bruteratel | 04c031ecbff301c0c7c55c8c9352dea457370b221c314710e2e94575b8caf45b

Resubmissions

15/03/2024, 08:35

240315-khfr5scb41 10

08/03/2024, 06:28

240308-g8rqjsac9y 10

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08/03/2024, 06:28

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General

Target

bac03e7065835ff2e82f01801740a5e0.exe
Size

1.3MB
MD5

bac03e7065835ff2e82f01801740a5e0
SHA1

2bf512bc4f3d6f1bece40073ddedadad65264166
SHA256

04c031ecbff301c0c7c55c8c9352dea457370b221c314710e2e94575b8caf45b
SHA512

a2ee185a51f1ee7d53a622013ccb9f47c9893f304dce3413d53399ad3d757ed0dd7782f8dbe3f60c8f19c9f69fd40fc8fbb3b59aa09279871a3ee50878f50d97
SSDEEP

24576:r4VrnNUc9BJxetHXQf/R4GdfEzh7B905zfXKkfz+bVILjMxuY:cFNlYXI/R4GduL05zfXdfgVILY1

Score

10^/10

bruteratel backdoor

Malware Config

Signatures

Brute Ratel C4
A customized command and control framework for red teaming and adversary simulation.
backdoor bruteratel

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-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	bac03e7065835ff2e82f01801740a5e0.exe

Executes dropped EXE 1 IoCs

pid	Process
4468	acrobat32.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\WINDOWS\SYSTEM.LOG	acrobat32.exe

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

System Information Discovery
T1082

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4468	acrobat32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4804 wrote to memory of 4468	4804	bac03e7065835ff2e82f01801740a5e0.exe	90
PID 4804 wrote to memory of 4468	4804	bac03e7065835ff2e82f01801740a5e0.exe	90
PID 4804 wrote to memory of 4468	4804	bac03e7065835ff2e82f01801740a5e0.exe	90

C:\Users\Admin\AppData\Local\Temp\bac03e7065835ff2e82f01801740a5e0.exe
"C:\Users\Admin\AppData\Local\Temp\bac03e7065835ff2e82f01801740a5e0.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4804
- C:\Arquivos de programas\acrobat32.exe
  "C:\Arquivos de programas\acrobat32.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in Windows directory
  - Suspicious behavior: GetForegroundWindowSpam
  PID:4468

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

C:\Arquivos de programas\acrobat32.exe

Filesize
4.7MB

MD5
a2dcbb2ea492923bc079572d1af44ceb

SHA1
64a06cbcd34b7590f777bb5f999e010079d343ac

SHA256
3d0aa495d530afbc829b377a9cc7487edba1ba0e98d814f938427d5d0f7afe2a

SHA512
1eddaaaa94f7f3664481ae6092730c0ebffecac70da1d423c8bc98e885be030e2f4d17bc84443e84e1409ec5a09f767570e40660d5a3924af465b9b02cd9b452

Download Submit
C:\Arquivos de programas\acrobat32.exe

Filesize
4.5MB

MD5
d0a633d0ff389fcfe160a90ceb440801

SHA1
0cb7672527b71a82f136e9ed453b68359e96fe37

SHA256
10b15f3f2167cce7387bd5daf277f859d72c17c0fa28c5f6f6292340d8798111

SHA512
951a52e45f337b9d50d2d84d697965f106a0c2b82be57bdbdf8bb4170332fac5b61ff3ac52e681261fbaf4f84ba000872e4235e315c0382f0479567bc8dadd4e

Download Submit
C:\Arquivos de programas\acrobat32.exe

Filesize
8.3MB

MD5
07911018bedfc93cfed840716423eabf

SHA1
d13f07d03da8820464ff8c4971a7a3a77fd19bcd

SHA256
fe2b2d760396438efbf3664b8d92c76d4aa64d2453cb229fa70e465ec5bd6017

SHA512
aeeb2b6fd279d98e5401d6f3f0145a8ecc8952233922b9a2892fa4f38dbe01c10251355b387a425144958fb72477ef49c8ef8db2ddb54b3ab92392fede8a74b4

Download Submit
memory/4468-12-0x0000000001800000-0x0000000001801000-memory.dmp

Filesize
4KB

Download
memory/4468-14-0x0000000000280000-0x0000000001532000-memory.dmp

Filesize
18.7MB

Download
memory/4804-13-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download