glupteba | a2d2a7677b7e0306f02ba20acc0495e72c7e6f0aa073c56df3bef313750dfda8

Analysis

max time kernel
150s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
02/06/2026, 10:38

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Report Analysis Logs

General

Target
tmpf3mxqrbj.exe
Size 4.0MB
Sample260602-mpf3lact4r
SHA256 a2d2a7677b7e0306f02ba20acc0495e72c7e6f0aa073c56df3bef313750dfda8
MD5 2101a63d83efc8b15fc7780928807fb0
SHA1 7ad7d41a83ed34c6cceef888e969bfcd053f9c87
SHA512 9fa619c82df85a572d6177e4dde387ad6222e60a587f600a938174591fb7b0ae34f3fd15dad9a6ec21aa30971b543e8442a51d24e86c2f1a220da2fb4afd090a
SSDEEP 98304:JrXjZ1wF2Mqs8BxOq+88oxELl0RGVNuXF6l5DqTHS3VNMt2MD:NXjZ1FrHBP+ho+sYHDqTHIi
TLSH
T12F1633E0A682C5F2DC31A93518B9FBF1297F0073C6714D8237F8126C7F584A5A51AB9B
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery dropper execution glupteba loader persistence privilege_escalation rootkit spyware trojan

Malware Config

Signatures

Family: Glupteba
Glupteba is a modular loader written in Golang with various components.
loader dropper glupteba

Glupteba payload 21 IoCs

resource	yara_rule
behavioral3/memory/4964-2-0x00000000051E0000-0x0000000005A57000-memory.dmp	family_glupteba
behavioral3/memory/4964-5-0x00000000051E0000-0x0000000005A57000-memory.dmp	family_glupteba
behavioral3/memory/4964-4-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/3036-12-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/4884-17-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/788-27-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/224-28-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/4580-29-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/672-30-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/4580-31-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/4580-32-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/4580-33-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/4580-34-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/4580-35-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/4580-36-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/4580-37-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/4580-38-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/4580-39-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/4580-40-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/4580-41-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba
behavioral3/memory/4580-42-0x0000000000400000-0x0000000002FF9000-memory.dmp	family_glupteba

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4224	netsh.exe

Executes dropped EXE 6 IoCs

pid	Process
4580	csrss.exe
4884	csrss.exe
224	csrss.exe
788	csrss.exe
3336	injector.exe
672	csrss.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-1-5-21-1679180529-4058988202-686829476-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	tmpf3mxqrbj.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1679180529-4058988202-686829476-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	csrss.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Contacts third-party web service commonly abused for C2 1 TTPs 2 IoCs

Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

Web Service

T1102

flow	ioc
1	raw.githubusercontent.com
40	raw.githubusercontent.com

Manipulates WinMonFS driver. 1 IoCs

Roottkits write to WinMonFS to hide directories/files from being detected.

rootkit defense_evasion

description	ioc	Process
File opened for modification	\??\WinMonFS	csrss.exe

Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs

Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\VBoxMiniRdrDN	tmpf3mxqrbj.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\rss	tmpf3mxqrbj.exe
File created	C:\Windows\rss\csrss.exe	tmpf3mxqrbj.exe

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe

Modifies trusted root certificate store through registry 1 TTPs 2 IoCs

A root certificate was added, modified, or removed in the trusted certificate store registry paths.

defense_evasion

Install Root Certificate

T1553.004

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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	csrss.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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	csrss.exe

Program crash 5 IoCs

pid	pid_target	Process	procid_target
4896	3036	WerFault.exe	86
1524	4884	WerFault.exe	95
1460	788	WerFault.exe	110
4848	224	WerFault.exe	96
648	672	WerFault.exe	113

System Location Discovery: System Language Discovery 1 TTPs 7 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	tmpf3mxqrbj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmpf3mxqrbj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrss.exe

Modifies data under HKEY_USERS 40 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	csrss.exe

Modifies system certificate store 2 TTPs 1 IoCs

defense_evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8	csrss.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1116	schtasks.exe
4516	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4964	tmpf3mxqrbj.exe
4964	tmpf3mxqrbj.exe
3036	tmpf3mxqrbj.exe
3036	tmpf3mxqrbj.exe
3036	tmpf3mxqrbj.exe
3036	tmpf3mxqrbj.exe
3036	tmpf3mxqrbj.exe
3036	tmpf3mxqrbj.exe
3036	tmpf3mxqrbj.exe
3036	tmpf3mxqrbj.exe
3036	tmpf3mxqrbj.exe
3036	tmpf3mxqrbj.exe
4884	csrss.exe
4884	csrss.exe
3336	injector.exe
3336	injector.exe
788	csrss.exe
788	csrss.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
4580	csrss.exe
4580	csrss.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
4580	csrss.exe
4580	csrss.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe
3336	injector.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	4964	tmpf3mxqrbj.exe
Token: SeImpersonatePrivilege	4964	tmpf3mxqrbj.exe
Token: SeDebugPrivilege	4884	csrss.exe
Token: SeImpersonatePrivilege	4884	csrss.exe
Token: SeSystemEnvironmentPrivilege	4580	csrss.exe
Token: SeDebugPrivilege	788	csrss.exe
Token: SeImpersonatePrivilege	788	csrss.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3036 wrote to memory of 4972	3036	tmpf3mxqrbj.exe	87
PID 4972 wrote to memory of 4224	4972	cmd.exe	89
PID 3036 wrote to memory of 4580	3036	tmpf3mxqrbj.exe	90
PID 4580 wrote to memory of 3336	4580	csrss.exe	111

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\tmpf3mxqrbj.exe
"C:\Users\Admin\AppData\Local\Temp\tmpf3mxqrbj.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4964
- C:\Users\Admin\AppData\Local\Temp\tmpf3mxqrbj.exe
  "C:\Users\Admin\AppData\Local\Temp\tmpf3mxqrbj.exe"
  2⤵
  - Adds Run key to start application
  - Checks for VirtualBox DLLs, possible anti-VM trick
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3036
- - C:\Windows\system32\cmd.exe
    C:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4972
  - - C:\Windows\system32\netsh.exe
      netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes
      4⤵
      Modifies Windows Firewall
      Event Triggered Execution: Netsh Helper DLL
      PID:4224
- - C:\Windows\rss\csrss.exe
    C:\Windows\rss\csrss.exe
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Manipulates WinMonFS driver.
    - Modifies trusted root certificate store through registry
    - System Location Discovery: System Language Discovery
    - Modifies data under HKEY_USERS
    - Modifies system certificate store
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4580
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1116
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /delete /tn ScheduledUpdate /f
      4⤵
      PID:440
  - - C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
      C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe taskmgr.exe C:\Users\Admin\AppData\Local\Temp\csrss\injector\NtQuerySystemInformationHook.dll
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:3336
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:4516
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3036 -s 812
    3⤵
    - Program crash
    PID:4896

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3036 -ip 3036
1⤵
PID:5096

C:\Windows\rss\csrss.exe
"C:\Windows\rss\csrss.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4884
- C:\Windows\rss\csrss.exe
  "C:\Windows\rss\csrss.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:224
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 224 -s 844
    3⤵
    - Program crash
    PID:4848
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4884 -s 872
  2⤵
  - Program crash
  PID:1524

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 356 -p 4884 -ip 4884
1⤵
PID:1860

C:\Windows\rss\csrss.exe
C:\Windows\rss\csrss.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:788
- C:\Windows\rss\csrss.exe
  "C:\Windows\rss\csrss.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:672
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 672 -s 732
    3⤵
    - Program crash
    PID:648
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 788 -s 836
  2⤵
  - Program crash
  PID:1460

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 788 -ip 788
1⤵
PID:2940

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 224 -ip 224
1⤵
PID:1256

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 572 -p 672 -ip 672
1⤵
PID:1736

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Subvert Trust Controls

T1553

Install Root Certificate

T1553.004

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

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

injector.exe

Path C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
Size 281KB
SHA256 5de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1
MD5 d98e33b66343e7c96158444127a117f6
SHA1 bb716c5509a2bf345c6c1152f6e3e1452d39d50d
SHA512 705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5
SSDEEP 3072:qbHszDaOJ8u2HHFIWr6e29kOnK7qFQ8wMii5I7kGvNjzMuszHshoY46bEydJ+dK9:SA3IlIA6e29vngqS8wMmuooh8z+8F
TLSH
T17B546C5AB2A918F8ED77823CC8525516F672B8160730D6EF03A447672F276E09D3FB21
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

csrss.exe

Path C:\Windows\rss\csrss.exe
Size 4.0MB
SHA256 a2d2a7677b7e0306f02ba20acc0495e72c7e6f0aa073c56df3bef313750dfda8
MD5 2101a63d83efc8b15fc7780928807fb0
SHA1 7ad7d41a83ed34c6cceef888e969bfcd053f9c87
SHA512 9fa619c82df85a572d6177e4dde387ad6222e60a587f600a938174591fb7b0ae34f3fd15dad9a6ec21aa30971b543e8442a51d24e86c2f1a220da2fb4afd090a
SSDEEP 98304:JrXjZ1wF2Mqs8BxOq+88oxELl0RGVNuXF6l5DqTHS3VNMt2MD:NXjZ1FrHBP+ho+sYHDqTHIi
TLSH
T12F1633E0A682C5F2DC31A93518B9FBF1297F0073C6714D8237F8126C7F584A5A51AB9B
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/224-28-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/672-30-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/788-27-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/3036-12-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/3036-6-0x0000000003540000-0x0000000003931000-memory.dmp

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memory/4580-34-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/4580-38-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/4580-43-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/4580-42-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/4580-29-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/4580-41-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/4580-31-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/4580-32-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/4580-40-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/4580-35-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/4580-39-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/4580-36-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/4580-37-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/4580-33-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/4884-17-0x0000000000400000-0x0000000002FF9000-memory.dmp

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memory/4964-5-0x00000000051E0000-0x0000000005A57000-memory.dmp

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memory/4964-2-0x00000000051E0000-0x0000000005A57000-memory.dmp

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memory/4964-1-0x0000000003450000-0x000000000383B000-memory.dmp

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memory/4964-4-0x0000000000400000-0x0000000002FF9000-memory.dmp

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