Analysis

  • max time kernel
    39s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    25-11-2022 04:33

General

  • Target

    16d518950206d542ad952ddcbb49b671ef986ecc5a5625b3c52a45ee84bab597.exe

  • Size

    4.3MB

  • MD5

    4fe55691c4aa64a2a1fdd001b637e5e1

  • SHA1

    c6d03faf17f3b93aa7571bc8723c5e6eb297bb87

  • SHA256

    16d518950206d542ad952ddcbb49b671ef986ecc5a5625b3c52a45ee84bab597

  • SHA512

    a27aedefc719214de8a55516dbcbc6754ebae1f8864de86fe655b8d8e0590c4cf720ab69243546a7cf7dbfa35aacc3905fec7fb2f2e964bb4e26bc570953aebc

  • SSDEEP

    98304:UWsZh7PXNFHCa/jXVa0/cD7HjPeffCSG7TPU:G3jXzjXVa7PeffFG7L

Malware Config

Signatures

  • Registers COM server for autorun 1 TTPs 4 IoCs
  • Loads dropped DLL 3 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Installs/modifies Browser Helper Object 2 TTPs 8 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

  • Drops file in Program Files directory 8 IoCs
  • Modifies Internet Explorer settings 1 TTPs 8 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • System policy modification 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\16d518950206d542ad952ddcbb49b671ef986ecc5a5625b3c52a45ee84bab597.exe
    "C:\Users\Admin\AppData\Local\Temp\16d518950206d542ad952ddcbb49b671ef986ecc5a5625b3c52a45ee84bab597.exe"
    1⤵
    • Loads dropped DLL
    • Installs/modifies Browser Helper Object
    • Drops file in Program Files directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:900
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32.exe /s "C:\Program Files (x86)\GoSave\crjMVS7pg0Kjbt.x64.dll"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2004
      • C:\Windows\system32\regsvr32.exe
        /s "C:\Program Files (x86)\GoSave\crjMVS7pg0Kjbt.x64.dll"
        3⤵
        • Registers COM server for autorun
        • Loads dropped DLL
        • Installs/modifies Browser Helper Object
        • Modifies Internet Explorer settings
        • Modifies registry class
        PID:1968

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Browser Extensions

1
T1176

Defense Evasion

Modify Registry

3
T1112

Discovery

Query Registry

1
T1012

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Program Files (x86)\GoSave\crjMVS7pg0Kjbt.dat
    Filesize

    4KB

    MD5

    ca3d44566080731632cbb0bb6d663410

    SHA1

    ac0b7ffde4aaaf874c7f29436f94237956637edc

    SHA256

    a9cf717a40c6f921777a149a7e4654d52c25cf69dae710326a3a5b5bffba49f5

    SHA512

    408c6985a094461d7f894a6af17f297f1e54b836b2a38c826b5476a1f830b2eaa176df1e25cf143cde7942635d48a7d5373caa8d302d49e6c49a33af697c4f39

  • C:\Program Files (x86)\GoSave\crjMVS7pg0Kjbt.tlb
    Filesize

    3KB

    MD5

    5b503f1b4056c3d4fbf2d03f88e1adfe

    SHA1

    c8d659ea27bf0ca0bbfd46865d5796589bf9ef68

    SHA256

    231ef0fef77ab6c7fea053f64a9ce7f9e21646b868bfe391962262fc15c9bb6c

    SHA512

    229207201368d9674258389df19132070390f913aa5cc21b7567c515be5f5e0f07cdaa460d497ae355f27f00f7fc75538783d8890f6c9c0e861a7ecb8f520bdb

  • C:\Program Files (x86)\GoSave\crjMVS7pg0Kjbt.x64.dll
    Filesize

    885KB

    MD5

    1a6b1013f17c1cdc6e98f82cd2568ea8

    SHA1

    c96e7bdba616743a5c05b08a342d89ed102376b0

    SHA256

    fa9dd2bd7850053b251c9b5f27f1ac43ad04abf85de61b1928b7c2d562d3290a

    SHA512

    10596f46c52ca3f50d6b3c7c894fff8b41f4fe920c6e5e0138cf7e95e85bfe1db8d5f1a63939832cd48cf29f571dd36de40ebb931fb9b14a106518ae4fc17ef9

  • \Program Files (x86)\GoSave\crjMVS7pg0Kjbt.dll
    Filesize

    747KB

    MD5

    d949da968ea04ac3a7ddf0e300bb32be

    SHA1

    581d7d799c538b8e9e578cf57c420fb802d5a201

    SHA256

    5c4756451acf8622efa75639f9131ca8215c165e2ef21cc1ab7f8fee77db462b

    SHA512

    fd00e332af52646425f0d4032bb1bbfc85a44ff274bcf212f1264a29be546db4c1ceab7da32c70248a6baa2c55d2dff47dcb2ac441c783a1d9d1260c4685eb7e

  • \Program Files (x86)\GoSave\crjMVS7pg0Kjbt.x64.dll
    Filesize

    885KB

    MD5

    1a6b1013f17c1cdc6e98f82cd2568ea8

    SHA1

    c96e7bdba616743a5c05b08a342d89ed102376b0

    SHA256

    fa9dd2bd7850053b251c9b5f27f1ac43ad04abf85de61b1928b7c2d562d3290a

    SHA512

    10596f46c52ca3f50d6b3c7c894fff8b41f4fe920c6e5e0138cf7e95e85bfe1db8d5f1a63939832cd48cf29f571dd36de40ebb931fb9b14a106518ae4fc17ef9

  • \Program Files (x86)\GoSave\crjMVS7pg0Kjbt.x64.dll
    Filesize

    885KB

    MD5

    1a6b1013f17c1cdc6e98f82cd2568ea8

    SHA1

    c96e7bdba616743a5c05b08a342d89ed102376b0

    SHA256

    fa9dd2bd7850053b251c9b5f27f1ac43ad04abf85de61b1928b7c2d562d3290a

    SHA512

    10596f46c52ca3f50d6b3c7c894fff8b41f4fe920c6e5e0138cf7e95e85bfe1db8d5f1a63939832cd48cf29f571dd36de40ebb931fb9b14a106518ae4fc17ef9

  • memory/900-54-0x0000000076121000-0x0000000076123000-memory.dmp
    Filesize

    8KB

  • memory/900-55-0x0000000002A10000-0x0000000002AD6000-memory.dmp
    Filesize

    792KB

  • memory/1968-65-0x0000000000000000-mapping.dmp
  • memory/1968-66-0x000007FEFBD81000-0x000007FEFBD83000-memory.dmp
    Filesize

    8KB

  • memory/2004-61-0x0000000000000000-mapping.dmp