66917fde7d1b93fb1283838e63aa522a1028bb13107b54e65a705ea0fbfcbca4

Analysis

max time kernel
149s
max time network
125s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
22/01/2024, 15:05

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General

Target

6fbc979fac89d10a30d96847e6aeecfa.exe
Size

43KB
MD5

6fbc979fac89d10a30d96847e6aeecfa
SHA1

ae6ffcdde795bdeb5cbc0e8d92e29c22ae5f313f
SHA256

66917fde7d1b93fb1283838e63aa522a1028bb13107b54e65a705ea0fbfcbca4
SHA512

67b7bd4b1aabb1c0d071c4d6e770cd447b7c0b3a7a9ea704f05f6b4d90d1a4fae5d5e051f18b3a57c4dee2a09417aa3ef83bf5e432464e2b6f353fb998b9dfd2
SSDEEP

768:uZNu8/7gteP3yD6xn8ZGI6maG9LXAEFYAWBm2u/6oR0pKXCgKh/:l8OePC+x8ZGI6maG9LjvWs/MKyHN

Score

7^/10

persistence

Malware Config

Signatures

Checks computer location settings 2 TTPs 1 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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	6fbc979fac89d10a30d96847e6aeecfa.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\brastk = "C:\\Windows\\system32\\brastk.exe"	6fbc979fac89d10a30d96847e6aeecfa.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\brastk = "C:\\Windows\\system32\\brastk.exe"	6fbc979fac89d10a30d96847e6aeecfa.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\brastk.exe	6fbc979fac89d10a30d96847e6aeecfa.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1012 wrote to memory of 1324	1012	6fbc979fac89d10a30d96847e6aeecfa.exe	87
PID 1012 wrote to memory of 1324	1012	6fbc979fac89d10a30d96847e6aeecfa.exe	87
PID 1012 wrote to memory of 1324	1012	6fbc979fac89d10a30d96847e6aeecfa.exe	87

C:\Users\Admin\AppData\Local\Temp\6fbc979fac89d10a30d96847e6aeecfa.exe
"C:\Users\Admin\AppData\Local\Temp\6fbc979fac89d10a30d96847e6aeecfa.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:1012
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\delself.bat" "
  2⤵
  PID:1324

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\delself.bat

Filesize
202B

MD5
5720554e579c200731cf4758172d2efc

SHA1
65a0611fd71cf4bb3ba1a1a325de56ea3d2f5f28

SHA256
3acffe96e12ab72189ea88089b6b9a2723e7b4ee52dde8435e8ce0f8f1972373

SHA512
6a19bf539f571a99a90594ed2f99264d0fef4e0791db8c00552a5a56d442ab960198bafa1f7cc283ef4c1d31ff252b23e9d35efaf031321992670f600cb50c07

Download Submit
memory/1012-0-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/1012-1-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/1012-2-0x0000000002020000-0x000000000202A000-memory.dmp

Filesize
40KB

Download
memory/1012-5-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads