502fea9f0ca9ed33c6c4712668008d242fbe9cb419a7b234f49d0ff3bc4cd15c

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19/10/2024, 06:07

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General

Target
502fea9f0ca9ed33c6c4712668008d242fbe9cb419a7b234f49d0ff3bc4cd15c.exe
Size 200KB
Sample241019-gvs2fstbrr
SHA256 502fea9f0ca9ed33c6c4712668008d242fbe9cb419a7b234f49d0ff3bc4cd15c
MD5 02e6f5e384628af284b8ca6a568448ae
SHA1 639afd7c6e8e744bd9b222e306f5f6841fc99caa
SHA512 89bb59ec2eacdd9978be6a435b9cb1237631f5a685c39e7b76a031c2d805b149c26087ec49aee5e095d704820feb6c4a2427c2d1f836ec45a1e4c726e2b1d7a9
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkT:X2vnSwjaOcADw9cUeCOf
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

bootkit discovery persistence spyware stealer

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
2728	vdwdinws.exe

Executes dropped EXE 2 IoCs

pid	Process
2728	vdwdinws.exe
1972	vcbkxs.exe

Loads dropped DLL 1 IoCs

pid	Process
1972	vcbkxs.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

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\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\mkqtssbi\\vcbkxs.exe \"c:\\Program Files\\mkqtssbi\\vcbkxs.dll\",Compliance"	vcbkxs.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\z:	vcbkxs.exe
File opened (read-only)	\??\g:	vcbkxs.exe
File opened (read-only)	\??\l:	vcbkxs.exe
File opened (read-only)	\??\u:	vcbkxs.exe
File opened (read-only)	\??\n:	vcbkxs.exe
File opened (read-only)	\??\p:	vcbkxs.exe
File opened (read-only)	\??\t:	vcbkxs.exe
File opened (read-only)	\??\a:	vcbkxs.exe
File opened (read-only)	\??\e:	vcbkxs.exe
File opened (read-only)	\??\h:	vcbkxs.exe
File opened (read-only)	\??\y:	vcbkxs.exe
File opened (read-only)	\??\k:	vcbkxs.exe
File opened (read-only)	\??\r:	vcbkxs.exe
File opened (read-only)	\??\s:	vcbkxs.exe
File opened (read-only)	\??\m:	vcbkxs.exe
File opened (read-only)	\??\o:	vcbkxs.exe
File opened (read-only)	\??\q:	vcbkxs.exe
File opened (read-only)	\??\v:	vcbkxs.exe
File opened (read-only)	\??\w:	vcbkxs.exe
File opened (read-only)	\??\b:	vcbkxs.exe
File opened (read-only)	\??\i:	vcbkxs.exe
File opened (read-only)	\??\j:	vcbkxs.exe
File opened (read-only)	\??\x:	vcbkxs.exe

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

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

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	vcbkxs.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\mkqtssbi	vdwdinws.exe
File created	\??\c:\Program Files\mkqtssbi\vcbkxs.dll	vdwdinws.exe
File created	\??\c:\Program Files\mkqtssbi\vcbkxs.exe	vdwdinws.exe
File opened for modification	\??\c:\Program Files\mkqtssbi\vcbkxs.exe	vdwdinws.exe

System Location Discovery: System Language Discovery 1 TTPs 5 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	vdwdinws.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vcbkxs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	502fea9f0ca9ed33c6c4712668008d242fbe9cb419a7b234f49d0ff3bc4cd15c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
3460	cmd.exe
1472	PING.EXE

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	vcbkxs.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	vcbkxs.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1472	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1972	vcbkxs.exe
1972	vcbkxs.exe
1972	vcbkxs.exe
1972	vcbkxs.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1972	vcbkxs.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2648	502fea9f0ca9ed33c6c4712668008d242fbe9cb419a7b234f49d0ff3bc4cd15c.exe
2728	vdwdinws.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2648 wrote to memory of 3460	2648	502fea9f0ca9ed33c6c4712668008d242fbe9cb419a7b234f49d0ff3bc4cd15c.exe	85
PID 2648 wrote to memory of 3460	2648	502fea9f0ca9ed33c6c4712668008d242fbe9cb419a7b234f49d0ff3bc4cd15c.exe	85
PID 2648 wrote to memory of 3460	2648	502fea9f0ca9ed33c6c4712668008d242fbe9cb419a7b234f49d0ff3bc4cd15c.exe	85
PID 3460 wrote to memory of 1472	3460	cmd.exe	87
PID 3460 wrote to memory of 1472	3460	cmd.exe	87
PID 3460 wrote to memory of 1472	3460	cmd.exe	87
PID 3460 wrote to memory of 2728	3460	cmd.exe	90
PID 3460 wrote to memory of 2728	3460	cmd.exe	90
PID 3460 wrote to memory of 2728	3460	cmd.exe	90
PID 2728 wrote to memory of 1972	2728	vdwdinws.exe	91
PID 2728 wrote to memory of 1972	2728	vdwdinws.exe	91
PID 2728 wrote to memory of 1972	2728	vdwdinws.exe	91

C:\Users\Admin\AppData\Local\Temp\502fea9f0ca9ed33c6c4712668008d242fbe9cb419a7b234f49d0ff3bc4cd15c.exe
"C:\Users\Admin\AppData\Local\Temp\502fea9f0ca9ed33c6c4712668008d242fbe9cb419a7b234f49d0ff3bc4cd15c.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2648
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\vdwdinws.exe "C:\Users\Admin\AppData\Local\Temp\502fea9f0ca9ed33c6c4712668008d242fbe9cb419a7b234f49d0ff3bc4cd15c.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3460
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1472
- - C:\Users\Admin\AppData\Local\Temp\vdwdinws.exe
    C:\Users\Admin\AppData\Local\Temp\\vdwdinws.exe "C:\Users\Admin\AppData\Local\Temp\502fea9f0ca9ed33c6c4712668008d242fbe9cb419a7b234f49d0ff3bc4cd15c.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2728
  - - \??\c:\Program Files\mkqtssbi\vcbkxs.exe
      "c:\Program Files\mkqtssbi\vcbkxs.exe" "c:\Program Files\mkqtssbi\vcbkxs.dll",Compliance C:\Users\Admin\AppData\Local\Temp\vdwdinws.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1972

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

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

vcbkxs.exe

Path C:\Program Files\mkqtssbi\vcbkxs.exe
Size 60KB
SHA256 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
MD5 889b99c52a60dd49227c5e485a016679
SHA1 8fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA512 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641
SSDEEP 1536:H9ykYCTdiHQKrFXmw2RQln5IUmDjoX6+:HlMHprF2nRQln5I
MD5 SHA1 SHA512 SSDEEP

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vdwdinws.exe

Path C:\Users\Admin\AppData\Local\Temp\vdwdinws.exe
Size 200KB
SHA256 9ee1907525278071f22293fe7f831ff5dd64f385fa0f103f02c59d491c294bdd
MD5 3ed29eb58860cf6cb5b0cc4efb9ad45e
SHA1 034cdc5b53e244b616374135bd6ed964d9609a3a
SHA512 ffb5d0d5c8737d981237c54f941d1b7b349ac73c4be3214d87ff17c66a1d1052c94ee8fd9ca12192e319a522818a7111764a29b2377fb5be6045a73ebc5c12a7
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkT:X2vnSwjaOcADw9cUeCOf
MD5 SHA1 SHA512 SSDEEP

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vcbkxs.dll

Path \??\c:\Program Files\mkqtssbi\vcbkxs.dll
Size 141KB
SHA256 511a18f88649d821e7956a7ba2fa5aa854c2c66bb08fc8e826c815b967980181
MD5 fb4c5265c1868d3bfeafaf31779f448f
SHA1 d972be3a4334588ce27b6b1cb6c1d8c9837ab4b6
SHA512 1f2549c7f2613fb4ffd3f9f6cf40fc9fa8f2058ab8c273e93f18476acf5e918d0d71e9d91fef799963eca2af5c820a3486e284f3bbefad01906d5d19b5cc4227
SSDEEP 3072:RGmRmNJToTJfp2D1QzpSyiJEkGSPf1bc4lT:RGMmfToTJY6zpSyvkGSn1tlT
MD5 SHA1 SHA512 SSDEEP

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memory/1972-25-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/1972-21-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/1972-19-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2648-4-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2648-0-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2648-1-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2648-2-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2728-9-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2728-16-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2728-8-0x0000000000400000-0x000000000044901D-memory.dmp

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