dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b

General

Target

dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe
Size

13.1MB
MD5

364045dcd335ffd17f48a8cf5f816a01
SHA1

e9484d6300ce1d921c70ba7c08d4bb5b79f7a8c3
SHA256

dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b
SHA512

84b719101392c9dc6fc0d0665dd5fdca2627d2f302402bc2d475a4a9fc398acd2f8384c8d3b7a5a4e012b9007a3256557a957da75948b6cff07a0ceda69b2013
SSDEEP

196608:t1cCA+KNn9QK7FQZDJLla35CKFdu9CwJsv6t0KAnag:t1cDPQca1JA3YKFdu9CwJsv6ti1

Score

6^/10

bootkit discovery persistence

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	cpuz.exe

Checks computer location settings 2 TTPs 3 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-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	cpu-z.tmp
Key value queried	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\CPU-Z\cpu-z.exe	dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe
File created	C:\Program Files\CPUID\CPU-Z\unins000.dat	cpu-z.tmp
File created	C:\Program Files\CPUID\CPU-Z\is-5JMHO.tmp	cpu-z.tmp
File opened for modification	C:\Program Files\CPUID\CPU-Z\cpuz.exe	cpu-z.tmp
File created	C:\Program Files\CPUID\CPU-Z\is-FIA8G.tmp	cpu-z.tmp
File created	C:\Program Files\CPUID\CPU-Z\is-IAD58.tmp	cpu-z.tmp
File created	C:\Program Files\CPUID\CPU-Z\is-SO40U.tmp	cpu-z.tmp
File created	C:\Program Files\CPUID\CPU-Z\is-BBREJ.tmp	cpu-z.tmp
File opened for modification	C:\Program Files\CPUID\CPU-Z\unins000.dat	cpu-z.tmp

Executes dropped EXE 4 IoCs

pid	Process
3732	cpu-z.exe
2540	cpu-z.tmp
1476	_setup64.tmp
4016	cpuz.exe

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

System Information Discovery
T1082

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	dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cpu-z.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cpu-z.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NOTEPAD.EXE

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000_Classes\Local Settings	cpu-z.tmp

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
4784	dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe
4936	dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2540	cpu-z.tmp
2540	cpu-z.tmp
4016	cpuz.exe
4016	cpuz.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
656	Process not Found

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeLoadDriverPrivilege	4016	cpuz.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2540	cpu-z.tmp

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4016	cpuz.exe
4016	cpuz.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4784 wrote to memory of 4936	4784	dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe	86
PID 4784 wrote to memory of 4936	4784	dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe	86
PID 4784 wrote to memory of 4936	4784	dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe	86
PID 4936 wrote to memory of 3732	4936	dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe	90
PID 4936 wrote to memory of 3732	4936	dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe	90
PID 4936 wrote to memory of 3732	4936	dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe	90
PID 3732 wrote to memory of 2540	3732	cpu-z.exe	91
PID 3732 wrote to memory of 2540	3732	cpu-z.exe	91
PID 3732 wrote to memory of 2540	3732	cpu-z.exe	91
PID 2540 wrote to memory of 1476	2540	cpu-z.tmp	99
PID 2540 wrote to memory of 1476	2540	cpu-z.tmp	99
PID 2540 wrote to memory of 4892	2540	cpu-z.tmp	103
PID 2540 wrote to memory of 4892	2540	cpu-z.tmp	103
PID 2540 wrote to memory of 4892	2540	cpu-z.tmp	103

C:\Users\Admin\AppData\Local\Temp\dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe
"C:\Users\Admin\AppData\Local\Temp\dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of WriteProcessMemory
PID:4784
- C:\Users\Admin\AppData\Local\Temp\dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe
  "C:\Users\Admin\AppData\Local\Temp\dc5b6ebcf502935ed2c0b4258eb13ff403efc8b97fe562e96a3dc1c7451db76b.exe" -kross
  2⤵
  - Checks computer location settings
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of WriteProcessMemory
  PID:4936
- - C:\Program Files (x86)\CPU-Z\cpu-z.exe
    "C:\Program Files (x86)\CPU-Z\cpu-z.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3732
  - - C:\Users\Admin\AppData\Local\Temp\is-U2STB.tmp\cpu-z.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-U2STB.tmp\cpu-z.tmp" /SL5="$C029A,1839111,58368,C:\Program Files (x86)\CPU-Z\cpu-z.exe"
      4⤵
      Checks computer location settings
      Drops file in Program Files directory
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Modifies registry class
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of FindShellTrayWindow
      Suspicious use of WriteProcessMemory
      PID:2540
    - - C:\Users\Admin\AppData\Local\Temp\is-PRP4A.tmp\_isetup\_setup64.tmp
        
        helper 105 0x440
        5⤵
        Executes dropped EXE
        
        PID:1476
    - - C:\Windows\SysWOW64\NOTEPAD.EXE
        
        "C:\Windows\system32\NOTEPAD.EXE" C:\Program Files\CPUID\CPU-Z\cpuz_readme.txt
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:4892

C:\Program Files\CPUID\CPU-Z\cpuz.exe
"C:\Program Files\CPUID\CPU-Z\cpuz.exe"
1⤵
- Writes to the Master Boot Record (MBR)
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4016

Network

MITRE ATT&CK Enterprise v15

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

Query Registry

2

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\CPU-Z\cpu-z.exe

Filesize
2.0MB

MD5
da384563c4cf8f233e4c3efce5f63b7a

SHA1
d08290a7324b31da38b2142d7f96a671a12c481e

SHA256
7d3d1df736ca8aa96edcf37ffa3d0c992f5c2015cf2aef8c805c02729e87161f

SHA512
7651b20a5d3dff7e749300d367d3f88e69e20892580aeff52f934d07c3db6dc72b00729a35ce44592fcd9c359a813d2448daae6fd91c610f2f34ed59435b89f1

Download Submit
C:\Program Files\CPUID\CPU-Z\cpuz.exe

Filesize
4.2MB

MD5
8a37e1600d7668a7621af5380494d11d

SHA1
411a9e934c0c8b618acfa764ea2002dc3d930a91

SHA256
d56ef91bd3ef090b58ef818825382227dade2c692e98efebc65657880f0406e5

SHA512
e0c310b02e5ef3f9f2997d41cd1e2d32a08edaf4c366daffdc3e1fdc99ec1de4caf0070f390cbcbf6c905f153e3cd1946932b1ff17e20c6f32cfc1b842290e9f

Download Submit
C:\Program Files\CPUID\CPU-Z\cpuz.ini

Filesize
528B

MD5
6bd9e57b13f964bc2ab258e10cd93709

SHA1
a42bd7543149aa8e88562f1e39781c2f1a390e26

SHA256
fe12fe279be5c03e7d162fbea0be831370896712b015d1d7df415cf87be6dda9

SHA512
f50b5bc48a3cbe8de0ddb4713db49e579e248b9260c7e5482e65c7878b7df8666c19872c2b647f8a5b6401aa3ca13e8ce51207535a1e8325dded71a3d4a5015f

Download Submit
C:\Program Files\CPUID\CPU-Z\cpuz_readme.txt

Filesize
30KB

MD5
55d7017bf0f28d09f20bf331eb8e608a

SHA1
5d7d5f5e75abbd20fa32a674113591c9aeb89a02

SHA256
b01b7bf643fc24ecb32ce3af039c8f30a24f7e20ffc0ed61e293b20b499d5f28

SHA512
55dda08b664067c3ba396f3ffec625779d4fe2489b321119927b97843096c3de74a664d84330bf9ca1132c6f27726fe2cad474bf5565871c274710bd5271bf9f

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-PRP4A.tmp\_isetup\_setup64.tmp

Filesize
6KB

MD5
e4211d6d009757c078a9fac7ff4f03d4

SHA1
019cd56ba687d39d12d4b13991c9a42ea6ba03da

SHA256
388a796580234efc95f3b1c70ad4cb44bfddc7ba0f9203bf4902b9929b136f95

SHA512
17257f15d843e88bb78adcfb48184b8ce22109cc2c99e709432728a392afae7b808ed32289ba397207172de990a354f15c2459b6797317da8ea18b040c85787e

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-U2STB.tmp\cpu-z.tmp

Filesize
702KB

MD5
1afbd25db5c9a90fe05309f7c4fbcf09

SHA1
baf330b5c249ca925b4ea19a52fe8b2c27e547fa

SHA256
3bb0ee5569fe5453c6b3fa25aa517b925d4f8d1f7ba3475e58fa09c46290658c

SHA512
3a448f06862c6d163fd58b68b836d866ae513e04a69774abf5a0c5b7df74f5b9ee37240083760185618c5068bf93e7fd812e76b3e530639111fb1d74f4d28419

Download Submit
C:\Windows\Temp\cpuz_driver_4016.log

Filesize
428B

MD5
876a62078ba53cfefb275df4a6efbcaa

SHA1
72540e320fda02ce0bb81fd3c7f73167b197a46c

SHA256
8a4a07197e899295e7172bf370ef786b58e808ad161a8f08a84b03498f83c453

SHA512
7e8bf7b088e73303c7cef79e00dfdf32f7d2d78c7d0a1e932ac844e79ddcb1bc7be681cbc441875d5a7ff6ee96aaf2c2a4d6283d2916c36c55efbfbfc8cc4356

Download Submit
memory/2540-18-0x0000000000400000-0x00000000004BF000-memory.dmp

Filesize
764KB

Download
memory/2540-50-0x0000000000400000-0x00000000004BF000-memory.dmp

Filesize
764KB

Download
memory/3732-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3732-17-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3732-51-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads