asyncrat | cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b

General

Target

cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe
Size

1.7MB
MD5

40f8c17c136d4dc83b130c9467cf6dcc
SHA1

e9b6049aa7da0af9718f2f4ae91653d9bac403bb
SHA256

cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b
SHA512

6760a0752957535ec45ce3307e31569ac263eb73157d6a424d6e30647651a4e93db7c0378028d9e0ce07e65a357d2bb81047064ccda2f6a13fa7402ee7794c2d
SSDEEP

49152:IkXhu5J6iLKcMu/FQHujIytryx1GLMfzhh9JHTJ6qyrBbL:I0i9/COjIhkMfzhhMf

Score

10^/10

asyncrat stormkitty default discovery evasion rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

205.209.109.10:4449

205.209.109.10:7723

Mutex

clgbfqzkkypxjps

Attributes

delay
1
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 1 IoCs

resource	yara_rule
behavioral2/memory/4240-17-0x00000000096A0000-0x00000000097C2000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty

Async RAT payload 3 IoCs

rat

resource	yara_rule
behavioral2/memory/4240-1-0x00000000005A0000-0x0000000000A02000-memory.dmp	family_asyncrat
behavioral2/memory/4240-2-0x00000000005A0000-0x0000000000A02000-memory.dmp	family_asyncrat
behavioral2/memory/4240-60-0x00000000005A0000-0x0000000000A02000-memory.dmp	family_asyncrat

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Wine	cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4240	cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4712	4240	WerFault.exe	82

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4240	cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe
4240	cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe
4240	cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe
4240	cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe
4240	cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe
4240	cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4240	cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4240	cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe

C:\Users\Admin\AppData\Local\Temp\cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe
"C:\Users\Admin\AppData\Local\Temp\cafb60920939bd2079d96f2e6e73f87632bc15bd72998f864e8968f7aab9623b.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4240
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4240 -s 2868
  2⤵
  - Program crash
  PID:4712

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4240 -ip 4240
1⤵
PID:4260

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Browser Information Discovery

Query Registry

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/4240-0-0x00000000005A0000-0x0000000000A02000-memory.dmp

Filesize
4.4MB

Download
memory/4240-1-0x00000000005A0000-0x0000000000A02000-memory.dmp

Filesize
4.4MB

Download
memory/4240-2-0x00000000005A0000-0x0000000000A02000-memory.dmp

Filesize
4.4MB

Download
memory/4240-3-0x0000000007A00000-0x0000000007FA4000-memory.dmp

Filesize
5.6MB

Download
memory/4240-5-0x00000000076F0000-0x0000000007782000-memory.dmp

Filesize
584KB

Download
memory/4240-6-0x0000000007660000-0x000000000766A000-memory.dmp

Filesize
40KB

Download
memory/4240-8-0x00000000005A0000-0x0000000000A02000-memory.dmp

Filesize
4.4MB

Download
memory/4240-12-0x0000000008390000-0x000000000842C000-memory.dmp

Filesize
624KB

Download
memory/4240-13-0x00000000089F0000-0x0000000008A56000-memory.dmp

Filesize
408KB

Download
memory/4240-16-0x0000000009620000-0x0000000009696000-memory.dmp

Filesize
472KB

Download
memory/4240-17-0x00000000096A0000-0x00000000097C2000-memory.dmp

Filesize
1.1MB

Download
memory/4240-18-0x00000000097C0000-0x00000000097DE000-memory.dmp

Filesize
120KB

Download
memory/4240-42-0x0000000009AB0000-0x0000000009E04000-memory.dmp

Filesize
3.3MB

Download
memory/4240-43-0x0000000009910000-0x000000000995C000-memory.dmp

Filesize
304KB

Download
memory/4240-60-0x00000000005A0000-0x0000000000A02000-memory.dmp

Filesize
4.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads