427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec

Analysis

max time kernel
154s
max time network
186s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
26/11/2022, 00:09

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General

Target

427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec.exe
Size

93KB
MD5

079ba434001a1d9d2425a5a7b18700c9
SHA1

5654f1fb464984098c615d91059e4bd328cec508
SHA256

427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec
SHA512

0ebb562406174c10db1b1c9db1cbb5cb574e133ca803319ebddadafb514a4d614b5e38062688ee3b4b3e0687d9f636fbf1d206587e8f53c5730239d8029e7fc8
SSDEEP

1536:VJLg6/ZRSN0CAk1M4Bgke5GZFVnTh1jjVBFjtSLA/lylHwc:PV/L4081MSZe5GZFVnTh1jj5xlyhL

Score

9^/10

evasion persistence

Malware Config

Signatures

Looks for VirtualBox Guest Additions in registry 2 TTPs 2 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Oracle\VirtualBox Guest Additions	winhlp32.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Oracle\VirtualBox Guest Additions	427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec.exe

Executes dropped EXE 1 IoCs

pid	Process
4580	winhlp32.exe

Looks for VMWare Tools registry key 2 TTPs 2 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware Tools	427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware Tools	winhlp32.exe

Checks BIOS information in registry 2 TTPs 4 IoCs

BIOS 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\SystemBiosVersion	427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	winhlp32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	winhlp32.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\winhlp32.exe = "C:\\Users\\Admin\\AppData\\Roaming\\MSTC-LEXPEXOBM\\winhlp32.exe"	winhlp32.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\winhlp32.exe = "C:\\Users\\Admin\\AppData\\Roaming\\MSTC-LEXPEXOBM\\winhlp32.exe"	427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3188	427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec.exe
Token: SeDebugPrivilege	4580	winhlp32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3188 wrote to memory of 4580	3188	427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec.exe	80
PID 3188 wrote to memory of 4580	3188	427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec.exe	80
PID 3188 wrote to memory of 4580	3188	427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec.exe	80

C:\Users\Admin\AppData\Local\Temp\427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec.exe
"C:\Users\Admin\AppData\Local\Temp\427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec.exe"
1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3188
- C:\Users\Admin\AppData\Roaming\MSTC-LEXPEXOBM\winhlp32.exe
  C:\Users\Admin\AppData\Roaming\MSTC-LEXPEXOBM\winhlp32.exe
  2⤵
  - Looks for VirtualBox Guest Additions in registry
  - Executes dropped EXE
  - Looks for VMWare Tools registry key
  - Checks BIOS information in registry
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  PID:4580

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\MSTC-LEXPEXOBM\winhlp32.exe

Filesize
93KB

MD5
079ba434001a1d9d2425a5a7b18700c9

SHA1
5654f1fb464984098c615d91059e4bd328cec508

SHA256
427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec

SHA512
0ebb562406174c10db1b1c9db1cbb5cb574e133ca803319ebddadafb514a4d614b5e38062688ee3b4b3e0687d9f636fbf1d206587e8f53c5730239d8029e7fc8

Download Submit
C:\Users\Admin\AppData\Roaming\MSTC-LEXPEXOBM\winhlp32.exe

Filesize
93KB

MD5
079ba434001a1d9d2425a5a7b18700c9

SHA1
5654f1fb464984098c615d91059e4bd328cec508

SHA256
427c199c6cbbfff3a02c0f589338756771195f2f7f5b69acede3b3511b6ffdec

SHA512
0ebb562406174c10db1b1c9db1cbb5cb574e133ca803319ebddadafb514a4d614b5e38062688ee3b4b3e0687d9f636fbf1d206587e8f53c5730239d8029e7fc8

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads