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Resubmissions

01/02/2025, 15:10

250201-skb6qsxmey 10

01/02/2025, 15:07

250201-shlmdszjdk 3

Analysis

  • max time kernel
    43s
  • max time network
    30s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    01/02/2025, 15:10

General

  • Target

    visa chker (2).exe

  • Size

    352KB

  • MD5

    16f434baf75d91420e232e8ba8ca1b2a

  • SHA1

    050485704f51dc24b8c36da438ef9af6cc8b8ea5

  • SHA256

    aa37a91d02342e352c232f16f028fee2148794db8306d71888949c18e194f4e0

  • SHA512

    d1ba40fe0a243653aeb765720aae32d1e5b6926f60ec2818723cc38edfd0be16c9c44c8c9e1e4aa6dd695d30d3b704d33010d2c40a7266f912590441d86c9e32

  • SSDEEP

    6144:cdRVzSkGTxSLD8uq5CaOPs47bhqUdh8SfkSE6GoE6Jrtqaw9/0G5:chqxSLo5C1Ps4Xhf8S8SRdvqawp0G5

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1335250212557553664/Oms0E9sA-BluxlQ8a6nVRKSu9r0-8RrnXNd784nPqqAqA4oT0r-8bktBBJO1h9UNPvm-

Signatures

  • Detect Umbral payload 1 IoCs
  • Umbral

    Umbral stealer is an opensource moduler stealer written in C#.

  • Umbral family
  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe
    "C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe"
    1⤵
    • System Location Discovery: System Language Discovery
    PID:2308
  • C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe
    "C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe"
    1⤵
    • System Location Discovery: System Language Discovery
    PID:2796
  • C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe
    "C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe"
    1⤵
    • System Location Discovery: System Language Discovery
    PID:2952
  • C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    1⤵
      PID:2924
    • C:\Windows\system32\AUDIODG.EXE
      C:\Windows\system32\AUDIODG.EXE 0x508
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2944
    • C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe
      "C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe"
      1⤵
      • System Location Discovery: System Language Discovery
      PID:2176
    • C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe
      "C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe"
      1⤵
      • System Location Discovery: System Language Discovery
      PID:2648

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\visa chker.exe

      Filesize

      229KB

      MD5

      c9e39a6033e4a4399063b8d15e57800e

      SHA1

      28fda7d8cfec95943fff27c4fda45da97318bb67

      SHA256

      94a4bb3d59972839fc26214ae5aeb004c88cf899e44eca49e460cc43f28d0dc2

      SHA512

      0b37422b8b4233206d559f584695d8135b325eb31d78ac97ee674ddc33494c72010170500ce39a1467b8acfb8289f68b059460a4f99ca913cdbee20430867f06

    • memory/2308-2-0x0000000000CE0000-0x0000000000CE1000-memory.dmp

      Filesize

      4KB