Analysis

  • max time kernel
    76s
  • max time network
    151s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    14-01-2021 07:11

General

  • Target

    Reports 78497.xls

  • Size

    875KB

  • MD5

    e452debc1653b43f09dcd98d1f05ba14

  • SHA1

    d68fb05919682ac456701041a955a42d6198b3ef

  • SHA256

    59d0ba2bce05366ad852a51dd0e9387ae38ea0493f9ad8368e47a55903117018

  • SHA512

    a89b049ce90147915cf09bdf36a506afa19f8c440f50a1db0cd1c7437bf522ca977559b4d9ab0a637534b5b5d0fb911e0e5d9104d5b46a91f5a502cfbf6d7413

Malware Config

Extracted

Family

dridex

Botnet

111

C2

52.73.70.149:443

8.4.9.152:3786

185.246.87.202:3098

50.116.111.64:5353

rc4.plain
rc4.plain

Signatures

  • Dridex

    Dridex(known as Bugat/Cridex) is a form of malware that specializes in stealing bank credentials.

  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Dridex Loader 1 IoCs

    Detects Dridex both x86 and x64 loader in memory.

  • Blocklisted process makes network request 2 IoCs
  • Loads dropped DLL 1 IoCs
  • JavaScript code in executable 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Checks processor information in registry 2 TTPs 3 IoCs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 42 IoCs
  • Suspicious use of SetWindowsHookEx 12 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
    "C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\Reports 78497.xls"
    1⤵
    • Checks processor information in registry
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:508
  • C:\Windows\system32\wbem\wmic.exe
    wmic
    1⤵
    • Process spawned unexpected child process
    • Blocklisted process makes network request
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2192
    • C:\Windows\System32\rundll32.exe
      "C:\Windows\System32\rundll32.exe" C:/Windows/Temp//he09m.dll InitHelperDll
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1560
      • C:\Windows\SysWOW64\rundll32.exe
        "C:\Windows\System32\rundll32.exe" C:/Windows/Temp//he09m.dll InitHelperDll
        3⤵
        • Loads dropped DLL
        PID:3120

Network

MITRE ATT&CK Matrix ATT&CK v6

Discovery

System Information Discovery

3
T1082

Query Registry

2
T1012

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Roaming\B638.xsL
    MD5

    700d9ef5283e8dca4a53b60e5674941e

    SHA1

    e6bd6c2d88c640b8983a1cb2f4007c67d205801c

    SHA256

    c893bb57aeb12a781bcb21a5c6c574e53786a0173f1bf45d7ef57860a8956a48

    SHA512

    fe3496c0e5ce6bd84838a6a87ead6e9a8c331ea3bc39c3993a7e6e7c9ae6aabeec3ca1fd3bef87b0f1232658b367820f856593f901d52772dc6e16240a7a7754

  • C:\Windows\Temp\he09m.dll
    MD5

    dd7f7a7ce66d36bb2b214e51e7426b9e

    SHA1

    a669b7ebe3bf03152fc4284e2b09acee0828051d

    SHA256

    342bae2521a4409d329f86be3d543f928db597b98b84010f2b0e32c23145d634

    SHA512

    ca3cebba72f0ac7a99c8315e08c5cd7bbd441af71286eb2b40aedb32758981bd14381a3f647f064cbb154e3f1e5c6cf2e4d8b253a99b1eb13939cc435c19ee16

  • \Windows\Temp\he09m.dll
    MD5

    dd7f7a7ce66d36bb2b214e51e7426b9e

    SHA1

    a669b7ebe3bf03152fc4284e2b09acee0828051d

    SHA256

    342bae2521a4409d329f86be3d543f928db597b98b84010f2b0e32c23145d634

    SHA512

    ca3cebba72f0ac7a99c8315e08c5cd7bbd441af71286eb2b40aedb32758981bd14381a3f647f064cbb154e3f1e5c6cf2e4d8b253a99b1eb13939cc435c19ee16

  • memory/508-2-0x00007FF9A7230000-0x00007FF9A7867000-memory.dmp
    Filesize

    6.2MB

  • memory/1560-4-0x0000000000000000-mapping.dmp
  • memory/3120-6-0x0000000000000000-mapping.dmp
  • memory/3120-8-0x0000000073980000-0x000000007399F000-memory.dmp
    Filesize

    124KB