asyncrat | 3d1628fb4c4f00119992f91caa94a313f26a8490058a1cb3fc42850d46415e1b

General

Target

try.exe
Size

47KB
MD5

c6e12fefdec665d8ba5f2102f1329e3a
SHA1

fa2d30cfad462faa20a6a48f1b20db59c2d31bdc
SHA256

3d1628fb4c4f00119992f91caa94a313f26a8490058a1cb3fc42850d46415e1b
SHA512

ad0a6f3dcc08aa0f135ca777d186f1ed76df60cf580f76cd5257ded9b5d83712329d3ff0c1e3a5dd328503885fce65339e504778ab7e107bc02aa3563325fb54
SSDEEP

768:4uY69T3kH1jWUvTqRmo2qbfsvQQfCIVPIk4k2L0bsHVy+j/Mu3Ff0WQeMfSBDZ4x:4uY69T34y20Qf/ylrAbsHVhj/1f0rsdq

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

weak-onions-tap.loca.lt:6606

weak-onions-tap.loca.lt:7707

weak-onions-tap.loca.lt:8808

Mutex

6YwTvE25VuNs

Attributes

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

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x000c000000023b78-11.dat	family_asyncrat

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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	try.exe

Executes dropped EXE 1 IoCs

pid	Process
3448	roar.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	roar.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	try.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1924	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
3604	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe
2372	try.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2372	try.exe
Token: SeDebugPrivilege	3448	roar.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 3596	2372	try.exe	82
PID 2372 wrote to memory of 3596	2372	try.exe	82
PID 2372 wrote to memory of 3596	2372	try.exe	82
PID 2372 wrote to memory of 4740	2372	try.exe	84
PID 2372 wrote to memory of 4740	2372	try.exe	84
PID 2372 wrote to memory of 4740	2372	try.exe	84
PID 4740 wrote to memory of 1924	4740	cmd.exe	86
PID 4740 wrote to memory of 1924	4740	cmd.exe	86
PID 4740 wrote to memory of 1924	4740	cmd.exe	86
PID 3596 wrote to memory of 3604	3596	cmd.exe	87
PID 3596 wrote to memory of 3604	3596	cmd.exe	87
PID 3596 wrote to memory of 3604	3596	cmd.exe	87
PID 4740 wrote to memory of 3448	4740	cmd.exe	88
PID 4740 wrote to memory of 3448	4740	cmd.exe	88
PID 4740 wrote to memory of 3448	4740	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\try.exe
"C:\Users\Admin\AppData\Local\Temp\try.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2372
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "roar" /tr '"C:\Users\Admin\AppData\Roaming\roar.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3596
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "roar" /tr '"C:\Users\Admin\AppData\Roaming\roar.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3604
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB100.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4740
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1924
- - C:\Users\Admin\AppData\Roaming\roar.exe
    "C:\Users\Admin\AppData\Roaming\roar.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:3448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB100.tmp.bat

Filesize
148B

MD5
1c0fdc5197c0fbf8641bd5c1c02e52a5

SHA1
7c1521b6af8f6a333dd56826fad547fa68f2f79c

SHA256
32721515852bbba7a8d201667de894443866ec937439c22deee79851aab2075b

SHA512
47df48f9eaa54b5ba5671469e633f2ea93353687b570ebed1d4b5ac5b29e8f3d4949a05dcffbbae4125d495434468de393de4db960c26379c82594ae74fe7ec5

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

Filesize
47KB

MD5
c6e12fefdec665d8ba5f2102f1329e3a

SHA1
fa2d30cfad462faa20a6a48f1b20db59c2d31bdc

SHA256
3d1628fb4c4f00119992f91caa94a313f26a8490058a1cb3fc42850d46415e1b

SHA512
ad0a6f3dcc08aa0f135ca777d186f1ed76df60cf580f76cd5257ded9b5d83712329d3ff0c1e3a5dd328503885fce65339e504778ab7e107bc02aa3563325fb54

Download Submit
memory/2372-0-0x000000007498E000-0x000000007498F000-memory.dmp

Filesize
4KB

Download
memory/2372-1-0x00000000001E0000-0x00000000001F2000-memory.dmp

Filesize
72KB

Download
memory/2372-2-0x0000000074980000-0x0000000075130000-memory.dmp

Filesize
7.7MB

Download
memory/2372-3-0x0000000004BA0000-0x0000000004C3C000-memory.dmp

Filesize
624KB

Download
memory/2372-9-0x0000000074980000-0x0000000075130000-memory.dmp

Filesize
7.7MB

Download
memory/3448-13-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/3448-14-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads