Analysis

  • max time kernel
    120s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15-04-2023 15:41

General

  • Target

    9a75a6d3afd26306f563d96dc2517225.exe

  • Size

    585KB

  • MD5

    9a75a6d3afd26306f563d96dc2517225

  • SHA1

    fadb011bcecdd3919242b4019d0746772ac48ce6

  • SHA256

    574afcec719331221014fefc45e623e57ff81468b21fcbc186fa7f448be48a40

  • SHA512

    3ee3787329425f3e71b507d58b84797df54f82e535e23b146a3185e892c93628daec0e9fe6fd3d64bef50ec4e1f378e93c45fd38ae3e11aafd6c4f8bfff56782

  • SSDEEP

    1536:6aRU9m4HYvSIX0u+7+j71iMs5gU5OuTcjCNON9PApdpihLNafpo:kOhX0N7+f1iV5bcj0wWduLIho

Malware Config

Extracted

Family

cryptbot

C2

http://bluejackover.com/gate.php

Signatures

  • CryptBot

    A C++ stealer distributed widely in bundle with other software.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 2 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
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 3 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9a75a6d3afd26306f563d96dc2517225.exe
    "C:\Users\Admin\AppData\Local\Temp\9a75a6d3afd26306f563d96dc2517225.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:3800
    • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\putdemovl.exe
      C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\putdemovl.exe
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4956
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMwA1AA==
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:852
      • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\putdemovl.exe
        C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\putdemovl.exe
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Maps connected drives based on registry
        • Checks processor information in registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:4496
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c timeout -t 5 && del "C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\putdemovl.exe"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2112
          • C:\Windows\SysWOW64\timeout.exe
            timeout -t 5
            5⤵
            • Delays execution with timeout.exe
            PID:2300

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\DC6C.tmp

    Filesize

    32B

    MD5

    6bb6e374b5dbd021622648b4d4e9afc7

    SHA1

    df356bb84780e332c960769d552f67d1f5221cce

    SHA256

    6546a2ec37419190b5f256f2c09efd90f8dd11fe98e5ae4521f8e07ecd64a2aa

    SHA512

    42b05356304dbbf2dd1ba7c7bc8dd2fcfc908d80fcd7c25771a3722ac946fd04575591d530e802799f8c17d9622db361f76b69c3985fd1ee63fce38777938644

  • C:\Users\Admin\AppData\Local\Temp\E5D6.tmp

    Filesize

    71KB

    MD5

    92d24961d2ebaacf1ace5463dfc9930d

    SHA1

    99ffaf6904ab616c33a37ce01d383e4a493df335

    SHA256

    9013688dec264c615178e151c2eb5f0b2eb9fe8cfad867b311d8581d921c73f3

    SHA512

    77598c77f219ab5234b8b84bcfe873f40e7464b224fac3c8568b300d3f2563f7ef5ad9ec5cccc0d719e7d3e489a164b04b6b36316196afea0b8051de3c751cc7

  • C:\Users\Admin\AppData\Local\Temp\FEE8.tmp

    Filesize

    2KB

    MD5

    dce9b749d38fdc247ab517e8a76e6102

    SHA1

    d6c5b6548e1a3da3326bd097c50c49fc7906be3f

    SHA256

    5087b8c7f2cecceac61d7bd02b939888cf2cc5a452676f28fd5c076eb1ae7ea7

    SHA512

    56c276f0a070da656c98520aa720994d78f1bf0bbb085a5f6fb4fd18fed2bbba1eb8e97b54d58eaa9a978d21d64678170f49c020feb19d8545d158a2d8d58446

  • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\putdemovl.exe

    Filesize

    351.0MB

    MD5

    a0255d2458d8a8089b444120e94c0057

    SHA1

    78a82cb307b5b9e82e26a36f6bba3d79464746fc

    SHA256

    234c8b8c391d17d2bb64f12db5ac50b2bfaf81e57f1b233daeb3f0e4429ababa

    SHA512

    40ae6484c161535c21a87e05d94e04ead1fc4054256051f092654bdfaddc25c58a612da8c23ecc959ecbc31d450cad4500da12d23be2c203de6e28ad157051f7

  • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\putdemovl.exe

    Filesize

    351.0MB

    MD5

    a0255d2458d8a8089b444120e94c0057

    SHA1

    78a82cb307b5b9e82e26a36f6bba3d79464746fc

    SHA256

    234c8b8c391d17d2bb64f12db5ac50b2bfaf81e57f1b233daeb3f0e4429ababa

    SHA512

    40ae6484c161535c21a87e05d94e04ead1fc4054256051f092654bdfaddc25c58a612da8c23ecc959ecbc31d450cad4500da12d23be2c203de6e28ad157051f7

  • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\putdemovl.exe

    Filesize

    351.0MB

    MD5

    a0255d2458d8a8089b444120e94c0057

    SHA1

    78a82cb307b5b9e82e26a36f6bba3d79464746fc

    SHA256

    234c8b8c391d17d2bb64f12db5ac50b2bfaf81e57f1b233daeb3f0e4429ababa

    SHA512

    40ae6484c161535c21a87e05d94e04ead1fc4054256051f092654bdfaddc25c58a612da8c23ecc959ecbc31d450cad4500da12d23be2c203de6e28ad157051f7

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jr1cut5x.ham.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/852-158-0x0000000003440000-0x0000000003450000-memory.dmp

    Filesize

    64KB

  • memory/852-162-0x0000000003440000-0x0000000003450000-memory.dmp

    Filesize

    64KB

  • memory/852-143-0x0000000003440000-0x0000000003450000-memory.dmp

    Filesize

    64KB

  • memory/852-146-0x0000000005970000-0x00000000059D6000-memory.dmp

    Filesize

    408KB

  • memory/852-147-0x00000000059E0000-0x0000000005A46000-memory.dmp

    Filesize

    408KB

  • memory/852-144-0x0000000005CA0000-0x00000000062C8000-memory.dmp

    Filesize

    6.2MB

  • memory/852-157-0x0000000006910000-0x000000000692E000-memory.dmp

    Filesize

    120KB

  • memory/852-142-0x0000000002F50000-0x0000000002F86000-memory.dmp

    Filesize

    216KB

  • memory/852-159-0x0000000008140000-0x00000000087BA000-memory.dmp

    Filesize

    6.5MB

  • memory/852-160-0x0000000006E00000-0x0000000006E1A000-memory.dmp

    Filesize

    104KB

  • memory/852-161-0x0000000003440000-0x0000000003450000-memory.dmp

    Filesize

    64KB

  • memory/852-145-0x0000000003440000-0x0000000003450000-memory.dmp

    Filesize

    64KB

  • memory/852-163-0x0000000003440000-0x0000000003450000-memory.dmp

    Filesize

    64KB

  • memory/4496-167-0x0000000000400000-0x00000000004BC000-memory.dmp

    Filesize

    752KB

  • memory/4496-170-0x0000000000400000-0x00000000004BC000-memory.dmp

    Filesize

    752KB

  • memory/4496-171-0x0000000000400000-0x00000000004BC000-memory.dmp

    Filesize

    752KB

  • memory/4496-172-0x0000000000400000-0x00000000004BC000-memory.dmp

    Filesize

    752KB

  • memory/4496-219-0x0000000000400000-0x00000000004BC000-memory.dmp

    Filesize

    752KB

  • memory/4496-276-0x0000000000400000-0x00000000004BC000-memory.dmp

    Filesize

    752KB

  • memory/4956-141-0x0000000005540000-0x0000000005550000-memory.dmp

    Filesize

    64KB

  • memory/4956-140-0x0000000006630000-0x0000000006652000-memory.dmp

    Filesize

    136KB

  • memory/4956-139-0x0000000005540000-0x0000000005550000-memory.dmp

    Filesize

    64KB

  • memory/4956-138-0x0000000000BF0000-0x0000000000C04000-memory.dmp

    Filesize

    80KB