asyncrat | 929bd74e00c56ec0935d5390a89dd4942abc1f3511a267034739fff0491e350b | Triage

Analysis

max time kernel
147s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
07-12-2024 14:44

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General

Target

3.exe
Size

48KB
MD5

3d9e11f133404b0de3f4fd7e375e3fbf
SHA1

1da48c172f95eb337a3b3427f6360d112abf907e
SHA256

929bd74e00c56ec0935d5390a89dd4942abc1f3511a267034739fff0491e350b
SHA512

77aa948b664f957851bb33d2276df7315d5f05abe912bed1214f6e37270a525799fb04cacd0e17a6c07fff55f96a32222ecf71fcf2104e71de153c64de8f147c
SSDEEP

768:eVVFxILHtFp+BirI7Vf2ki6Y8Yb4gepge+6BvEgK/JYZVc6KN:eV27Eorzbvt6BnkJYZVclN

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

127.0.0.1:8848

127.0.0.1:52039

dfsgmnhsrf23456623423456-52039.portmap.host:8848

dfsgmnhsrf23456623423456-52039.portmap.host:52039

Mutex

DcRatMutex_qwqdanchunxinsfd,mhbm gdfvg

Attributes

delay
1
install
true
install_file
windows defender firewall required.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Async RAT payload 1 IoCs

resource	yara_rule
behavioral3/files/0x001e00000002ab40-10.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
4224	windows defender firewall required.exe

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

pid	Process
3124	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

pid	Process
3628	schtasks.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
2808	3.exe
2808	3.exe
2808	3.exe
2808	3.exe
2808	3.exe
2808	3.exe
2808	3.exe
2808	3.exe
2808	3.exe
2808	3.exe
2808	3.exe
2808	3.exe
2808	3.exe
2808	3.exe
2808	3.exe
2808	3.exe
2808	3.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2808	3.exe
Token: SeDebugPrivilege	4224	windows defender firewall required.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2808 wrote to memory of 6136	2808	3.exe	77
PID 2808 wrote to memory of 6136	2808	3.exe	77
PID 2808 wrote to memory of 5600	2808	3.exe	79
PID 2808 wrote to memory of 5600	2808	3.exe	79
PID 6136 wrote to memory of 3628	6136	cmd.exe	81
PID 6136 wrote to memory of 3628	6136	cmd.exe	81
PID 5600 wrote to memory of 3124	5600	cmd.exe	82
PID 5600 wrote to memory of 3124	5600	cmd.exe	82
PID 5600 wrote to memory of 4224	5600	cmd.exe	83
PID 5600 wrote to memory of 4224	5600	cmd.exe	83

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\3.exe
"C:\Users\Admin\AppData\Local\Temp\3.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2808
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall required" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:6136
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall required" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3628
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpAF2C.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5600
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3124
- - C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe
    "C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4224

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Scheduled Task

Persistence

Scheduled Task/Job

Scheduled Task

Privilege Escalation

Scheduled Task/Job

Scheduled Task

Defense Evasion

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\tmpAF2C.tmp.bat

Filesize
178B

MD5
7b8d1bb0d651d1cd302361a571581084

SHA1
f50fb29d848ae5a8f5536d82c302efe7c9c1bde8

SHA256
07da2b7db4f09cd907bbb015ce2a88c2883d8e5cb6a27d256be3a21d873f967d

SHA512
62e03087e919431b26b0074282f30197c94ded31f9f9cd566e02b5bd190d0177c9a6ddbd2c0f96c3640bb4c6fb91c09a153f5f132d993e5580d46d443e216e97

Download Submit
C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe

Filesize
48KB

MD5
3d9e11f133404b0de3f4fd7e375e3fbf

SHA1
1da48c172f95eb337a3b3427f6360d112abf907e

SHA256
929bd74e00c56ec0935d5390a89dd4942abc1f3511a267034739fff0491e350b

SHA512
77aa948b664f957851bb33d2276df7315d5f05abe912bed1214f6e37270a525799fb04cacd0e17a6c07fff55f96a32222ecf71fcf2104e71de153c64de8f147c

Download Submit
memory/2808-0-0x00007FFAABF13000-0x00007FFAABF15000-memory.dmp

Filesize
8KB

Download
memory/2808-1-0x0000000000130000-0x0000000000142000-memory.dmp

Filesize
72KB

Download
memory/2808-2-0x00007FFAABF10000-0x00007FFAAC9D2000-memory.dmp

Filesize
10.8MB

Download
memory/2808-7-0x00007FFAABF10000-0x00007FFAAC9D2000-memory.dmp

Filesize
10.8MB

Download