Analysis

  • max time kernel
    115s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    20-02-2024 18:06

General

  • Target

    fly vw.exe

  • Size

    3.0MB

  • MD5

    e9741cbf19fc1947d6c586564585f53f

  • SHA1

    6580de244f3f2f77548376aabf1671a2b76e0b4e

  • SHA256

    72ec0572620cb474a46ee2a6092f3d080c25b66b07d76fd2dd72d3f2388f04a0

  • SHA512

    4560eb4fb3706967e24a0cbcf34387564ab1b0e340a910ed7b925ec5dc80661c7b39a46650586c3991badfd343f3ad3cf67506f5afda4af859784629988b047a

  • SSDEEP

    49152:tM3r1CyUBpXb9OZxkjBJrlrCZ9eZHtFs6SC5bAPLERCpydSECwKWvtY0:qJC1pb9OZ+9dlKwZHtFg8czE0pydSECW

Malware Config

Extracted

Family

44caliber

C2

https://discordapp.com/api/webhooks/1192569430484463717/I6Kwe8DzntI6vhtlBS66UU8vV05EYfDX3mK1x5PPRmeEfRH9iurdtdMxHmv2ZZuW3Ev5

Signatures

  • 44Caliber

    An open source infostealer written in C#.

  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 32 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fly vw.exe
    "C:\Users\Admin\AppData\Local\Temp\fly vw.exe"
    1⤵
    • Modifies Internet Explorer settings
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2936
    • C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Roaming\Setup.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2748
      • C:\Users\Admin\AppData\Roaming\FreeRobux.exe
        FreeRobux.exe -p111 -dC:\Users\Admin\AppData\Roaming
        3⤵
        • Executes dropped EXE
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Checks processor information in registry
        • Suspicious behavior: CmdExeWriteProcessMemorySpam
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:2588
  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe"
    1⤵
    • Enumerates system info in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:2792
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=106.0.5249.119 --initial-client-data=0xc0,0xc4,0xc8,0x94,0xcc,0x7fef63c9758,0x7fef63c9768,0x7fef63c9778
      2⤵
        PID:1176
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1100 --field-trial-handle=1308,i,1825909939938514391,6954039230042745107,131072 /prefetch:2
        2⤵
          PID:1944
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=1504 --field-trial-handle=1308,i,1825909939938514391,6954039230042745107,131072 /prefetch:8
          2⤵
            PID:1544
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1608 --field-trial-handle=1308,i,1825909939938514391,6954039230042745107,131072 /prefetch:8
            2⤵
              PID:2088
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=2248 --field-trial-handle=1308,i,1825909939938514391,6954039230042745107,131072 /prefetch:1
              2⤵
                PID:2484
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=2256 --field-trial-handle=1308,i,1825909939938514391,6954039230042745107,131072 /prefetch:1
                2⤵
                  PID:1924
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --use-gl=angle --use-angle=swiftshader-webgl --mojo-platform-channel-handle=1340 --field-trial-handle=1308,i,1825909939938514391,6954039230042745107,131072 /prefetch:2
                  2⤵
                    PID:1600
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --mojo-platform-channel-handle=3192 --field-trial-handle=1308,i,1825909939938514391,6954039230042745107,131072 /prefetch:1
                    2⤵
                      PID:2832
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3660 --field-trial-handle=1308,i,1825909939938514391,6954039230042745107,131072 /prefetch:8
                      2⤵
                        PID:2576
                    • C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe
                      "C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe"
                      1⤵
                        PID:1360

                      Network

                      MITRE ATT&CK Enterprise v15

                      Replay Monitor

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                      Downloads

                      • C:\ProgramData\44\Browsers\Firefox\Bookmarks.txt

                        Filesize

                        105B

                        MD5

                        2e9d094dda5cdc3ce6519f75943a4ff4

                        SHA1

                        5d989b4ac8b699781681fe75ed9ef98191a5096c

                        SHA256

                        c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

                        SHA512

                        d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

                      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GPUCache\data_1

                        Filesize

                        264KB

                        MD5

                        f50f89a0a91564d0b8a211f8921aa7de

                        SHA1

                        112403a17dd69d5b9018b8cede023cb3b54eab7d

                        SHA256

                        b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec

                        SHA512

                        bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58

                      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences

                        Filesize

                        4KB

                        MD5

                        9d59baf780bbc579b6788c0198a078f7

                        SHA1

                        ff46d594e4b9e68342e400e87a37ab78ea21af64

                        SHA256

                        0f1e463289d303970bfb02872cbbb139b2e8fa71851d7c4da5e4e3022358a6d9

                        SHA512

                        ed164518716ba3d3c6d39494bad89ddee55d03c6e1473fd861fb01a40adee9e559fd2b3fb1db389dd7e63efac2cc723d3cf487c2e30421c8313f5d01443ec21c

                      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences

                        Filesize

                        4KB

                        MD5

                        8aaae9db985f186f8f1be48dfd7ff32b

                        SHA1

                        c28599646814b2be06054a2621e7603f6390d8d4

                        SHA256

                        a71b4687236dbc452684448bb0bb2a13d233fdb9aee71d09b906bd3195107563

                        SHA512

                        9c8d799de5a8bdbfe7568829fd1ab08b485382e0ce61a90402d3e8a91bf6c40c0abc830e5a927dc7134b9b5dffe856fc43c8edc8d304bc06d53c6bbdf8dd191a

                      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Site Characteristics Database\000007.dbtmp

                        Filesize

                        16B

                        MD5

                        18e723571b00fb1694a3bad6c78e4054

                        SHA1

                        afcc0ef32d46fe59e0483f9a3c891d3034d12f32

                        SHA256

                        8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa

                        SHA512

                        43bb0af7d3984012d2d67ca6b71f0201e5b948e6fe26a899641c4c6f066c59906d468ddf7f1df5ea5fa33c2bc5ea8219c0f2c82e0a5c365ad7581b898a8859e2

                      • C:\Users\Admin\AppData\Roaming\FreeRobux.exe

                        Filesize

                        1.2MB

                        MD5

                        3c0a10912d34140b0dcbbb6ddd982f56

                        SHA1

                        9c07774e8ce009629dbddb43fa73cb3f5dafe39b

                        SHA256

                        d3e166dfd64f0f5e63ef46ccf340937393242433a872d77d8d6afc974a8e6cfd

                        SHA512

                        c95140ef1abe995c210a620727db4e0627f2fda20d248a29c9216e96992f23096435ee248f3d2d69b71e4e9c4215e7ecf6048cc983142f67b371d7c35b15bb4b

                      • C:\Users\Admin\AppData\Roaming\FreeRobux.exe

                        Filesize

                        1.1MB

                        MD5

                        7255aa1ce978c7c031246ab25ec8bd22

                        SHA1

                        a34c4c7507b413d5d2231aea00cb7e049099fc02

                        SHA256

                        30a26205dd9d7f7ebc353a3936057d65fba6e67d67b678a4d0567faa62777887

                        SHA512

                        d4233b50f3c92642d3f71ea5cc92c128e29673e30895fe685484c85a714a725333bf955cf3055247c6004c4609fd9a1694a4dd712a3101d0a9a80c846a8de76b

                      • C:\Users\Admin\AppData\Roaming\Setup.bat

                        Filesize

                        31B

                        MD5

                        7a1224f5b93470ba772698dba9bbc8dc

                        SHA1

                        5cbabe8cb347a350f75108efb101f7aa29f1ac6f

                        SHA256

                        5ea7797532c3ed291e4a9b5f40f07140ac073737bc280de5bc5fc1bf7dc90e99

                        SHA512

                        f6071c4edb7e7cc013cc8791c96b048672ca7eb71b0098ce5fa565309d8f9767e470b35b9172bfbaa6d42f91cb7792789828195c4f041e81066cbd8b45f61c05

                      • memory/2588-35-0x0000000005820000-0x0000000005860000-memory.dmp

                        Filesize

                        256KB

                      • memory/2588-89-0x00000000749C0000-0x00000000750AE000-memory.dmp

                        Filesize

                        6.9MB

                      • memory/2588-88-0x0000000000340000-0x00000000006EE000-memory.dmp

                        Filesize

                        3.7MB

                      • memory/2588-34-0x00000000749C0000-0x00000000750AE000-memory.dmp

                        Filesize

                        6.9MB

                      • memory/2588-33-0x0000000000340000-0x00000000006EE000-memory.dmp

                        Filesize

                        3.7MB

                      • memory/2588-32-0x0000000000340000-0x00000000006EE000-memory.dmp

                        Filesize

                        3.7MB