Resubmissions

13-10-2024 12:02

241013-n7wrfazfnm 6

13-10-2024 11:47

241013-nxwzfszbrq 6

Analysis

  • max time kernel
    152s
  • max time network
    169s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    13-10-2024 11:47

General

  • Target

    YoudaoDict_fanyiweb_navigation.msi

  • Size

    187.0MB

  • MD5

    70aeba0286a77763521f8c06a1cebf60

  • SHA1

    24af28f2b995668258e108dd44bc4c9111192c13

  • SHA256

    04c09c1d4c7674a6a70fcc6aa742aa300bd78f724d6de610d3809b444326b12f

  • SHA512

    4f2b9d38e8abdcb4bcc75b6445519a8ebec0c6770b4f5c0c2c0e8890c88bce47bfcfa0fc22b523304b155782151d32e7501cbd2d36af7cd9f5492360e8bbaee0

  • SSDEEP

    3145728:rObtNwBblcqir6N2pdI5OExQPPc0Bi8NKIM5ZTs5+IVzqYqBMeutEsSQHXLY+gQe:Shdueq5dxQncq2RBs5XzqABtEqTjtxO

Malware Config

Signatures

  • Blocklisted process makes network request 10 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Drops file in System32 directory 4 IoCs
  • Drops file in Windows directory 15 IoCs
  • Loads dropped DLL 5 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies data under HKEY_USERS 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\YoudaoDict_fanyiweb_navigation.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:2200
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2868
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 86F3F8495E15B2A8DCAAFC1CC4C8275E
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:2600
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding B12403201B59C22787D0BA8CA7F19147 M Global\MSI0000
      2⤵
      • Blocklisted process makes network request
      • Drops file in System32 directory
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:472
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3024
  • C:\Windows\system32\DrvInst.exe
    DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot19" "" "" "61530dda3" "0000000000000000" "0000000000000060" "00000000000005D8"
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Suspicious use of AdjustPrivilegeToken
    PID:2092

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\Installer\MSI3A23.tmp

    Filesize

    904KB

    MD5

    421643ee7bb89e6df092bc4b18a40ff8

    SHA1

    e801582a6dd358060a699c9c5cde31cd07ee49ab

    SHA256

    d6b89fd5a95071e7b144d8bedcb09b694e9cd14bfbfafb782b17cf8413eac6da

    SHA512

    d59c4ec7690e535da84f94bef2be7f94d6bfd0b2908fa9a67d0897abe8a2825fd52354c495ea1a7f133f727c2ee356869cc80bacf5557864d535a72d8c396023

  • \Windows\Installer\MSI4A9B.tmp

    Filesize

    760KB

    MD5

    df6d353853f28e4c4c0464b83f5220f2

    SHA1

    d714c58314b018f6599c4ff0518d2867bb3eca44

    SHA256

    dc64604e2a5dd9f1c01fd583f847d871269d680f1241644db0828e3adaf7067b

    SHA512

    3cfd6150e69c3e1201c57a43ab31a8021703ebf03271d1f6eb9cd20b3283484364bad905041b4a1b5e7139e9ecbb60764be6cb4c975be73e3c9413d6cd6a22be