asyncrat | c7b89630f366ba04189f87ed7ccf7838b7db61ee00b9103ffbc6c18d829659cb

Analysis

max time kernel
142s
max time network
156s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
30-06-2024 20:02

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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

behavioral1/memory/1452-16-0x0000000000400000-0x0000000000D9A000-memory.dmp themida
behavioral1/memory/1452-17-0x0000000000400000-0x0000000000D9A000-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 1 IoCs

Web Service
T1102

Processes:

flow ioc

2 2.tcp.ngrok.io
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

AsyncClient_protected.exe

pid process

1452 AsyncClient_protected.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

AsyncClient_protected.exe

pid process

1452 AsyncClient_protected.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

AsyncClient_protected.exe

description pid process

Token: SeDebugPrivilege 1452 AsyncClient_protected.exe

resource	yara_rule
behavioral1/memory/1452-16-0x0000000000400000-0x0000000000D9A000-memory.dmp	themida
behavioral1/memory/1452-17-0x0000000000400000-0x0000000000D9A000-memory.dmp	themida

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

flow	ioc
2	2.tcp.ngrok.io

pid	process
1452	AsyncClient_protected.exe

pid	process
1452	AsyncClient_protected.exe

description	pid	process
Token: SeDebugPrivilege	1452	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:1452

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

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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\TarE22C.tmp
Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
memory/1452-3-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download
memory/1452-0-0x0000000000400000-0x0000000000D9A000-memory.dmp

Filesize
9.6MB

Download
memory/1452-1-0x00000000757EE000-0x00000000757EF000-memory.dmp

Filesize
4KB

Download
memory/1452-11-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download
memory/1452-9-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download
memory/1452-8-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download
memory/1452-7-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download
memory/1452-6-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download
memory/1452-5-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download
memory/1452-15-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download
memory/1452-12-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download
memory/1452-10-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download
memory/1452-4-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download
memory/1452-16-0x0000000000400000-0x0000000000D9A000-memory.dmp

Filesize
9.6MB

Download
memory/1452-17-0x0000000000400000-0x0000000000D9A000-memory.dmp

Filesize
9.6MB

Download
memory/1452-18-0x00000000757EE000-0x00000000757EF000-memory.dmp

Filesize
4KB

Download
memory/1452-19-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download
memory/1452-20-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download
memory/1452-21-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download
memory/1452-22-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download
memory/1452-44-0x0000000006910000-0x0000000006978000-memory.dmp

Filesize
416KB

Download
memory/1452-2-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download
memory/1452-13-0x00000000757E0000-0x0000000075827000-memory.dmp

Filesize
284KB

Download