metasploit | 7eeb83d06fdfe62783fcf9ecbb0348e0b4860867e8c9dfbe82fdec7f5e1c87e3

Analysis

max time kernel
146s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04/02/2024, 01:54

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General

Target
8a97bd1972cca7c70bde218a0811c13b.exe
Size 255KB
Sample240204-cbqd1aegg2
SHA256 7eeb83d06fdfe62783fcf9ecbb0348e0b4860867e8c9dfbe82fdec7f5e1c87e3
MD5 8a97bd1972cca7c70bde218a0811c13b
SHA1 b27879b9cd1658bc0e7b5b7a04ae0630b95b6437
SHA512 81bdecac9f10eb50af33c9bcf89caebeca2ae3b5feac509e50a6968f879ffc9f23c0a2403c09630de483133fd00f6b38161f37a1bfb50501f2ff8c0edd39b84a
SSDEEP 3072:JkHuQMLUdqtNYqkBd+76jOrXolyYq0hvS0hm4iDDg+pgAQH4+/5Bn6fvRS+QMA:JgahY7kYfhvI4iQ+pmY+/P6fw+QMA
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

metasploit backdoor evasion persistence trojan upx

Malware Config

Extracted

Family

metasploit

Version

encoder/call4_dword_xor

Signatures

MetaSploit
Detected malicious payload which is part of the Metasploit Framework, likely generated with msfvenom or similar.
trojan backdoor metasploit

Modifies firewall policy service 2 TTPs 8 IoCs

evasion

Modify Registry

T1112

Windows Service

T1543.003

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	igfxcb32.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications	igfxcb32.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Windows\SysWOW64\igfxcb32.exe = "C:\\Windows\\SysWOW64\\igfxcb32.exe:*:Enabled:Intel Backup iDrive"	igfxcb32.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List	igfxcb32.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile	igfxcb32.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications	igfxcb32.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List\C:\Windows\SysWOW64\igfxcb32.exe = "C:\\Windows\\SysWOW64\\igfxcb32.exe:*:Enabled:Intel Backup iDrive"	igfxcb32.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	igfxcb32.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	8a97bd1972cca7c70bde218a0811c13b.exe

Deletes itself 1 IoCs

pid	Process
3352	igfxcb32.exe

Executes dropped EXE 2 IoCs

pid	Process
880	igfxcb32.exe
3352	igfxcb32.exe

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4920-0-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/4920-2-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/4920-4-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/4920-3-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/4920-38-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/3352-45-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/3352-46-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/3352-47-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/3352-51-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/3352-57-0x0000000000400000-0x0000000000467000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Intel Backup iDrive = "C:\\Windows\\SysWOW64\\igfxcb32.exe"	igfxcb32.exe

Maps connected drives based on registry 3 TTPs 4 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	8a97bd1972cca7c70bde218a0811c13b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	igfxcb32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	igfxcb32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	8a97bd1972cca7c70bde218a0811c13b.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\igfxcb32.exe	8a97bd1972cca7c70bde218a0811c13b.exe
File opened for modification	C:\Windows\SysWOW64\	igfxcb32.exe
File opened for modification	C:\Windows\SysWOW64\igfxcb32.exe	igfxcb32.exe
File opened for modification	C:\Windows\SysWOW64\	8a97bd1972cca7c70bde218a0811c13b.exe
File opened for modification	C:\Windows\SysWOW64\igfxcb32.exe	8a97bd1972cca7c70bde218a0811c13b.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2280 set thread context of 4920	2280	8a97bd1972cca7c70bde218a0811c13b.exe	85
PID 880 set thread context of 3352	880	igfxcb32.exe	91

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	8a97bd1972cca7c70bde218a0811c13b.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
4920	8a97bd1972cca7c70bde218a0811c13b.exe
4920	8a97bd1972cca7c70bde218a0811c13b.exe
4920	8a97bd1972cca7c70bde218a0811c13b.exe
4920	8a97bd1972cca7c70bde218a0811c13b.exe
3352	igfxcb32.exe
3352	igfxcb32.exe
3352	igfxcb32.exe
3352	igfxcb32.exe
3352	igfxcb32.exe
3352	igfxcb32.exe
3352	igfxcb32.exe
3352	igfxcb32.exe
3352	igfxcb32.exe
3352	igfxcb32.exe
3352	igfxcb32.exe
3352	igfxcb32.exe
3352	igfxcb32.exe
3352	igfxcb32.exe
3352	igfxcb32.exe
3352	igfxcb32.exe
3352	igfxcb32.exe
3352	igfxcb32.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 4920	2280	8a97bd1972cca7c70bde218a0811c13b.exe	85
PID 2280 wrote to memory of 4920	2280	8a97bd1972cca7c70bde218a0811c13b.exe	85
PID 2280 wrote to memory of 4920	2280	8a97bd1972cca7c70bde218a0811c13b.exe	85
PID 2280 wrote to memory of 4920	2280	8a97bd1972cca7c70bde218a0811c13b.exe	85
PID 2280 wrote to memory of 4920	2280	8a97bd1972cca7c70bde218a0811c13b.exe	85
PID 2280 wrote to memory of 4920	2280	8a97bd1972cca7c70bde218a0811c13b.exe	85
PID 2280 wrote to memory of 4920	2280	8a97bd1972cca7c70bde218a0811c13b.exe	85
PID 2280 wrote to memory of 4920	2280	8a97bd1972cca7c70bde218a0811c13b.exe	85
PID 4920 wrote to memory of 880	4920	8a97bd1972cca7c70bde218a0811c13b.exe	90
PID 4920 wrote to memory of 880	4920	8a97bd1972cca7c70bde218a0811c13b.exe	90
PID 4920 wrote to memory of 880	4920	8a97bd1972cca7c70bde218a0811c13b.exe	90
PID 880 wrote to memory of 3352	880	igfxcb32.exe	91
PID 880 wrote to memory of 3352	880	igfxcb32.exe	91
PID 880 wrote to memory of 3352	880	igfxcb32.exe	91
PID 880 wrote to memory of 3352	880	igfxcb32.exe	91
PID 880 wrote to memory of 3352	880	igfxcb32.exe	91
PID 880 wrote to memory of 3352	880	igfxcb32.exe	91
PID 880 wrote to memory of 3352	880	igfxcb32.exe	91
PID 880 wrote to memory of 3352	880	igfxcb32.exe	91
PID 3352 wrote to memory of 3528	3352	igfxcb32.exe	33
PID 3352 wrote to memory of 3528	3352	igfxcb32.exe	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3528
- C:\Users\Admin\AppData\Local\Temp\8a97bd1972cca7c70bde218a0811c13b.exe
  "C:\Users\Admin\AppData\Local\Temp\8a97bd1972cca7c70bde218a0811c13b.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:2280
- - C:\Users\Admin\AppData\Local\Temp\8a97bd1972cca7c70bde218a0811c13b.exe
    "C:\Users\Admin\AppData\Local\Temp\8a97bd1972cca7c70bde218a0811c13b.exe"
    3⤵
    - Checks computer location settings
    - Maps connected drives based on registry
    - Drops file in System32 directory
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4920
  - - C:\Windows\SysWOW64\igfxcb32.exe
      "C:\Windows\SysWOW64\igfxcb32.exe" C:\Users\Admin\AppData\Local\Temp\8A97BD~1.EXE
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:880
    - - C:\Windows\SysWOW64\igfxcb32.exe
        
        "C:\Windows\SysWOW64\igfxcb32.exe" C:\Users\Admin\AppData\Local\Temp\8A97BD~1.EXE
        5⤵
        Modifies firewall policy service
        Deletes itself
        Executes dropped EXE
        Adds Run key to start application
        Maps connected drives based on registry
        Drops file in System32 directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:3352

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

Create or Modify System Process

T1543

Windows Service

T1543.003

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

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

igfxcb32.exe

Path C:\Windows\SysWOW64\igfxcb32.exe
Size 255KB
SHA256 7eeb83d06fdfe62783fcf9ecbb0348e0b4860867e8c9dfbe82fdec7f5e1c87e3
MD5 8a97bd1972cca7c70bde218a0811c13b
SHA1 b27879b9cd1658bc0e7b5b7a04ae0630b95b6437
SHA512 81bdecac9f10eb50af33c9bcf89caebeca2ae3b5feac509e50a6968f879ffc9f23c0a2403c09630de483133fd00f6b38161f37a1bfb50501f2ff8c0edd39b84a
SSDEEP 3072:JkHuQMLUdqtNYqkBd+76jOrXolyYq0hvS0hm4iDDg+pgAQH4+/5Bn6fvRS+QMA:JgahY7kYfhvI4iQ+pmY+/P6fw+QMA
MD5 SHA1 SHA512 SSDEEP

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memory/3352-45-0x0000000000400000-0x0000000000467000-memory.dmp

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memory/3352-46-0x0000000000400000-0x0000000000467000-memory.dmp

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memory/3352-47-0x0000000000400000-0x0000000000467000-memory.dmp

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memory/3352-51-0x0000000000400000-0x0000000000467000-memory.dmp

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memory/3352-57-0x0000000000400000-0x0000000000467000-memory.dmp

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memory/4920-0-0x0000000000400000-0x0000000000467000-memory.dmp

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memory/4920-2-0x0000000000400000-0x0000000000467000-memory.dmp

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memory/4920-4-0x0000000000400000-0x0000000000467000-memory.dmp

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memory/4920-3-0x0000000000400000-0x0000000000467000-memory.dmp

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memory/4920-38-0x0000000000400000-0x0000000000467000-memory.dmp

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