asyncrat | 6afa8f79af9fd9ec79a3ebd4fd0932c496afdd4766df779a796e9ee502553562

General

Target
a988a32ab0e1124c9ea84347ace12a12.exe
Size 615KB
Sample211228-cmwp6addb5
SHA256 6afa8f79af9fd9ec79a3ebd4fd0932c496afdd4766df779a796e9ee502553562
MD5 a988a32ab0e1124c9ea84347ace12a12
SHA1 d4169490d688e7d36aeeeb93988623aef4376d83
SHA512 72c96e355173e33a33a3b29516b7e59e1b7835de4045d818302674cbefc654b284e6afc16a4bee9760336ee670800c251b6e71afbbdaee62f97887ae91cbcef3
MD5 SHA1 SHA512

Score

10^/10

asyncrat rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.6D

C2

milla.publicvm.com:6606
milla.publicvm.com:7707
milla.publicvm.com:8808

Mutex

qryrotocjrgqb

Attributes

anti_vm
false
bsod
false
delay
1
install
true
install_file
microsofteedge.exe
install_folder
%AppData%
pastebin_config
null

aes.plain

Signatures

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

Async RAT payload 2 IoCs

rat

resource	yara_rule
behavioral1/memory/976-56-0x00000000002F0000-0x0000000000302000-memory.dmp	asyncrat
behavioral1/memory/364-69-0x0000000000250000-0x0000000000262000-memory.dmp	asyncrat

Executes dropped EXE 1 IoCs

pid	Process
364	microsofteedge.exe

Loads dropped DLL 1 IoCs

pid	Process
704	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
1132	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1360	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
976	a988a32ab0e1124c9ea84347ace12a12.exe
976	a988a32ab0e1124c9ea84347ace12a12.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	976	a988a32ab0e1124c9ea84347ace12a12.exe
Token: SeDebugPrivilege	364	microsofteedge.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 976 wrote to memory of 580	976	a988a32ab0e1124c9ea84347ace12a12.exe	27
PID 976 wrote to memory of 580	976	a988a32ab0e1124c9ea84347ace12a12.exe	27
PID 976 wrote to memory of 580	976	a988a32ab0e1124c9ea84347ace12a12.exe	27
PID 976 wrote to memory of 580	976	a988a32ab0e1124c9ea84347ace12a12.exe	27
PID 976 wrote to memory of 704	976	a988a32ab0e1124c9ea84347ace12a12.exe	29
PID 976 wrote to memory of 704	976	a988a32ab0e1124c9ea84347ace12a12.exe	29
PID 976 wrote to memory of 704	976	a988a32ab0e1124c9ea84347ace12a12.exe	29
PID 976 wrote to memory of 704	976	a988a32ab0e1124c9ea84347ace12a12.exe	29
PID 580 wrote to memory of 1132	580	cmd.exe	31
PID 580 wrote to memory of 1132	580	cmd.exe	31
PID 580 wrote to memory of 1132	580	cmd.exe	31
PID 580 wrote to memory of 1132	580	cmd.exe	31
PID 704 wrote to memory of 1360	704	cmd.exe	32
PID 704 wrote to memory of 1360	704	cmd.exe	32
PID 704 wrote to memory of 1360	704	cmd.exe	32
PID 704 wrote to memory of 1360	704	cmd.exe	32
PID 704 wrote to memory of 364	704	cmd.exe	33
PID 704 wrote to memory of 364	704	cmd.exe	33
PID 704 wrote to memory of 364	704	cmd.exe	33
PID 704 wrote to memory of 364	704	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\a988a32ab0e1124c9ea84347ace12a12.exe
"C:\Users\Admin\AppData\Local\Temp\a988a32ab0e1124c9ea84347ace12a12.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:976
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /ru system /rl highest /tn a988a32ab0e1124c9ea84347ace12a12 /tr '"C:\Users\Admin\AppData\Roaming\microsofteedge.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:580
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /ru system /rl highest /tn a988a32ab0e1124c9ea84347ace12a12 /tr '"C:\Users\Admin\AppData\Roaming\microsofteedge.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:1132
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpF5B4.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:704
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1360
- - C:\Users\Admin\AppData\Roaming\microsofteedge.exe
    "C:\Users\Admin\AppData\Roaming\microsofteedge.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:364

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

Replay Monitor

Loading Replay Monitor...

Downloads

memory/364-70-0x0000000004C70000-0x0000000004C71000-memory.dmp

Download

memory/364-69-0x0000000000250000-0x0000000000262000-memory.dmp

Download

memory/364-68-0x0000000000010000-0x00000000000B0000-memory.dmp

Download

memory/364-67-0x0000000000010000-0x00000000000B0000-memory.dmp

Download

memory/976-54-0x0000000000840000-0x00000000008E0000-memory.dmp

Download

memory/976-57-0x0000000004C90000-0x0000000004C91000-memory.dmp

Download

memory/976-56-0x00000000002F0000-0x0000000000302000-memory.dmp

Download

memory/976-55-0x0000000000840000-0x00000000008E0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads