asyncrat | 9864678182d8d06ed1bebd8aad901cab4f77cfced7547f5e365e8c1854ef2cdf

General

Target

Cranium.exe
Size

48KB
MD5

0acff5a467301fe851017b11e1263334
SHA1

67282d4682edbb78cc3eded3d3621d20060e5517
SHA256

9864678182d8d06ed1bebd8aad901cab4f77cfced7547f5e365e8c1854ef2cdf
SHA512

ec18c72cf4184781fe3deffa64c6dbd48f75ba9d185f6fa689469e1aded7aa7e5705c0f7abb5173f9ace1db039fbd0dda6f4d07014cac179f59132925df6f70f
SSDEEP

768:6uYp9T3kH1jWUvTqRmo2qb2v8eIfEePIL1/Yr90bzZR51guD6NpHqS/9OuBDZ0C:6uYp9T34y2PZuEnp/9bzZR7guD8R/91L

Score

10^/10

asyncrat default evasion rat trojan

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

Mutex

HVo4diHzRR9N

Attributes

delay
3
install
true
install_file
Cranium.exe
install_folder
%Temp%
pastebin_config
https://pastebin.com/raw/d3N8c1P9

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

Processes:

Cranium.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	Cranium.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	Cranium.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	Cranium.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	Cranium.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

Cranium.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features	Cranium.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	Cranium.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service
T1102

Processes:

flow ioc

4 pastebin.com
5 pastebin.com
6 5.tcp.eu.ngrok.io
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

344 powershell.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Cranium.exepowershell.exe

description pid process

Token: SeDebugPrivilege 1148 Cranium.exe
Token: SeDebugPrivilege 1148 Cranium.exe
Token: SeDebugPrivilege 344 powershell.exe

flow	ioc
4	pastebin.com
5	pastebin.com
6	5.tcp.eu.ngrok.io

pid	process
344	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1148	Cranium.exe
Token: SeDebugPrivilege	1148	Cranium.exe
Token: SeDebugPrivilege	344	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

Cranium.exe

description	pid	process	target process
PID 1148 wrote to memory of 344	1148	Cranium.exe	powershell.exe
PID 1148 wrote to memory of 344	1148	Cranium.exe	powershell.exe
PID 1148 wrote to memory of 344	1148	Cranium.exe	powershell.exe
PID 1148 wrote to memory of 344	1148	Cranium.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\Cranium.exe
"C:\Users\Admin\AppData\Local\Temp\Cranium.exe"
1⤵
- Modifies Windows Defender Real-time Protection settings
- Windows security modification
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1148
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:344

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Privilege Escalation

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Defense Evasion

Impair Defenses

2

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar772A.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
memory/344-49-0x000000006F290000-0x000000006F83B000-memory.dmp

Filesize
5.7MB

Download
memory/344-46-0x000000006F291000-0x000000006F292000-memory.dmp

Filesize
4KB

Download
memory/344-51-0x000000006F290000-0x000000006F83B000-memory.dmp

Filesize
5.7MB

Download
memory/344-50-0x000000006F290000-0x000000006F83B000-memory.dmp

Filesize
5.7MB

Download
memory/344-48-0x000000006F290000-0x000000006F83B000-memory.dmp

Filesize
5.7MB

Download
memory/344-47-0x000000006F290000-0x000000006F83B000-memory.dmp

Filesize
5.7MB

Download
memory/1148-2-0x0000000074D40000-0x000000007542E000-memory.dmp

Filesize
6.9MB

Download
memory/1148-1-0x0000000000820000-0x0000000000832000-memory.dmp

Filesize
72KB

Download
memory/1148-20-0x0000000074D4E000-0x0000000074D4F000-memory.dmp

Filesize
4KB

Download
memory/1148-23-0x0000000005080000-0x00000000050E4000-memory.dmp

Filesize
400KB

Download
memory/1148-0-0x0000000074D4E000-0x0000000074D4F000-memory.dmp

Filesize
4KB

Download
memory/1148-21-0x0000000074D40000-0x000000007542E000-memory.dmp

Filesize
6.9MB

Download
memory/1148-52-0x00000000050E0000-0x0000000005144000-memory.dmp

Filesize
400KB

Download
memory/1148-73-0x0000000005F90000-0x0000000005FF2000-memory.dmp

Filesize
392KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads