asyncrat | e3f245020bcf6beaca39b8cc9eb06b3db7f209356e765f41d8306ad56735e944 | Triage

Resubmissions

Analysis

max time kernel
109s
max time network
112s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
24-05-2024 12:19

Sharing

Report Analysis Logs

General

Target

e3f245020bcf6beaca39b8cc9eb06b3db7f209356e765f41d8306ad56735e944.exe
Size

231KB
MD5

144f1b1c4b9cdad97d8dd1a3a89e7ea1
SHA1

1a11d76a6ab646a0d699efa0e5fc71de6e5af92c
SHA256

e3f245020bcf6beaca39b8cc9eb06b3db7f209356e765f41d8306ad56735e944
SHA512

2697bde82afdef6b3e9079e9add7a9026fffec2a9093932d6c05256fe73df0ef9a2fac4f26de28e2b5d87cc7dd0651dac80baa2a3841148409ab2c3ea32b6882
SSDEEP

6144:TZ+geAPqybJnO5AbpbO9jhJdrz8U6n4eOP07NyGyG2qYlw5S3U19:T4FvybJNpazzfoyG

Score

10^/10

asyncrat default persistence rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

66.235.168.242:3232

Attributes

delay
1
install
true
install_file
Loaader.exe
install_folder
%AppData%

aes.plain

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

66.235.168.242:4449

Mutex

scgofjarww

Attributes

delay
1
install
true
install_file
Loader.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 2 IoCs

resource	yara_rule
behavioral4/files/0x000b000000028d68-6.dat	family_asyncrat
behavioral4/files/0x000500000002a97f-18.dat	family_asyncrat

Executes dropped EXE 5 IoCs

pid	Process
3384	Client.exe
4248	Infected.exe
2432	WinDefend.exe
1948	Loader.exe
4692	Loaader.exe

Adds Run key to start application 2 TTPs 1 IoCs

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1696768468-2170909707-4198977321-1000\Software\Microsoft\Windows\CurrentVersion\Run\YourAppName = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WinDefend.exe"	WinDefend.exe

Looks up external IP address via web service 2 IoCs

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

flow	ioc
1	api64.ipify.org
2	api64.ipify.org

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 2 IoCs

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

Scheduled Task/Job

pid	Process
1916	schtasks.exe
384	schtasks.exe

Delays execution with timeout.exe 2 IoCs

pid	Process
2384	timeout.exe
1180	timeout.exe

Suspicious behavior: EnumeratesProcesses 52 IoCs

pid	Process
4248	Infected.exe
4248	Infected.exe
4248	Infected.exe
4248	Infected.exe
4248	Infected.exe
4248	Infected.exe
4248	Infected.exe
4248	Infected.exe
4248	Infected.exe
4248	Infected.exe
4248	Infected.exe
4248	Infected.exe
4248	Infected.exe
4248	Infected.exe
4248	Infected.exe
4248	Infected.exe
4248	Infected.exe
3384	Client.exe
3384	Client.exe
3384	Client.exe
3384	Client.exe
3384	Client.exe
3384	Client.exe
3384	Client.exe
3384	Client.exe
3384	Client.exe
3384	Client.exe
3384	Client.exe
3384	Client.exe
3384	Client.exe
3384	Client.exe
3384	Client.exe
3384	Client.exe
3384	Client.exe
1948	Loader.exe
1948	Loader.exe
1948	Loader.exe
1948	Loader.exe
1948	Loader.exe
1948	Loader.exe
1948	Loader.exe
1948	Loader.exe
1948	Loader.exe
1948	Loader.exe
1948	Loader.exe
1948	Loader.exe
1948	Loader.exe
1948	Loader.exe
1948	Loader.exe
1948	Loader.exe
1948	Loader.exe
1948	Loader.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3384	Client.exe
Token: SeDebugPrivilege	2432	WinDefend.exe
Token: SeDebugPrivilege	4248	Infected.exe
Token: SeDebugPrivilege	1948	Loader.exe
Token: SeDebugPrivilege	4692	Loaader.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1948	Loader.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2732 wrote to memory of 3384	2732	e3f245020bcf6beaca39b8cc9eb06b3db7f209356e765f41d8306ad56735e944.exe	79
PID 2732 wrote to memory of 3384	2732	e3f245020bcf6beaca39b8cc9eb06b3db7f209356e765f41d8306ad56735e944.exe	79
PID 2732 wrote to memory of 4248	2732	e3f245020bcf6beaca39b8cc9eb06b3db7f209356e765f41d8306ad56735e944.exe	80
PID 2732 wrote to memory of 4248	2732	e3f245020bcf6beaca39b8cc9eb06b3db7f209356e765f41d8306ad56735e944.exe	80
PID 2732 wrote to memory of 2432	2732	e3f245020bcf6beaca39b8cc9eb06b3db7f209356e765f41d8306ad56735e944.exe	81
PID 2732 wrote to memory of 2432	2732	e3f245020bcf6beaca39b8cc9eb06b3db7f209356e765f41d8306ad56735e944.exe	81
PID 2732 wrote to memory of 2432	2732	e3f245020bcf6beaca39b8cc9eb06b3db7f209356e765f41d8306ad56735e944.exe	81
PID 4248 wrote to memory of 5064	4248	Infected.exe	83
PID 4248 wrote to memory of 5064	4248	Infected.exe	83
PID 4248 wrote to memory of 4800	4248	Infected.exe	85
PID 4248 wrote to memory of 4800	4248	Infected.exe	85
PID 5064 wrote to memory of 1916	5064	cmd.exe	87
PID 5064 wrote to memory of 1916	5064	cmd.exe	87
PID 4800 wrote to memory of 1180	4800	cmd.exe	88
PID 4800 wrote to memory of 1180	4800	cmd.exe	88
PID 3384 wrote to memory of 436	3384	Client.exe	89
PID 3384 wrote to memory of 436	3384	Client.exe	89
PID 3384 wrote to memory of 3756	3384	Client.exe	90
PID 3384 wrote to memory of 3756	3384	Client.exe	90
PID 436 wrote to memory of 384	436	cmd.exe	93
PID 436 wrote to memory of 384	436	cmd.exe	93
PID 3756 wrote to memory of 2384	3756	cmd.exe	94
PID 3756 wrote to memory of 2384	3756	cmd.exe	94
PID 3756 wrote to memory of 1948	3756	cmd.exe	95
PID 3756 wrote to memory of 1948	3756	cmd.exe	95
PID 4800 wrote to memory of 4692	4800	cmd.exe	96
PID 4800 wrote to memory of 4692	4800	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\e3f245020bcf6beaca39b8cc9eb06b3db7f209356e765f41d8306ad56735e944.exe
"C:\Users\Admin\AppData\Local\Temp\e3f245020bcf6beaca39b8cc9eb06b3db7f209356e765f41d8306ad56735e944.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2732
- C:\Users\Admin\AppData\Local\Temp\Client.exe
  "C:\Users\Admin\AppData\Local\Temp\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3384
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Loader" /tr '"C:\Users\Admin\AppData\Roaming\Loader.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:436
  - - C:\Windows\system32\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "Loader" /tr '"C:\Users\Admin\AppData\Roaming\Loader.exe"'
      4⤵
      Creates scheduled task(s)
      PID:384
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5A26.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3756
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:2384
  - - C:\Users\Admin\AppData\Roaming\Loader.exe
      "C:\Users\Admin\AppData\Roaming\Loader.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:1948
- C:\Users\Admin\AppData\Local\Temp\Infected.exe
  "C:\Users\Admin\AppData\Local\Temp\Infected.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4248
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Loaader" /tr '"C:\Users\Admin\AppData\Roaming\Loaader.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:5064
  - - C:\Windows\system32\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "Loaader" /tr '"C:\Users\Admin\AppData\Roaming\Loaader.exe"'
      4⤵
      Creates scheduled task(s)
      PID:1916
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5999.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4800
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:1180
  - - C:\Users\Admin\AppData\Roaming\Loaader.exe
      "C:\Users\Admin\AppData\Roaming\Loaader.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      PID:4692
- C:\Users\Admin\AppData\Local\Temp\WinDefend.exe
  "C:\Users\Admin\AppData\Local\Temp\WinDefend.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  PID:2432

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Client.exe

Filesize
74KB

MD5
7ac0adf482250172280defec7a7054da

SHA1
20a25f0da68c309d062c4628ead8b6f377ac7969

SHA256
3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5

SHA512
d03d033b931f3d39f95a1ec1cdc7d9014783f11b2438c265dd72c0bc34f9d5ced534a38c7c1c88ff930868fd9cf60521dd556b5c486c5cf364f798f39215a1aa

Download Submit
C:\Users\Admin\AppData\Local\Temp\Infected.exe

Filesize
63KB

MD5
b8d455465260a845db35492fda5a8888

SHA1
287b0ba049ad8f3be802d2224efb86dba72d3221

SHA256
a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282

SHA512
5dba43ae31420de362593752e8ff491afbe8d20f183f6b95e6962ea1e637c7bf3bd50b5213e4d928a96b85d9b54841ee697798b0089624b13ef7eded826cd86a

Download Submit
C:\Users\Admin\AppData\Local\Temp\WinDefend.exe

Filesize
87KB

MD5
5fc6a541845fdafb597ddfb98fa28b54

SHA1
22e5dd50ddd71bc39c812db0f9b164ca10c556dd

SHA256
64e4dedb36812766c522c79cae57b7f3b2694efaa396151d4117a70282166117

SHA512
f174e4ccc89d4a7473001a9153a9c3d63bedd393dda1ea3be171768b7587846722ad07445adeafa52ef54802a8ac84eb33ab1799248dcbf7db60aa4f311da5e3

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp5999.tmp.bat

Filesize
151B

MD5
214f56f4f412cb405dd315cb537cbd73

SHA1
72bca49227e12270709949f54eab1833461f65ee

SHA256
6d221086fadceaf08d9156fce7e5144cb94623c10609afa6992c5aa2d3fdec5d

SHA512
1bc8b27f8bd490ce72f45c89994085b0372034ff44796221640009faf49f73b75bf93d9f0bcead4ca74acbde39532b77798dd11b19d5d7842e34caa89e6a1cee

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp5A26.tmp.bat

Filesize
150B

MD5
5fa7c1faf943285c6b98ee9a5e3c08f3

SHA1
dfdc5d7cef43677a5791a5a188d044f0be445dc1

SHA256
fc0b04f3410a0bb82e07f80a85208cfb7fe922cee3eab6ab2184fadd94a435da

SHA512
ce9ea2aba98fc3bde5f28224bc73c6aac7eecee70e708c6f00b8555f58f37aa3991a39bee230643d084e49af70b68cdaea2ac144785431fc7d0267d7952a881b

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

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
C:\Users\Public\SSSS.log

Filesize
4KB

MD5
96daa4d79b9b6c3d77ac3bed24df925d

SHA1
e8fb727c74b785cc4d195aca5b6dd14e801e25c3

SHA256
cf52ecaae7967836c37df1075905926723eff09b67772c249d3d1fd4b066a428

SHA512
59e60b8e15379574fb2e52646de991593958d2bad44e025d01e2dab253723a8de98889c1c2961abfc38220bd8dd36ad2f404c1975de88c629db939481b1edde7

Download Submit
memory/2432-44-0x0000000002590000-0x0000000002596000-memory.dmp

Filesize
24KB

Download
memory/2432-47-0x0000000004CE0000-0x0000000004CEA000-memory.dmp

Filesize
40KB

Download
memory/2432-46-0x0000000004EA0000-0x0000000004F32000-memory.dmp

Filesize
584KB

Download
memory/2432-45-0x0000000009930000-0x0000000009ED6000-memory.dmp

Filesize
5.6MB

Download
memory/2432-43-0x0000000000320000-0x000000000033E000-memory.dmp

Filesize
120KB

Download
memory/2732-42-0x00007FFD020C0000-0x00007FFD02B82000-memory.dmp

Filesize
10.8MB

Download
memory/2732-0-0x0000000000ED0000-0x0000000000F10000-memory.dmp

Filesize
256KB

Download
memory/2732-13-0x00007FFD020C0000-0x00007FFD02B82000-memory.dmp

Filesize
10.8MB

Download
memory/2732-1-0x00007FFD020C3000-0x00007FFD020C5000-memory.dmp

Filesize
8KB

Download
memory/3384-25-0x00007FFD020C0000-0x00007FFD02B82000-memory.dmp

Filesize
10.8MB

Download
memory/3384-35-0x0000000000120000-0x0000000000138000-memory.dmp

Filesize
96KB

Download
memory/3384-58-0x00007FFD020C0000-0x00007FFD02B82000-memory.dmp

Filesize
10.8MB

Download
memory/4248-41-0x00007FFD020C0000-0x00007FFD02B82000-memory.dmp

Filesize
10.8MB

Download
memory/4248-52-0x00007FFD020C0000-0x00007FFD02B82000-memory.dmp

Filesize
10.8MB

Download
memory/4248-26-0x0000000000070000-0x0000000000086000-memory.dmp

Filesize
88KB

Download