950403d1e1e212e879ff5051542fd3f7a42d6bd191bd3e08be94764402c3c83e

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
29/12/2023, 23:03

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General

Target
066a28de156841bf3b11122b68a90722.exe
Size 49KB
Sample231229-21587aebh8
SHA256 950403d1e1e212e879ff5051542fd3f7a42d6bd191bd3e08be94764402c3c83e
MD5 066a28de156841bf3b11122b68a90722
SHA1 40a3a22cea614a1d1776ec991fe94a784e393d3b
SHA512 dee216c245e6ddc6450a3071309512d46ac521ae3a1d3a81efac0d3c80ec9a234f964459719c1b2690b7ca11939b4fd7faebfad3ecd54e3cd9fe156d7625ad7c
SSDEEP 1536:KjiJiYb/D2VGf2QYGWvoefKR2NPf1Ol0b3M:KGJp/qg+QYGwCR2Jk
MD5 SHA1 SHA512 SSDEEP

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-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation	066a28de156841bf3b11122b68a90722.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\braviax = "C:\\Windows\\system32\\braviax.exe"	066a28de156841bf3b11122b68a90722.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\braviax = "C:\\Windows\\system32\\braviax.exe"	066a28de156841bf3b11122b68a90722.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\braviax.exe	066a28de156841bf3b11122b68a90722.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 1016 wrote to memory of 1896	1016	066a28de156841bf3b11122b68a90722.exe	90
PID 1016 wrote to memory of 1896	1016	066a28de156841bf3b11122b68a90722.exe	90
PID 1016 wrote to memory of 1896	1016	066a28de156841bf3b11122b68a90722.exe	90

C:\Users\Admin\AppData\Local\Temp\066a28de156841bf3b11122b68a90722.exe
"C:\Users\Admin\AppData\Local\Temp\066a28de156841bf3b11122b68a90722.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:1016
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\delself.bat" "
  2⤵
  PID:1896

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

delself.bat

Path C:\Users\Admin\AppData\Local\Temp\delself.bat
Size 202B
SHA256 59d87286ea0ffbc5fae7b8e1c1e078f1d6c4277696e395ff8824dbc29c8be5bb
MD5 6184263cdd14c2c05d434706d7e026d8
SHA1 9879103f9272e0db76f41a406816bf62661d595c
SHA512 937005fc0b51aebd71ffbf631d1596226adb4a6b5e19da16fa99b5df930199b0fced945bc62db9bc518943b3141eca3724e2690f5b57b1e5905013dc84c5295f
MD5 SHA1 SHA512

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memory/1016-0-0x0000000000400000-0x000000000040F000-memory.dmp

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memory/1016-1-0x0000000000560000-0x000000000056C000-memory.dmp

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memory/1016-7-0x0000000000400000-0x000000000040F000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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