blacknet | 51c45fb238881bd25fd7435d8b8e44eee9cc56887a56a7e5f5bdef8ec8392465

Analysis

max time kernel
5s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
03/03/2025, 12:55

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General

Target

Winlocker.exe
Size

11.0MB
MD5

5891817266ffedc10d4a84a3bd483239
SHA1

b59d365a91b50ec55ccc1c1b2a70cbf858382aa3
SHA256

51c45fb238881bd25fd7435d8b8e44eee9cc56887a56a7e5f5bdef8ec8392465
SHA512

517c5d785f069ce566c1d89fcc998968a5cdfc6d85bcc7e42cc2e720b4be9b543065cc1c7967635948595fdbb4af3fc7714c8b90aa6035953bca40cba7272c23
SSDEEP

49152:VEdISABBHJtTPSfon8ElC8exQ5ekWtoy/WnwTua+V1ISCezf/rs6kLrHKOWHWq6r:VEd9

Score

10^/10

blacknet darkcomet guest16 discovery persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

gameservice.ddns.net:4320

Mutex

DC_MUTEX-WBUNVXD

Attributes

InstallPath
AudioDriver\taskhost.exe
gencode
EWSsWwgyJrUD
install
true
offline_keylogger
true
persistence
false
reg_key
AudioDriver

rc4.plain

Signatures

BlackNET
BlackNET is an open source remote access tool written in VB.NET.
trojan blacknet

BlackNET payload 1 IoCs

resource	yara_rule
behavioral1/files/0x000200000001e715-21.dat	family_blacknet

Blacknet family
blacknet
Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet
Darkcomet family
darkcomet

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-22591836-1183090055-1220658180-1000\Control Panel\International\Geo\Nation	Winlocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-22591836-1183090055-1220658180-1000\Control Panel\International\Geo\Nation	svshost.exe

Executes dropped EXE 2 IoCs

pid	Process
4164	svshost.exe
1436	jusched.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-22591836-1183090055-1220658180-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\a5b002eacf54590ec8401ff6d3f920ee = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Winlocker.exe"	Winlocker.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-22591836-1183090055-1220658180-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\a5b002eacf54590ec8401ff6d3f920ee = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Microsoft\\MyClient\\jusched.exe"	Winlocker.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/files/0x000200000001e716-44.dat	upx
behavioral1/memory/4160-63-0x0000000000400000-0x0000000000C89000-memory.dmp	upx
behavioral1/memory/2668-177-0x0000000000400000-0x0000000000C89000-memory.dmp	upx
behavioral1/memory/4160-191-0x0000000000400000-0x0000000000C89000-memory.dmp	upx
behavioral1/memory/2668-195-0x0000000000400000-0x0000000000C89000-memory.dmp	upx

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svshost.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe
436	Winlocker.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	436	Winlocker.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
436	Winlocker.exe
436	Winlocker.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 436 wrote to memory of 4164	436	Winlocker.exe	92
PID 436 wrote to memory of 4164	436	Winlocker.exe	92
PID 436 wrote to memory of 4164	436	Winlocker.exe	92
PID 436 wrote to memory of 1436	436	Winlocker.exe	93
PID 436 wrote to memory of 1436	436	Winlocker.exe	93

C:\Users\Admin\AppData\Local\Temp\Winlocker.exe
"C:\Users\Admin\AppData\Local\Temp\Winlocker.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:436
- C:\Users\Admin\AppData\Local\Temp\svshost.exe
  "C:\Users\Admin\AppData\Local\Temp\svshost.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4164
- - C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe
    "C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe"
    3⤵
    PID:4160
- - C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe
    "C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe"
    3⤵
    PID:1280
  - - C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe
      "C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe"
      4⤵
      PID:624
    - - C:\Users\Admin\Documents\AudioDriver\taskhost.exe
        
        "C:\Users\Admin\Documents\AudioDriver\taskhost.exe"
        5⤵
        
        PID:1204
      - C:\Users\Admin\Documents\AudioDriver\taskhost.exe
        
        "C:\Users\Admin\Documents\AudioDriver\taskhost.exe"
        6⤵
        
        PID:2808
- C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\jusched.exe
  "C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\jusched.exe"
  2⤵
  - Executes dropped EXE
  PID:1436
- - C:\Users\Admin\AppData\Local\Temp\svshost.exe
    "C:\Users\Admin\AppData\Local\Temp\svshost.exe"
    3⤵
    PID:2900
  - - C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe
      "C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv5.exe"
      4⤵
      PID:2668
  - - C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe
      "C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe"
      4⤵
      PID:3292
    - - C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe
        
        "C:\Users\Admin\AppData\Local\Temp\upx_compresser.exe"
        5⤵
        
        PID:2976

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
11.0MB

MD5
5891817266ffedc10d4a84a3bd483239

SHA1
b59d365a91b50ec55ccc1c1b2a70cbf858382aa3

SHA256
51c45fb238881bd25fd7435d8b8e44eee9cc56887a56a7e5f5bdef8ec8392465

SHA512
517c5d785f069ce566c1d89fcc998968a5cdfc6d85bcc7e42cc2e720b4be9b543065cc1c7967635948595fdbb4af3fc7714c8b90aa6035953bca40cba7272c23

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

Filesize
3.0MB

MD5
0df533cb9a581de63e3522954a681603

SHA1
be46afa245289e0d9a84bd1fd1faea8d8c96da5e

SHA256
e3570b276e526f6fb6a289da32583b36cfbd98ec2f59d09c0243fbd0fc0805a3

SHA512
c973e3a8476879dad79f8b37f476d379b90f27cf64ecd359256df94fb811d69226dc50d1e8168d34787cc2d6abf407d8097e37cd60155650dad007a68263661e

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

Filesize
4.0MB

MD5
2df0daacf8be5126ddbaa7ba9a83be58

SHA1
0889fcd78f5bf71ca04280fe97b7507b6b114ba3

SHA256
0936e508e142466b6d83e49b27513be2207822f91ac2d038023a86d6ccd29b2a

SHA512
0348f7511803198d5d81b10bac08b9e9e79bfd1d193c9a72b1bf3883bd49d18ec21a998e4a056206fac539c73843b31c10437838eb38746bd062e682f2df120e

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

Filesize
1.1MB

MD5
0d833c6509f350e0a15492597df2bda6

SHA1
1f77b7eb4410f6e1c0e0f7b971a3c98b3f0a5f9f

SHA256
d280fdf95c57cba365c15fc9c6371ada79734480812497c2244246cfdac52ca7

SHA512
9e7ec8f4a756a2546c64850e0ca390788b9817984c1a91af55ffddfd3a010d7629478c2665c03a8a15d46377d66223f6937ac9d8d3d6bda5f9a1ee549ef16118

Download Submit
memory/436-10-0x00007FF80B270000-0x00007FF80BC11000-memory.dmp

Filesize
9.6MB

Download
memory/436-11-0x000000001ECB0000-0x000000001ED12000-memory.dmp

Filesize
392KB

Download
memory/436-6-0x000000001C920000-0x000000001C928000-memory.dmp

Filesize
32KB

Download
memory/436-7-0x000000001D750000-0x000000001D79C000-memory.dmp

Filesize
304KB

Download
memory/436-8-0x00007FF80B270000-0x00007FF80BC11000-memory.dmp

Filesize
9.6MB

Download
memory/436-9-0x00007FF80B270000-0x00007FF80BC11000-memory.dmp

Filesize
9.6MB

Download
memory/436-4-0x000000001D4F0000-0x000000001D58C000-memory.dmp

Filesize
624KB

Download
memory/436-5-0x00007FF80B270000-0x00007FF80BC11000-memory.dmp

Filesize
9.6MB

Download
memory/436-3-0x000000001CED0000-0x000000001D39E000-memory.dmp

Filesize
4.8MB

Download
memory/436-2-0x00007FF80B270000-0x00007FF80BC11000-memory.dmp

Filesize
9.6MB

Download
memory/436-66-0x00007FF80B270000-0x00007FF80BC11000-memory.dmp

Filesize
9.6MB

Download
memory/436-0-0x00007FF80B525000-0x00007FF80B526000-memory.dmp

Filesize
4KB

Download
memory/436-64-0x00007FF80B270000-0x00007FF80BC11000-memory.dmp

Filesize
9.6MB

Download
memory/436-40-0x00007FF80B525000-0x00007FF80B526000-memory.dmp

Filesize
4KB

Download
memory/436-41-0x00007FF80B270000-0x00007FF80BC11000-memory.dmp

Filesize
9.6MB

Download
memory/436-1-0x000000001C950000-0x000000001C9F6000-memory.dmp

Filesize
664KB

Download
memory/624-67-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/624-69-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/624-161-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1204-152-0x0000000000400000-0x000000000052A000-memory.dmp

Filesize
1.2MB

Download
memory/1280-70-0x0000000000400000-0x000000000052A000-memory.dmp

Filesize
1.2MB

Download
memory/1436-188-0x00007FF80B270000-0x00007FF80BC11000-memory.dmp

Filesize
9.6MB

Download
memory/1436-39-0x00007FF80B270000-0x00007FF80BC11000-memory.dmp

Filesize
9.6MB

Download
memory/1436-35-0x00007FF80B270000-0x00007FF80BC11000-memory.dmp

Filesize
9.6MB

Download
memory/1436-34-0x00007FF80B270000-0x00007FF80BC11000-memory.dmp

Filesize
9.6MB

Download
memory/1436-190-0x00007FF80B270000-0x00007FF80BC11000-memory.dmp

Filesize
9.6MB

Download
memory/1436-189-0x00007FF80B270000-0x00007FF80BC11000-memory.dmp

Filesize
9.6MB

Download
memory/2668-195-0x0000000000400000-0x0000000000C89000-memory.dmp

Filesize
8.5MB

Download
memory/2668-177-0x0000000000400000-0x0000000000C89000-memory.dmp

Filesize
8.5MB

Download
memory/2808-154-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2808-203-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2808-227-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2808-153-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2808-221-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2808-193-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2808-218-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2808-197-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2808-200-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2808-215-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2808-206-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2808-209-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2808-212-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2976-186-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3292-184-0x0000000000400000-0x000000000052A000-memory.dmp

Filesize
1.2MB

Download
memory/4160-63-0x0000000000400000-0x0000000000C89000-memory.dmp

Filesize
8.5MB

Download
memory/4160-191-0x0000000000400000-0x0000000000C89000-memory.dmp

Filesize
8.5MB

Download