General

  • Target
    JK-18005144.zip
  • Size 1.9MB
  • Sample261015-pf5qpscw71
  • SHA256 07806661d056305e832b509a1b517241420d8aa6bccadaff5e0768d5131406fd
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • valleyrat_s2

Version
  • 1.0

C2
  • 202.61.157.33:21357

Targets

    • Target
      Notice from Tax Departmen.exe
    • Size 1021KB
    • SHA256 bfa5740f028a8f310ca01c779bbc5f2f1b435c41539c54de592f715bb0c10389
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detects ValleyRAT payload

    • Family: ValleyRat

      ValleyRat stage2 is a backdoor written in C++.

    • Adds Run key to start application

    • Enumerates connected drives

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

    • Target
      libvlc.dll
    • Size 2.1MB
    • SHA256 bf925516c54ec083532d22c4f7dec9bccc3104f2407fa38a047541776d89c13d
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detects ValleyRAT payload

    • Family: ValleyRat

      ValleyRat stage2 is a backdoor written in C++.

    • Executes dropped EXE

    • Adds Run key to start application

    • Checks installed software on the system

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

    • Enumerates connected drives

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

    • Target
      msvcp120.dll
    • Size 644KB
    • SHA256 3b92e964404e3f94531e7d7c4c7419561d9eca6accd98dc3979c9e3596db444c
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    1/10
    • Target
      msvcp140.dll
    • Size 572KB
    • SHA256 b5400f8454276f1adf944d8ba393866ca423603254baf88bca7dc4c1cf762116
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    1/10
    • Target
      msvcp140_1.dll
    • Size 25KB
    • SHA256 086e083da4e7a46438aff3188beb2c0d14cb38af216c62a880cd8209dfcfcca8
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    1/10
    • Target
      msvcp140_2.dll
    • Size 252KB
    • SHA256 5fd1bf62b065bd9a8bcbf8552d9ffd24f96341c10a4b93c5be0282a2f704fb2e
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    1/10
    • Target
      msvcp140_atomic_wait.dll
    • Size 39KB
    • SHA256 d4fdd222f3f2880651edf6802bc44710a3d66c691c3afb7fe2bf3229f06ff935
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    1/10
    • Target
      msvcp140_codecvt_ids.dll
    • Size 21KB
    • SHA256 109312ce9e35c66c8f411d1fc74aba902c46cd65ca40883d2eb779fb09031c33
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    1/10
    • Target
      vccorlib140.dll
    • Size 336KB
    • SHA256 430accf44c39446446cf541174ad4fa4e8a25e603c389a524caf8de1606e45be
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    1/10
    • Target
      vcruntime140.dll
    • Size 127KB
    • SHA256 98aea63f7c88d733504c08b165fd68a917e256f2cfaeaa742323ef6dddbbce29
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    1/10
    • Target
      vcruntime140_1.dll
    • Size 58KB
    • SHA256 1a1ca015a830a357ad5ec882845d732a60368b6c0d8247a009140cd518377f73
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    1/10
    • Target
      vcruntime140_threads.dll
    • Size 27KB
    • SHA256 2f2709047b2e0ec13e4e344f0a044453880fb179522f995d848589ad5e31637f
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    1/10

MITRE ATT&CK Enterprise v16

Tasks

static1

Score
5/10

behavioral1

backdoordefense_evasiondiscoveryexecutionvalleyrat_s2persistencetrojan
Score
10/10

behavioral2

backdoordefense_evasiondiscoveryexecutionvalleyrat_s2persistencetrojan
Score
10/10

behavioral3

backdoordefense_evasiondiscoveryexecutionvalleyrat_s2persistencetrojan
Score
10/10

behavioral4

backdoordefense_evasiondiscoveryexecutionvalleyrat_s2persistencetrojan
Score
10/10

behavioral5

Score
1/10

behavioral6

Score
1/10

behavioral7

Score
1/10

behavioral8

Score
1/10

behavioral9

Score
1/10

behavioral10

Score
1/10

behavioral11

Score
1/10

behavioral12

Score
1/10

behavioral13

Score
1/10

behavioral14

Score
1/10

behavioral15

Score
1/10

behavioral16

Score
1/10

behavioral17

Score
1/10

behavioral18

Score
1/10

behavioral19

Score
1/10

behavioral20

Score
1/10

behavioral21

Score
1/10

behavioral22

Score
1/10

behavioral23

Score
1/10

behavioral24

Score
1/10