asyncrat | e6c80a400d8611263b6c06633bedb0a4f84fabf2f4697a8f8f8c76a60d2af47b

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
07-08-2024 13:40

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General

Target

Client.exe
Size

74KB
MD5

6b057c57fdae4bb8d0ca5ce6e661ab4c
SHA1

57b9b5c40c57774f4fd229dda126242615ffa5ec
SHA256

e6c80a400d8611263b6c06633bedb0a4f84fabf2f4697a8f8f8c76a60d2af47b
SHA512

6f78df837ff19703bf7843bce3a46cbd60d29e67d0a153659f4ae18f46378e0aa18502d783e57ad5a146e6c2cf9b99f0e0bc7aac56846a682ffa9a547eb10e49
SSDEEP

1536:2UKkcx9pXCTyPMVWe9VdQuDI6H1bf/kmMLQzcmLVclN:2UDcx958yPMVWe9VdQsH1bfRoQ/BY

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

192.168.100.63:4449

Mutex

Attributes

delay
3
install
true
install_file
spoofer.exe
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

resource	yara_rule
behavioral1/files/0x000b0000000233b9-12.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	Client.exe

Executes dropped EXE 1 IoCs

pid	Process
3088	spoofer.exe

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

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A	taskmgr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName	taskmgr.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3756	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2668	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
1484	Client.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe
3088	spoofer.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	1484	Client.exe
Token: SeDebugPrivilege	3088	spoofer.exe
Token: SeDebugPrivilege	2420	taskmgr.exe
Token: SeSystemProfilePrivilege	2420	taskmgr.exe
Token: SeCreateGlobalPrivilege	2420	taskmgr.exe
Token: 33	2420	taskmgr.exe
Token: SeIncBasePriorityPrivilege	2420	taskmgr.exe

Suspicious use of FindShellTrayWindow 30 IoCs

pid	Process
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe

Suspicious use of SendNotifyMessage 30 IoCs

pid	Process
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe
2420	taskmgr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3088	spoofer.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1484 wrote to memory of 2760	1484	Client.exe	88
PID 1484 wrote to memory of 2760	1484	Client.exe	88
PID 1484 wrote to memory of 2028	1484	Client.exe	89
PID 1484 wrote to memory of 2028	1484	Client.exe	89
PID 2028 wrote to memory of 3756	2028	cmd.exe	92
PID 2028 wrote to memory of 3756	2028	cmd.exe	92
PID 2760 wrote to memory of 2668	2760	cmd.exe	93
PID 2760 wrote to memory of 2668	2760	cmd.exe	93
PID 2028 wrote to memory of 3088	2028	cmd.exe	95
PID 2028 wrote to memory of 3088	2028	cmd.exe	95

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

C:\Users\Admin\AppData\Local\Temp\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1484
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "spoofer" /tr '"C:\Users\Admin\AppData\Roaming\spoofer.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2760
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "spoofer" /tr '"C:\Users\Admin\AppData\Roaming\spoofer.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2668
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpBD35.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2028
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3756
- - C:\Users\Admin\AppData\Roaming\spoofer.exe
    "C:\Users\Admin\AppData\Roaming\spoofer.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:3088

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:2420

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpBD35.tmp.bat

Filesize
151B

MD5
76acddd0b48fa8eab4f2a1478b0b1689

SHA1
a8089e35376598d021779a55c9d88bf322c33918

SHA256
63d811247edba734f4d5d1374a43158d58e3583311cc75d54943379bd2298dca

SHA512
3e0044b729c4631a12ee234dd051bef983ad2d10bd62ce597826953b5718bee2e0c4205b7387bb7a8727890101f0b9514527a66d3e7800db83b4c4f2e753a331

Download Submit
C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
C:\Users\Admin\AppData\Roaming\spoofer.exe

Filesize
74KB

MD5
6b057c57fdae4bb8d0ca5ce6e661ab4c

SHA1
57b9b5c40c57774f4fd229dda126242615ffa5ec

SHA256
e6c80a400d8611263b6c06633bedb0a4f84fabf2f4697a8f8f8c76a60d2af47b

SHA512
6f78df837ff19703bf7843bce3a46cbd60d29e67d0a153659f4ae18f46378e0aa18502d783e57ad5a146e6c2cf9b99f0e0bc7aac56846a682ffa9a547eb10e49

Download Submit
memory/1484-0-0x00007FFB17773000-0x00007FFB17775000-memory.dmp

Filesize
8KB

Download
memory/1484-1-0x00000000002C0000-0x00000000002D8000-memory.dmp

Filesize
96KB

Download
memory/1484-3-0x00007FFB17770000-0x00007FFB18231000-memory.dmp

Filesize
10.8MB

Download
memory/1484-6-0x00007FFB17770000-0x00007FFB18231000-memory.dmp

Filesize
10.8MB

Download
memory/1484-10-0x00007FFB17770000-0x00007FFB18231000-memory.dmp

Filesize
10.8MB

Download
memory/2420-15-0x0000025C1D900000-0x0000025C1D901000-memory.dmp

Filesize
4KB

Download
memory/2420-17-0x0000025C1D900000-0x0000025C1D901000-memory.dmp

Filesize
4KB

Download
memory/2420-16-0x0000025C1D900000-0x0000025C1D901000-memory.dmp

Filesize
4KB

Download
memory/2420-27-0x0000025C1D900000-0x0000025C1D901000-memory.dmp

Filesize
4KB

Download
memory/2420-26-0x0000025C1D900000-0x0000025C1D901000-memory.dmp

Filesize
4KB

Download
memory/2420-25-0x0000025C1D900000-0x0000025C1D901000-memory.dmp

Filesize
4KB

Download
memory/2420-24-0x0000025C1D900000-0x0000025C1D901000-memory.dmp

Filesize
4KB

Download
memory/2420-23-0x0000025C1D900000-0x0000025C1D901000-memory.dmp

Filesize
4KB

Download
memory/2420-21-0x0000025C1D900000-0x0000025C1D901000-memory.dmp

Filesize
4KB

Download
memory/2420-22-0x0000025C1D900000-0x0000025C1D901000-memory.dmp

Filesize
4KB

Download