asyncrat | 4476d0eb2a47cb9bfe3155abf0a1603de727dd127f4df099b344df56c22c0d67

Analysis

max time kernel
599s
max time network
529s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
31-07-2024 15:08

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

231.exe
Size

63KB
MD5

1b8eea1226cd913da97c0c0b8a806b18
SHA1

4320bde806e4fb5792be6bfb2e0b45ae30033fa0
SHA256

4476d0eb2a47cb9bfe3155abf0a1603de727dd127f4df099b344df56c22c0d67
SHA512

70fca344d74efe3e1bf9268e36bd2aac698e69cde340559f5a0df603bf996d06f6b60920cf02ecf19c8532f6a6d6210a4c9ad54a61ddbf12541ae0cfee3da7f1
SSDEEP

1536:zZgPH9F4s1THE6HTIiTEulumGbb+wAe+EhGG0kpqKmY7:zZgPH9F4sBHLTIiTnGbb+xmuvz

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.2

Botnet

Default

stores-less.gl.at.ply.gg:45080

Mutex

AtomRatMutex_penka

Attributes

delay
1
install
true
install_file
piskat.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/0x000900000001ab57-11.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
1756	piskat.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\rescache\_merged\4183903823\2290032291.pri	taskmgr.exe
File created	C:\Windows\rescache\_merged\1601268389\715946058.pri	taskmgr.exe

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

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_QEMU&Prod_HARDDISK\4&215468a5&0&000000	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_QEMU&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A	taskmgr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_QEMU&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName	taskmgr.exe

Delays execution with timeout.exe 2 IoCs

evasion

pid	Process
2380	timeout.exe
1800	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
4720	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2448	231.exe
2448	231.exe
2448	231.exe
2448	231.exe
2448	231.exe
2448	231.exe
2448	231.exe
2448	231.exe
2448	231.exe
2448	231.exe
2448	231.exe
2448	231.exe
2448	231.exe
2448	231.exe
2448	231.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
868	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2448	231.exe
Token: SeDebugPrivilege	868	taskmgr.exe
Token: SeSystemProfilePrivilege	868	taskmgr.exe
Token: SeCreateGlobalPrivilege	868	taskmgr.exe
Token: SeDebugPrivilege	1756	piskat.exe

Suspicious use of FindShellTrayWindow 64 IoCs

pid	Process
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe

Suspicious use of SendNotifyMessage 64 IoCs

pid	Process
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe
868	taskmgr.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2448 wrote to memory of 1372	2448	231.exe	75
PID 2448 wrote to memory of 1372	2448	231.exe	75
PID 2448 wrote to memory of 4696	2448	231.exe	77
PID 2448 wrote to memory of 4696	2448	231.exe	77
PID 1372 wrote to memory of 4720	1372	cmd.exe	79
PID 1372 wrote to memory of 4720	1372	cmd.exe	79
PID 4696 wrote to memory of 2380	4696	cmd.exe	80
PID 4696 wrote to memory of 2380	4696	cmd.exe	80
PID 4696 wrote to memory of 1756	4696	cmd.exe	81
PID 4696 wrote to memory of 1756	4696	cmd.exe	81
PID 1756 wrote to memory of 1988	1756	piskat.exe	84
PID 1756 wrote to memory of 1988	1756	piskat.exe	84
PID 1756 wrote to memory of 1420	1756	piskat.exe	85
PID 1756 wrote to memory of 1420	1756	piskat.exe	85
PID 1420 wrote to memory of 1800	1420	cmd.exe	88
PID 1420 wrote to memory of 1800	1420	cmd.exe	88
PID 1988 wrote to memory of 812	1988	cmd.exe	89
PID 1988 wrote to memory of 812	1988	cmd.exe	89

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\231.exe
"C:\Users\Admin\AppData\Local\Temp\231.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2448
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "piskat" /tr '"C:\Users\Admin\AppData\Roaming\piskat.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1372
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "piskat" /tr '"C:\Users\Admin\AppData\Roaming\piskat.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4720
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7F13.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4696
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2380
- - C:\Users\Admin\AppData\Roaming\piskat.exe
    "C:\Users\Admin\AppData\Roaming\piskat.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1756
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /delete /f /tn "piskat"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1988
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /delete /f /tn "piskat"
        5⤵
        
        PID:812
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9F05.tmp.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1420
    - - C:\Windows\system32\timeout.exe
        
        timeout 3
        5⤵
        Delays execution with timeout.exe
        
        PID:1800

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
1⤵
- Drops file in Windows directory
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:868

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

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp7F13.tmp.bat

Filesize
150B

MD5
33f2e682c09506708c90a031a6908fa1

SHA1
8816fc2831d8f8543d11d89ce0839df01871041e

SHA256
2a83781f3e417f80e0e77d906687572c4adefd25a5732fed9a2918da58f0d404

SHA512
22a79bfbe69353810872a7406d7225c89ef0ca7f64d1561f5c35e093983bddb31aaa8aa874c36a2db4ac72116f8d4d40b8655cf8563e10aedde86ee9017a4651

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9F05.tmp.bat

Filesize
155B

MD5
b8169c1b7e90d66943021efb945a6be5

SHA1
f714ca12e1084eb710199d8181bf4de558488c52

SHA256
8d80af3926845bd689d6f3366ae0ea01ef75b012203cd5dff4a3ca8e306eba5f

SHA512
286a774971d8f7aa4c9d552cbf2785c5d58d3844f27322a34fdf866d6539963802276fd0c0ed8442953a553ee77d7bd58ad51791052a3261cda7345bc230b466

Download Submit
C:\Users\Admin\AppData\Roaming\piskat.exe

Filesize
63KB

MD5
1b8eea1226cd913da97c0c0b8a806b18

SHA1
4320bde806e4fb5792be6bfb2e0b45ae30033fa0

SHA256
4476d0eb2a47cb9bfe3155abf0a1603de727dd127f4df099b344df56c22c0d67

SHA512
70fca344d74efe3e1bf9268e36bd2aac698e69cde340559f5a0df603bf996d06f6b60920cf02ecf19c8532f6a6d6210a4c9ad54a61ddbf12541ae0cfee3da7f1

Download Submit
memory/1756-26-0x000001B388A00000-0x000001B388A76000-memory.dmp

Filesize
472KB

Download
memory/1756-27-0x000001B386F60000-0x000001B386FC4000-memory.dmp

Filesize
400KB

Download
memory/1756-28-0x000001B386FF0000-0x000001B38700E000-memory.dmp

Filesize
120KB

Download
memory/2448-0-0x0000025A90A80000-0x0000025A90A96000-memory.dmp

Filesize
88KB

Download
memory/2448-1-0x00007FFE3CEF3000-0x00007FFE3CEF4000-memory.dmp

Filesize
4KB

Download
memory/2448-2-0x00007FFE3CEF0000-0x00007FFE3D8DC000-memory.dmp

Filesize
9.9MB

Download
memory/2448-3-0x00007FFE3CEF0000-0x00007FFE3D8DC000-memory.dmp

Filesize
9.9MB

Download
memory/2448-8-0x00007FFE3CEF0000-0x00007FFE3D8DC000-memory.dmp

Filesize
9.9MB

Download