blacknet | 90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320

General

Target

90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe
Size

228KB
MD5

e12000b9b526a5caff5b13d2cb2d07d0
SHA1

7f9227195996aac1d27b38d5b95a837e8c2b43c2
SHA256

90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320
SHA512

a506b0e76e72cf2e4f92e60c12ac4cee7aedcca37e3aa6c71eb3150438363122e4e880608cfde334c51de4aaf9e5677d5a7b353f1fb3ef49741ef9a3467a2643

Score

10^/10

blacknet microwave coreentity evasion rezer0 trojan

Malware Config

Extracted

Family

blacknet

Version

v3.5 Public

Botnet

Microwave

C2

http://thehacker.club/update

Mutex

BN[GBefMSlt-8433340]

Attributes

antivm
false
elevate_uac
false
install_name
WindowsUpdate.exe
splitter
|BN|
start_name
14247ae8e9bdf8a07859c46cc6c701e5
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
behavioral1/memory/592-7-0x0000000000400000-0x000000000041A000-memory.dmp	family_blacknet
behavioral1/memory/592-9-0x0000000000400000-0x000000000041A000-memory.dmp	family_blacknet
behavioral1/memory/592-8-0x0000000000412A4E-mapping.dmp	family_blacknet
behavioral1/memory/592-10-0x0000000000400000-0x000000000041A000-memory.dmp	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
behavioral1/memory/592-7-0x0000000000400000-0x000000000041A000-memory.dmp	disable_win_def
behavioral1/memory/592-9-0x0000000000400000-0x000000000041A000-memory.dmp	disable_win_def
behavioral1/memory/592-8-0x0000000000412A4E-mapping.dmp	disable_win_def
behavioral1/memory/592-10-0x0000000000400000-0x000000000041A000-memory.dmp	disable_win_def

CoreEntity .NET Packer 1 IoCs

A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

coreentity

resource	yara_rule
behavioral1/memory/756-3-0x00000000004D0000-0x00000000004D2000-memory.dmp	coreentity

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

resource	yara_rule
behavioral1/memory/756-4-0x00000000004E0000-0x00000000004FC000-memory.dmp	rezer0

Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 756 set thread context of 592	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	32

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
1500	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe
592	RegSvcs.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe
Token: SeDebugPrivilege	592	RegSvcs.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
592	RegSvcs.exe
592	RegSvcs.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 756 wrote to memory of 1500	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	30
PID 756 wrote to memory of 1500	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	30
PID 756 wrote to memory of 1500	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	30
PID 756 wrote to memory of 1500	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	30
PID 756 wrote to memory of 592	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	32
PID 756 wrote to memory of 592	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	32
PID 756 wrote to memory of 592	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	32
PID 756 wrote to memory of 592	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	32
PID 756 wrote to memory of 592	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	32
PID 756 wrote to memory of 592	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	32
PID 756 wrote to memory of 592	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	32
PID 756 wrote to memory of 592	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	32
PID 756 wrote to memory of 592	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	32
PID 756 wrote to memory of 592	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	32
PID 756 wrote to memory of 592	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	32
PID 756 wrote to memory of 592	756	90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe	32

C:\Users\Admin\AppData\Local\Temp\90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe
"C:\Users\Admin\AppData\Local\Temp\90071cffdfe6465b764829a706fe27f1abbb58d719bfcb428b210ae8c939a320.exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:756
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\SneHmbYnNye" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBFE5.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1500
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "{path}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:592

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/592-7-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/592-9-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/592-10-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/592-11-0x00000000748C0000-0x0000000074FAE000-memory.dmp

Filesize
6.9MB

Download
memory/756-0-0x00000000748C0000-0x0000000074FAE000-memory.dmp

Filesize
6.9MB

Download
memory/756-1-0x00000000010A0000-0x00000000010A1000-memory.dmp

Filesize
4KB

Download
memory/756-3-0x00000000004D0000-0x00000000004D2000-memory.dmp

Filesize
8KB

Download
memory/756-4-0x00000000004E0000-0x00000000004FC000-memory.dmp

Filesize
112KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads