e8a897ce923b1aeb439a86c5eb903aa82a856936dcd36c63d5574658cc3454fb

Analysis

max time kernel
444s
max time network
448s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
12-11-2024 16:37

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General

Target

txt.txt
Size

6B
MD5

05d163a09b2570905a0ee8f9fb43bd23
SHA1

1edd114d38d279a787c5ea863b0ba23fd9bed1ab
SHA256

e8a897ce923b1aeb439a86c5eb903aa82a856936dcd36c63d5574658cc3454fb
SHA512

1077c840623f1fb8362c5aac75b6b1c998118c896f3e2a134b5630b85a839d62c65310553112da7ccc398da47ec4666879030f68e1887953e94088a720a58072

Score

3^/10

Malware Config

Signatures

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

System Information Discovery
T1082

Modifies registry class 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4018527317-446799424-2810249686-1000_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-1-5-21-4018527317-446799424-2810249686-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:"	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4018527317-446799424-2810249686-1000_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-1-5-21-4018527317-446799424-2810249686-1000_Classes\Local Settings\MuiCache	BackgroundTransferHost.exe
Key created	\REGISTRY\USER\S-1-5-21-4018527317-446799424-2810249686-1000_Classes\Local Settings	cmd.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
3048	NOTEPAD.EXE

Suspicious behavior: LoadsDriver 6 IoCs

pid	Process
4	Process not Found
4	Process not Found
4	Process not Found
4	Process not Found
4	Process not Found
672	Process not Found

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1388 wrote to memory of 3048	1388	cmd.exe	78
PID 1388 wrote to memory of 3048	1388	cmd.exe	78

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\txt.txt
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1388
- C:\Windows\system32\NOTEPAD.EXE
  "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\txt.txt
  2⤵
  - Opens file in notepad (likely ransom note)
  PID:3048

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc
1⤵
PID:3068

C:\Windows\system32\BackgroundTransferHost.exe
"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.13
1⤵
- Modifies registry class
PID:5052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\BackgroundTransferApi\cf1e9321-154d-4dc9-a5ac-c25c6468f85e.down_data

Filesize
555KB

MD5
5683c0028832cae4ef93ca39c8ac5029

SHA1
248755e4e1db552e0b6f8651b04ca6d1b31a86fb

SHA256
855abd360d8a8d6974eba92b70cbd09ce519bc8773439993f9ab37cb6847309e

SHA512
aba434bd29be191c823b02ea9b639beb10647bbe7759bbffdaa790dfb1ec2c58d74c525ef11aacda209e4effe322d1d3a07b115446c8914b07a3bce4d8a0e2c3

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