Analysis

  • max time kernel
    148s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21/06/2022, 09:29

General

  • Target

    TST - Statement of Accounts(S).xlsx

  • Size

    71KB

  • MD5

    e8ba0382721cd0b5e3f9b8674f1b80a4

  • SHA1

    e5466836650b44250ca3097d67cb9269b34034f0

  • SHA256

    e98f622a7d9eed1611ec02e09445aff30113b5b3d3c702d90354efd60cc6fcd4

  • SHA512

    afe0696b6e5d1bba24c5f3722112225c90ebd82f31409e8f74797efe7d8bf17f2af49dd7d0edcd604cb21c72dd4a5a87fee88fe427000de71b9ac1764e0965dc

Malware Config

Extracted

Family

xloader

Version

2.9

Campaign

rb1k

Decoy

Hy3kKk3exSb8BwggZ6MfKxQ=

NCL+/Dy1jhSUG9mRm0U=

wWOomCbzt4pHcH22F16ZDMRcKw==

WTIg8VQo+NeSJsTaLk6M9XQi

GxTnP34PxKGMqI0aDg==

BCLmUMWYgpQ0hmDGRvcILQM=

ILk0ukAA71UFWNrW

aHq3rPmIgJpVF+C9GQ==

8jYg+GYnGycf+ufa9Fo=

gQpOLax1ZUbL5at4u1SkP/XMaS0=

s1abd4QIyia5Ta6zEUSM9XQi

JDL1dr1IE+a1q4zB

24b2gBbkpvG81Nh1rLjxJw==

U5KEePzSsY5a/WYuVdUXnycmbPcnk6RB

D+TYrgrRwtaL5YIUEQ==

T1gpjLMr70QZODL8/UOM9XQi

f3Efb+StKpP+MQ==

fUfDKVLlzfcCFgo=

23rI2NitbuCL

ypQDXuCwKpP+MQ==

Signatures

  • Formbook

    Formbook is a data stealing malware which is capable of stealing data.

  • Xloader

    Xloader is a rebranded version of Formbook malware.

  • suricata: ET MALWARE FormBook CnC Checkin (GET)

    suricata: ET MALWARE FormBook CnC Checkin (GET)

  • suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

    suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

  • Xloader Payload 5 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 5 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 32 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious behavior: MapViewOfSection 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1368
    • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
      "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\TST - Statement of Accounts(S).xlsx"
      2⤵
      • Enumerates system info in registry
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious use of SetWindowsHookEx
      PID:1092
    • C:\Windows\SysWOW64\colorcpl.exe
      "C:\Windows\SysWOW64\colorcpl.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Drops file in Program Files directory
      • Modifies Internet Explorer settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1680
      • C:\Windows\SysWOW64\cmd.exe
        /c del "C:\Users\Public\vbc.exe"
        3⤵
          PID:972
        • C:\Program Files\Mozilla Firefox\Firefox.exe
          "C:\Program Files\Mozilla Firefox\Firefox.exe"
          3⤵
            PID:1468
      • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
        "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
        1⤵
        • Blocklisted process makes network request
        • Loads dropped DLL
        • Launches Equation Editor
        • Suspicious use of WriteProcessMemory
        PID:1352
        • C:\Users\Public\vbc.exe
          "C:\Users\Public\vbc.exe"
          2⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:1552
          • C:\Users\Public\vbc.exe
            "C:\Users\Public\vbc.exe"
            3⤵
            • Executes dropped EXE
            • Checks computer location settings
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of AdjustPrivilegeToken
            PID:1548

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\Users\Public\vbc.exe

              Filesize

              451KB

              MD5

              9e1bb80ff1f6f5181ed26c62ef3de29d

              SHA1

              5c37096275b5947dfd68ccacc92eec204fa73883

              SHA256

              a92f8917b2e98217ede5359f7906dd0a60df26e087a1e1c33b81797a334fb448

              SHA512

              f1493090882bbe106508b50a0dcc8ac9966b157837f3d3d428b5b1977bcda3ea00eb067b5f925add5a38e069cfb4e7ce63be49ba8db29b23eb171290226e7004

            • C:\Users\Public\vbc.exe

              Filesize

              451KB

              MD5

              9e1bb80ff1f6f5181ed26c62ef3de29d

              SHA1

              5c37096275b5947dfd68ccacc92eec204fa73883

              SHA256

              a92f8917b2e98217ede5359f7906dd0a60df26e087a1e1c33b81797a334fb448

              SHA512

              f1493090882bbe106508b50a0dcc8ac9966b157837f3d3d428b5b1977bcda3ea00eb067b5f925add5a38e069cfb4e7ce63be49ba8db29b23eb171290226e7004

            • C:\Users\Public\vbc.exe

              Filesize

              451KB

              MD5

              9e1bb80ff1f6f5181ed26c62ef3de29d

              SHA1

              5c37096275b5947dfd68ccacc92eec204fa73883

              SHA256

              a92f8917b2e98217ede5359f7906dd0a60df26e087a1e1c33b81797a334fb448

              SHA512

              f1493090882bbe106508b50a0dcc8ac9966b157837f3d3d428b5b1977bcda3ea00eb067b5f925add5a38e069cfb4e7ce63be49ba8db29b23eb171290226e7004

            • \Users\Public\vbc.exe

              Filesize

              451KB

              MD5

              9e1bb80ff1f6f5181ed26c62ef3de29d

              SHA1

              5c37096275b5947dfd68ccacc92eec204fa73883

              SHA256

              a92f8917b2e98217ede5359f7906dd0a60df26e087a1e1c33b81797a334fb448

              SHA512

              f1493090882bbe106508b50a0dcc8ac9966b157837f3d3d428b5b1977bcda3ea00eb067b5f925add5a38e069cfb4e7ce63be49ba8db29b23eb171290226e7004

            • \Users\Public\vbc.exe

              Filesize

              451KB

              MD5

              9e1bb80ff1f6f5181ed26c62ef3de29d

              SHA1

              5c37096275b5947dfd68ccacc92eec204fa73883

              SHA256

              a92f8917b2e98217ede5359f7906dd0a60df26e087a1e1c33b81797a334fb448

              SHA512

              f1493090882bbe106508b50a0dcc8ac9966b157837f3d3d428b5b1977bcda3ea00eb067b5f925add5a38e069cfb4e7ce63be49ba8db29b23eb171290226e7004

            • \Users\Public\vbc.exe

              Filesize

              451KB

              MD5

              9e1bb80ff1f6f5181ed26c62ef3de29d

              SHA1

              5c37096275b5947dfd68ccacc92eec204fa73883

              SHA256

              a92f8917b2e98217ede5359f7906dd0a60df26e087a1e1c33b81797a334fb448

              SHA512

              f1493090882bbe106508b50a0dcc8ac9966b157837f3d3d428b5b1977bcda3ea00eb067b5f925add5a38e069cfb4e7ce63be49ba8db29b23eb171290226e7004

            • \Users\Public\vbc.exe

              Filesize

              451KB

              MD5

              9e1bb80ff1f6f5181ed26c62ef3de29d

              SHA1

              5c37096275b5947dfd68ccacc92eec204fa73883

              SHA256

              a92f8917b2e98217ede5359f7906dd0a60df26e087a1e1c33b81797a334fb448

              SHA512

              f1493090882bbe106508b50a0dcc8ac9966b157837f3d3d428b5b1977bcda3ea00eb067b5f925add5a38e069cfb4e7ce63be49ba8db29b23eb171290226e7004

            • \Users\Public\vbc.exe

              Filesize

              451KB

              MD5

              9e1bb80ff1f6f5181ed26c62ef3de29d

              SHA1

              5c37096275b5947dfd68ccacc92eec204fa73883

              SHA256

              a92f8917b2e98217ede5359f7906dd0a60df26e087a1e1c33b81797a334fb448

              SHA512

              f1493090882bbe106508b50a0dcc8ac9966b157837f3d3d428b5b1977bcda3ea00eb067b5f925add5a38e069cfb4e7ce63be49ba8db29b23eb171290226e7004

            • memory/1092-96-0x000000007275D000-0x0000000072768000-memory.dmp

              Filesize

              44KB

            • memory/1092-58-0x0000000076571000-0x0000000076573000-memory.dmp

              Filesize

              8KB

            • memory/1092-57-0x000000007275D000-0x0000000072768000-memory.dmp

              Filesize

              44KB

            • memory/1092-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

              Filesize

              64KB

            • memory/1092-95-0x000000005FFF0000-0x0000000060000000-memory.dmp

              Filesize

              64KB

            • memory/1092-71-0x000000007275D000-0x0000000072768000-memory.dmp

              Filesize

              44KB

            • memory/1092-55-0x0000000071771000-0x0000000071773000-memory.dmp

              Filesize

              8KB

            • memory/1092-54-0x000000002FC51000-0x000000002FC54000-memory.dmp

              Filesize

              12KB

            • memory/1368-94-0x0000000007230000-0x000000000734E000-memory.dmp

              Filesize

              1.1MB

            • memory/1368-92-0x0000000007230000-0x000000000734E000-memory.dmp

              Filesize

              1.1MB

            • memory/1368-84-0x0000000007140000-0x000000000722C000-memory.dmp

              Filesize

              944KB

            • memory/1548-75-0x0000000000400000-0x000000000042C000-memory.dmp

              Filesize

              176KB

            • memory/1548-77-0x0000000000400000-0x000000000042C000-memory.dmp

              Filesize

              176KB

            • memory/1548-81-0x0000000000400000-0x000000000042C000-memory.dmp

              Filesize

              176KB

            • memory/1548-82-0x0000000000990000-0x0000000000C93000-memory.dmp

              Filesize

              3.0MB

            • memory/1548-83-0x00000000003A0000-0x00000000003B1000-memory.dmp

              Filesize

              68KB

            • memory/1548-74-0x0000000000400000-0x000000000042C000-memory.dmp

              Filesize

              176KB

            • memory/1552-72-0x0000000006100000-0x000000000616A000-memory.dmp

              Filesize

              424KB

            • memory/1552-73-0x0000000000A80000-0x0000000000AB2000-memory.dmp

              Filesize

              200KB

            • memory/1552-70-0x00000000003A0000-0x00000000003AE000-memory.dmp

              Filesize

              56KB

            • memory/1552-68-0x0000000001220000-0x0000000001298000-memory.dmp

              Filesize

              480KB

            • memory/1680-87-0x0000000000A50000-0x0000000000A68000-memory.dmp

              Filesize

              96KB

            • memory/1680-88-0x00000000000C0000-0x00000000000EC000-memory.dmp

              Filesize

              176KB

            • memory/1680-90-0x0000000002000000-0x0000000002303000-memory.dmp

              Filesize

              3.0MB

            • memory/1680-91-0x0000000000910000-0x00000000009A0000-memory.dmp

              Filesize

              576KB

            • memory/1680-93-0x00000000000C0000-0x00000000000EC000-memory.dmp

              Filesize

              176KB