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
behavioral1/files/0x0008000000015fa3-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2748	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
2788	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
2332	schtasks.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1996	Client.exe
1996	Client.exe
1996	Client.exe
2748	EaxSet.exe
2748	EaxSet.exe
2748	EaxSet.exe
2748	EaxSet.exe
2748	EaxSet.exe
2748	EaxSet.exe
2748	EaxSet.exe
2748	EaxSet.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1996	Client.exe
Token: SeDebugPrivilege	2748	EaxSet.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2748	EaxSet.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1996 wrote to memory of 1884	1996	Client.exe	31
PID 1996 wrote to memory of 1884	1996	Client.exe	31
PID 1996 wrote to memory of 1884	1996	Client.exe	31
PID 1996 wrote to memory of 2016	1996	Client.exe	32
PID 1996 wrote to memory of 2016	1996	Client.exe	32
PID 1996 wrote to memory of 2016	1996	Client.exe	32
PID 1884 wrote to memory of 2332	1884	cmd.exe	35
PID 1884 wrote to memory of 2332	1884	cmd.exe	35
PID 1884 wrote to memory of 2332	1884	cmd.exe	35
PID 2016 wrote to memory of 2788	2016	cmd.exe	36
PID 2016 wrote to memory of 2788	2016	cmd.exe	36
PID 2016 wrote to memory of 2788	2016	cmd.exe	36
PID 2016 wrote to memory of 2748	2016	cmd.exe	37
PID 2016 wrote to memory of 2748	2016	cmd.exe	37
PID 2016 wrote to memory of 2748	2016	cmd.exe	37

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⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1996
- 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:1884
- - 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:2332
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpCB79.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2016
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2788
- - 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:2748

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

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab4240.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpCB79.tmp.bat

Filesize
150B

MD5
3d415abf103a3b32ce38f0b921b7fb79

SHA1
23a2219f310caada0b3f2d22121c5e4b27dc76e3

SHA256
f9d099e52bd132011dae644f962a7b3862894ed897988eafa6c16da20a34e8db

SHA512
8633440c0a7487bc320880a9fe7c92322155b11347093d8f3dfbaf19364e9fb54a3a42657567625d25b3d782da7e97dd79447349b784267c910a6bc21686749a

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/1996-0-0x000007FEF5643000-0x000007FEF5644000-memory.dmp

Filesize
4KB

Download
memory/1996-1-0x0000000001130000-0x000000000114E000-memory.dmp

Filesize
120KB

Download
memory/1996-3-0x000007FEF5640000-0x000007FEF602C000-memory.dmp

Filesize
9.9MB

Download
memory/1996-13-0x000007FEF5640000-0x000007FEF602C000-memory.dmp

Filesize
9.9MB

Download
memory/1996-14-0x000007FEF5640000-0x000007FEF602C000-memory.dmp

Filesize
9.9MB

Download
memory/2748-18-0x0000000000990000-0x00000000009AE000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads