asyncrat | 430d855fc783133d2d5bc01c095baff7d8b416a0f7c15a8a59288a96fcee7aa1

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
16/01/2023, 16:54

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General

Target
ws.exe
Size 3.0MB
Sample230116-vejpqsaa96
SHA256 430d855fc783133d2d5bc01c095baff7d8b416a0f7c15a8a59288a96fcee7aa1
MD5 c9a81dcabe30d055caca7db9affe0248
SHA1 0e13ed377b15349ddef95c6eed281b46a50bbb5f
SHA512 4bb62f936e94c207715aa9bf854dda8c5d0aa4a50d97ac09df98721344e0d0ed85f4c77f03e067bceb052fa908335ad1d34648a2afe5b3fac81873e55b49566a
SSDEEP 49152:ug2G6sHJRXRTV7PH/4lrezRSmI4/6SWOyg5eO09rAq3h7twjklRUsd8OLWB7C7Rq:WG6sZVjVRSmI4eg5ebrV35ijsdLWBERq
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat stormkitty default evasion rat spyware stealer themida trojan

Malware Config

Extracted

Family

asyncrat

Botnet

Default

127.0.0.1:6606
127.0.0.1:7707
127.0.0.1:8808
https://api.telegram.org/bot5980420064:AAHGrlOU2WsgF90Pcyz-L7wrGgC_Cj54k4Q/sendMessage?chat_id=806259874

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.
rat asyncrat
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 2 IoCs

resource	yara_rule
behavioral2/memory/4936-136-0x0000000000070000-0x00000000008A0000-memory.dmp	family_stormkitty
behavioral2/memory/4936-137-0x0000000000070000-0x00000000008A0000-memory.dmp	family_stormkitty

Async RAT payload 2 IoCs

rat

resource	yara_rule
behavioral2/memory/4936-136-0x0000000000070000-0x00000000008A0000-memory.dmp	asyncrat
behavioral2/memory/4936-137-0x0000000000070000-0x00000000008A0000-memory.dmp	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__	ws.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\SystemBiosVersion	ws.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	ws.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Themida packer 2 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/4936-136-0x0000000000070000-0x00000000008A0000-memory.dmp	themida
behavioral2/memory/4936-137-0x0000000000070000-0x00000000008A0000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

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

Drops desktop.ini file(s) 8 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\812e60bc910c437975b0ae3a114390a2\Admin@WIJBFSKT_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	ws.exe
File created	C:\Users\Admin\AppData\Local\812e60bc910c437975b0ae3a114390a2\Admin@WIJBFSKT_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini	ws.exe
File created	C:\Users\Admin\AppData\Local\812e60bc910c437975b0ae3a114390a2\Admin@WIJBFSKT_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini	ws.exe
File created	C:\Users\Admin\AppData\Local\812e60bc910c437975b0ae3a114390a2\Admin@WIJBFSKT_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	ws.exe
File opened for modification	C:\Users\Admin\AppData\Local\812e60bc910c437975b0ae3a114390a2\Admin@WIJBFSKT_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	ws.exe
File created	C:\Users\Admin\AppData\Local\812e60bc910c437975b0ae3a114390a2\Admin@WIJBFSKT_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	ws.exe
File opened for modification	C:\Users\Admin\AppData\Local\812e60bc910c437975b0ae3a114390a2\Admin@WIJBFSKT_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	ws.exe
File created	C:\Users\Admin\AppData\Local\812e60bc910c437975b0ae3a114390a2\Admin@WIJBFSKT_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	ws.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
47	icanhazip.com

Looks up geolocation information via web service
Uses a legitimate geolocation service to find the infected system's geolocation info.

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4936	ws.exe

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	ws.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	ws.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe
4936	ws.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4936	ws.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 4936 wrote to memory of 1028	4936	ws.exe	90
PID 4936 wrote to memory of 1028	4936	ws.exe	90
PID 4936 wrote to memory of 1028	4936	ws.exe	90
PID 1028 wrote to memory of 2920	1028	cmd.exe	92
PID 1028 wrote to memory of 2920	1028	cmd.exe	92
PID 1028 wrote to memory of 2920	1028	cmd.exe	92
PID 1028 wrote to memory of 3364	1028	cmd.exe	93
PID 1028 wrote to memory of 3364	1028	cmd.exe	93
PID 1028 wrote to memory of 3364	1028	cmd.exe	93
PID 1028 wrote to memory of 4668	1028	cmd.exe	94
PID 1028 wrote to memory of 4668	1028	cmd.exe	94
PID 1028 wrote to memory of 4668	1028	cmd.exe	94
PID 4936 wrote to memory of 3980	4936	ws.exe	95
PID 4936 wrote to memory of 3980	4936	ws.exe	95
PID 4936 wrote to memory of 3980	4936	ws.exe	95
PID 3980 wrote to memory of 1328	3980	cmd.exe	97
PID 3980 wrote to memory of 1328	3980	cmd.exe	97
PID 3980 wrote to memory of 1328	3980	cmd.exe	97
PID 3980 wrote to memory of 4768	3980	cmd.exe	98
PID 3980 wrote to memory of 4768	3980	cmd.exe	98
PID 3980 wrote to memory of 4768	3980	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\ws.exe
"C:\Users\Admin\AppData\Local\Temp\ws.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Drops desktop.ini file(s)
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4936
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1028
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:2920
- - C:\Windows\SysWOW64\netsh.exe
    netsh wlan show profile
    3⤵
    PID:3364
- - C:\Windows\SysWOW64\findstr.exe
    findstr All
    3⤵
    PID:4668
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3980
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:1328
- - C:\Windows\SysWOW64\netsh.exe
    netsh wlan show networks mode=bssid
    3⤵
    PID:4768

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Web Service

T1102

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

memory/4936-138-0x0000000000070000-0x00000000008A0000-memory.dmp

Download

memory/4936-142-0x0000000006AD0000-0x0000000007074000-memory.dmp

Download

memory/4936-141-0x0000000006480000-0x0000000006512000-memory.dmp

Download

memory/4936-140-0x0000000005780000-0x00000000057E6000-memory.dmp

Download

memory/4936-139-0x0000000076F00000-0x00000000770A3000-memory.dmp

Download

memory/4936-132-0x0000000000070000-0x00000000008A0000-memory.dmp

Download

memory/4936-137-0x0000000000070000-0x00000000008A0000-memory.dmp

Download

memory/4936-136-0x0000000000070000-0x00000000008A0000-memory.dmp

Download

memory/4936-135-0x0000000076F00000-0x00000000770A3000-memory.dmp

Download

memory/4936-150-0x00000000066B0000-0x00000000066BA000-memory.dmp

Download

memory/4936-151-0x0000000005C20000-0x0000000005C32000-memory.dmp

Download