metasploit | 83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8cc

General

Target

83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
Size

140KB
MD5

baa490460067f3deca8bb90217fbfe90
SHA1

80726177d8f02887c2e4bbf72cafa3fe4f640fa2
SHA256

83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8cc
SHA512

8a94b043e48a1c94fa38c02c9e65152b957129b5028be7d48224f3eaae680cd3d1318ec44f1491db4246370c66d36d1c916070bd1faa893b21a1328e48621b4e
SSDEEP

3072:Cp651xEpsy1ai+6oTHzoMYypJTy4RhgVbYLr8imVu:lEb19/oTHzoMYynTy4C4hm8

Score

10^/10

metasploit backdoor discovery 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
Metasploit family
metasploit

Modifies firewall policy service 3 TTPs 8 IoCs

evasion

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	igfxvm32.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications	igfxvm32.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Windows\SysWOW64\igfxvm32.exe = "C:\\Windows\\SysWOW64\\igfxvm32.exe:*:Enabled:Intel Virtual Machine"	igfxvm32.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List	igfxvm32.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile	igfxvm32.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications	igfxvm32.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List\C:\Windows\SysWOW64\igfxvm32.exe = "C:\\Windows\\SysWOW64\\igfxvm32.exe:*:Enabled:Intel Virtual Machine"	igfxvm32.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	igfxvm32.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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe

Deletes itself 1 IoCs

pid	Process
4172	igfxvm32.exe

Executes dropped EXE 2 IoCs

pid	Process
4648	igfxvm32.exe
4172	igfxvm32.exe

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 Virtual Machine = "C:\\Windows\\SysWOW64\\igfxvm32.exe"	igfxvm32.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 opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	igfxvm32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	igfxvm32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
File opened for modification	C:\Windows\SysWOW64\igfxvm32.exe	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
File created	C:\Windows\SysWOW64\igfxvm32.exe	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
File opened for modification	C:\Windows\SysWOW64\	igfxvm32.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3004 set thread context of 4392	3004	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	84
PID 4648 set thread context of 4172	4648	igfxvm32.exe	91

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4392-0-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral2/memory/4392-2-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral2/memory/4392-4-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral2/memory/4392-3-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral2/memory/4392-41-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral2/memory/4172-44-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral2/memory/4392-47-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral2/memory/4392-46-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4172-48-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral2/memory/4172-49-0x0000000000400000-0x000000000044C000-memory.dmp	upx

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 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	igfxvm32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	igfxvm32.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4392	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
4392	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
4392	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
4392	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
4172	igfxvm32.exe
4172	igfxvm32.exe
4172	igfxvm32.exe
4172	igfxvm32.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
3004	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 3004 wrote to memory of 4392	3004	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	84
PID 3004 wrote to memory of 4392	3004	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	84
PID 3004 wrote to memory of 4392	3004	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	84
PID 3004 wrote to memory of 4392	3004	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	84
PID 3004 wrote to memory of 4392	3004	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	84
PID 3004 wrote to memory of 4392	3004	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	84
PID 3004 wrote to memory of 4392	3004	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	84
PID 4392 wrote to memory of 4648	4392	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	90
PID 4392 wrote to memory of 4648	4392	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	90
PID 4392 wrote to memory of 4648	4392	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	90
PID 4648 wrote to memory of 4172	4648	igfxvm32.exe	91
PID 4648 wrote to memory of 4172	4648	igfxvm32.exe	91
PID 4648 wrote to memory of 4172	4648	igfxvm32.exe	91
PID 4648 wrote to memory of 4172	4648	igfxvm32.exe	91
PID 4648 wrote to memory of 4172	4648	igfxvm32.exe	91
PID 4648 wrote to memory of 4172	4648	igfxvm32.exe	91
PID 4648 wrote to memory of 4172	4648	igfxvm32.exe	91
PID 4172 wrote to memory of 3448	4172	igfxvm32.exe	56
PID 4172 wrote to memory of 3448	4172	igfxvm32.exe	56

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3448
- C:\Users\Admin\AppData\Local\Temp\83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
  "C:\Users\Admin\AppData\Local\Temp\83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of UnmapMainImage
  - Suspicious use of WriteProcessMemory
  PID:3004
- - C:\Users\Admin\AppData\Local\Temp\83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
    "C:\Users\Admin\AppData\Local\Temp\83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe"
    3⤵
    - Checks computer location settings
    - Maps connected drives based on registry
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4392
  - - C:\Windows\SysWOW64\igfxvm32.exe
      "C:\Windows\SysWOW64\igfxvm32.exe" C:\Users\Admin\AppData\Local\Temp\83CF4A~1.EXE
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:4648
    - - C:\Windows\SysWOW64\igfxvm32.exe
        
        "C:\Windows\SysWOW64\igfxvm32.exe" C:\Users\Admin\AppData\Local\Temp\83CF4A~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
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:4172

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\igfxvm32.exe

Filesize
140KB

MD5
baa490460067f3deca8bb90217fbfe90

SHA1
80726177d8f02887c2e4bbf72cafa3fe4f640fa2

SHA256
83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8cc

SHA512
8a94b043e48a1c94fa38c02c9e65152b957129b5028be7d48224f3eaae680cd3d1318ec44f1491db4246370c66d36d1c916070bd1faa893b21a1328e48621b4e

Download Submit
memory/4172-44-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/4172-48-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/4172-49-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/4392-0-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/4392-2-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/4392-4-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/4392-3-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/4392-41-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/4392-47-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/4392-46-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads