Analysis

  • max time kernel
    28s
  • max time network
    131s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    01-02-2023 15:08

General

  • Target

    file.exe

  • Size

    4.9MB

  • MD5

    80db0830528a254d1b205009122ad06a

  • SHA1

    91e33ac6fd47a806b15de1241eb60ded883bd6e4

  • SHA256

    e305ceb9129c9f131269561ddbdb58d72ffad8479ffa3c41b3a4e477d7cb5168

  • SHA512

    c97b1512949b8fcf2c533b96e053d36fc9d9ea41a989b17320d4e16cdae13c17af84ed477bb2b0cb35cde1b35409bb5a932025256c6ca2e3e2e18917153ba8f0

  • SSDEEP

    98304:C0maPaNRkAbtWF5UOhFSV0MCHvPh+Y5C7dGPD2stX1/EUSuMbf+IQ:C0m9jY55hFSVqHXhjmzsFCU9M7q

Malware Config

Signatures

  • PrivateLoader

    PrivateLoader is a downloader sold as a pay-per-install malware distribution service.

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Loads dropped DLL 10 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Checks installed software on the system 1 TTPs

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

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • 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 1 IoCs
  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Loads dropped DLL
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1508
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1508 -s 1100
      2⤵
      • Program crash
      PID:368

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

3
T1082

Collection

Data from Local System

2
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • \Users\Admin\AppData\Local\Temp\LocalSimbaOTPg9t5GzjU\freebl3.dll
    Filesize

    326KB

    MD5

    ef2834ac4ee7d6724f255beaf527e635

    SHA1

    5be8c1e73a21b49f353c2ecfa4108e43a883cb7b

    SHA256

    a770ecba3b08bbabd0a567fc978e50615f8b346709f8eb3cfacf3faab24090ba

    SHA512

    c6ea0e4347cbd7ef5e80ae8c0afdca20ea23ac2bdd963361dfaf562a9aed58dcbc43f89dd826692a064d76c3f4b3e92361af7b79a6d16a75d9951591ae3544d2

  • \Users\Admin\AppData\Local\Temp\LocalSimbaOTPg9t5GzjU\freebl3.dll
    Filesize

    326KB

    MD5

    ef2834ac4ee7d6724f255beaf527e635

    SHA1

    5be8c1e73a21b49f353c2ecfa4108e43a883cb7b

    SHA256

    a770ecba3b08bbabd0a567fc978e50615f8b346709f8eb3cfacf3faab24090ba

    SHA512

    c6ea0e4347cbd7ef5e80ae8c0afdca20ea23ac2bdd963361dfaf562a9aed58dcbc43f89dd826692a064d76c3f4b3e92361af7b79a6d16a75d9951591ae3544d2

  • \Users\Admin\AppData\Local\Temp\LocalSimbaOTPg9t5GzjU\freebl3.dll
    Filesize

    326KB

    MD5

    ef2834ac4ee7d6724f255beaf527e635

    SHA1

    5be8c1e73a21b49f353c2ecfa4108e43a883cb7b

    SHA256

    a770ecba3b08bbabd0a567fc978e50615f8b346709f8eb3cfacf3faab24090ba

    SHA512

    c6ea0e4347cbd7ef5e80ae8c0afdca20ea23ac2bdd963361dfaf562a9aed58dcbc43f89dd826692a064d76c3f4b3e92361af7b79a6d16a75d9951591ae3544d2

  • \Users\Admin\AppData\Local\Temp\LocalSimbaOTPg9t5GzjU\freebl3.dll
    Filesize

    326KB

    MD5

    ef2834ac4ee7d6724f255beaf527e635

    SHA1

    5be8c1e73a21b49f353c2ecfa4108e43a883cb7b

    SHA256

    a770ecba3b08bbabd0a567fc978e50615f8b346709f8eb3cfacf3faab24090ba

    SHA512

    c6ea0e4347cbd7ef5e80ae8c0afdca20ea23ac2bdd963361dfaf562a9aed58dcbc43f89dd826692a064d76c3f4b3e92361af7b79a6d16a75d9951591ae3544d2

  • \Users\Admin\AppData\Local\Temp\LocalSimbaOTPg9t5GzjU\freebl3.dll
    Filesize

    326KB

    MD5

    ef2834ac4ee7d6724f255beaf527e635

    SHA1

    5be8c1e73a21b49f353c2ecfa4108e43a883cb7b

    SHA256

    a770ecba3b08bbabd0a567fc978e50615f8b346709f8eb3cfacf3faab24090ba

    SHA512

    c6ea0e4347cbd7ef5e80ae8c0afdca20ea23ac2bdd963361dfaf562a9aed58dcbc43f89dd826692a064d76c3f4b3e92361af7b79a6d16a75d9951591ae3544d2

  • \Users\Admin\AppData\Local\Temp\LocalSimbaOTPg9t5GzjU\freebl3.dll
    Filesize

    326KB

    MD5

    ef2834ac4ee7d6724f255beaf527e635

    SHA1

    5be8c1e73a21b49f353c2ecfa4108e43a883cb7b

    SHA256

    a770ecba3b08bbabd0a567fc978e50615f8b346709f8eb3cfacf3faab24090ba

    SHA512

    c6ea0e4347cbd7ef5e80ae8c0afdca20ea23ac2bdd963361dfaf562a9aed58dcbc43f89dd826692a064d76c3f4b3e92361af7b79a6d16a75d9951591ae3544d2

  • \Users\Admin\AppData\Local\Temp\LocalSimbaOTPg9t5GzjU\mozglue.dll
    Filesize

    133KB

    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \Users\Admin\AppData\Local\Temp\LocalSimbaOTPg9t5GzjU\nss3.dll
    Filesize

    1.2MB

    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • \Users\Admin\AppData\Local\Temp\LocalSimbaOTPg9t5GzjU\softokn3.dll
    Filesize

    141KB

    MD5

    a2ee53de9167bf0d6c019303b7ca84e5

    SHA1

    2a3c737fa1157e8483815e98b666408a18c0db42

    SHA256

    43536adef2ddcc811c28d35fa6ce3031029a2424ad393989db36169ff2995083

    SHA512

    45b56432244f86321fa88fbcca6a0d2a2f7f4e0648c1d7d7b1866adc9daa5eddd9f6bb73662149f279c9ab60930dad1113c8337cb5e6ec9eed5048322f65f7d8

  • \Users\Admin\AppData\Local\Temp\LocalSimbaOTPg9t5GzjU\softokn3.dll
    Filesize

    141KB

    MD5

    a2ee53de9167bf0d6c019303b7ca84e5

    SHA1

    2a3c737fa1157e8483815e98b666408a18c0db42

    SHA256

    43536adef2ddcc811c28d35fa6ce3031029a2424ad393989db36169ff2995083

    SHA512

    45b56432244f86321fa88fbcca6a0d2a2f7f4e0648c1d7d7b1866adc9daa5eddd9f6bb73662149f279c9ab60930dad1113c8337cb5e6ec9eed5048322f65f7d8

  • memory/368-75-0x0000000000000000-mapping.dmp
  • memory/1508-62-0x0000000000400000-0x0000000000E5C000-memory.dmp
    Filesize

    10.4MB

  • memory/1508-63-0x0000000000400000-0x0000000000E5C000-memory.dmp
    Filesize

    10.4MB

  • memory/1508-61-0x0000000077200000-0x0000000077380000-memory.dmp
    Filesize

    1.5MB

  • memory/1508-54-0x00000000757E1000-0x00000000757E3000-memory.dmp
    Filesize

    8KB

  • memory/1508-60-0x0000000000400000-0x0000000000E5C000-memory.dmp
    Filesize

    10.4MB

  • memory/1508-58-0x0000000000400000-0x0000000000E5C000-memory.dmp
    Filesize

    10.4MB

  • memory/1508-57-0x0000000000400000-0x0000000000E5C000-memory.dmp
    Filesize

    10.4MB

  • memory/1508-56-0x0000000000400000-0x0000000000E5C000-memory.dmp
    Filesize

    10.4MB

  • memory/1508-55-0x0000000000400000-0x0000000000E5C000-memory.dmp
    Filesize

    10.4MB

  • memory/1508-64-0x0000000000400000-0x0000000000E5C000-memory.dmp
    Filesize

    10.4MB

  • memory/1508-76-0x0000000000400000-0x0000000000E5C000-memory.dmp
    Filesize

    10.4MB

  • memory/1508-77-0x0000000077200000-0x0000000077380000-memory.dmp
    Filesize

    1.5MB