Malware Analysis Report

2025-08-10 21:14

Sample ID 221011-gzbb7shfg4
Target fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f
SHA256 fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f
Tags
darkcomet guest16 persistence rat trojan upx
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f

Threat Level: Known bad

The file fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f was found to be: Known bad.

Malicious Activity Summary

darkcomet guest16 persistence rat trojan upx

Darkcomet

Executes dropped EXE

UPX packed file

Adds Run key to start application

Suspicious use of SetThreadContext

Drops file in Windows directory

Enumerates physical storage devices

Runs net.exe

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-10-11 06:14

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-11 06:14

Reported

2022-10-11 09:01

Platform

win7-20220812-en

Max time kernel

144s

Max time network

46s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f.exe"

Signatures

N/A

Processes

C:\Users\Admin\AppData\Local\Temp\fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f.exe

"C:\Users\Admin\AppData\Local\Temp\fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f.exe"

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-11 06:14

Reported

2022-10-11 09:01

Platform

win10v2004-20220812-en

Max time kernel

148s

Max time network

156s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f.exe"

Signatures

Darkcomet

trojan rat darkcomet

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\InstallDir\help.exe N/A
N/A N/A C:\Windows\InstallDir\help.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-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\help = "C:\\Windows\\InstallDir\\help.exe" C:\Windows\InstallDir\help.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\help = "C:\\Windows\\InstallDir\\help.exe" C:\Windows\InstallDir\help.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4380 set thread context of 4944 N/A C:\Windows\InstallDir\help.exe C:\Windows\InstallDir\help.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\InstallDir C:\Users\Admin\AppData\Local\Temp\fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f.exe N/A
File created C:\Windows\InstallDir\help.exe C:\Users\Admin\AppData\Local\Temp\fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f.exe N/A
File opened for modification C:\Windows\InstallDir\help.exe C:\Users\Admin\AppData\Local\Temp\fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f.exe N/A

Enumerates physical storage devices

Runs net.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeChangeNotifyPrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeImpersonatePrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: SeCreateGlobalPrivilege N/A C:\Windows\InstallDir\help.exe N/A
Token: 33 N/A C:\Windows\InstallDir\help.exe N/A
Token: 34 N/A C:\Windows\InstallDir\help.exe N/A
Token: 35 N/A C:\Windows\InstallDir\help.exe N/A
Token: 36 N/A C:\Windows\InstallDir\help.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\InstallDir\help.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4240 wrote to memory of 4380 N/A C:\Users\Admin\AppData\Local\Temp\fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f.exe C:\Windows\InstallDir\help.exe
PID 4240 wrote to memory of 4380 N/A C:\Users\Admin\AppData\Local\Temp\fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f.exe C:\Windows\InstallDir\help.exe
PID 4240 wrote to memory of 4380 N/A C:\Users\Admin\AppData\Local\Temp\fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f.exe C:\Windows\InstallDir\help.exe
PID 4380 wrote to memory of 2888 N/A C:\Windows\InstallDir\help.exe C:\Windows\SysWOW64\cmd.exe
PID 4380 wrote to memory of 2888 N/A C:\Windows\InstallDir\help.exe C:\Windows\SysWOW64\cmd.exe
PID 4380 wrote to memory of 2888 N/A C:\Windows\InstallDir\help.exe C:\Windows\SysWOW64\cmd.exe
PID 4380 wrote to memory of 4944 N/A C:\Windows\InstallDir\help.exe C:\Windows\InstallDir\help.exe
PID 4380 wrote to memory of 4944 N/A C:\Windows\InstallDir\help.exe C:\Windows\InstallDir\help.exe
PID 4380 wrote to memory of 4944 N/A C:\Windows\InstallDir\help.exe C:\Windows\InstallDir\help.exe
PID 4380 wrote to memory of 4944 N/A C:\Windows\InstallDir\help.exe C:\Windows\InstallDir\help.exe
PID 4380 wrote to memory of 4944 N/A C:\Windows\InstallDir\help.exe C:\Windows\InstallDir\help.exe
PID 4380 wrote to memory of 4944 N/A C:\Windows\InstallDir\help.exe C:\Windows\InstallDir\help.exe
PID 4380 wrote to memory of 4944 N/A C:\Windows\InstallDir\help.exe C:\Windows\InstallDir\help.exe
PID 4380 wrote to memory of 4944 N/A C:\Windows\InstallDir\help.exe C:\Windows\InstallDir\help.exe
PID 2888 wrote to memory of 224 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\net.exe
PID 2888 wrote to memory of 224 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\net.exe
PID 2888 wrote to memory of 224 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\net.exe
PID 224 wrote to memory of 2324 N/A C:\Windows\SysWOW64\net.exe C:\Windows\SysWOW64\net1.exe
PID 224 wrote to memory of 2324 N/A C:\Windows\SysWOW64\net.exe C:\Windows\SysWOW64\net1.exe
PID 224 wrote to memory of 2324 N/A C:\Windows\SysWOW64\net.exe C:\Windows\SysWOW64\net1.exe

Processes

C:\Users\Admin\AppData\Local\Temp\fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f.exe

"C:\Users\Admin\AppData\Local\Temp\fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f.exe"

C:\Windows\InstallDir\help.exe

C:\Windows\InstallDir\help.exe

C:\Windows\SysWOW64\cmd.exe

/c net stop MpsSvc

C:\Windows\InstallDir\help.exe

C:\Windows\InstallDir\help.exe

C:\Windows\SysWOW64\net.exe

net stop MpsSvc

C:\Windows\SysWOW64\net1.exe

C:\Windows\system32\net1 stop MpsSvc

Network

Country Destination Domain Proto
US 93.184.220.29:80 tcp
US 93.184.220.29:80 tcp
US 93.184.220.29:80 tcp
US 93.184.220.29:80 tcp
US 108.212.228.172:1231 tcp
IE 13.69.239.72:443 tcp
US 93.184.221.240:80 tcp
US 8.8.8.8:53 96.108.152.52.in-addr.arpa udp
US 108.212.228.172:1231 tcp
NL 104.80.225.205:443 tcp
US 8.8.8.8:53 f.7.6.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.7.0.0.0.0.3.0.1.3.0.6.2.ip6.arpa udp
US 108.212.228.172:1231 tcp
US 108.212.228.172:1231 tcp
US 108.212.228.172:1231 tcp
US 108.212.228.172:1231 tcp

Files

memory/4240-132-0x00000000004C0000-0x00000000004C6000-memory.dmp

memory/4380-133-0x0000000000000000-mapping.dmp

C:\Windows\InstallDir\help.exe

MD5 65a87dffa5617ef83fa7e82df1d57e20
SHA1 be61d5cf9783929a606c17c48144b9346c2b2dee
SHA256 fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f
SHA512 0828535c4678922fca86f861ea855efd7f418286d51431184ab1d896800f9f14db5be3058931ab77f182cb5bf77809fbcbe9fe7a7f8a7e246dae3c858bae877b

C:\Windows\InstallDir\help.exe

MD5 65a87dffa5617ef83fa7e82df1d57e20
SHA1 be61d5cf9783929a606c17c48144b9346c2b2dee
SHA256 fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f
SHA512 0828535c4678922fca86f861ea855efd7f418286d51431184ab1d896800f9f14db5be3058931ab77f182cb5bf77809fbcbe9fe7a7f8a7e246dae3c858bae877b

memory/2888-136-0x0000000000000000-mapping.dmp

memory/4944-137-0x0000000000000000-mapping.dmp

memory/4944-138-0x0000000000400000-0x00000000004B7000-memory.dmp

C:\Windows\InstallDir\help.exe

MD5 65a87dffa5617ef83fa7e82df1d57e20
SHA1 be61d5cf9783929a606c17c48144b9346c2b2dee
SHA256 fc785230d7610c48808ce0ca635ce4230b20984bb8068bd488b4efdadf40f64f
SHA512 0828535c4678922fca86f861ea855efd7f418286d51431184ab1d896800f9f14db5be3058931ab77f182cb5bf77809fbcbe9fe7a7f8a7e246dae3c858bae877b

memory/4944-140-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/224-141-0x0000000000000000-mapping.dmp

memory/4944-142-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/2324-143-0x0000000000000000-mapping.dmp

memory/4944-144-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/4944-145-0x0000000000400000-0x00000000004B7000-memory.dmp