asyncrat | 0953e07352cc9da191595f0dc233d4c04070b507f3503cf7cd62e6bb9a680ec7

General

Target

1ab91c6b55ef7fe9426448d1b365e919.exe
Size

47KB
MD5

1ab91c6b55ef7fe9426448d1b365e919
SHA1

a47527efb62e08131fadd1c0c321d1405688acde
SHA256

0953e07352cc9da191595f0dc233d4c04070b507f3503cf7cd62e6bb9a680ec7
SHA512

bf940cda054dcf7a117296dfec96683ad3b6b1d0a431caa171741630145df33d6f57f30b647c8fbbd04648fc716fba9ca78a673398b522e06b3a37a489a0c87f

Score

10^/10

asyncrat rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

C2

cryptserver.hopto.org:4444

Mutex

AsyncMutex_6SI8OkPnk

Attributes

aes_key
eT1fq0d6dtymBNAUb6WLtqX26xciO5Sd
anti_detection
true
autorun
true
bdos
false
delay
Default
host
cryptserver.hopto.org
hwid
3
install_file
install_folder
%AppData%
mutex
AsyncMutex_6SI8OkPnk
pastebin_config
null
port
4444
version
0.5.7B

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 3 IoCs

rat

resource	yara_rule
behavioral1/files/0x00040000000130cb-70.dat	asyncrat
behavioral1/files/0x00040000000130cb-69.dat	asyncrat
behavioral1/files/0x00040000000130cb-72.dat	asyncrat

Executes dropped EXE 1 IoCs

pid	Process
1012	update.exe

Loads dropped DLL 1 IoCs

pid	Process
544	cmd.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
1636	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1840	timeout.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1652	1ab91c6b55ef7fe9426448d1b365e919.exe
1652	1ab91c6b55ef7fe9426448d1b365e919.exe
1652	1ab91c6b55ef7fe9426448d1b365e919.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1652	1ab91c6b55ef7fe9426448d1b365e919.exe
Token: SeDebugPrivilege	1012	update.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1652 wrote to memory of 1032	1652	1ab91c6b55ef7fe9426448d1b365e919.exe	30
PID 1652 wrote to memory of 1032	1652	1ab91c6b55ef7fe9426448d1b365e919.exe	30
PID 1652 wrote to memory of 1032	1652	1ab91c6b55ef7fe9426448d1b365e919.exe	30
PID 1652 wrote to memory of 1032	1652	1ab91c6b55ef7fe9426448d1b365e919.exe	30
PID 1652 wrote to memory of 544	1652	1ab91c6b55ef7fe9426448d1b365e919.exe	32
PID 1652 wrote to memory of 544	1652	1ab91c6b55ef7fe9426448d1b365e919.exe	32
PID 1652 wrote to memory of 544	1652	1ab91c6b55ef7fe9426448d1b365e919.exe	32
PID 1652 wrote to memory of 544	1652	1ab91c6b55ef7fe9426448d1b365e919.exe	32
PID 1032 wrote to memory of 1636	1032	cmd.exe	34
PID 1032 wrote to memory of 1636	1032	cmd.exe	34
PID 1032 wrote to memory of 1636	1032	cmd.exe	34
PID 1032 wrote to memory of 1636	1032	cmd.exe	34
PID 544 wrote to memory of 1840	544	cmd.exe	35
PID 544 wrote to memory of 1840	544	cmd.exe	35
PID 544 wrote to memory of 1840	544	cmd.exe	35
PID 544 wrote to memory of 1840	544	cmd.exe	35
PID 544 wrote to memory of 1012	544	cmd.exe	36
PID 544 wrote to memory of 1012	544	cmd.exe	36
PID 544 wrote to memory of 1012	544	cmd.exe	36
PID 544 wrote to memory of 1012	544	cmd.exe	36
PID 544 wrote to memory of 1012	544	cmd.exe	36
PID 544 wrote to memory of 1012	544	cmd.exe	36
PID 544 wrote to memory of 1012	544	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\1ab91c6b55ef7fe9426448d1b365e919.exe
"C:\Users\Admin\AppData\Local\Temp\1ab91c6b55ef7fe9426448d1b365e919.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1652
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "update" /tr '"C:\Users\Admin\AppData\Roaming\update.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1032
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "update" /tr '"C:\Users\Admin\AppData\Roaming\update.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:1636
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp8F64.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:544
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1840
- - C:\Users\Admin\AppData\Roaming\update.exe
    "C:\Users\Admin\AppData\Roaming\update.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1012

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1012-76-0x0000000004AB0000-0x0000000004AB1000-memory.dmp

Filesize
4KB

Download
memory/1012-73-0x0000000000C40000-0x0000000000C41000-memory.dmp

Filesize
4KB

Download
memory/1652-60-0x0000000000FE0000-0x0000000000FE1000-memory.dmp

Filesize
4KB

Download
memory/1652-63-0x0000000004860000-0x0000000004861000-memory.dmp

Filesize
4KB

Download
memory/1652-62-0x00000000754F1000-0x00000000754F3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads