/1704-14-0x00000000044C0000-0x0000000004500000-memory.dmp

    Filesize

    256KB

  • memory/1704-11-0x0000000077390000-0x0000000077391000-memory.dmp

    Filesize

    4KB

  • memory/1704-0-0x0000000000350000-0x000000000075A000-memory.dmp

    Filesize

    4.0MB

  • memory/1704-2-0x0000000000350000-0x000000000075A000-memory.dmp

    Filesize

    4.0MB

  • memory/1704-1-0x0000000000130000-0x0000000000131000-memory.dmp

    Filesize

    4KB

  • memory/1704-126-0x0000000000350000-0x000000000075A000-memory.dmp

    Filesize

    4.0MB

  • memory/1704-127-0x00000000740A0000-0x000000007478E000-memory.dmp

    Filesize

    6.9MB