Malware Analysis Report

2024-08-06 17:18

Sample ID 240622-y7hjxssfqh
Target WinlockerBuilderv5.exe
SHA256 51c45fb238881bd25fd7435d8b8e44eee9cc56887a56a7e5f5bdef8ec8392465
Tags
bot blacknet darkcomet guest16 persistence rat trojan upx
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

51c45fb238881bd25fd7435d8b8e44eee9cc56887a56a7e5f5bdef8ec8392465

Threat Level: Known bad

The file WinlockerBuilderv5.exe was found to be: Known bad.

Malicious Activity Summary

bot blacknet darkcomet guest16 persistence rat trojan upx

Blacknet family

Darkcomet

BlackNET

BlackNET payload

UPX packed file

Executes dropped EXE

Checks computer location settings

Adds Run key to start application

Unsigned PE

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Privilege Escalation
TA0004
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Defense Evasion
TA0005
Modify Registry
T1112
Credential Access
TA0006
Discovery
TA0007
Query Registry
T1012
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-22 20:25

Signatures

BlackNET payload

Description Indicator Process Target
N/A N/A N/A N/A

Blacknet family

blacknet

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-22 20:25

Reported

2024-06-22 20:29

Platform

win10v2004-20240611-en

Max time kernel

5s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe"

Signatures

BlackNET

trojan blacknet

BlackNET payload

Description Indicator Process Target
N/A N/A N/A N/A

Darkcomet

trojan rat darkcomet

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3169499791-3545231813-3156325206-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\svshost.exe N/A

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3169499791-3545231813-3156325206-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\a5b002eacf54590ec8401ff6d3f920ee = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WinlockerBuilderv5.exe" C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3169499791-3545231813-3156325206-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\a5b002eacf54590ec8401ff6d3f920ee = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Microsoft\\MyClient\\jusched.exe" C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3068 wrote to memory of 4788 N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe C:\Users\Admin\AppData\Local\Temp\svshost.exe
PID 3068 wrote to memory of 4788 N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe C:\Users\Admin\AppData\Local\Temp\svshost.exe
PID 3068 wrote to memory of 4788 N/A C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe C:\Users\Admin\AppData\Local\Temp\svshost.exe

Processes

C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe

"C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe"

C:\Users\Admin\AppData\Local\Temp\svshost.exe

"C:\Users\Admin\AppData\Local\Temp\svshost.exe"

C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\jusched.exe

"C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\jusched.exe"

C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe

"C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe"

C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe

"C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe"

C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe

"C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe"

C:\Users\Admin\Documents\AudioDriver\taskhost.exe

"C:\Users\Admin\Documents\AudioDriver\taskhost.exe"

C:\Users\Admin\Documents\AudioDriver\taskhost.exe

"C:\Users\Admin\Documents\AudioDriver\taskhost.exe"

C:\Users\Admin\AppData\Local\Temp\svshost.exe

"C:\Users\Admin\AppData\Local\Temp\svshost.exe"

C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe

"C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe"

C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe

"C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe"

C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe

"C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 gameservice.ddns.net udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp
US 8.8.8.8:53 f0483357.xsph.ru udp

Files

memory/3068-0-0x00007FFC3D3B5000-0x00007FFC3D3B6000-memory.dmp

memory/3068-1-0x000000001C6A0000-0x000000001C746000-memory.dmp

memory/3068-2-0x00007FFC3D100000-0x00007FFC3DAA1000-memory.dmp

memory/3068-3-0x000000001CCC0000-0x000000001D18E000-memory.dmp

memory/3068-4-0x000000001D230000-0x000000001D2CC000-memory.dmp

memory/3068-5-0x00007FFC3D100000-0x00007FFC3DAA1000-memory.dmp

memory/3068-6-0x0000000001D20000-0x0000000001D28000-memory.dmp

memory/3068-7-0x000000001D300000-0x000000001D34C000-memory.dmp

memory/3068-8-0x00007FFC3D100000-0x00007FFC3DAA1000-memory.dmp

memory/3068-9-0x00007FFC3D100000-0x00007FFC3DAA1000-memory.dmp

memory/3068-10-0x00007FFC3D100000-0x00007FFC3DAA1000-memory.dmp

memory/3068-11-0x000000001E850000-0x000000001E8B2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\svshost.exe

MD5 2df0daacf8be5126ddbaa7ba9a83be58
SHA1 0889fcd78f5bf71ca04280fe97b7507b6b114ba3
SHA256 0936e508e142466b6d83e49b27513be2207822f91ac2d038023a86d6ccd29b2a
SHA512 0348f7511803198d5d81b10bac08b9e9e79bfd1d193c9a72b1bf3883bd49d18ec21a998e4a056206fac539c73843b31c10437838eb38746bd062e682f2df120e

C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\jusched.exe

MD5 5891817266ffedc10d4a84a3bd483239
SHA1 b59d365a91b50ec55ccc1c1b2a70cbf858382aa3
SHA256 51c45fb238881bd25fd7435d8b8e44eee9cc56887a56a7e5f5bdef8ec8392465
SHA512 517c5d785f069ce566c1d89fcc998968a5cdfc6d85bcc7e42cc2e720b4be9b543065cc1c7967635948595fdbb4af3fc7714c8b90aa6035953bca40cba7272c23

memory/1084-35-0x00007FFC3D100000-0x00007FFC3DAA1000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe

MD5 0d833c6509f350e0a15492597df2bda6
SHA1 1f77b7eb4410f6e1c0e0f7b971a3c98b3f0a5f9f
SHA256 d280fdf95c57cba365c15fc9c6371ada79734480812497c2244246cfdac52ca7
SHA512 9e7ec8f4a756a2546c64850e0ca390788b9817984c1a91af55ffddfd3a010d7629478c2665c03a8a15d46377d66223f6937ac9d8d3d6bda5f9a1ee549ef16118

memory/4088-55-0x0000000000400000-0x00000000004B2000-memory.dmp

memory/1152-56-0x0000000000400000-0x000000000052A000-memory.dmp

memory/4088-53-0x0000000000400000-0x00000000004B2000-memory.dmp

memory/3068-52-0x00007FFC3D100000-0x00007FFC3DAA1000-memory.dmp

memory/988-138-0x0000000000400000-0x000000000052A000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0\UsageLogs\WinlockerBuilderv5.exe.log

MD5 d7d09fe4ff702ba9f25d5f48923708b6
SHA1 85ce2b7a1c9a4c3252fc9f471cf13ad50ad2cf65
SHA256 ae5b9b53869ba7b6bf99b07cb09c9ce9ff11d4abbbb626570390f9fba4f6f462
SHA512 500a313cc36a23302763d6957516640c981da2fbab691c8b66518f5b0051e25dfb1b09449efff526eab707fa1be36ef9362286869c82b3800e42d2d8287ef1cf

memory/2588-141-0x0000000000400000-0x00000000004B2000-memory.dmp

memory/2588-140-0x0000000000400000-0x00000000004B2000-memory.dmp

memory/4088-142-0x0000000000400000-0x00000000004B2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe

MD5 0df533cb9a581de63e3522954a681603
SHA1 be46afa245289e0d9a84bd1fd1faea8d8c96da5e
SHA256 e3570b276e526f6fb6a289da32583b36cfbd98ec2f59d09c0243fbd0fc0805a3
SHA512 c973e3a8476879dad79f8b37f476d379b90f27cf64ecd359256df94fb811d69226dc50d1e8168d34787cc2d6abf407d8097e37cd60155650dad007a68263661e

memory/4940-171-0x0000000000400000-0x0000000000C89000-memory.dmp

memory/1624-178-0x0000000000400000-0x000000000052A000-memory.dmp

memory/1820-180-0x0000000000400000-0x00000000004B2000-memory.dmp

memory/2588-182-0x0000000000400000-0x00000000004B2000-memory.dmp

memory/4940-183-0x0000000000400000-0x0000000000C89000-memory.dmp

memory/2588-184-0x0000000000400000-0x00000000004B2000-memory.dmp

memory/4940-186-0x0000000000400000-0x0000000000C89000-memory.dmp

memory/2588-187-0x0000000000400000-0x00000000004B2000-memory.dmp

memory/4940-188-0x0000000000400000-0x0000000000C89000-memory.dmp

memory/2588-189-0x0000000000400000-0x00000000004B2000-memory.dmp

memory/1084-193-0x00007FFC3D100000-0x00007FFC3DAA1000-memory.dmp

memory/2588-194-0x0000000000400000-0x00000000004B2000-memory.dmp

memory/2588-196-0x0000000000400000-0x00000000004B2000-memory.dmp

memory/2588-198-0x0000000000400000-0x00000000004B2000-memory.dmp

memory/2588-200-0x0000000000400000-0x00000000004B2000-memory.dmp

memory/2588-202-0x0000000000400000-0x00000000004B2000-memory.dmp

memory/2588-206-0x0000000000400000-0x00000000004B2000-memory.dmp

memory/2588-208-0x0000000000400000-0x00000000004B2000-memory.dmp