becd4a1769feee497b51cfea1dc13bf4cfa7246f05d1c230b0e3ee0a4ed6e18c

Analysis

max time kernel
89s
max time network
46s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
02/12/2022, 17:10

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General

Target

becd4a1769feee497b51cfea1dc13bf4cfa7246f05d1c230b0e3ee0a4ed6e18c.exe
Size

420KB
MD5

721b099b3736879cff2da2dace30e77a
SHA1

9e2e610dd2c6dbfc347979dee7c1a80e519f3336
SHA256

becd4a1769feee497b51cfea1dc13bf4cfa7246f05d1c230b0e3ee0a4ed6e18c
SHA512

36059b3efe1a9a8e16b7bbc7161379987704e2d3a8f32e03870d8142aadf5c020f264286f48d2f6657626f8683657490519e28c9023c4d74b709b566f0ad3144
SSDEEP

6144:A5PThKXOCIr/THcclUvDlHBB9qveGUnANsMhf64LhflMBq6Z0iclW:eThKbIr/SZHv4veGhfVLhP6Z0iS

Score

6^/10

bootkit 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

T1067

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	becd4a1769feee497b51cfea1dc13bf4cfa7246f05d1c230b0e3ee0a4ed6e18c.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	explorer.exe

Modifies Internet Explorer settings 1 TTPs 2 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Internet Explorer\Toolbar	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Internet Explorer\Toolbar\Locked = "1"	explorer.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000_Classes\Local Settings	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1392 wrote to memory of 892	1392	becd4a1769feee497b51cfea1dc13bf4cfa7246f05d1c230b0e3ee0a4ed6e18c.exe	28
PID 1392 wrote to memory of 892	1392	becd4a1769feee497b51cfea1dc13bf4cfa7246f05d1c230b0e3ee0a4ed6e18c.exe	28
PID 1392 wrote to memory of 892	1392	becd4a1769feee497b51cfea1dc13bf4cfa7246f05d1c230b0e3ee0a4ed6e18c.exe	28
PID 1392 wrote to memory of 892	1392	becd4a1769feee497b51cfea1dc13bf4cfa7246f05d1c230b0e3ee0a4ed6e18c.exe	28

C:\Users\Admin\AppData\Local\Temp\becd4a1769feee497b51cfea1dc13bf4cfa7246f05d1c230b0e3ee0a4ed6e18c.exe
"C:\Users\Admin\AppData\Local\Temp\becd4a1769feee497b51cfea1dc13bf4cfa7246f05d1c230b0e3ee0a4ed6e18c.exe"
1⤵
- Writes to the Master Boot Record (MBR)
- Suspicious use of WriteProcessMemory
PID:1392
- C:\Windows\SysWOW64\explorer.exe
  "C:\Windows\System32\explorer.exe" ::{20D04FE0-3AEA-1069-A2D8-08002B30309D}
  2⤵
  PID:892

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
- Checks processor information in registry
- Modifies Internet Explorer settings
- Modifies registry class
PID:1592

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/892-57-0x0000000074AC1000-0x0000000074AC3000-memory.dmp

Filesize
8KB

Download
memory/1392-54-0x0000000075521000-0x0000000075523000-memory.dmp

Filesize
8KB

Download
memory/1592-58-0x000007FEFBA81000-0x000007FEFBA83000-memory.dmp

Filesize
8KB

Download
memory/1592-59-0x0000000003740000-0x0000000003750000-memory.dmp

Filesize
64KB

Download