c4ce38d1726fe8dfa333c8fa570894424b3e2a3583d75eab9703f68d9361ffb0

Analysis

max time kernel
113s
max time network
112s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17/10/2024, 00:42

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General

Target
c4ce38d1726fe8dfa333c8fa570894424b3e2a3583d75eab9703f68d9361ffb0N.exe
Size 230KB
Sample241017-a2kkbswcpl
SHA256 c4ce38d1726fe8dfa333c8fa570894424b3e2a3583d75eab9703f68d9361ffb0
MD5 419dd4c9c0bc71f42d9cc51111821b60
SHA1 a3482fd1713761374c061d1db26bb03924252bf6
SHA512 5b6e352015ff708bc2ad8dad9f226a908e8ae3960efe6e92b24320c785a6b5f3ff1326e905f7fea19acd17a7549b1d585a5702d71755004a8ef91dbbe6be5841
SSDEEP 6144:6Piynu0cvT2wQc4+T6YWtQSh/iuGkq7L2/zlUMp:6Piynu0cK9g6YWtp7TWSO4
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

bootkit discovery persistence spyware stealer

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
1760	vhcis.exe

Executes dropped EXE 2 IoCs

pid	Process
1760	vhcis.exe
212	mnuuihmkm.exe

Loads dropped DLL 1 IoCs

pid	Process
212	mnuuihmkm.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-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\esf = "c:\\Program Files\\jwuuu\\mnuuihmkm.exe \"c:\\Program Files\\jwuuu\\mnuuihmkm.dll\",EnumSourceFiles"	mnuuihmkm.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)	\??\n:	mnuuihmkm.exe
File opened (read-only)	\??\u:	mnuuihmkm.exe
File opened (read-only)	\??\y:	mnuuihmkm.exe
File opened (read-only)	\??\o:	mnuuihmkm.exe
File opened (read-only)	\??\q:	mnuuihmkm.exe
File opened (read-only)	\??\t:	mnuuihmkm.exe
File opened (read-only)	\??\i:	mnuuihmkm.exe
File opened (read-only)	\??\l:	mnuuihmkm.exe
File opened (read-only)	\??\s:	mnuuihmkm.exe
File opened (read-only)	\??\v:	mnuuihmkm.exe
File opened (read-only)	\??\w:	mnuuihmkm.exe
File opened (read-only)	\??\e:	mnuuihmkm.exe
File opened (read-only)	\??\g:	mnuuihmkm.exe
File opened (read-only)	\??\h:	mnuuihmkm.exe
File opened (read-only)	\??\x:	mnuuihmkm.exe
File opened (read-only)	\??\z:	mnuuihmkm.exe
File opened (read-only)	\??\k:	mnuuihmkm.exe
File opened (read-only)	\??\m:	mnuuihmkm.exe
File opened (read-only)	\??\p:	mnuuihmkm.exe
File opened (read-only)	\??\r:	mnuuihmkm.exe
File opened (read-only)	\??\a:	mnuuihmkm.exe
File opened (read-only)	\??\b:	mnuuihmkm.exe
File opened (read-only)	\??\j:	mnuuihmkm.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	mnuuihmkm.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	\??\c:\Program Files\jwuuu\mnuuihmkm.exe	vhcis.exe
File opened for modification	\??\c:\Program Files\jwuuu\mnuuihmkm.exe	vhcis.exe
File opened for modification	\??\c:\Program Files\jwuuu	vhcis.exe
File created	\??\c:\Program Files\jwuuu\mnuuihmkm.dll	vhcis.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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vhcis.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mnuuihmkm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c4ce38d1726fe8dfa333c8fa570894424b3e2a3583d75eab9703f68d9361ffb0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
1716	cmd.exe
464	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	mnuuihmkm.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	mnuuihmkm.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
464	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
212	mnuuihmkm.exe
212	mnuuihmkm.exe
212	mnuuihmkm.exe
212	mnuuihmkm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	212	mnuuihmkm.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1872	c4ce38d1726fe8dfa333c8fa570894424b3e2a3583d75eab9703f68d9361ffb0N.exe
1760	vhcis.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1872 wrote to memory of 1716	1872	c4ce38d1726fe8dfa333c8fa570894424b3e2a3583d75eab9703f68d9361ffb0N.exe	86
PID 1872 wrote to memory of 1716	1872	c4ce38d1726fe8dfa333c8fa570894424b3e2a3583d75eab9703f68d9361ffb0N.exe	86
PID 1872 wrote to memory of 1716	1872	c4ce38d1726fe8dfa333c8fa570894424b3e2a3583d75eab9703f68d9361ffb0N.exe	86
PID 1716 wrote to memory of 464	1716	cmd.exe	88
PID 1716 wrote to memory of 464	1716	cmd.exe	88
PID 1716 wrote to memory of 464	1716	cmd.exe	88
PID 1716 wrote to memory of 1760	1716	cmd.exe	90
PID 1716 wrote to memory of 1760	1716	cmd.exe	90
PID 1716 wrote to memory of 1760	1716	cmd.exe	90
PID 1760 wrote to memory of 212	1760	vhcis.exe	91
PID 1760 wrote to memory of 212	1760	vhcis.exe	91
PID 1760 wrote to memory of 212	1760	vhcis.exe	91

C:\Users\Admin\AppData\Local\Temp\c4ce38d1726fe8dfa333c8fa570894424b3e2a3583d75eab9703f68d9361ffb0N.exe
"C:\Users\Admin\AppData\Local\Temp\c4ce38d1726fe8dfa333c8fa570894424b3e2a3583d75eab9703f68d9361ffb0N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1872
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\vhcis.exe "C:\Users\Admin\AppData\Local\Temp\c4ce38d1726fe8dfa333c8fa570894424b3e2a3583d75eab9703f68d9361ffb0N.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1716
- - 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:464
- - C:\Users\Admin\AppData\Local\Temp\vhcis.exe
    C:\Users\Admin\AppData\Local\Temp\\vhcis.exe "C:\Users\Admin\AppData\Local\Temp\c4ce38d1726fe8dfa333c8fa570894424b3e2a3583d75eab9703f68d9361ffb0N.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:1760
  - - \??\c:\Program Files\jwuuu\mnuuihmkm.exe
      "c:\Program Files\jwuuu\mnuuihmkm.exe" "c:\Program Files\jwuuu\mnuuihmkm.dll",EnumSourceFiles C:\Users\Admin\AppData\Local\Temp\vhcis.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:212

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

mnuuihmkm.exe

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

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vhcis.exe

Path C:\Users\Admin\AppData\Local\Temp\vhcis.exe
Size 230KB
SHA256 0fcadc1a3e25685ce366503f6c99f01ec267e9ff23c9ee4e6395b31f4855da8b
MD5 29bf6a60045085f25f007815281fa750
SHA1 83791db40f7113d76d22cb246477b2b2797620f8
SHA512 6cdc55a12e34b35ce784eb7c88297bd04ec83ec766413c33b0c200db11282c9a9eeb3a35bc5bd8480b8ce1fde6af6246fe285cd40a4c91cd1342fbee10e862e6
SSDEEP 6144:6Piynu0cvT2wQc4+T6YWtQSh/iuGkq7L2/zlUM5:6Piynu0cK9g6YWtp7TWSOk
MD5 SHA1 SHA512 SSDEEP

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mnuuihmkm.dll

Path \??\c:\Program Files\jwuuu\mnuuihmkm.dll
Size 180KB
SHA256 b203a2cbbc2eda8b6ae588c1d1e2f59eb39297fd261c4de93f75921d48ad2301
MD5 934d96d55b33424ca1ca2920a6b7b8cd
SHA1 4ef50658d97ebc5c84929bbd35cf0741549395b1
SHA512 6ac311c44af3f72fdc1d6f9e2d3d17959064db727d2f3e9b5b61e863850cf3e6543010e5c801647dbe6a82ca0c8755186a9d595c4a0eba1347dbb45bd8894c32
SSDEEP 3072:VLLe0kPzCLQzQQq3+RPLVl+833JBnpfDy47ByLs26m7JVlEGOneZ+qQHVQ3S:VLLTlLQzQQI+hLO8zdy47BkAm7JnEHnx
MD5 SHA1 SHA512 SSDEEP

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memory/212-14-0x0000000010000000-0x0000000010076000-memory.dmp

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memory/212-15-0x0000000010000000-0x0000000010076000-memory.dmp

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memory/212-18-0x0000000010000000-0x0000000010076000-memory.dmp

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memory/1760-10-0x0000000000400000-0x0000000000481C34-memory.dmp

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memory/1872-0-0x0000000000400000-0x0000000000481C34-memory.dmp

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memory/1872-2-0x0000000000400000-0x0000000000481C34-memory.dmp

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