c1aeab35f61f12db28274d82713bff400b808625854a18e49504022f92805e31

Analysis

user interaction
yes
max time kernel
17s
max time network
18s
platform
windows10-ltsc_2021_x64
resource
win10ltsc2021-20260513-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
submitted
09/08/2026, 04:57

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General

Target
PEEKABOO.exe
Size 921KB
Sample260809-flexsstzav
SHA256 c1aeab35f61f12db28274d82713bff400b808625854a18e49504022f92805e31
MD5 d0ae6aea701de9f127f91e7efdb50252
SHA1 cb9ef64cbcb999372fb4046e99fe89a03df9bc81
SHA512 505d11808e9923ff0ec1a51acd51509711f8c5c42da81b47a97249954b06f6f45ddda4655446daeb7f231785cd484ebc6e9ada92b857ad3a8d7ce04276536f13
SSDEEP 24576:lCFZOZHLhrN+f4SULfWyBPzB8JAk4cQATb:oF+LL+fIWybB8
TLSH
T15915339832772A1FC8E73B37E5E739A463AE323D1936215C04A5F37D1E415C05726EA2
MD5 SHA1 SHA512 SSDEEP TLSH

Score

8^/10

bootkit defense_evasion discovery persistence

Malware Config

Signatures

Disables Task Manager via registry modification
defense_evasion

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-1-5-21-4146128427-3460078792-3629963422-1000\Control Panel\International\Geo\Nation	PEEKABOO.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4146128427-3460078792-3629963422-1000\Control Panel\International\Geo\Nation	MBR2.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4146128427-3460078792-3629963422-1000\Control Panel\International\Geo\Nation	MatrixMBR.exe

Executes dropped EXE 6 IoCs

pid	Process
4384	MBR2.exe
872	TROLL5.exe
4500	TROLL2.exe
448	MatrixMBR.exe
3980	GDI.exe
4508	MBR.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	MBR.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\System32\MatrixMBR.exe	MBR2.exe
File opened for modification	C:\Windows\System32\MatrixMBR.exe	MBR2.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 4 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	MBR.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	TROLL5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	TROLL2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	GDI.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeShutdownPrivilege	4508	MBR.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2060 wrote to memory of 4384	2060	PEEKABOO.exe	83
PID 2060 wrote to memory of 872	2060	PEEKABOO.exe	84
PID 2060 wrote to memory of 4500	2060	PEEKABOO.exe	85
PID 4384 wrote to memory of 448	4384	MBR2.exe	87
PID 448 wrote to memory of 3980	448	MatrixMBR.exe	88
PID 448 wrote to memory of 4508	448	MatrixMBR.exe	89

C:\Users\Admin\AppData\Local\Temp\PEEKABOO.exe
"C:\Users\Admin\AppData\Local\Temp\PEEKABOO.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2060
- C:\Users\Admin\AppData\Local\Temp\MBR2.exe
  "C:\Users\Admin\AppData\Local\Temp\MBR2.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:4384
- - C:\Windows\System32\MatrixMBR.exe
    "C:\Windows\System32\MatrixMBR.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:448
  - - C:\Users\Admin\AppData\Local\Temp\GDI.exe
      "C:\Users\Admin\AppData\Local\Temp\GDI.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:3980
  - - C:\Users\Admin\AppData\Local\Temp\MBR.exe
      "C:\Users\Admin\AppData\Local\Temp\MBR.exe"
      4⤵
      Executes dropped EXE
      Writes to the Master Boot Record (MBR)
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:4508
- C:\Users\Admin\AppData\Local\Temp\TROLL5.exe
  "C:\Users\Admin\AppData\Local\Temp\TROLL5.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:872
- C:\Users\Admin\AppData\Local\Temp\TROLL2.exe
  "C:\Users\Admin\AppData\Local\Temp\TROLL2.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4500

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x314 0x310
1⤵
PID:2656

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

GDI.exe

Path C:\Users\Admin\AppData\Local\Temp\GDI.exe
Size 11KB
SHA256 e153def894c867923dd56a7025b7b0b7bd3ee37c801a5957201d39f999bb28bf
MD5 c08ae6d9c6ecd7e13f827bf68767785f
SHA1 e71c2ec8d00c1e82b8b07baee0688b0a28604454
SHA512 c28bbe8abc66ad2433e5a3b93a4601b28225e86cb4bff077fd3224adfa63164bebfa3002a42b1cb4cb3c7ccad0208f8b143b8a17099bea04fcb964e667c7a1c0
SSDEEP 192:99qzCdTRiOurQItQ6YTkMfTiC96Tp80/Yc/75e:PXdTROQItQTTka2O6Tp3/Yc/g
TLSH
T1B432191197D08276ED320AB278A35742CB77EB57D967DABE348C912BBF732014293361
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

MBR.exe

Path C:\Users\Admin\AppData\Local\Temp\MBR.exe
Size 93KB
SHA256 acddde9514e3b9d5c40b3d1750af5f4187c99f8987b027d6da44fb6bcf79b3ca
MD5 d2fc66cf781a2497fceb4041a93cc676
SHA1 480b1aa31b0b31fc0e0833afbba06533ab9a90ee
SHA512 6c4cb42f786301be7614d4cb0b32601fea151351b0877e2371632435eb2c54bd4cd04d6b23bf4f49017ccaf679331162aac7329a1ed2409e3c2e02d0326e3487
SSDEEP 1536:CmwoXyoci5SjY3SaRO7IPqifrJxdhGZCJjmGasWhQcdQ5/hO2oFaLJ:Tv5MYRIMPqiTJx+ZqreRQ5/hXoM9
TLSH
T10A936C43B5D28CB2E5B21D311875CAA15A2FB9214E348E6B6794137E1F340D09E36FB7
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

MBR2.exe

Path C:\Users\Admin\AppData\Local\Temp\MBR2.exe
Size 205KB
SHA256 c22e2419f04fe03a92255a139ca8814697962e86d191a1d4171788fd0c903f68
MD5 3dc0e225f886bae3b655cd9d738ed32f
SHA1 abda127fd477bd9d051cd57b16ac13f44030a9ae
SHA512 c8a6c0bfa96defde6f83d847583ff2ec065a43f80f9886259a2d1fe7df306ef6ed7aeed61b7dcf0bdc111fc67419eb66cf1ca44e831711dd4ea7d25ed9aed09b
SSDEEP 3072:VQKrqi3qqKcjzksuicc/9Ic9hwBjQV8xWegUqijR4uTkEJxIiLt2p/YkMhapu4n4:Vruc/iuwBMV8x5gUqMR4aMiLcpj84
TLSH
T1D92423001754132EFB59C0F6019712B381EBD3AE9E1B9489F3F9921BDB6B10ED91747A
MD5 SHA1 SHA512 SSDEEP TLSH

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TROLL2.exe

Path C:\Users\Admin\AppData\Local\Temp\TROLL2.exe
Size 105KB
SHA256 dcdf5140bc51db27f3aec80ae9a66a57aad446a2522904d288770e8d8cde8cee
MD5 52a2a5517deb1a06896891a35299ce20
SHA1 badcbdfef312bd71de997a7416ee20cee5d66af6
SHA512 7cb0de412c0508f5af522aeaf3731dda418f72f7cae8dd3f21b34d5cdbc08f9dea8699d59878610496c68d687227a0269739221490d70d03b8e4b84dfd29d5f1
SSDEEP 1536:A85iT6EcrYTyyAmOvu3yUyJCbT4UK7BIR:IGEcxyAF64A
TLSH
T1D6B3F6D7BE8AADA3F925133989F98319033DF7C01B828B171D31993A17176A17FC5246
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

TROLL5.exe

Path C:\Users\Admin\AppData\Local\Temp\TROLL5.exe
Size 712KB
SHA256 79f00c7dab0891824136539fabd542c74e26cbed94b9add3f1aa7f793d653de6
MD5 542a4e400ff233b21a1a3c27751ac783
SHA1 000a67f00b0003531d65a6ed6f16488ae5dcd0fe
SHA512 8335118ca0c268635d9495b331fb65800a32a0631f132cd34ce84ca3b523d0a9e23eee6d76539d0c81d86fda534da56c936914012d8bad35040b15cc8caaf645
SSDEEP 12288:cF04yK+m1Vd5IfbJQWYzBVXqKWOF+LmguP/WMYZCubHKG91MiYwd:Z4yedWfEHnWbLunWMYUaHzLY2
TLSH
T1BDF423738484A51CD6EFCE33A0F1FC3463BAFE2761198C112294EDD46AA715097CBB65
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

MatrixMBR.exe

Path C:\Windows\System32\MatrixMBR.exe
Size 250KB
SHA256 339fe94164952a8454e6ec5fc75e2c38baade2c14b231e47bf41989ffbb55ee4
MD5 24c441662c09b94e14a4096a8e59c316
SHA1 11576cad137bd8ed76efecd711c0390fe5c85292
SHA512 7f6ca1366733c5fb4925001c0846510732031a9e5f1b16291ff596187c20a88f41193389cedcb73e3928c318fc972be4f03e3cb71f1487c34642897ff9a2b590
SSDEEP 6144:XGaiVa9WL/GgkszuMO1yV8xTgUqMRQaMiBcxj8:Waisszux1yGRLHBo
TLSH
T1FD4402053F44A465D3689BB08AF3E2A782B8FD396C02D95BFD84775F2E37D0E9801265
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/448-68-0x0000000000AA0000-0x0000000000AE6000-memory.dmp

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memory/872-48-0x00000000003D0000-0x0000000000488000-memory.dmp

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memory/872-49-0x00000000054A0000-0x0000000005A46000-memory.dmp

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memory/872-50-0x0000000004EF0000-0x0000000004F82000-memory.dmp

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memory/872-51-0x0000000004E80000-0x0000000004E8A000-memory.dmp

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memory/2060-0-0x0000000000DD0000-0x0000000000EBC000-memory.dmp

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memory/2060-2-0x000000001BB20000-0x000000001BC04000-memory.dmp

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memory/2060-1-0x0000000003060000-0x0000000003070000-memory.dmp

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memory/3980-92-0x0000000000720000-0x0000000000728000-memory.dmp

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memory/4384-42-0x0000000000B50000-0x0000000000B8A000-memory.dmp

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memory/4500-47-0x0000000000406000-0x0000000000407000-memory.dmp

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memory/4500-69-0x0000000000400000-0x000000000041D000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads