Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    23-07-2021 05:04

General

  • Target

    4B71D55F16C4A497FB2457C340D5A8A6.exe

  • Size

    4.2MB

  • MD5

    4b71d55f16c4a497fb2457c340d5a8a6

  • SHA1

    b8d17306aa1c757e6329bb69d976c224e585838a

  • SHA256

    4fcda5517e6673b3233c58d4738b079c6f944ce746dfc3b1dbf87f475f8ff364

  • SHA512

    93f66aca97affda90dee4631069255800ccf40a5ab912f77814f526df95ac5a8c6a1e63f74d2ba38b147b53a8f7d258f636db9cefd9a98ebb5ac869eb79ae79f

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 4 IoCs
  • Contains code to disable Windows Defender 4 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 7 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.

  • Program crash 1 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 32 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 50 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4B71D55F16C4A497FB2457C340D5A8A6.exe
    "C:\Users\Admin\AppData\Local\Temp\4B71D55F16C4A497FB2457C340D5A8A6.exe"
    1⤵
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:500
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\RarSFX0\run.vbs"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2352
      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\ATB.exe
        "C:\Users\Admin\AppData\Local\Temp\RarSFX0\ATB.exe"
        3⤵
        • Executes dropped EXE
        PID:2704
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2704 -s 868
          4⤵
          • Program crash
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4060
      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\cracked.exe
        "C:\Users\Admin\AppData\Local\Temp\RarSFX0\cracked.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3012
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
          "{path}"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2440
          • C:\Users\Admin\AppData\Local\Temp\phone.exe
            "C:\Users\Admin\AppData\Local\Temp\phone.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:2744
          • C:\Users\Admin\AppData\Local\Temp\phoneupdate.exe
            "C:\Users\Admin\AppData\Local\Temp\phoneupdate.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:2160
            • 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
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:2224
              • C:\Windows\system32\schtasks.exe
                schtasks /create /f /sc onlogon /rl highest /tn "userupdate" /tr '"C:\Users\Admin\AppData\Roaming\userupdate.exe"'
                7⤵
                • Creates scheduled task(s)
                PID:2116
            • C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe
              "C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe"
              6⤵
              • Executes dropped EXE
              PID:3280
            • C:\Users\Admin\AppData\Roaming\userupdate.exe
              "C:\Users\Admin\AppData\Roaming\userupdate.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:3348
              • 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
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:3552
                • C:\Windows\system32\schtasks.exe
                  schtasks /create /f /sc onlogon /rl highest /tn "userupdate" /tr '"C:\Users\Admin\AppData\Roaming\userupdate.exe"'
                  8⤵
                  • Creates scheduled task(s)
                  PID:3908
              • C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe
                "C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe"
                7⤵
                • Executes dropped EXE
                PID:3464
              • 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
                7⤵
                • Blocklisted process makes network request
                • Suspicious use of AdjustPrivilegeToken
                PID:1580

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\RarSFX0\ATB.exe
    MD5

    db9629508fda139f71f625d764c7eff7

    SHA1

    57b82a3239f8c8ba7423e00a05869a7e5aa72ddf

    SHA256

    656ec7ae060e52d0f80490f884121047b8741d2271d247693377275c1a32f4d3

    SHA512

    2f82d0d227c6c22afb5bf5aa76d120a6c50b0720d72e518a5cfdcf5ff3d3def51db162c63f46b37463a448fa1c42e944ec76350887cb73a0116ce1b47a270cd2

  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\ATB.exe
    MD5

    db9629508fda139f71f625d764c7eff7

    SHA1

    57b82a3239f8c8ba7423e00a05869a7e5aa72ddf

    SHA256

    656ec7ae060e52d0f80490f884121047b8741d2271d247693377275c1a32f4d3

    SHA512

    2f82d0d227c6c22afb5bf5aa76d120a6c50b0720d72e518a5cfdcf5ff3d3def51db162c63f46b37463a448fa1c42e944ec76350887cb73a0116ce1b47a270cd2

  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\cracked.exe
    MD5

    af711c6269728cc41a4b6cab99dc00d2

    SHA1

    02a1cff69f43552c5aa6fea7547e5f68018dbc84

    SHA256

    4ff431768417c7103657b6554962998af3b2f90180e6f19e66e671b4f706061c

    SHA512

    94b6ba8fcdbb5dd175096e305698a41078fb1a99725610bb49159d02ccf2484b01fd7bfcf48fb4644af6b92c77453855f7eba46445f93ff449317f25613bb8a6

  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\cracked.exe
    MD5

    af711c6269728cc41a4b6cab99dc00d2

    SHA1

    02a1cff69f43552c5aa6fea7547e5f68018dbc84

    SHA256

    4ff431768417c7103657b6554962998af3b2f90180e6f19e66e671b4f706061c

    SHA512

    94b6ba8fcdbb5dd175096e305698a41078fb1a99725610bb49159d02ccf2484b01fd7bfcf48fb4644af6b92c77453855f7eba46445f93ff449317f25613bb8a6

  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\run.vbs
    MD5

    26d980fc7fb049dc85ea91157d843af8

    SHA1

    475fda0d8d3e77760924886de22dd902ac58e99a

    SHA256

    c472d5f80188825b777d8b6818db877e862a159c51138bd6d39999c75eb7006a

    SHA512

    3ebb9a7e86d7c4cea62b43f20ad2b281f038ce32062e5c569138641da955ad0f77d9e444c2cea934ae2129499aeb1eda1a2ff1c223f77a96bd6beb21011b1c9b

  • 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/1580-208-0x0000000140000000-0x0000000140758000-memory.dmp
    Filesize

    7.3MB

  • memory/1580-205-0x0000000140000000-0x0000000140758000-memory.dmp
    Filesize

    7.3MB

  • memory/1580-206-0x00000001402EB66C-mapping.dmp
  • memory/1580-211-0x0000025B52360000-0x0000025B52380000-memory.dmp
    Filesize

    128KB

  • memory/1580-214-0x0000025B53CF0000-0x0000025B53D10000-memory.dmp
    Filesize

    128KB

  • memory/1580-207-0x0000025B52320000-0x0000025B52340000-memory.dmp
    Filesize

    128KB

  • memory/2116-180-0x0000000000000000-mapping.dmp
  • memory/2160-177-0x000000001CD90000-0x000000001CFAB000-memory.dmp
    Filesize

    2.1MB

  • memory/2160-178-0x0000000003600000-0x0000000003602000-memory.dmp
    Filesize

    8KB

  • memory/2160-170-0x0000000000D40000-0x0000000000D41000-memory.dmp
    Filesize

    4KB

  • memory/2160-167-0x0000000000000000-mapping.dmp
  • memory/2224-179-0x0000000000000000-mapping.dmp
  • memory/2352-116-0x0000000000000000-mapping.dmp
  • memory/2440-153-0x00000000095D0000-0x0000000009ACE000-memory.dmp
    Filesize

    5.0MB

  • memory/2440-152-0x0000000009870000-0x0000000009871000-memory.dmp
    Filesize

    4KB

  • memory/2440-142-0x000000000063636E-mapping.dmp
  • memory/2440-141-0x0000000000400000-0x000000000063C000-memory.dmp
    Filesize

    2.2MB

  • memory/2704-129-0x0000000000920000-0x0000000000921000-memory.dmp
    Filesize

    4KB

  • memory/2704-138-0x0000000004D50000-0x0000000004D51000-memory.dmp
    Filesize

    4KB

  • memory/2704-132-0x0000000004C70000-0x0000000004D37000-memory.dmp
    Filesize

    796KB

  • memory/2704-124-0x0000000000E50000-0x0000000000E51000-memory.dmp
    Filesize

    4KB

  • memory/2704-119-0x0000000000000000-mapping.dmp
  • memory/2744-174-0x0000026DF0353000-0x0000026DF0354000-memory.dmp
    Filesize

    4KB

  • memory/2744-175-0x0000026DF0352000-0x0000026DF0353000-memory.dmp
    Filesize

    4KB

  • memory/2744-176-0x0000026DF0355000-0x0000026DF0357000-memory.dmp
    Filesize

    8KB

  • memory/2744-173-0x0000026DF0350000-0x0000026DF0352000-memory.dmp
    Filesize

    8KB

  • memory/2744-165-0x0000026DEDEA0000-0x0000026DEDEA1000-memory.dmp
    Filesize

    4KB

  • memory/2744-158-0x0000000000000000-mapping.dmp
  • memory/3012-136-0x0000000001A50000-0x0000000001A52000-memory.dmp
    Filesize

    8KB

  • memory/3012-131-0x0000000007E90000-0x0000000007E91000-memory.dmp
    Filesize

    4KB

  • memory/3012-122-0x0000000000000000-mapping.dmp
  • memory/3012-125-0x0000000000DB0000-0x0000000000DB1000-memory.dmp
    Filesize

    4KB

  • memory/3012-128-0x00000000081F0000-0x00000000081F1000-memory.dmp
    Filesize

    4KB

  • memory/3012-130-0x0000000007DF0000-0x0000000007DF1000-memory.dmp
    Filesize

    4KB

  • memory/3012-135-0x000000000A250000-0x000000000A251000-memory.dmp
    Filesize

    4KB

  • memory/3012-137-0x0000000007CF0000-0x00000000081EE000-memory.dmp
    Filesize

    5.0MB

  • memory/3012-139-0x0000000006AA0000-0x0000000006D36000-memory.dmp
    Filesize

    2.6MB

  • memory/3012-140-0x00000000071D0000-0x0000000007414000-memory.dmp
    Filesize

    2.3MB

  • memory/3280-193-0x0000000001DF0000-0x0000000001DF2000-memory.dmp
    Filesize

    8KB

  • memory/3280-191-0x0000000001740000-0x0000000001742000-memory.dmp
    Filesize

    8KB

  • memory/3280-181-0x0000000000000000-mapping.dmp
  • memory/3280-185-0x0000000000ED0000-0x0000000000ED1000-memory.dmp
    Filesize

    4KB

  • memory/3348-197-0x000000001C2F0000-0x000000001C2F1000-memory.dmp
    Filesize

    4KB

  • memory/3348-204-0x000000001C2E0000-0x000000001C2EA000-memory.dmp
    Filesize

    40KB

  • memory/3348-194-0x000000001C380000-0x000000001C382000-memory.dmp
    Filesize

    8KB

  • memory/3348-184-0x0000000000000000-mapping.dmp
  • memory/3464-198-0x0000000000000000-mapping.dmp
  • memory/3464-213-0x000000001CA50000-0x000000001CA52000-memory.dmp
    Filesize

    8KB

  • memory/3552-195-0x0000000000000000-mapping.dmp
  • memory/3908-196-0x0000000000000000-mapping.dmp