6263705fa2ad84d689afe23e92ebe14f5113a93f50b07b48669e12f2ac21dc6f

General

Target
引导锁/引导锁_upx打包.exe
Size 91KB
Sample260510-eav9zagy4s
SHA256 6263705fa2ad84d689afe23e92ebe14f5113a93f50b07b48669e12f2ac21dc6f
MD5 d5e5fe41649ed677897f22f09488fbc7
SHA1 51fcbddae23f3e596f00091048cbac4e51759b78
SHA512 401b8b7ab63f874a0f759ec133e2d68a574fbcf0c731d7ed6574509b92b7d83dfc8f3ce5b752b988aed2941d6eae2950635001e5ce6598cad16d1c5e22415096
SSDEEP 1536:/ly30Ch56ViMz0kuvOelvvEjCeQcLHqZhDQ7c4IS0JzgyObtDo76H:/I0igowuvOelsq742zh2CI
TLSH
T1E99302B3B826D81FFC9252B7055C9F59900DC8AF47F90D06645838CFEE53E59A589382
MD5 SHA1 SHA512 SSDEEP TLSH

Score

6^/10

bootkit discovery persistence upx

Malware Config

Signatures

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	引导锁_upx打包.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\UsrClass.dat.backup	引导锁_upx打包.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\UsrClass.dat.backup	引导锁_upx打包.exe
File created	C:\Windows\SysWOW64\lockmsg.txt	引导锁_upx打包.exe
File created	C:\Windows\SysWOW64\recovery.bat	引导锁_upx打包.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral4/memory/2852-0-0x0000000000ED0000-0x0000000000F0C000-memory.dmp	upx
behavioral4/memory/2852-7-0x0000000000ED0000-0x0000000000F0C000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 6 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	引导锁_upx打包.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2852	引导锁_upx打包.exe
2852	引导锁_upx打包.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2852	引导锁_upx打包.exe
Token: SeTcbPrivilege	2852	引导锁_upx打包.exe
Token: SeBackupPrivilege	2852	引导锁_upx打包.exe
Token: SeRestorePrivilege	2852	引导锁_upx打包.exe
Token: SeShutdownPrivilege	2852	引导锁_upx打包.exe
Token: SeLoadDriverPrivilege	2852	引导锁_upx打包.exe
Token: SeShutdownPrivilege	2852	引导锁_upx打包.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2852 wrote to memory of 5180	2852	引导锁_upx打包.exe	80
PID 2852 wrote to memory of 5336	2852	引导锁_upx打包.exe	81
PID 2852 wrote to memory of 1916	2852	引导锁_upx打包.exe	82
PID 2852 wrote to memory of 1852	2852	引导锁_upx打包.exe	83
PID 2852 wrote to memory of 1012	2852	引导锁_upx打包.exe	84

C:\Users\Admin\AppData\Local\Temp\引导锁\引导锁_upx打包.exe
"C:\Users\Admin\AppData\Local\Temp\引导锁\引导锁_upx打包.exe"
1⤵
- Writes to the Master Boot Record (MBR)
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2852
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c bcdedit /create {lock} /d "Disk Lock" /application bootsector
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5180
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c bcdedit /set {lock} device partition=C:
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5336
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c bcdedit /set {lock} path \lock.bin
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1916
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c bcdedit /displayorder {lock} /addfirst
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1852
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c bcdedit /timeout 1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1012

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Windows\SysWOW64\recovery.bat
1⤵
PID:5388

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

recovery.bat

Path C:\Windows\SysWOW64\recovery.bat
Size 318B
SHA256 7b23173e987f6f030158c51d47543c5dc11ad54ae47bd2fd56c7783e380e1fb0
MD5 6135bd6872ff535396b67ac27c671463
SHA1 8b0fc1761a10ba8de045eb4d6e81863573b9e4ab
SHA512 467663401aea4c45ec134a9172aca1b8dbdb450a681dd5d2c2a36bacfa2151e2d065d12e83192797e3fdebae7d5b2f86d98a451bc651a677458028870de24e8e
TLSH
T1E9E0726696A61CE2C078CDB26C02CA81EF0DE883230431CC3363FA885F3C110CC3C2A0
MD5 SHA1 SHA512 TLSH

Submit Download

memory/2852-0-0x0000000000ED0000-0x0000000000F0C000-memory.dmp

Download

memory/2852-7-0x0000000000ED0000-0x0000000000F0C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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