metasploit | d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710

General

Target

d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe
Size

224KB
MD5

0d49ab9ea970a3146b43d7a8b738387d
SHA1

bf833829fa6a07af50f00fa3d66a457cf5d778ad
SHA256

d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710
SHA512

a3cfbb99d7a305cae7d6cbc983ccc74642d1530918e2b781a9a844aee46bee6ff40bb6cfab8d6d63d37e6c339a8c0122361649fb710740f2b9fd0848ac63aac3
SSDEEP

6144:fv8aWfVbAxePJkl6zUzMtWWuguGLDGlhHmAKMa/DLy/:MaQAxePJBz3W76IKMabU

Score

10^/10

metasploit backdoor bootkit 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

Executes dropped EXE 2 IoCs

pid	Process
1352	regsrv42.exe
4816	regsrv42.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/512-135-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/512-137-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/512-138-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/512-139-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/4816-152-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/512-153-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/4816-154-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/4816-156-0x0000000000400000-0x0000000000467000-memory.dmp	upx

Checks computer location settings 2 TTPs 4 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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	regsrv42.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	regsrv42.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	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	regsrv42.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	regsrv42.exe

Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1067

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe
File opened for modification	\??\PhysicalDrive0	regsrv42.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\regsrv42.exe	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe
File opened for modification	C:\Windows\SysWOW64\	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe
File opened for modification	C:\Windows\SysWOW64\regsrv42.exe	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2316 set thread context of 512	2316	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe	80
PID 1352 set thread context of 4816	1352	regsrv42.exe	83

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

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\	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
512	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe
512	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe
512	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe
512	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe
4816	regsrv42.exe
4816	regsrv42.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	4816	regsrv42.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2316	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe
1352	regsrv42.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2316 wrote to memory of 512	2316	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe	80
PID 2316 wrote to memory of 512	2316	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe	80
PID 2316 wrote to memory of 512	2316	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe	80
PID 2316 wrote to memory of 512	2316	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe	80
PID 2316 wrote to memory of 512	2316	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe	80
PID 2316 wrote to memory of 512	2316	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe	80
PID 2316 wrote to memory of 512	2316	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe	80
PID 2316 wrote to memory of 512	2316	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe	80
PID 512 wrote to memory of 1352	512	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe	82
PID 512 wrote to memory of 1352	512	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe	82
PID 512 wrote to memory of 1352	512	d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe	82
PID 1352 wrote to memory of 4816	1352	regsrv42.exe	83
PID 1352 wrote to memory of 4816	1352	regsrv42.exe	83
PID 1352 wrote to memory of 4816	1352	regsrv42.exe	83
PID 1352 wrote to memory of 4816	1352	regsrv42.exe	83
PID 1352 wrote to memory of 4816	1352	regsrv42.exe	83
PID 1352 wrote to memory of 4816	1352	regsrv42.exe	83
PID 1352 wrote to memory of 4816	1352	regsrv42.exe	83
PID 1352 wrote to memory of 4816	1352	regsrv42.exe	83
PID 4816 wrote to memory of 1732	4816	regsrv42.exe	84
PID 4816 wrote to memory of 1732	4816	regsrv42.exe	84
PID 4816 wrote to memory of 1732	4816	regsrv42.exe	84

C:\Users\Admin\AppData\Local\Temp\d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe
"C:\Users\Admin\AppData\Local\Temp\d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe"
1⤵
- Checks computer location settings
- Writes to the Master Boot Record (MBR)
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2316
- C:\Users\Admin\AppData\Local\Temp\d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe
  C:\Users\Admin\AppData\Local\Temp\d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710.exe
  2⤵
  - 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:512
- - C:\Windows\SysWOW64\regsrv42.exe
    "C:\Windows\system32\regsrv42.exe" C:\Users\Admin\AppData\Local\Temp\D3A4AA~1.EXE
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Writes to the Master Boot Record (MBR)
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1352
  - - C:\Windows\SysWOW64\regsrv42.exe
      C:\Windows\SysWOW64\regsrv42.exe
      4⤵
      Executes dropped EXE
      Checks computer location settings
      Maps connected drives based on registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:4816
    - - C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\system32\cmd.exe" /c del C:\Windows\SysWOW64\regsrv42.exe > nul
        5⤵
        
        PID:1732

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

1

T1067

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\drwebupdate.exe

Filesize
1KB

MD5
5343c1a8b203c162a3bf3870d9f50fd4

SHA1
04b5b886c20d88b57eea6d8ff882624a4ac1e51d

SHA256
dc1d54dab6ec8c00f70137927504e4f222c8395f10760b6beecfcfa94e08249f

SHA512
e0f50acb6061744e825a4051765cebf23e8c489b55b190739409d8a79bb08dac8f919247a4e5f65a015ea9c57d326bbef7ea045163915129e01f316c4958d949

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-2629973501-4017243118-3254762364-1000\699c4b9cdebca7aaea5193cae8a50098_e32e1c79-b88e-4709-94fb-81034ca3398e

Filesize
50B

MD5
5b63d4dd8c04c88c0e30e494ec6a609a

SHA1
884d5a8bdc25fe794dc22ef9518009dcf0069d09

SHA256
4d93c22555b3169e5c13716ca59b8b22892c69b3025aea841afe5259698102fd

SHA512
15ff8551ac6b9de978050569bcdc26f44dfc06a0eaf445ac70fd45453a21bdafa3e4c8b4857d6a1c3226f4102a639682bdfb71d7b255062fb81a51c9126896cb

Download Submit
C:\Windows\SysWOW64\regsrv42.exe

Filesize
224KB

MD5
0d49ab9ea970a3146b43d7a8b738387d

SHA1
bf833829fa6a07af50f00fa3d66a457cf5d778ad

SHA256
d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710

SHA512
a3cfbb99d7a305cae7d6cbc983ccc74642d1530918e2b781a9a844aee46bee6ff40bb6cfab8d6d63d37e6c339a8c0122361649fb710740f2b9fd0848ac63aac3

Download Submit
C:\Windows\SysWOW64\regsrv42.exe

Filesize
224KB

MD5
0d49ab9ea970a3146b43d7a8b738387d

SHA1
bf833829fa6a07af50f00fa3d66a457cf5d778ad

SHA256
d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710

SHA512
a3cfbb99d7a305cae7d6cbc983ccc74642d1530918e2b781a9a844aee46bee6ff40bb6cfab8d6d63d37e6c339a8c0122361649fb710740f2b9fd0848ac63aac3

Download Submit
C:\Windows\SysWOW64\regsrv42.exe

Filesize
224KB

MD5
0d49ab9ea970a3146b43d7a8b738387d

SHA1
bf833829fa6a07af50f00fa3d66a457cf5d778ad

SHA256
d3a4aa64e9e293da875922d32b3319cd732f1b555e1e58d6399d2977f179b710

SHA512
a3cfbb99d7a305cae7d6cbc983ccc74642d1530918e2b781a9a844aee46bee6ff40bb6cfab8d6d63d37e6c339a8c0122361649fb710740f2b9fd0848ac63aac3

Download Submit
memory/512-139-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/512-134-0x0000000000000000-mapping.dmp

Download
memory/512-138-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/512-137-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/512-153-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/512-135-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/1352-140-0x0000000000000000-mapping.dmp

Download
memory/1732-155-0x0000000000000000-mapping.dmp

Download
memory/4816-146-0x0000000000000000-mapping.dmp

Download
memory/4816-152-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/4816-154-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/4816-156-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads