General

  • Target
    2dbf556ed086f024f533e22c30d45e89.exe
  • Size 50.9MB
  • Sample261102-kpe47a11et
  • SHA256 3f803bafb2041916f177b065368c79ebce5e99c92fe1f4cf32b68c700aaba086
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • valleyrat_s2

Version
  • 25.8.31

C2
  • 137.220.136.165:13579

  • 137.220.136.165:16443

  • 137.220.136.165:17888

Attributes
  • campaign_date

    2026. 5.18

Targets

    • Target
      2dbf556ed086f024f533e22c30d45e89.exe
    • Size 50.9MB
    • SHA256 3f803bafb2041916f177b065368c79ebce5e99c92fe1f4cf32b68c700aaba086
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Family: ValleyRat

      ValleyRat stage2 is a backdoor written in C++.

    • Executes dropped EXE

    • Loads dropped DLL

    • Checks installed software on the system

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

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Target
      $PLUGINSDIR/System.dll
    • Size 25KB
    • SHA256 c7dd8cc8323e295b8821b0e320de208a7e20c068a8be8d03857520451ce9ded7
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    1/10
    • Target
      $PLUGINSDIR/nsDialogs.dll
    • Size 14KB
    • SHA256 a0a6431feb4e09018d99acdc02f2139fbacd68420b0f84d4b22a9e091aaac707
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    1/10
    • Target
      Uninst000.exe
    • Size 17.0MB
    • SHA256 5ccb093b750f727bf6b90729012771e5a5fc1923a1e58656910a80bc67bbeb62
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Target
      VC_redist.x64.exe
    • Size 17.9MB
    • SHA256 90e48ade404e4576d023abfa374f323555f233982a8805ea9ac63dca9491a16b
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    4/10
    • Target
      VC_redist.x86.exe
    • Size 6.7MB
    • SHA256 b6ab675f0a27e6600f9726e75dea08d99c15f8ea4b842a2a1d988fa9529d39b9
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    4/10
    • Target
      aacenc_utils.h
    • Size 7KB
    • SHA256 f17016ce1e335a0a5fba9b95a3272fb2f69c055168a7c558df6bc208ea575cf4
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    3/10
    • Target
      aarch64/pngdsp_neon.S
    • Size 10KB
    • SHA256 008756c716ba48937ee2d6b7542f9b19c1055bbf285c2106acf276f64b6e0c67
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    3/10
    • Target
      avcodec.h
    • Size 107KB
    • SHA256 909f5c2fe7caf26601c39cd96acbc6f58f49ec5a78914d2e5b524a3fc2571afc
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    5/10
    • Executes a VBScript file via the Windows Script Host.

    • Target
      cinepakenc.c
    • Size 48KB
    • SHA256 664c4b332da078e384805d024a0d611ae80fd80b365e726f01da1433d430f98b
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    5/10
    • Executes a VBScript file via the Windows Script Host.

    • Target
      elbg.c
    • Size 17KB
    • SHA256 720e1ad978c0546b52aee8e3485d548dda148cffced48e9ac292ad2ac9dd9a80
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    5/10
    • Executes a VBScript file via the Windows Script Host.

    • Target
      h264_cavlc.c
    • Size 42KB
    • SHA256 a78d92c371c8ae828fce8843f1a12516f80214647937187076997f71039c3700
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    5/10
    • Executes a VBScript file via the Windows Script Host.

    • Target
      intrax8.c
    • Size 24KB
    • SHA256 e0d9f428e6ccad574616caeb32019481fe6e02b721b71f526a7871bbe7c63337
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    5/10
    • Executes a VBScript file via the Windows Script Host.

    • Target
      intrax8.h
    • Size 3KB
    • SHA256 969628e89a1fd45f0923207fc98d7867c961fb769fda19e8d287b430b853a4ad
    • MD5 SHA1 SHA512 TLSH
    Score
    5/10
    • Executes a VBScript file via the Windows Script Host.

    • Target
      mfenc.c
    • Size 48KB
    • SHA256 3316376277521e352d91c90d12d64a5a527cd9f6c58d1ca9ad99f93909fe0b26
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    5/10
    • Executes a VBScript file via the Windows Script Host.

    • Target
      nvenc.c
    • Size 117KB
    • SHA256 463372174321a567cbcea4ea24d82844f01309bcf22a227037a4bb8b08957878
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    3/10

MITRE ATT&CK Enterprise v16

Tasks

static1

Score
3/10

behavioral1

bootkitdefense_evasiondiscoverypersistence
Score
7/10

behavioral2

backdoorbootkitdefense_evasiondiscoveryvalleyrat_s2persistence
Score
10/10

behavioral3

Score
1/10

behavioral4

Score
1/10

behavioral5

Score
1/10

behavioral6

Score
1/10

behavioral7

bootkitdefense_evasiondiscoverypersistence
Score
6/10

behavioral8

bootkitdefense_evasiondiscoverypersistence
Score
6/10

behavioral9

discovery
Score
4/10

behavioral10

discovery
Score
4/10

behavioral11

discovery
Score
4/10

behavioral12

discovery
Score
4/10

behavioral13

execution
Score
3/10

behavioral14

execution
Score
3/10

behavioral15

execution
Score
3/10

behavioral16

execution
Score
3/10

behavioral17

execution
Score
5/10

behavioral18

execution
Score
5/10

behavioral19

execution
Score
5/10

behavioral20

execution
Score
5/10

behavioral21

execution
Score
5/10

behavioral22

execution
Score
5/10

behavioral23

execution
Score
5/10

behavioral24

execution
Score
5/10

behavioral25

execution
Score
5/10

behavioral26

execution
Score
5/10

behavioral27

execution
Score
5/10

behavioral28

execution
Score
5/10

behavioral29

execution
Score
5/10

behavioral30

execution
Score
5/10

behavioral31

execution
Score
3/10

behavioral32

execution
Score
3/10