asyncrat | c7b89630f366ba04189f87ed7ccf7838b7db61ee00b9103ffbc6c18d829659cb

Analysis

max time kernel
109s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
30-06-2024 20:02

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

AsyncClient_protected.exe
Size

3.7MB
MD5

b932c68c0270883947f788e8f515b3f5
SHA1

331f4298b4d87ab1acf0e7d675a9475383f0a524
SHA256

c7b89630f366ba04189f87ed7ccf7838b7db61ee00b9103ffbc6c18d829659cb
SHA512

1bceb186d1a040524836bba0526437a69041fd3a399c5bceb0151a793d2258210c49be572e838e22ef06c640953f475ccfd203c267eb5464e8c04d712b08e3f3
SSDEEP

98304:XIG/gN1A2Z5wiUv6QZjKcm/S7L8ziQGq/gU:XIG/gso5wii/Kcm5zFG

Score

10^/10

asyncrat default evasion rat themida trojan

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

2.tcp.ngrok.io:7777

2.tcp.ngrok.io:13109

Mutex

dW8XbmjCtqQS

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

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

AsyncClient_protected.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ AsyncClient_protected.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	AsyncClient_protected.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

Processes:

AsyncClient_protected.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	AsyncClient_protected.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	AsyncClient_protected.exe

Themida packer 2 IoCs
Detects Themida, an advanced Windows software protection system.
themida

Processes:

resource yara_rule

behavioral2/memory/3248-12-0x0000000000400000-0x0000000000D9A000-memory.dmp themida
behavioral2/memory/3248-13-0x0000000000400000-0x0000000000D9A000-memory.dmp themida
Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

AsyncClient_protected.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA AsyncClient_protected.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service
T1102

Processes:

flow ioc

39 2.tcp.ngrok.io
57 2.tcp.ngrok.io
65 2.tcp.ngrok.io
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

AsyncClient_protected.exe

pid process

3248 AsyncClient_protected.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

AsyncClient_protected.exe

pid process

3248 AsyncClient_protected.exe
3248 AsyncClient_protected.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

AsyncClient_protected.exe

description pid process

Token: SeDebugPrivilege 3248 AsyncClient_protected.exe

resource	yara_rule
behavioral2/memory/3248-12-0x0000000000400000-0x0000000000D9A000-memory.dmp	themida
behavioral2/memory/3248-13-0x0000000000400000-0x0000000000D9A000-memory.dmp	themida

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	AsyncClient_protected.exe

flow	ioc
39	2.tcp.ngrok.io
57	2.tcp.ngrok.io
65	2.tcp.ngrok.io

pid	process
3248	AsyncClient_protected.exe

pid	process
3248	AsyncClient_protected.exe
3248	AsyncClient_protected.exe

description	pid	process
Token: SeDebugPrivilege	3248	AsyncClient_protected.exe

C:\Users\Admin\AppData\Local\Temp\AsyncClient_protected.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncClient_protected.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3248

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1044 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:8
1⤵
PID:3592

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

T1102

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

memory/3248-0-0x0000000000400000-0x0000000000D9A000-memory.dmp

Filesize
9.6MB

Download
memory/3248-1-0x0000000076170000-0x0000000076171000-memory.dmp

Filesize
4KB

Download
memory/3248-2-0x0000000076150000-0x0000000076240000-memory.dmp

Filesize
960KB

Download
memory/3248-3-0x0000000076150000-0x0000000076240000-memory.dmp

Filesize
960KB

Download
memory/3248-4-0x0000000076150000-0x0000000076240000-memory.dmp

Filesize
960KB

Download
memory/3248-7-0x0000000076150000-0x0000000076240000-memory.dmp

Filesize
960KB

Download
memory/3248-6-0x0000000076150000-0x0000000076240000-memory.dmp

Filesize
960KB

Download
memory/3248-5-0x0000000076150000-0x0000000076240000-memory.dmp

Filesize
960KB

Download
memory/3248-8-0x0000000076150000-0x0000000076240000-memory.dmp

Filesize
960KB

Download
memory/3248-10-0x0000000000400000-0x0000000000D9A000-memory.dmp

Filesize
9.6MB

Download
memory/3248-12-0x0000000000400000-0x0000000000D9A000-memory.dmp

Filesize
9.6MB

Download
memory/3248-13-0x0000000000400000-0x0000000000D9A000-memory.dmp

Filesize
9.6MB

Download
memory/3248-14-0x0000000076170000-0x0000000076171000-memory.dmp

Filesize
4KB

Download
memory/3248-15-0x0000000076150000-0x0000000076240000-memory.dmp

Filesize
960KB

Download
memory/3248-16-0x0000000076150000-0x0000000076240000-memory.dmp

Filesize
960KB

Download
memory/3248-18-0x0000000076150000-0x0000000076240000-memory.dmp

Filesize
960KB

Download
memory/3248-19-0x0000000076150000-0x0000000076240000-memory.dmp

Filesize
960KB

Download
memory/3248-28-0x0000000001310000-0x00000000013AC000-memory.dmp

Filesize
624KB

Download
memory/3248-29-0x0000000005A50000-0x0000000005FF4000-memory.dmp

Filesize
5.6MB

Download
memory/3248-30-0x0000000006000000-0x0000000006066000-memory.dmp

Filesize
408KB

Download
memory/3248-33-0x0000000006A70000-0x0000000006AE6000-memory.dmp

Filesize
472KB

Download
memory/3248-34-0x0000000006AF0000-0x0000000006B58000-memory.dmp

Filesize
416KB

Download
memory/3248-35-0x0000000006BA0000-0x0000000006BBE000-memory.dmp

Filesize
120KB

Download
memory/3248-37-0x0000000006E00000-0x0000000006E92000-memory.dmp

Filesize
584KB

Download