asyncrat | 165289612527e1bfad340f7675a701bfe9608a3a4cfbfefe6a662574d5c05f90

General

Target

tool.exe
Size

45KB
MD5

b84e27e5b6cef684af80c868bf0b4ba0
SHA1

213d29cc30c693675911547643112d4c9a6c02d2
SHA256

165289612527e1bfad340f7675a701bfe9608a3a4cfbfefe6a662574d5c05f90
SHA512

3d5fb00a3793174b8f98e972c9ed7f322d1333dbda79a00676d015532e63eb69449453eda3d7e7de4d3026b49f3816ae4a12c4a2e434893d5aee52d9a3d00813
SSDEEP

768:7ugPNTjgkH7F7WUHw9pmo2q7Z0R3+418iZPIXzjbag13ibiWzqrLyXDkZBgkBDZg:7ugPNTcI42B3OiWX3bN1S2UwOzkZCSdg

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
Tool.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
behavioral2/files/0x000f000000023b4e-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-1-5-21-1121399784-3202166597-3503557106-1000\Control Panel\International\Geo\Nation	tool.exe

Executes dropped EXE 1 IoCs

pid	Process
428	Tool.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Tool.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tool.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5020	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
4804	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe
3248	tool.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3248	tool.exe
Token: SeDebugPrivilege	428	Tool.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3248 wrote to memory of 3216	3248	tool.exe	86
PID 3248 wrote to memory of 3216	3248	tool.exe	86
PID 3248 wrote to memory of 3216	3248	tool.exe	86
PID 3248 wrote to memory of 3060	3248	tool.exe	88
PID 3248 wrote to memory of 3060	3248	tool.exe	88
PID 3248 wrote to memory of 3060	3248	tool.exe	88
PID 3060 wrote to memory of 5020	3060	cmd.exe	90
PID 3060 wrote to memory of 5020	3060	cmd.exe	90
PID 3060 wrote to memory of 5020	3060	cmd.exe	90
PID 3216 wrote to memory of 4804	3216	cmd.exe	91
PID 3216 wrote to memory of 4804	3216	cmd.exe	91
PID 3216 wrote to memory of 4804	3216	cmd.exe	91
PID 3060 wrote to memory of 428	3060	cmd.exe	92
PID 3060 wrote to memory of 428	3060	cmd.exe	92
PID 3060 wrote to memory of 428	3060	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\tool.exe
"C:\Users\Admin\AppData\Local\Temp\tool.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3248
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Tool" /tr '"C:\Users\Admin\AppData\Roaming\Tool.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3216
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Tool" /tr '"C:\Users\Admin\AppData\Roaming\Tool.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4804
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB3EE.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3060
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5020
- - C:\Users\Admin\AppData\Roaming\Tool.exe
    "C:\Users\Admin\AppData\Roaming\Tool.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:428

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Tool.exe.log

Filesize
522B

MD5
acc9090417037dfa2a55b46ed86e32b8

SHA1
53fa6fb25fb3e88c24d2027aca6ae492b2800a4d

SHA256
2412679218bb0a7d05ceee32869bbb223619bde9966c4c460a68304a3367724b

SHA512
d51f7085ec147c708f446b9fb6923cd2fb64596d354ed929e125b30ace57c8cb3217589447a36960e5d3aea87a4e48aaa82c7509eced6d6c2cecd71fcfe3697b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpB3EE.tmp.bat

Filesize
148B

MD5
6812757af8fd051f17565ccccf833b46

SHA1
b26ea89f6723a2e1c9d0e43562196e8b6d1d9f9d

SHA256
c38675dd60a4bbd52a710fcc333127a8eafab89ff69cff8ea00e0e53d8986bd8

SHA512
d4ce4d033e64b9f037cbede5209161d20b2e89ee6149926655b7bb423eb00d53a5b9039e9a30eef99bedff48704551618c15f11545f003b5f482f1083a5b4d58

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

Filesize
45KB

MD5
b84e27e5b6cef684af80c868bf0b4ba0

SHA1
213d29cc30c693675911547643112d4c9a6c02d2

SHA256
165289612527e1bfad340f7675a701bfe9608a3a4cfbfefe6a662574d5c05f90

SHA512
3d5fb00a3793174b8f98e972c9ed7f322d1333dbda79a00676d015532e63eb69449453eda3d7e7de4d3026b49f3816ae4a12c4a2e434893d5aee52d9a3d00813

Download Submit
memory/428-14-0x00000000748B0000-0x0000000075060000-memory.dmp

Filesize
7.7MB

Download
memory/428-15-0x00000000748B0000-0x0000000075060000-memory.dmp

Filesize
7.7MB

Download
memory/3248-0-0x000000007496E000-0x000000007496F000-memory.dmp

Filesize
4KB

Download
memory/3248-1-0x0000000000FE0000-0x0000000000FF2000-memory.dmp

Filesize
72KB

Download
memory/3248-2-0x0000000074960000-0x0000000075110000-memory.dmp

Filesize
7.7MB

Download
memory/3248-3-0x00000000059A0000-0x0000000005A3C000-memory.dmp

Filesize
624KB

Download
memory/3248-8-0x0000000074960000-0x0000000075110000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads