zgrat | b56c7eb4bc0fb792543e4e52056922151cb34a96d948c0ae576f995916ab846c

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
31-12-2023 12:50

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General

Target

36c1d1f6b1379323dbce4fd7c1877451.exe
Size

374KB
MD5

36c1d1f6b1379323dbce4fd7c1877451
SHA1

28f2fe2d0d3e503a21eb38e0f1689892c2ef6564
SHA256

b56c7eb4bc0fb792543e4e52056922151cb34a96d948c0ae576f995916ab846c
SHA512

a535626e5d4564401f17fa8dfe14bb3e2e116feb1cf7bc1f0d543b72d23f59631c08fa8201df616f8fc5b11d76b9b29dd3d46f7b60fdcfd22fd5cf616007173a
SSDEEP

6144:ZOOAs8obIAPF2iJ6s2509pQOO5tgWJ1IS+aBkDKuBZ:oC8obIAPsiJ6sF98gWJ1R+aiGaZ

Score

10^/10

zgrat persistence rat

Malware Config

Signatures

Detect ZGRat V1 34 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3316-7-0x0000000006CB0000-0x0000000006D38000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-8-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-11-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-9-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-13-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-29-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-45-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-59-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-67-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-65-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-63-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-71-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-69-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-61-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-57-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-55-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-53-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-51-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-49-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-47-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-43-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-41-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-39-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-37-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-35-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-33-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-31-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-27-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-25-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-23-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-21-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-19-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-17-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1
behavioral2/memory/3316-15-0x0000000006CB0000-0x0000000006D32000-memory.dmp	family_zgrat_v1

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

Processes:

36c1d1f6b1379323dbce4fd7c1877451.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\JavaUpdate\\JavaUpdate.exe\","	36c1d1f6b1379323dbce4fd7c1877451.exe

ZGRat
ZGRat is remote access trojan written in C#.
rat zgrat

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

Processes:

WScript.exe36c1d1f6b1379323dbce4fd7c1877451.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	36c1d1f6b1379323dbce4fd7c1877451.exe

Deletes itself 1 IoCs

Processes:

powershell.exe

pid process

1444 powershell.exe
Executes dropped EXE 1 IoCs

Processes:

InstallUtil.exe

pid process

3432 InstallUtil.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

36c1d1f6b1379323dbce4fd7c1877451.exe

description pid process target process

PID 3316 set thread context of 3432 3316 36c1d1f6b1379323dbce4fd7c1877451.exe InstallUtil.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1444	powershell.exe

pid	process
3432	InstallUtil.exe

description	pid	process	target process
PID 3316 set thread context of 3432	3316	36c1d1f6b1379323dbce4fd7c1877451.exe	InstallUtil.exe

Modifies registry class 1 IoCs

Processes:

36c1d1f6b1379323dbce4fd7c1877451.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000_Classes\Local Settings	36c1d1f6b1379323dbce4fd7c1877451.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

36c1d1f6b1379323dbce4fd7c1877451.exepowershell.exepowershell.exe

pid	process
3316	36c1d1f6b1379323dbce4fd7c1877451.exe
3316	36c1d1f6b1379323dbce4fd7c1877451.exe
1292	powershell.exe
1292	powershell.exe
1444	powershell.exe
1444	powershell.exe
1444	powershell.exe
1292	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

36c1d1f6b1379323dbce4fd7c1877451.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	3316	36c1d1f6b1379323dbce4fd7c1877451.exe
Token: SeDebugPrivilege	1444	powershell.exe
Token: SeDebugPrivilege	1292	powershell.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

36c1d1f6b1379323dbce4fd7c1877451.exeWScript.exe

description	pid	process	target process
PID 3316 wrote to memory of 4708	3316	36c1d1f6b1379323dbce4fd7c1877451.exe	WScript.exe
PID 3316 wrote to memory of 4708	3316	36c1d1f6b1379323dbce4fd7c1877451.exe	WScript.exe
PID 3316 wrote to memory of 4708	3316	36c1d1f6b1379323dbce4fd7c1877451.exe	WScript.exe
PID 3316 wrote to memory of 1444	3316	36c1d1f6b1379323dbce4fd7c1877451.exe	powershell.exe
PID 3316 wrote to memory of 1444	3316	36c1d1f6b1379323dbce4fd7c1877451.exe	powershell.exe
PID 3316 wrote to memory of 1444	3316	36c1d1f6b1379323dbce4fd7c1877451.exe	powershell.exe
PID 3316 wrote to memory of 3432	3316	36c1d1f6b1379323dbce4fd7c1877451.exe	InstallUtil.exe
PID 3316 wrote to memory of 3432	3316	36c1d1f6b1379323dbce4fd7c1877451.exe	InstallUtil.exe
PID 3316 wrote to memory of 3432	3316	36c1d1f6b1379323dbce4fd7c1877451.exe	InstallUtil.exe
PID 3316 wrote to memory of 3432	3316	36c1d1f6b1379323dbce4fd7c1877451.exe	InstallUtil.exe
PID 3316 wrote to memory of 3432	3316	36c1d1f6b1379323dbce4fd7c1877451.exe	InstallUtil.exe
PID 3316 wrote to memory of 3432	3316	36c1d1f6b1379323dbce4fd7c1877451.exe	InstallUtil.exe
PID 3316 wrote to memory of 3432	3316	36c1d1f6b1379323dbce4fd7c1877451.exe	InstallUtil.exe
PID 3316 wrote to memory of 3432	3316	36c1d1f6b1379323dbce4fd7c1877451.exe	InstallUtil.exe
PID 4708 wrote to memory of 1292	4708	WScript.exe	powershell.exe
PID 4708 wrote to memory of 1292	4708	WScript.exe	powershell.exe
PID 4708 wrote to memory of 1292	4708	WScript.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\36c1d1f6b1379323dbce4fd7c1877451.exe
"C:\Users\Admin\AppData\Local\Temp\36c1d1f6b1379323dbce4fd7c1877451.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Suspicious use of SetThreadContext
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3316

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\_Ytdjnmbey.vbs"
2⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4708

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionPath C:\,'C:\Users\Admin\AppData\Local\JavaUpdate\JavaUpdate.exe'
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1292

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Start-Sleep -s 5; Remove-Item -Path "C:\Users\Admin\AppData\Local\Temp\36c1d1f6b1379323dbce4fd7c1877451.exe" -Force
2⤵
- Deletes itself
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1444

C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
2⤵
- Executes dropped EXE
PID:3432

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/1292-2596-0x000000007F1F0000-0x000000007F200000-memory.dmp

Filesize
64KB

Download
memory/1292-2618-0x0000000007980000-0x000000000798E000-memory.dmp

Filesize
56KB

Download
memory/1292-2569-0x0000000074620000-0x0000000074DD0000-memory.dmp

Filesize
7.7MB

Download
memory/1292-2570-0x0000000005BB0000-0x0000000005BD2000-memory.dmp

Filesize
136KB

Download
memory/1292-2620-0x0000000007AA0000-0x0000000007ABA000-memory.dmp

Filesize
104KB

Download
memory/1292-2621-0x00000000079D0000-0x00000000079D8000-memory.dmp

Filesize
32KB

Download
memory/1292-2619-0x0000000007990000-0x00000000079A4000-memory.dmp

Filesize
80KB

Download
memory/1292-2600-0x0000000070460000-0x00000000704AC000-memory.dmp

Filesize
304KB

Download
memory/1292-2616-0x0000000007950000-0x0000000007961000-memory.dmp

Filesize
68KB

Download
memory/1292-2615-0x00000000079E0000-0x0000000007A76000-memory.dmp

Filesize
600KB

Download
memory/1292-2614-0x00000000077B0000-0x00000000077BA000-memory.dmp

Filesize
40KB

Download
memory/1292-2610-0x0000000006A10000-0x0000000006A2E000-memory.dmp

Filesize
120KB

Download
memory/1292-2612-0x0000000004ED0000-0x0000000004EE0000-memory.dmp

Filesize
64KB

Download
memory/1292-2571-0x0000000004ED0000-0x0000000004EE0000-memory.dmp

Filesize
64KB

Download
memory/1292-2611-0x0000000004ED0000-0x0000000004EE0000-memory.dmp

Filesize
64KB

Download
memory/1292-2572-0x0000000004ED0000-0x0000000004EE0000-memory.dmp

Filesize
64KB

Download
memory/1292-2624-0x0000000074620000-0x0000000074DD0000-memory.dmp

Filesize
7.7MB

Download
memory/1292-2593-0x0000000006020000-0x0000000006374000-memory.dmp

Filesize
3.3MB

Download
memory/1292-2613-0x0000000007640000-0x00000000076E3000-memory.dmp

Filesize
652KB

Download
memory/1292-2598-0x0000000007600000-0x0000000007632000-memory.dmp

Filesize
200KB

Download
memory/1444-2573-0x0000000005F40000-0x0000000005FA6000-memory.dmp

Filesize
408KB

Download
memory/1444-2594-0x0000000006630000-0x000000000664E000-memory.dmp

Filesize
120KB

Download
memory/1444-2629-0x0000000074620000-0x0000000074DD0000-memory.dmp

Filesize
7.7MB

Download
memory/1444-2584-0x0000000006020000-0x0000000006086000-memory.dmp

Filesize
408KB

Download
memory/1444-2597-0x0000000007C80000-0x00000000082FA000-memory.dmp

Filesize
6.5MB

Download
memory/1444-2595-0x0000000006670000-0x00000000066BC000-memory.dmp

Filesize
304KB

Download
memory/1444-2599-0x0000000006B60000-0x0000000006B7A000-memory.dmp

Filesize
104KB

Download
memory/1444-2564-0x0000000005060000-0x0000000005096000-memory.dmp

Filesize
216KB

Download
memory/1444-2625-0x0000000006C10000-0x0000000006C32000-memory.dmp

Filesize
136KB

Download
memory/1444-2565-0x0000000074620000-0x0000000074DD0000-memory.dmp

Filesize
7.7MB

Download
memory/1444-2567-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/1444-2568-0x0000000005810000-0x0000000005E38000-memory.dmp

Filesize
6.2MB

Download
memory/1444-2566-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/3316-61-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-57-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-27-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-25-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-23-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-21-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-19-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-17-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-15-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-1030-0x0000000005810000-0x0000000005820000-memory.dmp

Filesize
64KB

Download
memory/3316-2561-0x0000000074620000-0x0000000074DD0000-memory.dmp

Filesize
7.7MB

Download
memory/3316-33-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-35-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-37-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-39-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-41-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-43-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-47-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-49-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-51-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-53-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-103-0x0000000074620000-0x0000000074DD0000-memory.dmp

Filesize
7.7MB

Download
memory/3316-1-0x0000000074620000-0x0000000074DD0000-memory.dmp

Filesize
7.7MB

Download
memory/3316-2-0x0000000005D70000-0x0000000006314000-memory.dmp

Filesize
5.6MB

Download
memory/3316-55-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-31-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-0-0x0000000000F30000-0x0000000000F92000-memory.dmp

Filesize
392KB

Download
memory/3316-69-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-71-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-63-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-65-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-67-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-59-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-45-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-29-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-13-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-9-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-11-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-8-0x0000000006CB0000-0x0000000006D32000-memory.dmp

Filesize
520KB

Download
memory/3316-7-0x0000000006CB0000-0x0000000006D38000-memory.dmp

Filesize
544KB

Download
memory/3316-3-0x00000000058C0000-0x0000000005952000-memory.dmp

Filesize
584KB

Download
memory/3316-6-0x0000000006B20000-0x0000000006B72000-memory.dmp

Filesize
328KB

Download
memory/3316-5-0x0000000005870000-0x000000000587A000-memory.dmp

Filesize
40KB

Download
memory/3316-4-0x0000000005810000-0x0000000005820000-memory.dmp

Filesize
64KB

Download
memory/3432-2617-0x0000000005480000-0x0000000005490000-memory.dmp

Filesize
64KB

Download
memory/3432-2562-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/3432-2563-0x0000000074620000-0x0000000074DD0000-memory.dmp

Filesize
7.7MB

Download
memory/3432-2630-0x0000000074620000-0x0000000074DD0000-memory.dmp

Filesize
7.7MB

Download
memory/3432-2631-0x0000000005480000-0x0000000005490000-memory.dmp

Filesize
64KB

Download