Analysis

  • max time kernel
    127s
  • max time network
    134s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    08-05-2022 06:32

General

  • Target

    31dd6405d12d84056b2de378d8462b484488cf64459f898b4f5315d4a8cf45d8.exe

  • Size

    1.0MB

  • MD5

    1b9b2856bbcc93c30309800da2f33704

  • SHA1

    9c406c32b4758fd6df3e929aba75a64546c6708d

  • SHA256

    31dd6405d12d84056b2de378d8462b484488cf64459f898b4f5315d4a8cf45d8

  • SHA512

    d3b0463617acadf537306842ebbdd76b83ab05d06606ecffb80970f465b68738883558b82efb30fd0ab1ad00b2de05c68f182cd6ec4713111b1952e05a7687a0

Malware Config

Signatures

  • MassLogger

    Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

  • MassLogger Main Payload 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 42 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Looks up external IP address via web service 1 IoCs

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

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

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

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 27 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\31dd6405d12d84056b2de378d8462b484488cf64459f898b4f5315d4a8cf45d8.exe
    "C:\Users\Admin\AppData\Local\Temp\31dd6405d12d84056b2de378d8462b484488cf64459f898b4f5315d4a8cf45d8.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3564
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v appseure /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\appseure.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1828
      • C:\Windows\SysWOW64\reg.exe
        REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v appseure /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\appseure.exe"
        3⤵
        • Adds Run key to start application
        PID:3588
    • C:\Users\Admin\AppData\Roaming\appseure.exe
      "C:\Users\Admin\AppData\Roaming\appseure.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3032
      • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
        "C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • outlook_office_path
        • outlook_win_path
        PID:2832

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\19f93e2a-4d97-4e0c-ade5-972e41ee6cf8\f.dll
    Filesize

    94KB

    MD5

    14ff402962ad21b78ae0b4c43cd1f194

    SHA1

    f8a510eb26666e875a5bdd1cadad40602763ad72

    SHA256

    fb9646cb956945bdc503e69645f6b5316d3826b780d3c36738d6b944e884d15b

    SHA512

    daa7a08bf3709119a944bce28f6ebdd24e54a22b18cd9f86a87873e958df121a3881dcdd5e162f6b4e543238c7aef20f657c9830df01d4c79290f7c9a4fcc54b

  • C:\Users\Admin\AppData\Local\Temp\19f93e2a-4d97-4e0c-ade5-972e41ee6cf8\f.dll
    Filesize

    94KB

    MD5

    14ff402962ad21b78ae0b4c43cd1f194

    SHA1

    f8a510eb26666e875a5bdd1cadad40602763ad72

    SHA256

    fb9646cb956945bdc503e69645f6b5316d3826b780d3c36738d6b944e884d15b

    SHA512

    daa7a08bf3709119a944bce28f6ebdd24e54a22b18cd9f86a87873e958df121a3881dcdd5e162f6b4e543238c7aef20f657c9830df01d4c79290f7c9a4fcc54b

  • C:\Users\Admin\AppData\Local\Temp\19f93e2a-4d97-4e0c-ade5-972e41ee6cf8\f.dll
    Filesize

    94KB

    MD5

    14ff402962ad21b78ae0b4c43cd1f194

    SHA1

    f8a510eb26666e875a5bdd1cadad40602763ad72

    SHA256

    fb9646cb956945bdc503e69645f6b5316d3826b780d3c36738d6b944e884d15b

    SHA512

    daa7a08bf3709119a944bce28f6ebdd24e54a22b18cd9f86a87873e958df121a3881dcdd5e162f6b4e543238c7aef20f657c9830df01d4c79290f7c9a4fcc54b

  • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
    Filesize

    41KB

    MD5

    5d4073b2eb6d217c19f2b22f21bf8d57

    SHA1

    f0209900fbf08d004b886a0b3ba33ea2b0bf9da8

    SHA256

    ac1a3f21fcc88f9cee7bf51581eafba24cc76c924f0821deb2afdf1080ddf3d3

    SHA512

    9ac94880684933ba3407cdc135abc3047543436567af14cd9269c4adc5a6535db7b867d6de0d6238a21b94e69f9890dbb5739155871a624520623a7e56872159

  • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
    Filesize

    41KB

    MD5

    5d4073b2eb6d217c19f2b22f21bf8d57

    SHA1

    f0209900fbf08d004b886a0b3ba33ea2b0bf9da8

    SHA256

    ac1a3f21fcc88f9cee7bf51581eafba24cc76c924f0821deb2afdf1080ddf3d3

    SHA512

    9ac94880684933ba3407cdc135abc3047543436567af14cd9269c4adc5a6535db7b867d6de0d6238a21b94e69f9890dbb5739155871a624520623a7e56872159

  • C:\Users\Admin\AppData\Roaming\appseure.exe
    Filesize

    1.0MB

    MD5

    1b9b2856bbcc93c30309800da2f33704

    SHA1

    9c406c32b4758fd6df3e929aba75a64546c6708d

    SHA256

    31dd6405d12d84056b2de378d8462b484488cf64459f898b4f5315d4a8cf45d8

    SHA512

    d3b0463617acadf537306842ebbdd76b83ab05d06606ecffb80970f465b68738883558b82efb30fd0ab1ad00b2de05c68f182cd6ec4713111b1952e05a7687a0

  • C:\Users\Admin\AppData\Roaming\appseure.exe
    Filesize

    1.0MB

    MD5

    1b9b2856bbcc93c30309800da2f33704

    SHA1

    9c406c32b4758fd6df3e929aba75a64546c6708d

    SHA256

    31dd6405d12d84056b2de378d8462b484488cf64459f898b4f5315d4a8cf45d8

    SHA512

    d3b0463617acadf537306842ebbdd76b83ab05d06606ecffb80970f465b68738883558b82efb30fd0ab1ad00b2de05c68f182cd6ec4713111b1952e05a7687a0

  • memory/1828-136-0x0000000000000000-mapping.dmp
  • memory/2832-148-0x0000000000520000-0x00000000005A6000-memory.dmp
    Filesize

    536KB

  • memory/2832-152-0x0000000006600000-0x000000000669C000-memory.dmp
    Filesize

    624KB

  • memory/2832-151-0x00000000063A0000-0x00000000063AA000-memory.dmp
    Filesize

    40KB

  • memory/2832-150-0x0000000006510000-0x0000000006560000-memory.dmp
    Filesize

    320KB

  • memory/2832-144-0x0000000000000000-mapping.dmp
  • memory/2832-149-0x0000000005B70000-0x0000000005BD6000-memory.dmp
    Filesize

    408KB

  • memory/3032-138-0x0000000000000000-mapping.dmp
  • memory/3032-143-0x0000000073D00000-0x0000000073D89000-memory.dmp
    Filesize

    548KB

  • memory/3564-130-0x0000000000450000-0x0000000000528000-memory.dmp
    Filesize

    864KB

  • memory/3564-131-0x0000000005600000-0x0000000005BA4000-memory.dmp
    Filesize

    5.6MB

  • memory/3564-132-0x0000000004F10000-0x0000000004F54000-memory.dmp
    Filesize

    272KB

  • memory/3564-133-0x0000000005050000-0x00000000050E2000-memory.dmp
    Filesize

    584KB

  • memory/3564-135-0x0000000073D00000-0x0000000073D89000-memory.dmp
    Filesize

    548KB

  • memory/3588-137-0x0000000000000000-mapping.dmp