asyncrat | 6166b3eaebbbdd68cb0ba54bbd9d4ab4f1fae7f79afc400c319cbb960c1c5053

General

Target
85fc8449d95c740fcf37c947f6476b41.exe
Size 45KB
Sample220112-ktxj2abhf6
SHA256 6166b3eaebbbdd68cb0ba54bbd9d4ab4f1fae7f79afc400c319cbb960c1c5053
MD5 85fc8449d95c740fcf37c947f6476b41
SHA1 f64598f17de28e54241aeab6a6ec8e63e6bcacbc
SHA512 ccc21c3080fcc585e0c0e9bc06653ab8ea38c88245e10a5c3ef8ef77ad519306bae77350546801785d68ddc294a38364dfb497db21dad1984cd77c8cad628271
MD5 SHA1 SHA512

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

141.94.112.3:9925

Mutex

AsyncMutex_6SI8OkPnk

Attributes

anti_vm
false
bsod
false
delay
3
install
true
install_file
services32.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 6 IoCs

rat

resource	yara_rule
behavioral2/memory/2524-115-0x0000000000730000-0x0000000000742000-memory.dmp	asyncrat
behavioral2/memory/2524-116-0x0000000000730000-0x0000000000742000-memory.dmp	asyncrat
behavioral2/files/0x000500000001ab3f-125.dat	asyncrat
behavioral2/files/0x000500000001ab3f-126.dat	asyncrat
behavioral2/memory/3972-127-0x00000000005C0000-0x00000000005D2000-memory.dmp	asyncrat
behavioral2/memory/3972-128-0x00000000005C0000-0x00000000005D2000-memory.dmp	asyncrat

Executes dropped EXE 1 IoCs

pid	Process
3972	services32.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
3488	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1484	timeout.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
2524	85fc8449d95c740fcf37c947f6476b41.exe
2524	85fc8449d95c740fcf37c947f6476b41.exe
2524	85fc8449d95c740fcf37c947f6476b41.exe
2524	85fc8449d95c740fcf37c947f6476b41.exe
2524	85fc8449d95c740fcf37c947f6476b41.exe
2524	85fc8449d95c740fcf37c947f6476b41.exe
2524	85fc8449d95c740fcf37c947f6476b41.exe
2524	85fc8449d95c740fcf37c947f6476b41.exe
2524	85fc8449d95c740fcf37c947f6476b41.exe
2524	85fc8449d95c740fcf37c947f6476b41.exe
2524	85fc8449d95c740fcf37c947f6476b41.exe
2524	85fc8449d95c740fcf37c947f6476b41.exe
2524	85fc8449d95c740fcf37c947f6476b41.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2524	85fc8449d95c740fcf37c947f6476b41.exe
Token: SeDebugPrivilege	3972	services32.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2524 wrote to memory of 764	2524	85fc8449d95c740fcf37c947f6476b41.exe	69
PID 2524 wrote to memory of 764	2524	85fc8449d95c740fcf37c947f6476b41.exe	69
PID 2524 wrote to memory of 764	2524	85fc8449d95c740fcf37c947f6476b41.exe	69
PID 2524 wrote to memory of 3948	2524	85fc8449d95c740fcf37c947f6476b41.exe	70
PID 2524 wrote to memory of 3948	2524	85fc8449d95c740fcf37c947f6476b41.exe	70
PID 2524 wrote to memory of 3948	2524	85fc8449d95c740fcf37c947f6476b41.exe	70
PID 764 wrote to memory of 3488	764	cmd.exe	73
PID 764 wrote to memory of 3488	764	cmd.exe	73
PID 764 wrote to memory of 3488	764	cmd.exe	73
PID 3948 wrote to memory of 1484	3948	cmd.exe	74
PID 3948 wrote to memory of 1484	3948	cmd.exe	74
PID 3948 wrote to memory of 1484	3948	cmd.exe	74
PID 3948 wrote to memory of 3972	3948	cmd.exe	75
PID 3948 wrote to memory of 3972	3948	cmd.exe	75
PID 3948 wrote to memory of 3972	3948	cmd.exe	75

C:\Users\Admin\AppData\Local\Temp\85fc8449d95c740fcf37c947f6476b41.exe
"C:\Users\Admin\AppData\Local\Temp\85fc8449d95c740fcf37c947f6476b41.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2524
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "services32" /tr '"C:\Users\Admin\AppData\Roaming\services32.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:764
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "services32" /tr '"C:\Users\Admin\AppData\Roaming\services32.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:3488
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3B01.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3948
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1484
- - C:\Users\Admin\AppData\Roaming\services32.exe
    "C:\Users\Admin\AppData\Roaming\services32.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:3972

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/2524-118-0x0000000005070000-0x000000000510C000-memory.dmp

Download

memory/2524-115-0x0000000000730000-0x0000000000742000-memory.dmp

Download

memory/2524-117-0x0000000005060000-0x0000000005061000-memory.dmp

Download

memory/2524-116-0x0000000000730000-0x0000000000742000-memory.dmp

Download

memory/3972-127-0x00000000005C0000-0x00000000005D2000-memory.dmp

Download

memory/3972-128-0x00000000005C0000-0x00000000005D2000-memory.dmp

Download

memory/3972-129-0x0000000004F20000-0x0000000004F21000-memory.dmp

Download

memory/3972-130-0x0000000004E30000-0x0000000004ECC000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads