asyncrat | ea568b732e66798cdc9f97f736cc77142d08e1996b7f5d6a996d9b941083e03c

General

Target

Server.exe
Size

45KB
MD5

d3bb7d0cce1e7a1a1884f25d2a5370d2
SHA1

ebc5d5104e8de6a53aef7f5d50f44925070a4085
SHA256

ea568b732e66798cdc9f97f736cc77142d08e1996b7f5d6a996d9b941083e03c
SHA512

dcc630bd534043caf4c54e5da7fe2daccc64e213b0d2f4dd8bbc13174de3768802e1ea603a1f0584687d0d20d750e96dcd9ec2b46401a442d6a3943972142e06
SSDEEP

768:hu4f9TskvpDWUPANxmo2qbgY8Vq0H9OPIozjbmgX3iEzO/uoXXgxMqJvsZzBDZ7r:hu4f9TswI27ss3o3b5XS8O/XJ7d7r

Score

10^/10

asyncrat services discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

services

C2

shadowdx.duckdns.org:8808

Mutex

windows services

Attributes

delay
3
install
true
install_file
services.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/0x0007000000023ca2-11.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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	Server.exe

Executes dropped EXE 1 IoCs

pid	Process
3164	services.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	Server.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	services.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1412	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
1128	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe
2320	Server.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2320	Server.exe
Token: SeDebugPrivilege	3164	services.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2320 wrote to memory of 1052	2320	Server.exe	83
PID 2320 wrote to memory of 1052	2320	Server.exe	83
PID 2320 wrote to memory of 1052	2320	Server.exe	83
PID 2320 wrote to memory of 900	2320	Server.exe	85
PID 2320 wrote to memory of 900	2320	Server.exe	85
PID 2320 wrote to memory of 900	2320	Server.exe	85
PID 900 wrote to memory of 1412	900	cmd.exe	87
PID 900 wrote to memory of 1412	900	cmd.exe	87
PID 900 wrote to memory of 1412	900	cmd.exe	87
PID 1052 wrote to memory of 1128	1052	cmd.exe	88
PID 1052 wrote to memory of 1128	1052	cmd.exe	88
PID 1052 wrote to memory of 1128	1052	cmd.exe	88
PID 900 wrote to memory of 3164	900	cmd.exe	93
PID 900 wrote to memory of 3164	900	cmd.exe	93
PID 900 wrote to memory of 3164	900	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\Server.exe
"C:\Users\Admin\AppData\Local\Temp\Server.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2320
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "services" /tr '"C:\Users\Admin\AppData\Roaming\services.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1052
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "services" /tr '"C:\Users\Admin\AppData\Roaming\services.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1128
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC42B.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:900
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1412
- - C:\Users\Admin\AppData\Roaming\services.exe
    "C:\Users\Admin\AppData\Roaming\services.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:3164

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\tmpC42B.tmp.bat

Filesize
152B

MD5
b3aeea50a33d0f10c9fe5ed8a483b2d6

SHA1
57f3e9b1cec225cc2a4ad65535cd48c62adf95cb

SHA256
7fb291698dd6d6c25f5381a853fc810a22b18db08989377267aa60e9b8bc3849

SHA512
f6b74d3cf1997905ff236cf1b56a49693e0ce53a662e5eb4cf4abe1585f1d0157c25c043151cf47ae0d5bb10acb7eacbaa61dcdf1a75c12ce74fb45679b6ed27

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

Filesize
45KB

MD5
d3bb7d0cce1e7a1a1884f25d2a5370d2

SHA1
ebc5d5104e8de6a53aef7f5d50f44925070a4085

SHA256
ea568b732e66798cdc9f97f736cc77142d08e1996b7f5d6a996d9b941083e03c

SHA512
dcc630bd534043caf4c54e5da7fe2daccc64e213b0d2f4dd8bbc13174de3768802e1ea603a1f0584687d0d20d750e96dcd9ec2b46401a442d6a3943972142e06

Download Submit
memory/2320-0-0x000000007531E000-0x000000007531F000-memory.dmp

Filesize
4KB

Download
memory/2320-1-0x0000000000EC0000-0x0000000000ED2000-memory.dmp

Filesize
72KB

Download
memory/2320-2-0x0000000075310000-0x0000000075AC0000-memory.dmp

Filesize
7.7MB

Download
memory/2320-3-0x0000000005900000-0x000000000599C000-memory.dmp

Filesize
624KB

Download
memory/2320-8-0x0000000075310000-0x0000000075AC0000-memory.dmp

Filesize
7.7MB

Download
memory/3164-13-0x0000000075260000-0x0000000075A10000-memory.dmp

Filesize
7.7MB

Download
memory/3164-14-0x0000000075260000-0x0000000075A10000-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