asyncrat | 884eacb6f51be1e6eba1296aece06baccd3f600f258494fef2dfcc34fd257ccd

General

Target

Client.exe
Size

63KB
MD5

4ae421ab5dc26aad7211a5bcc6ae89f2
SHA1

90f1c09a58087d15688db7bf63ae889d8b453751
SHA256

884eacb6f51be1e6eba1296aece06baccd3f600f258494fef2dfcc34fd257ccd
SHA512

0b9689d6718749b03a38d3f681cb62f70eb96438a24ad0ca0177ffa53c70bebe8bc3e28ef46df5165baaf11a876df3fe27f5ece785f748ac2b467d79a51eb1c2
SSDEEP

768:a2C46poI3iPgqUi79JKWcXveeObMbNCl1+6SCv7mqb2nIpwH1oV7Go8GdZVc6KN:aEIo5neeiMl8GbbXwZGdZVclN

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

127.0.0.1:8848

127.0.0.1:54817

Mutex

roaroaroaraoroaroaraoraoraoarororrohrorororoaroaaoaoaoaroaroar

Attributes

delay
1
install
true
install_file
windows defender firewall.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

rat

resource	yara_rule
behavioral1/files/0x0010000000013439-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2840	windows defender firewall.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

evasion

pid	Process
2564	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
2812	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2352	Client.exe
2352	Client.exe
2352	Client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2352	Client.exe
Token: SeDebugPrivilege	2840	windows defender firewall.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2352 wrote to memory of 2288	2352	Client.exe	31
PID 2352 wrote to memory of 2288	2352	Client.exe	31
PID 2352 wrote to memory of 2288	2352	Client.exe	31
PID 2352 wrote to memory of 2780	2352	Client.exe	32
PID 2352 wrote to memory of 2780	2352	Client.exe	32
PID 2352 wrote to memory of 2780	2352	Client.exe	32
PID 2288 wrote to memory of 2812	2288	cmd.exe	35
PID 2288 wrote to memory of 2812	2288	cmd.exe	35
PID 2288 wrote to memory of 2812	2288	cmd.exe	35
PID 2780 wrote to memory of 2564	2780	cmd.exe	36
PID 2780 wrote to memory of 2564	2780	cmd.exe	36
PID 2780 wrote to memory of 2564	2780	cmd.exe	36
PID 2780 wrote to memory of 2840	2780	cmd.exe	37
PID 2780 wrote to memory of 2840	2780	cmd.exe	37
PID 2780 wrote to memory of 2840	2780	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:2352
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2288
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2812
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpE476.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2780
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2564
- - C:\Users\Admin\AppData\Roaming\windows defender firewall.exe
    "C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2840

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmpE476.tmp.bat

Filesize
169B

MD5
ff78f22204408cc25d05ad795368247e

SHA1
a81122d282e190aa92476c1cc6830440f71c5a68

SHA256
770cc5ec838cba08ddfdf28fd514c29d14bd567bfbb7a84ad8cf18c6c29f496b

SHA512
45bedfb78318fabf7f621f7c173d29f9130fd13ce2996c1831d0344d060389a746a9b0a9672cf1f7b0ae5a8ed145662fd86b142afaf3c26544ad4fe249cba65b

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

Filesize
63KB

MD5
4ae421ab5dc26aad7211a5bcc6ae89f2

SHA1
90f1c09a58087d15688db7bf63ae889d8b453751

SHA256
884eacb6f51be1e6eba1296aece06baccd3f600f258494fef2dfcc34fd257ccd

SHA512
0b9689d6718749b03a38d3f681cb62f70eb96438a24ad0ca0177ffa53c70bebe8bc3e28ef46df5165baaf11a876df3fe27f5ece785f748ac2b467d79a51eb1c2

Download Submit
memory/2352-0-0x000007FEF5D53000-0x000007FEF5D54000-memory.dmp

Filesize
4KB

Download
memory/2352-1-0x0000000000160000-0x0000000000176000-memory.dmp

Filesize
88KB

Download
memory/2352-2-0x000007FEF5D50000-0x000007FEF673C000-memory.dmp

Filesize
9.9MB

Download
memory/2352-3-0x000007FEF5D50000-0x000007FEF673C000-memory.dmp

Filesize
9.9MB

Download
memory/2352-12-0x000007FEF5D50000-0x000007FEF673C000-memory.dmp

Filesize
9.9MB

Download
memory/2840-17-0x0000000000F40000-0x0000000000F56000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads