cb9cf83de18777f09316679851622e8c243858f25c1bea1dbf5bcd0ca570cc38

Analysis

max time kernel
143s
max time network
34s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
27/11/2022, 14:47

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General

Target

cb9cf83de18777f09316679851622e8c243858f25c1bea1dbf5bcd0ca570cc38.exe
Size

337KB
MD5

083b977ad81ff82158cffa7c35416658
SHA1

d83862114df369a1a5a0c4c497980d6b2f64a529
SHA256

cb9cf83de18777f09316679851622e8c243858f25c1bea1dbf5bcd0ca570cc38
SHA512

3682e62c344b8278110b5452912aed8fada3dbc40af52a38872e1ec6b550b480ece1686b801a6214101b27790b6b1a03bfe527aaefad23adfc565a5537f68810
SSDEEP

6144:AggcT/LAARrZxYKmBSH2dxJOR8ghuinEFHOgZonaN3:VgcDL9ZsV9vJWhVnhc5R

Score

8^/10

bootkit persistence upx

Malware Config

Signatures

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1976-57-0x0000000002050000-0x000000000205E000-memory.dmp	upx
behavioral1/memory/1976-59-0x0000000002050000-0x000000000205E000-memory.dmp	upx
behavioral1/memory/1976-62-0x0000000002050000-0x000000000205E000-memory.dmp	upx

Loads dropped DLL 1 IoCs

pid	Process
1976	cb9cf83de18777f09316679851622e8c243858f25c1bea1dbf5bcd0ca570cc38.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\affeabeacfefgfdgfdgdfg = "\"C:\\ProgramData\\affeabeacfefgfdgfdgdfg.exe\""	cb9cf83de18777f09316679851622e8c243858f25c1bea1dbf5bcd0ca570cc38.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	cb9cf83de18777f09316679851622e8c243858f25c1bea1dbf5bcd0ca570cc38.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

T1067

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	cb9cf83de18777f09316679851622e8c243858f25c1bea1dbf5bcd0ca570cc38.exe

Modifies registry class 3 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile"	cb9cf83de18777f09316679851622e8c243858f25c1bea1dbf5bcd0ca570cc38.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.key	cb9cf83de18777f09316679851622e8c243858f25c1bea1dbf5bcd0ca570cc38.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\	cb9cf83de18777f09316679851622e8c243858f25c1bea1dbf5bcd0ca570cc38.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1976	cb9cf83de18777f09316679851622e8c243858f25c1bea1dbf5bcd0ca570cc38.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1216	Explorer.EXE

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 1976 wrote to memory of 1216	1976	cb9cf83de18777f09316679851622e8c243858f25c1bea1dbf5bcd0ca570cc38.exe	15

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
PID:1216
- C:\Users\Admin\AppData\Local\Temp\cb9cf83de18777f09316679851622e8c243858f25c1bea1dbf5bcd0ca570cc38.exe
  "C:\Users\Admin\AppData\Local\Temp\cb9cf83de18777f09316679851622e8c243858f25c1bea1dbf5bcd0ca570cc38.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Writes to the Master Boot Record (MBR)
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1976

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\libnspr4.dll

Filesize
10KB

MD5
28a57355d9583b66e51ad978384c159e

SHA1
b8fe4ddb6187cdee0e89c02bab4a104f406d16da

SHA256
81ed76156df0de1caae6730a091f29978493881b54a2d6fbfb43c47153b6fadd

SHA512
991a288ed0f033eb8f54e567a6264a6111f795bd61a1cd600e210730d7ed39c89e735480dc6f0e4026eafad730ae8dc23ec7bc7600a14a2ac9d652638c02ee3e

Download Submit
memory/1216-65-0x00000000025C0000-0x00000000025D7000-memory.dmp

Filesize
92KB

Download
memory/1976-54-0x0000000000400000-0x00000000005F3000-memory.dmp

Filesize
1.9MB

Download
memory/1976-55-0x0000000000990000-0x00000000009A0000-memory.dmp

Filesize
64KB

Download
memory/1976-57-0x0000000002050000-0x000000000205E000-memory.dmp

Filesize
56KB

Download
memory/1976-59-0x0000000002050000-0x000000000205E000-memory.dmp

Filesize
56KB

Download
memory/1976-58-0x0000000000990000-0x00000000009A0000-memory.dmp

Filesize
64KB

Download
memory/1976-61-0x0000000000400000-0x00000000005F3000-memory.dmp

Filesize
1.9MB

Download
memory/1976-62-0x0000000002050000-0x000000000205E000-memory.dmp

Filesize
56KB

Download
memory/1976-63-0x0000000076651000-0x0000000076653000-memory.dmp

Filesize
8KB

Download
memory/1976-64-0x0000000000400000-0x00000000005F3000-memory.dmp

Filesize
1.9MB

Download
memory/1976-66-0x0000000000990000-0x000000000099C000-memory.dmp

Filesize
48KB

Download