Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-12-2023 03:01

General

  • Target

    eb67d871e5083cd4c7fec4b3b4cec784.exe

  • Size

    3.4MB

  • MD5

    eb67d871e5083cd4c7fec4b3b4cec784

  • SHA1

    dc974e0f89f9f0d490440b89213464d8855f0418

  • SHA256

    521b1395b947f821a695994fed1ffe1d547bbeb5aa3b35b2a1516cd5ea273c19

  • SHA512

    2af4c8fc6f9c3b011e65354eaec8c044d1ce202312fa77dd5d30d779adf5eab6287810ad82768ddbe6f470f81c5e1084ddacac91f2d11a2b89c49b6420898ef0

  • SSDEEP

    49152:GGKOYf0MEuUlamkbmCF2Qtyj+N90zcAAEltjdDwYXjYV1a+budGzU9BbUaQ6OdtX:+FhElamvCFPOTZhPE4+adGY9BoIMtX

Score
8/10

Malware Config

Signatures

  • Downloads MZ/PE file
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • UPX packed file 6 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates connected drives 3 TTPs 2 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\eb67d871e5083cd4c7fec4b3b4cec784.exe
    "C:\Users\Admin\AppData\Local\Temp\eb67d871e5083cd4c7fec4b3b4cec784.exe"
    1⤵
    • Loads dropped DLL
    • Enumerates connected drives
    • Modifies system certificate store
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:724
    • C:\Users\Admin\AppData\Local\Temp\eb67d871e5083cd4c7fec4b3b4cec784.exe
      C:\Users\Admin\AppData\Local\Temp\eb67d871e5083cd4c7fec4b3b4cec784.exe --type=crashpad-handler /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\Crash Reports" "--crash-count-file=C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\crash_count.txt" --url=https://crashstats-collector.opera.com/collector/submit --annotation=channel=Stable --annotation=plat=Win32 --annotation=prod=OperaDesktopGX --annotation=ver=105.0.4970.63 --initial-client-data=0x2fc,0x300,0x304,0x2d8,0x308,0x7556d550,0x7556d560,0x7556d56c
      2⤵
      • Loads dropped DLL
      PID:2060
    • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\eb67d871e5083cd4c7fec4b3b4cec784.exe
      "C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\eb67d871e5083cd4c7fec4b3b4cec784.exe" --version
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      PID:4956
    • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202312290301461\assistant\Opera_GX_assistant_73.0.3856.382_Setup.exe_sfx.exe
      "C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202312290301461\assistant\Opera_GX_assistant_73.0.3856.382_Setup.exe_sfx.exe"
      2⤵
      • Executes dropped EXE
      PID:2064
    • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202312290301461\assistant\assistant_installer.exe
      "C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202312290301461\assistant\assistant_installer.exe" --version
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:1192
  • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202312290301461\assistant\assistant_installer.exe
    "C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202312290301461\assistant\assistant_installer.exe" --type=crashpad-handler /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\Crash Reports" "--crash-count-file=C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\crash_count.txt" --url=https://crashstats-collector.opera.com/collector/submit --annotation=channel=Stable --annotation=plat=Win32 --annotation=prod=OperaDesktopGX --annotation=ver=73.0.3856.382 --initial-client-data=0x26c,0x270,0x274,0x248,0x278,0xc64f48,0xc64f58,0xc64f64
    1⤵
    • Executes dropped EXE
    PID:3292

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202312290301461\additional_file0.tmp

    Filesize

    638KB

    MD5

    023d5231a14987ebbb4d49d819a8a0a2

    SHA1

    427da58869dbcf2818e35802a4da333c289c135c

    SHA256

    e5646fadc97f26dc028a168446da8abe292111ab534558ae96aa3b349f120ba5

    SHA512

    a383d047a9c1652fe07897ba67424c12522442d8e6cd0243bdc55ebc9f3731cd60aab903d3989236e9f322ca1381afc3bbccd890933d28be4df1854d7371590c

  • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202312290301461\assistant\Opera_GX_assistant_73.0.3856.382_Setup.exe_sfx.exe

    Filesize

    894KB

    MD5

    e1e5828e07da92474b5b7b8ebc90a40b

    SHA1

    6dd487c47557a0dafa7da16724ee39b6692e36fb

    SHA256

    f4407edae29601e7ef5926da72dfa8db9980cf1323c8e1a37075e34d9942e47f

    SHA512

    9a4d79479e802c678f7fcaf2acbac1ce40f94fba81a8d5cfe3bc3c0fe7d14b87a785ecf4398e2c4a65def583a5c6c4227e5903bba628b2ab52665e4515450d05

  • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202312290301461\assistant\Opera_GX_assistant_73.0.3856.382_Setup.exe_sfx.exe

    Filesize

    1024KB

    MD5

    8e6352af1e5ec9d5e723d3f3a8e9a88b

    SHA1

    041d84bda3992b55ab02f6022ebef35e9d434480

    SHA256

    fbf541d77bdc91bb1104b4559090998f43a7ec33da306a43bdf7f07563b10789

    SHA512

    5274c434c94480e96e118259ab41f442ae9e75ae8b4f9dec6ba853c0847306c3e977f7a46898b2e947b8399a546c9311943d9f6136d1c925b9fb00305ae43e46

  • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202312290301461\assistant\assistant_installer.exe

    Filesize

    92KB

    MD5

    d92800606d00e66004ff66f337385f81

    SHA1

    173609a5e8da46af56d4c9934ba9a814279a58a3

    SHA256

    9a61931b3a4939fc0fc3c12a92cb522a7729ee0059a05426d0a1e4f5a5a555a9

    SHA512

    2bbad83e891809345a8c3dbb7d99f00e96ca51a4a21b0a916ac1dbfb34520ffd38d6659956d82d53c22cc65b8e52cc4261b7cbc198cfb35fd1df2ec20eac496d

  • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202312290301461\assistant\assistant_installer.exe

    Filesize

    96KB

    MD5

    eb0acc1497a9419ff7eed9e65369a3c4

    SHA1

    15031d9a53ce25668c3118456a3a551fc53e4ba9

    SHA256

    7eaad19dd16e036df22016b741dc0f5777a4ad7aacb1f06a2eff5b8f20f555ee

    SHA512

    54a50745f3592cc54bdc66b6de8c040f236b258172de06bcc530e07831dc7d55febc382c6a13d2fcf0949e0f643b8996adcf3849d4da54a8338cfc4636efad30

  • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202312290301461\opera_package

    Filesize

    57KB

    MD5

    5a8bb3da783fab2a4e4380e81ab9e2e2

    SHA1

    fedd3ef6628f0feaf8acda3cade25d75660fc4d6

    SHA256

    108c04cf3fa2da52d295e5d4fed785a20c9ee1aa59dedb5c90562a62c4d5722b

    SHA512

    e215a00f6a76225bde7b1332722a84dea182e243e9e36537068ec1b111e26f766b7d767c10616c6517eac3436f3500f534e701b0950ae8e035c627a8082047b1

  • C:\Users\Admin\AppData\Local\Temp\Opera_installer_231229030146421724.dll

    Filesize

    98KB

    MD5

    ce6a7872342d944e03e6d3a13b473fe0

    SHA1

    1769288c63f0866ff4b2cae5ec2b886c836ddf4c

    SHA256

    d126e6855fffadb6f5c955cab8622d92d0299ba6640d6454189ea94561b4427a

    SHA512

    625f56a9cb7e05261c0a3a4c8a8f650e8dd70c72c0cfb6d4d5c6f83171abf614bc7f86f4a6b22cfde7001531e5d74323e7686915104dc902f9fdf158d24a69e4

  • C:\Users\Admin\AppData\Local\Temp\Opera_installer_2312290301467644956.dll

    Filesize

    381KB

    MD5

    b33a5c76be4c3094d9c99016897747b3

    SHA1

    d02a5c3ec106c41687174232c58cbf3a3e22d8e1

    SHA256

    3cf6cda4e515c00d125b4c8e1f9ac1c90352c073b0ac624e8b609ce397e1d8cb

    SHA512

    21988831b9d057e09d08b3d1f29a088815dde52f26763d76ddadc5bf9c3024c6b2c3faa8b4f9d85303507682ed07adf3544befb2f38ace43ae0ecf97fcfb34d5

  • C:\Users\Admin\AppData\Local\Temp\Opera_installer_2312290301467644956.dll

    Filesize

    384KB

    MD5

    81c24094a14224145a484b8547488613

    SHA1

    f4468abf152bc07a078ac34077d17b0c7413f649

    SHA256

    87671dde1f5977b471d248b090d5b53e2a3be117d1f7d2b6d56a0c01ebc293e3

    SHA512

    7f7b9a782c2312014631ccb7ea96973eed2bec0c481a30909153cb14119c2580f5c1bc6df09652733fbbba715f9c91a8fe4c191b86025b8cf68a3b0047baf52b

  • C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\Crash Reports\settings.dat

    Filesize

    40B

    MD5

    ebed7bda5dd4dc6880281865cbaa7bec

    SHA1

    5bbc6b5ace72185a3eec236982de83010fb75285

    SHA256

    7e37dfd3c99c3086ef548a379f652c25eaee0495b931180fa46b1e763ee809f3

    SHA512

    d3ec50baf176ac743463dc309b304769e6c771663498790e35b2dc299f19dd9ac94a040100e10f91e641976abc9773d9e9c416f3f53eda77bd740d26962af631

  • memory/724-40-0x0000000000B40000-0x00000000010F0000-memory.dmp

    Filesize

    5.7MB

  • memory/724-0-0x0000000000B40000-0x00000000010F0000-memory.dmp

    Filesize

    5.7MB

  • memory/2060-41-0x0000000000B40000-0x00000000010F0000-memory.dmp

    Filesize

    5.7MB

  • memory/2060-5-0x0000000000B40000-0x00000000010F0000-memory.dmp

    Filesize

    5.7MB

  • memory/4956-15-0x0000000000B70000-0x0000000001120000-memory.dmp

    Filesize

    5.7MB

  • memory/4956-19-0x0000000000B70000-0x0000000001120000-memory.dmp

    Filesize

    5.7MB