bruteratel | 8ebc46c6f84bd19865a232b41ca20a22b08dac291ecc36df541e35ec2c626272

General

Target

9f1016e45dcdcff0288e945f406e1694.exe
Size

2.9MB
MD5

9f1016e45dcdcff0288e945f406e1694
SHA1

979fa2ee0b426361622b1eec7ea807e50488d4f6
SHA256

8ebc46c6f84bd19865a232b41ca20a22b08dac291ecc36df541e35ec2c626272
SHA512

1f3ebfc605ff220b67968896c03f7e720a11026ae030a7387e736524209f502589a9807d3b013d7c5efda4eab4cd681c424ceb2825593effd10a6ca5a60c535d
SSDEEP

49152:4C7dkwVwwGoP3I0pY9fJEn0JbjLJxRK44mZO/mqb9g9ueax/Nxy/r7QGninMD3cM:4CJkwVHH40S9fJEn0pjL/RK44v/mqoc2

Score

10^/10

bruteratel backdoor evasion persistence upx

Malware Config

Signatures

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

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1708	netsh.exe

UPX packed file 16 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2512-2-0x0000000000400000-0x0000000001A2F000-memory.dmp	upx
behavioral1/memory/2512-6-0x0000000000400000-0x0000000001A2F000-memory.dmp	upx
behavioral1/memory/2512-7-0x0000000000400000-0x0000000001A2F000-memory.dmp	upx
behavioral1/memory/2512-8-0x0000000000400000-0x0000000001A2F000-memory.dmp	upx
behavioral1/memory/2512-10-0x0000000000400000-0x0000000001A2F000-memory.dmp	upx
behavioral1/memory/2512-11-0x0000000000400000-0x0000000001A2F000-memory.dmp	upx
behavioral1/memory/2512-12-0x0000000000400000-0x0000000001A2F000-memory.dmp	upx
behavioral1/memory/2512-13-0x0000000000400000-0x0000000001A2F000-memory.dmp	upx
behavioral1/memory/2512-14-0x0000000000400000-0x0000000001A2F000-memory.dmp	upx
behavioral1/memory/2512-15-0x0000000000400000-0x0000000001A2F000-memory.dmp	upx
behavioral1/memory/2512-16-0x0000000000400000-0x0000000001A2F000-memory.dmp	upx
behavioral1/memory/2512-17-0x0000000000400000-0x0000000001A2F000-memory.dmp	upx
behavioral1/memory/2512-18-0x0000000000400000-0x0000000001A2F000-memory.dmp	upx
behavioral1/memory/2512-19-0x0000000000400000-0x0000000001A2F000-memory.dmp	upx
behavioral1/memory/2512-20-0x0000000000400000-0x0000000001A2F000-memory.dmp	upx
behavioral1/memory/2512-21-0x0000000000400000-0x0000000001A2F000-memory.dmp	upx

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\Windows32 = "C:\\windows\\system\\win.exe"	9f1016e45dcdcff0288e945f406e1694.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\svchosts.exe = "C:\\Windows\\System32\\svchosts.exe"	9f1016e45dcdcff0288e945f406e1694.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\svchosts.exe	9f1016e45dcdcff0288e945f406e1694.exe
File created	C:\Windows\SysWOW64\REGISTRANDO_001.txt	9f1016e45dcdcff0288e945f406e1694.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\WINDOWS\system\Start.kl	9f1016e45dcdcff0288e945f406e1694.exe
File created	C:\windows\system\win.exe	9f1016e45dcdcff0288e945f406e1694.exe

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2240	schtasks.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2512	9f1016e45dcdcff0288e945f406e1694.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2512 wrote to memory of 1708	2512	9f1016e45dcdcff0288e945f406e1694.exe	28
PID 2512 wrote to memory of 1708	2512	9f1016e45dcdcff0288e945f406e1694.exe	28
PID 2512 wrote to memory of 1708	2512	9f1016e45dcdcff0288e945f406e1694.exe	28
PID 2512 wrote to memory of 1708	2512	9f1016e45dcdcff0288e945f406e1694.exe	28
PID 2512 wrote to memory of 2240	2512	9f1016e45dcdcff0288e945f406e1694.exe	29
PID 2512 wrote to memory of 2240	2512	9f1016e45dcdcff0288e945f406e1694.exe	29
PID 2512 wrote to memory of 2240	2512	9f1016e45dcdcff0288e945f406e1694.exe	29
PID 2512 wrote to memory of 2240	2512	9f1016e45dcdcff0288e945f406e1694.exe	29

C:\Users\Admin\AppData\Local\Temp\9f1016e45dcdcff0288e945f406e1694.exe
"C:\Users\Admin\AppData\Local\Temp\9f1016e45dcdcff0288e945f406e1694.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2512
- C:\Windows\SysWOW64\netsh.exe
  netsh firewall add allowedprogram C:\windows\system\win.exe RPCCC
  2⤵
  - Modifies Windows Firewall
  PID:1708
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /tn startt /tr c:\autoexec.bat /sc onstart /ru system
  2⤵
  - Creates scheduled task(s)
  PID:2240

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

Scheduled Task/Job

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2512-2-0x0000000000400000-0x0000000001A2F000-memory.dmp

Filesize
22.2MB

Download
memory/2512-3-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2512-6-0x0000000000400000-0x0000000001A2F000-memory.dmp

Filesize
22.2MB

Download
memory/2512-7-0x0000000000400000-0x0000000001A2F000-memory.dmp

Filesize
22.2MB

Download
memory/2512-8-0x0000000000400000-0x0000000001A2F000-memory.dmp

Filesize
22.2MB

Download
memory/2512-9-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2512-10-0x0000000000400000-0x0000000001A2F000-memory.dmp

Filesize
22.2MB

Download
memory/2512-11-0x0000000000400000-0x0000000001A2F000-memory.dmp

Filesize
22.2MB

Download
memory/2512-12-0x0000000000400000-0x0000000001A2F000-memory.dmp

Filesize
22.2MB

Download
memory/2512-13-0x0000000000400000-0x0000000001A2F000-memory.dmp

Filesize
22.2MB

Download
memory/2512-14-0x0000000000400000-0x0000000001A2F000-memory.dmp

Filesize
22.2MB

Download
memory/2512-15-0x0000000000400000-0x0000000001A2F000-memory.dmp

Filesize
22.2MB

Download
memory/2512-16-0x0000000000400000-0x0000000001A2F000-memory.dmp

Filesize
22.2MB

Download
memory/2512-17-0x0000000000400000-0x0000000001A2F000-memory.dmp

Filesize
22.2MB

Download
memory/2512-18-0x0000000000400000-0x0000000001A2F000-memory.dmp

Filesize
22.2MB

Download
memory/2512-19-0x0000000000400000-0x0000000001A2F000-memory.dmp

Filesize
22.2MB

Download
memory/2512-20-0x0000000000400000-0x0000000001A2F000-memory.dmp

Filesize
22.2MB

Download
memory/2512-21-0x0000000000400000-0x0000000001A2F000-memory.dmp

Filesize
22.2MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads