b48a7520e626750e09825ec0489993d1e6296d68ed8ed4f9e65f1309d47a3d5a

Resubmissions

08/11/2024, 16:03

241108-ththnstrdt6

29/04/2023, 06:10

230429-gwz66aaa486

Analysis

max time kernel
504s
max time network
460s
platform
windows11-21h2_x64
resource
win11-20241023-en
resource tags

arch:x64arch:x86image:win11-20241023-enlocale:en-usos:windows11-21h2-x64system
submitted
08/11/2024, 16:03

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General

Target
crash.exe
Size 1.9MB
Sample241108-ththnstrdt
SHA256 b48a7520e626750e09825ec0489993d1e6296d68ed8ed4f9e65f1309d47a3d5a
MD5 2d50282fde2fbcc74524a36dda9f357e
SHA1 2aba1f0b1c5945b08b3202622550422a42996969
SHA512 e2806b80b8ea12ea55c0a790ec66df956ead332a0ce1e082d543d77d04127f0a2de891e88838db483e7d600a3ffa3ca5461bf4b97f9584cad3b226cce429c72a
SSDEEP 49152:bqnlRb4HOL/3Vlsc0Yg9mLtD1FzKueODUE5:EvVp2bE
MD5 SHA1 SHA512 SSDEEP

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

T1542.003

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

Modifies registry class 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4248760313-3670024077-2384670640-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\History\CachePrefix = "Visited:"	BackgroundTransferHost.exe
Key created	\REGISTRY\USER\S-1-5-21-4248760313-3670024077-2384670640-1000_Classes\Local Settings\MuiCache	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4248760313-3670024077-2384670640-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Content\CachePrefix	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4248760313-3670024077-2384670640-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:"	BackgroundTransferHost.exe

C:\Users\Admin\AppData\Local\Temp\crash.exe
"C:\Users\Admin\AppData\Local\Temp\crash.exe"
1⤵
- Writes to the Master Boot Record (MBR)
PID:832

C:\Windows\system32\BackgroundTransferHost.exe
"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.13
1⤵
- Modifies registry class
PID:3572

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:4800

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe"
1⤵
PID:4836

Network

MITRE ATT&CK Enterprise v15

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

64ebca41-507f-40f2-bdeb-9ff54175198c.down_data

Path C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\BackgroundTransferApi\64ebca41-507f-40f2-bdeb-9ff54175198c.down_data
Size 555KB
SHA256 855abd360d8a8d6974eba92b70cbd09ce519bc8773439993f9ab37cb6847309e
MD5 5683c0028832cae4ef93ca39c8ac5029
SHA1 248755e4e1db552e0b6f8651b04ca6d1b31a86fb
SHA512 aba434bd29be191c823b02ea9b639beb10647bbe7759bbffdaa790dfb1ec2c58d74c525ef11aacda209e4effe322d1d3a07b115446c8914b07a3bce4d8a0e2c3
SSDEEP 6144:m4W6OWkK0An6PtQ3VG7Gz3AW/ZPfMKUPIbs7aGU4toNNQQPi/+sMT/TtpNkppXsb:hW6O/k1zQWZz/QtGo2saBKZIxWoOu
MD5 SHA1 SHA512 SSDEEP

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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