asyncrat | 92ab9ed68950db61024eb5c5180f0019281a3bec96cd5a2f7305f450de064d4f | Triage

Analysis

max time kernel
26s
max time network
26s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
31-05-2024 04:12

Sharing

Reason

Machine shutdown

Report Analysis Logs

General

Target

System.exe
Size

3.4MB
MD5

fb19368b80bb083a67bea154f2e7f4a6
SHA1

7bb20b8ee40c9f94dd77b8cd35920b1ba651ae86
SHA256

92ab9ed68950db61024eb5c5180f0019281a3bec96cd5a2f7305f450de064d4f
SHA512

9fc041c4404602469314cf29cdae55d720bb26e8b37d774b13f7483a160c7fd0daea8d6274e7113a2c524630bf90d3b04513d04e19fe3f9cb216b44502f7c4f2
SSDEEP

49152:OnT6jNyvZdHzYjd3deChH/GBtNNwxry+3u1IRgQo37xcoMuFVhDb5Xqx:fQZdHod3ACBGBX+HgQvwV56x

Score

10^/10

asyncrat stormkitty default collection discovery evasion rat spyware stealer themida trojan

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.5

Botnet

Default

Mutex

umldzqgmsvrmiibib

Attributes

c2_url_file
https://paste.fo/raw/53957c5e1888
delay
1
install
true
install_file
Registry.exe
install_folder
%AppData%

aes.plain

Signatures

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

StormKitty payload 1 IoCs

resource	yara_rule
behavioral4/memory/3552-33-0x00000000082A0000-0x00000000083C2000-memory.dmp	family_stormkitty

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

Query Registry

Virtualization/Sandbox Evasion

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

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

System Information Discovery

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	System.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
T1552.001

Themida packer 2 IoCs

Detects Themida, an advanced Windows software protection system.

resource	yara_rule
behavioral4/memory/3552-10-0x00000000002A0000-0x0000000000BC0000-memory.dmp	themida
behavioral4/memory/3552-11-0x00000000002A0000-0x0000000000BC0000-memory.dmp	themida

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

Email Collection

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	System.exe
Key opened	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	System.exe
Key opened	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	System.exe

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

Checks whether UAC is enabled 1 TTPs 1 IoCs

System Information Discovery

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

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
3552	System.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4920	3552	WerFault.exe	81

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

Scheduled Task/Job

pid	Process
3492	schtasks.exe

Suspicious behavior: EnumeratesProcesses 53 IoCs

pid	Process
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe
3552	System.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3552	System.exe
Token: SeDebugPrivilege	3552	System.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3552	System.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3552 wrote to memory of 3556	3552	System.exe	85
PID 3552 wrote to memory of 3556	3552	System.exe	85
PID 3552 wrote to memory of 3556	3552	System.exe	85
PID 3556 wrote to memory of 3492	3556	cmd.exe	87
PID 3556 wrote to memory of 3492	3556	cmd.exe	87
PID 3556 wrote to memory of 3492	3556	cmd.exe	87

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	System.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	System.exe

C:\Users\Admin\AppData\Local\Temp\System.exe
"C:\Users\Admin\AppData\Local\Temp\System.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Accesses Microsoft Outlook profiles
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:3552
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Registry" /tr '"C:\Users\Admin\AppData\Roaming\Registry.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3556
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Registry" /tr '"C:\Users\Admin\AppData\Roaming\Registry.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:3492
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3552 -s 3632
  2⤵
  - Program crash
  PID:4920

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3552 -ip 3552
1⤵
PID:3960

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Scheduled Task/Job

Privilege Escalation

Scheduled Task/Job

Defense Evasion

Virtualization/Sandbox Evasion

Credential Access

Unsecured Credentials

Credentials In Files

Discovery

Query Registry

System Information Discovery

Virtualization/Sandbox Evasion

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\1a8454a5620e53d01459de122784f9be\Admin@NQPTTMRM_en-US\System\Process.txt

Filesize
1KB

MD5
dcbe1ac92d58c329e0676b09ce55fd29

SHA1
5c2478b72bc9fef2ab7a69c8644a41ea0b72be29

SHA256
7ae25d96fb9debcb0f4fa90be18e932dc478a4014ed7f55e52b80d9c882d8b5d

SHA512
95c338d17c5b4bf424c06f44f31b365574cabfadec6c84413af2274a16a2ccf9dd82ee2a446176d9c4b0dc9b76ad68e816cec02a12343ee907918e798f82ed82

Download Submit
C:\Users\Admin\AppData\Local\1a8454a5620e53d01459de122784f9be\Admin@NQPTTMRM_en-US\System\Process.txt

Filesize
3KB

MD5
2a37e0f192e9bb59f4c96ab266c16a28

SHA1
cb9066833bf176f1adf3526d4f8c09101d0e94f5

SHA256
c0894889de63bcf0f287bd748d5e1a963522d69232022c1926b8b4ff1b7f51b2

SHA512
dcad9c4c6309f097da9e0034b6aa3646fec3c976a8325f94a9158cae635492538cf7673a853615a041573bc7ed0c9c15f846ea620fb61fd7a8e30bce6a2b09e6

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp92A7.tmp.dat

Filesize
100KB

MD5
e0a9a4a78c1f99c5693c26d139b08762

SHA1
a20443b8e6e4a1fb1a11f4e0c6f48b89f263f069

SHA256
4075e9418dbc72c7dbb3978bd9e6f1283457e5aeb72389e2285c8c6bf8f61a27

SHA512
df1f9a9f4eab6086a407ba41dc67645bb1c0b0ac910f37d9b0012895e36b4e27ce00b214a8e519d70b612e1c0cb480828bb25350bba3086842eed7aca94611ac

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp92AA.tmp.dat

Filesize
152KB

MD5
73bd1e15afb04648c24593e8ba13e983

SHA1
4dd85ca46fcdf9d93f6b324f8bb0b5bb512a1b91

SHA256
aab0b201f392fef9fdff09e56a9d0ac33d0f68be95da270e6dab89bb1f971d8b

SHA512
6eb58fb41691894045569085bd64a83acd62277575ab002cf73d729bda4b6d43c36643a5fa336342e87a493326337ed43b8e5eaeae32f53210714699cb8dfac7

Download Submit
memory/3552-23-0x00000000002A0000-0x0000000000BC0000-memory.dmp

Filesize
9.1MB

Download
memory/3552-24-0x0000000076A60000-0x0000000076B50000-memory.dmp

Filesize
960KB

Download
memory/3552-5-0x0000000076A60000-0x0000000076B50000-memory.dmp

Filesize
960KB

Download
memory/3552-7-0x0000000076A60000-0x0000000076B50000-memory.dmp

Filesize
960KB

Download
memory/3552-10-0x00000000002A0000-0x0000000000BC0000-memory.dmp

Filesize
9.1MB

Download
memory/3552-11-0x00000000002A0000-0x0000000000BC0000-memory.dmp

Filesize
9.1MB

Download
memory/3552-12-0x0000000005B40000-0x00000000060E4000-memory.dmp

Filesize
5.6MB

Download
memory/3552-14-0x0000000006920000-0x00000000069B2000-memory.dmp

Filesize
584KB

Download
memory/3552-15-0x0000000006EB0000-0x0000000006EBA000-memory.dmp

Filesize
40KB

Download
memory/3552-18-0x00000000072A0000-0x000000000733C000-memory.dmp

Filesize
624KB

Download
memory/3552-19-0x0000000007370000-0x00000000073D6000-memory.dmp

Filesize
408KB

Download
memory/3552-20-0x0000000076A60000-0x0000000076B50000-memory.dmp

Filesize
960KB

Download
memory/3552-0-0x00000000002A0000-0x0000000000BC0000-memory.dmp

Filesize
9.1MB

Download
memory/3552-6-0x0000000076A60000-0x0000000076B50000-memory.dmp

Filesize
960KB

Download
memory/3552-25-0x0000000076A80000-0x0000000076A81000-memory.dmp

Filesize
4KB

Download
memory/3552-27-0x0000000076A60000-0x0000000076B50000-memory.dmp

Filesize
960KB

Download
memory/3552-28-0x0000000007D60000-0x0000000007DD6000-memory.dmp

Filesize
472KB

Download
memory/3552-29-0x0000000007DE0000-0x0000000007F14000-memory.dmp

Filesize
1.2MB

Download
memory/3552-30-0x0000000007D10000-0x0000000007D2E000-memory.dmp

Filesize
120KB

Download
memory/3552-31-0x0000000007F90000-0x0000000007F9A000-memory.dmp

Filesize
40KB

Download
memory/3552-32-0x0000000076A60000-0x0000000076B50000-memory.dmp

Filesize
960KB

Download
memory/3552-33-0x00000000082A0000-0x00000000083C2000-memory.dmp

Filesize
1.1MB

Download
memory/3552-57-0x00000000085C0000-0x0000000008914000-memory.dmp

Filesize
3.3MB

Download
memory/3552-58-0x0000000007FB0000-0x0000000007FFC000-memory.dmp

Filesize
304KB

Download
memory/3552-1-0x0000000076A80000-0x0000000076A81000-memory.dmp

Filesize
4KB

Download
memory/3552-2-0x0000000076A60000-0x0000000076B50000-memory.dmp

Filesize
960KB

Download
memory/3552-3-0x0000000076A60000-0x0000000076B50000-memory.dmp

Filesize
960KB

Download
memory/3552-4-0x0000000076A60000-0x0000000076B50000-memory.dmp

Filesize
960KB

Download