asyncrat | 249dfba95037f8d27397f2b3e2b9d9ea4b4f031a959e52cb060e50fc20f07064

Analysis

max time kernel
137s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
23/03/2022, 09:36

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General

Target
STOREWEL INQ LIST.jpg.exe
Size 1.0MB
Sample220323-lk5pqagbfp
SHA256 249dfba95037f8d27397f2b3e2b9d9ea4b4f031a959e52cb060e50fc20f07064
MD5 8b88812eb53132685c1d44eb49971644
SHA1 348bfd3482c8841bca61972daed303194244734d
SHA512 95029e28dd12be05fd6e20e1571b0bb72076aa53290f20d75683f0b7672f048d7d7cad83fc0d274a4edace9dda78e97a5bf61039c41fe8125ce9c7adf9078298
MD5 SHA1 SHA512

Score

10^/10

asyncrat eloasync rat spyware stealer suricata

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Eloasync

185.19.85.136:6060

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
images.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
suricata

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/3444-139-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Executes dropped EXE 2 IoCs

pid	Process
3648	images.exe
2188	images.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	STOREWEL INQ LIST.jpg.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 224 set thread context of 3444	224	STOREWEL INQ LIST.jpg.exe	88
PID 3648 set thread context of 2188	3648	images.exe	98

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
3068	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3816	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe
3444	STOREWEL INQ LIST.jpg.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3444	STOREWEL INQ LIST.jpg.exe
Token: SeDebugPrivilege	2188	images.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 224 wrote to memory of 3444	224	STOREWEL INQ LIST.jpg.exe	88
PID 224 wrote to memory of 3444	224	STOREWEL INQ LIST.jpg.exe	88
PID 224 wrote to memory of 3444	224	STOREWEL INQ LIST.jpg.exe	88
PID 224 wrote to memory of 3444	224	STOREWEL INQ LIST.jpg.exe	88
PID 224 wrote to memory of 3444	224	STOREWEL INQ LIST.jpg.exe	88
PID 224 wrote to memory of 3444	224	STOREWEL INQ LIST.jpg.exe	88
PID 224 wrote to memory of 3444	224	STOREWEL INQ LIST.jpg.exe	88
PID 224 wrote to memory of 3444	224	STOREWEL INQ LIST.jpg.exe	88
PID 3444 wrote to memory of 2996	3444	STOREWEL INQ LIST.jpg.exe	91
PID 3444 wrote to memory of 2996	3444	STOREWEL INQ LIST.jpg.exe	91
PID 3444 wrote to memory of 2996	3444	STOREWEL INQ LIST.jpg.exe	91
PID 3444 wrote to memory of 2584	3444	STOREWEL INQ LIST.jpg.exe	93
PID 3444 wrote to memory of 2584	3444	STOREWEL INQ LIST.jpg.exe	93
PID 3444 wrote to memory of 2584	3444	STOREWEL INQ LIST.jpg.exe	93
PID 2996 wrote to memory of 3068	2996	cmd.exe	95
PID 2996 wrote to memory of 3068	2996	cmd.exe	95
PID 2996 wrote to memory of 3068	2996	cmd.exe	95
PID 2584 wrote to memory of 3816	2584	cmd.exe	96
PID 2584 wrote to memory of 3816	2584	cmd.exe	96
PID 2584 wrote to memory of 3816	2584	cmd.exe	96
PID 2584 wrote to memory of 3648	2584	cmd.exe	97
PID 2584 wrote to memory of 3648	2584	cmd.exe	97
PID 2584 wrote to memory of 3648	2584	cmd.exe	97
PID 3648 wrote to memory of 2188	3648	images.exe	98
PID 3648 wrote to memory of 2188	3648	images.exe	98
PID 3648 wrote to memory of 2188	3648	images.exe	98
PID 3648 wrote to memory of 2188	3648	images.exe	98
PID 3648 wrote to memory of 2188	3648	images.exe	98
PID 3648 wrote to memory of 2188	3648	images.exe	98
PID 3648 wrote to memory of 2188	3648	images.exe	98
PID 3648 wrote to memory of 2188	3648	images.exe	98

C:\Users\Admin\AppData\Local\Temp\STOREWEL INQ LIST.jpg.exe
"C:\Users\Admin\AppData\Local\Temp\STOREWEL INQ LIST.jpg.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:224
- C:\Users\Admin\AppData\Local\Temp\STOREWEL INQ LIST.jpg.exe
  "C:\Users\Admin\AppData\Local\Temp\STOREWEL INQ LIST.jpg.exe"
  2⤵
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3444
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "images" /tr '"C:\Users\Admin\AppData\Roaming\images.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2996
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "images" /tr '"C:\Users\Admin\AppData\Roaming\images.exe"'
      4⤵
      Creates scheduled task(s)
      PID:3068
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp306.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2584
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:3816
  - - C:\Users\Admin\AppData\Roaming\images.exe
      "C:\Users\Admin\AppData\Roaming\images.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:3648
    - - C:\Users\Admin\AppData\Roaming\images.exe
        
        "C:\Users\Admin\AppData\Roaming\images.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:2188

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/224-137-0x000000000D6C0000-0x000000000D75C000-memory.dmp

Download

memory/224-133-0x0000000000BC0000-0x0000000000CD0000-memory.dmp

Download

memory/224-136-0x00000000079F0000-0x00000000079FA000-memory.dmp

Download

memory/224-135-0x0000000007A50000-0x0000000007AE2000-memory.dmp

Download

memory/224-134-0x0000000007F60000-0x0000000008504000-memory.dmp

Download

memory/2188-155-0x0000000006AE0000-0x0000000006AFE000-memory.dmp

Download

memory/2188-154-0x0000000006A30000-0x0000000006AA6000-memory.dmp

Download

memory/2188-153-0x0000000005680000-0x00000000056E6000-memory.dmp

Download

memory/3444-139-0x0000000000400000-0x0000000000412000-memory.dmp

Download