asyncrat | 3d4fae60580e8c72482beea430dea8f3ed64e64bce3abe15150a26de0fffa7fe

General

Target

Client.exe
Size

98KB
MD5

32ea99984c4ac087a13d62ee493c0e5b
SHA1

b74425cc3b69bfe2f8b5ac6f5d0e661d8a646f5e
SHA256

3d4fae60580e8c72482beea430dea8f3ed64e64bce3abe15150a26de0fffa7fe
SHA512

5064c78c2b8e145105eac87c154a13eb939f8dd4eac59a09c48fd8703195cbc8ed979302b1b6bc5d5b552dc4baf6584175c986d1e721c6f8d55ecc6ae02f0e2f
SSDEEP

3072:oUvicxK8WmPMV2e9VdQsH1bf7eQhvWc3fBY:ocWmPMV2aesVbqKT3p

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

147.185.221.21:4449

147.185.221.21:6703

147.185.221.21:5552

Mutex

iyxtncnzhjunacoyx

Attributes

delay
1
install
true
install_file
EaxSet.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
behavioral2/files/0x000b00000002342f-11.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-1-5-21-1403246978-718555486-3105247137-1000\Control Panel\International\Geo\Nation	Client.exe

Executes dropped EXE 1 IoCs

pid	Process
4316	EaxSet.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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2676	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
2364	schtasks.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4784	Client.exe
4316	EaxSet.exe
4316	EaxSet.exe
4316	EaxSet.exe
4316	EaxSet.exe
4316	EaxSet.exe
4316	EaxSet.exe
4316	EaxSet.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4784	Client.exe
Token: SeDebugPrivilege	4316	EaxSet.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4316	EaxSet.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4784 wrote to memory of 4816	4784	Client.exe	88
PID 4784 wrote to memory of 4816	4784	Client.exe	88
PID 4784 wrote to memory of 1656	4784	Client.exe	89
PID 4784 wrote to memory of 1656	4784	Client.exe	89
PID 1656 wrote to memory of 2676	1656	cmd.exe	92
PID 1656 wrote to memory of 2676	1656	cmd.exe	92
PID 4816 wrote to memory of 2364	4816	cmd.exe	93
PID 4816 wrote to memory of 2364	4816	cmd.exe	93
PID 1656 wrote to memory of 4316	1656	cmd.exe	96
PID 1656 wrote to memory of 4316	1656	cmd.exe	96

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:4784
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "EaxSet" /tr '"C:\Users\Admin\AppData\Roaming\EaxSet.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4816
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "EaxSet" /tr '"C:\Users\Admin\AppData\Roaming\EaxSet.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2364
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp76B6.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1656
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2676
- - C:\Users\Admin\AppData\Roaming\EaxSet.exe
    "C:\Users\Admin\AppData\Roaming\EaxSet.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4316

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp76B6.tmp.bat

Filesize
150B

MD5
cb1400b1b6150e61ebf2281c42f80ca2

SHA1
5fc4711eee247f11c9f4dc1640885b02092bb8b5

SHA256
c0c209c92e6653c4e7fc505a4e51ffa29c72ee120c3e586bb319544661475e04

SHA512
5075f243c45b42211dfd5ee201ebd4273bd59067f181976a800b7f90a35806fd509d5d549b426d88f7b26d2124508a2ede152760dbd8838248806331b1a92df0

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

Filesize
98KB

MD5
32ea99984c4ac087a13d62ee493c0e5b

SHA1
b74425cc3b69bfe2f8b5ac6f5d0e661d8a646f5e

SHA256
3d4fae60580e8c72482beea430dea8f3ed64e64bce3abe15150a26de0fffa7fe

SHA512
5064c78c2b8e145105eac87c154a13eb939f8dd4eac59a09c48fd8703195cbc8ed979302b1b6bc5d5b552dc4baf6584175c986d1e721c6f8d55ecc6ae02f0e2f

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

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
memory/4316-14-0x000000001B670000-0x000000001B694000-memory.dmp

Filesize
144KB

Download
memory/4316-16-0x000000001B670000-0x000000001B694000-memory.dmp

Filesize
144KB

Download
memory/4316-17-0x000000001B670000-0x000000001B694000-memory.dmp

Filesize
144KB

Download
memory/4784-0-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4784-1-0x00007FFC53D00000-0x00007FFC53D9E000-memory.dmp

Filesize
632KB

Download
memory/4784-5-0x00007FFC53D00000-0x00007FFC53D9E000-memory.dmp

Filesize
632KB

Download
memory/4784-8-0x00007FFC53D00000-0x00007FFC53D9E000-memory.dmp

Filesize
632KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads