Analysis

  • max time kernel
    8s
  • max time network
    47s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    29-10-2022 00:16

General

  • Target

    a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe

  • Size

    52KB

  • MD5

    0ab5a0cab786688729462c7f947041e1

  • SHA1

    3efa45beba70450f97ac66deb6c4cdecaefbbd36

  • SHA256

    a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f

  • SHA512

    220e02eab8a854cc6fb6e3f41c66c21fa937078a32029174e662345e661ecf091a85f9a170119e3b5c3d134021bba9889d7bc77059fdc050f47632c8940a2a5f

  • SSDEEP

    768:ZBexmBBSvNF0Kkn1TLaPC1XSlsiTCHpySXckZzXvakTkEqUNOrQQ8w59gCb5g/UT:XamBAvlknV24TrCkTkQNOCJUD

Malware Config

Signatures

  • Possible privilege escalation attempt 2 IoCs
  • Modifies file permissions 1 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe
    "C:\Users\Admin\AppData\Local\Temp\a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in System32 directory
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1520
    • C:\Windows\SysWOW64\takeown.exe
      C:\Windows\system32\takeown.exe /f "c:\windows\system32\mkemr.exe"
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:2044
    • C:\Windows\SysWOW64\icacls.exe
      C:\Windows\system32\icacls.exe "c:\windows\system32\mkemr.exe" /grant Users:F
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:944

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

File Permissions Modification

1
T1222

Modify Registry

1
T1112

Replay Monitor

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Downloads

  • \??\c:\windows\SysWOW64\mkemr.exe
    Filesize

    21KB

    MD5

    3207672c816972bba833909c93b3a316

    SHA1

    251fd4f6f1d240f94f063031f37e49f40610d7d0

    SHA256

    0dd85a29b10e14adfe3a0f203e9f7607be85332838993532e46216a9414a4543

    SHA512

    53749b01c170c0fc6f6e04fce3758f215eada8225d2cc51fc9db80257912d501993f8d14362bcb3e829d0f18dc56b57e8b3dbe7aafb6d88131e56704e12b4cdb

  • memory/944-57-0x0000000000000000-mapping.dmp
  • memory/2044-56-0x0000000000000000-mapping.dmp