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 4 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\AuthorizedApplications\List	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
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

Deletes itself 1 IoCs

pid	Process
2500	igfxvm32.exe

Executes dropped EXE 2 IoCs

pid	Process
2920	igfxvm32.exe
2500	igfxvm32.exe

Loads dropped DLL 3 IoCs

pid	Process
2532	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
2532	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
2920	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 2100 set thread context of 2532	2100	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	30
PID 2920 set thread context of 2500	2920	igfxvm32.exe	32

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2532-3-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/2532-2-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/2532-8-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/2532-9-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/2532-7-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/2532-6-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/2532-4-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/2532-32-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/2500-34-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/2500-38-0x0000000000400000-0x000000000044C000-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	igfxvm32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2532	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
2532	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
2500	igfxvm32.exe
2500	igfxvm32.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 2532	2100	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	30
PID 2100 wrote to memory of 2532	2100	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	30
PID 2100 wrote to memory of 2532	2100	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	30
PID 2100 wrote to memory of 2532	2100	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	30
PID 2100 wrote to memory of 2532	2100	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	30
PID 2100 wrote to memory of 2532	2100	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	30
PID 2100 wrote to memory of 2532	2100	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	30
PID 2532 wrote to memory of 2920	2532	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	31
PID 2532 wrote to memory of 2920	2532	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	31
PID 2532 wrote to memory of 2920	2532	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	31
PID 2532 wrote to memory of 2920	2532	83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe	31
PID 2920 wrote to memory of 2500	2920	igfxvm32.exe	32
PID 2920 wrote to memory of 2500	2920	igfxvm32.exe	32
PID 2920 wrote to memory of 2500	2920	igfxvm32.exe	32
PID 2920 wrote to memory of 2500	2920	igfxvm32.exe	32
PID 2920 wrote to memory of 2500	2920	igfxvm32.exe	32
PID 2920 wrote to memory of 2500	2920	igfxvm32.exe	32
PID 2920 wrote to memory of 2500	2920	igfxvm32.exe	32
PID 2500 wrote to memory of 1188	2500	igfxvm32.exe	21
PID 2500 wrote to memory of 1188	2500	igfxvm32.exe	21

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1188
- 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 WriteProcessMemory
  PID:2100
- - C:\Users\Admin\AppData\Local\Temp\83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe
    "C:\Users\Admin\AppData\Local\Temp\83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8ccN.exe"
    3⤵
    - Loads dropped DLL
    - 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:2532
  - - C:\Windows\SysWOW64\igfxvm32.exe
      "C:\Windows\SysWOW64\igfxvm32.exe" C:\Users\Admin\AppData\Local\Temp\83CF4A~1.EXE
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2920
    - - 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:2500

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

2

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

\Windows\SysWOW64\igfxvm32.exe

Filesize
140KB

MD5
baa490460067f3deca8bb90217fbfe90

SHA1
80726177d8f02887c2e4bbf72cafa3fe4f640fa2

SHA256
83cf4a1aa4a64bbe63aca52cefdbd0c311cf804c065353dd69dce889153dd8cc

SHA512
8a94b043e48a1c94fa38c02c9e65152b957129b5028be7d48224f3eaae680cd3d1318ec44f1491db4246370c66d36d1c916070bd1faa893b21a1328e48621b4e

Download Submit
memory/1188-37-0x0000000002D30000-0x0000000002D31000-memory.dmp

Filesize
4KB

Download
memory/1188-35-0x0000000002D10000-0x0000000002D2E000-memory.dmp

Filesize
120KB

Download
memory/2500-38-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2500-34-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2532-6-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2532-0-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2532-4-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2532-7-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2532-32-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2532-9-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2532-8-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2532-2-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2532-3-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads