asyncrat | 2571269949580368a87a0e89bcecc0957e539a6a0132756aa998fab9e35ddc82

Analysis

max time kernel
115s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
06-06-2023 03:26

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General

Target

0f3a96431372569b08e4ff29618705e5.exe
Size

47KB
MD5

0f3a96431372569b08e4ff29618705e5
SHA1

fa10c0c72a91603dc14aad5200a9db52f8409ee3
SHA256

2571269949580368a87a0e89bcecc0957e539a6a0132756aa998fab9e35ddc82
SHA512

73c86dc6f9ffc948da986edd6cc5a48c1f8038e9db9cd8500dad3c8b4cf21943587b8eab4e6eb222f8733176dd00aeb542b3d5f80dd8435ad0fafa493133c4fa
SSDEEP

768:auwCfTg46YbWUn8jjmo2qrrmux2zfPIwtzNQwN630bnjmrvcyiqhYdNx/BDZ8x:auwCfTgp/2a/M4wtckbnjgUvdNxJd8x

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

45.147.45.253:30303

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4892-133-0x0000000000520000-0x0000000000532000-memory.dmp	asyncrat

Drops file in System32 directory 2 IoCs

Processes:

svchost.exe

description	ioc	process
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{086E3058-E304-443D-A66A-5182ECE2F64E}.catalogItem	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{D6EE4711-EC27-4A71-AD30-35FAA414544A}.catalogItem	svchost.exe

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

svchost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	svchost.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

svchost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

0f3a96431372569b08e4ff29618705e5.exe

description pid process

Token: SeDebugPrivilege 4892 0f3a96431372569b08e4ff29618705e5.exe
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

description	pid	process
Token: SeDebugPrivilege	4892	0f3a96431372569b08e4ff29618705e5.exe

C:\Users\Admin\AppData\Local\Temp\0f3a96431372569b08e4ff29618705e5.exe
"C:\Users\Admin\AppData\Local\Temp\0f3a96431372569b08e4ff29618705e5.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4892

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k netsvcs -p
1⤵
- Drops file in System32 directory
- Checks processor information in registry
- Enumerates system info in registry
PID:1808

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/4892-133-0x0000000000520000-0x0000000000532000-memory.dmp

Filesize
72KB

Download
memory/4892-134-0x0000000004F10000-0x0000000004F20000-memory.dmp

Filesize
64KB

Download
memory/4892-137-0x0000000005700000-0x000000000579C000-memory.dmp

Filesize
624KB

Download
memory/4892-138-0x0000000005D50000-0x00000000062F4000-memory.dmp

Filesize
5.6MB

Download
memory/4892-139-0x0000000005810000-0x0000000005876000-memory.dmp

Filesize
408KB

Download
memory/4892-140-0x0000000004F10000-0x0000000004F20000-memory.dmp

Filesize
64KB

Download