asyncrat | 21c633fa72ea32c1f8920b24c12a84cf456ef171b75da64febbffec5ccb606ee

General

Target

CustomCT.exe
Size

47KB
MD5

577a559e5a5c96662301372fd8bacdc5
SHA1

b24c9dd5e5a268d9c3ae5f01499abe1b24999529
SHA256

21c633fa72ea32c1f8920b24c12a84cf456ef171b75da64febbffec5ccb606ee
SHA512

b3292f420a0de03ac593ff07bcf0b45d71035ca5c89380215c8c03dd7fc41e3bb603004e29239045a67b3d44bdd8194b627d0e94eeb2b4322db70474cf059be2
SSDEEP

768:ouea1TFBA3VWU1/fhcvmo2qjmI03lgtnwv7z7YPIM9G5d+KE0bFQyrqLAHXMwLQV:ouea1TFmq2cF47vd6G5d+MbFKAHcwLQV

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

2001:14ba:4850:e000::1a:6606

2001:14ba:4850:e000::1a:7707

2001:14ba:4850:e000::1a:8808

192.168.1.110:6606

192.168.1.110:7707

192.168.1.110:8808

192.168.1.1:6606

192.168.1.1:7707

192.168.1.1:8808

Mutex

Eo6yZUg4OeDL

Attributes

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

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x0004000000004ed7-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2768	CheatEngineCustom.exe

Loads dropped DLL 1 IoCs

pid	Process
3012	cmd.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CheatEngineCustom.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CustomCT.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1508	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
2732	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2172	CustomCT.exe
2172	CustomCT.exe
2172	CustomCT.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2172	CustomCT.exe
Token: SeDebugPrivilege	2768	CheatEngineCustom.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2172 wrote to memory of 2720	2172	CustomCT.exe	31
PID 2172 wrote to memory of 2720	2172	CustomCT.exe	31
PID 2172 wrote to memory of 2720	2172	CustomCT.exe	31
PID 2172 wrote to memory of 2720	2172	CustomCT.exe	31
PID 2172 wrote to memory of 3012	2172	CustomCT.exe	33
PID 2172 wrote to memory of 3012	2172	CustomCT.exe	33
PID 2172 wrote to memory of 3012	2172	CustomCT.exe	33
PID 2172 wrote to memory of 3012	2172	CustomCT.exe	33
PID 2720 wrote to memory of 2732	2720	cmd.exe	35
PID 2720 wrote to memory of 2732	2720	cmd.exe	35
PID 2720 wrote to memory of 2732	2720	cmd.exe	35
PID 2720 wrote to memory of 2732	2720	cmd.exe	35
PID 3012 wrote to memory of 1508	3012	cmd.exe	36
PID 3012 wrote to memory of 1508	3012	cmd.exe	36
PID 3012 wrote to memory of 1508	3012	cmd.exe	36
PID 3012 wrote to memory of 1508	3012	cmd.exe	36
PID 3012 wrote to memory of 2768	3012	cmd.exe	37
PID 3012 wrote to memory of 2768	3012	cmd.exe	37
PID 3012 wrote to memory of 2768	3012	cmd.exe	37
PID 3012 wrote to memory of 2768	3012	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\CustomCT.exe
"C:\Users\Admin\AppData\Local\Temp\CustomCT.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2172
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "CheatEngineCustom" /tr '"C:\Users\Admin\AppData\Roaming\CheatEngineCustom.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2720
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "CheatEngineCustom" /tr '"C:\Users\Admin\AppData\Roaming\CheatEngineCustom.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2732
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpF0B5.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3012
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1508
- - C:\Users\Admin\AppData\Roaming\CheatEngineCustom.exe
    "C:\Users\Admin\AppData\Roaming\CheatEngineCustom.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2768

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

System Information Discovery

1

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\tmpF0B5.tmp.bat

Filesize
161B

MD5
f858e1cbea156e438b61ede7cd60f4b1

SHA1
a76d05a5da22ee93a65fb4059b14974ad03b8e8a

SHA256
59c5a9d77ceeb516c88a41604d3c0f0c82d35be378b1c682df8d5d1a7d3850fb

SHA512
11580492f797eab69f5c5e0d2f866e0fdc84d402a9820b1f6d457b14b4dbd2c47bb36513eea4dff85074886dbcf57cf4fd038d222784bf7ee5e62059a8c39aa8

Download Submit
\Users\Admin\AppData\Roaming\CheatEngineCustom.exe

Filesize
47KB

MD5
577a559e5a5c96662301372fd8bacdc5

SHA1
b24c9dd5e5a268d9c3ae5f01499abe1b24999529

SHA256
21c633fa72ea32c1f8920b24c12a84cf456ef171b75da64febbffec5ccb606ee

SHA512
b3292f420a0de03ac593ff07bcf0b45d71035ca5c89380215c8c03dd7fc41e3bb603004e29239045a67b3d44bdd8194b627d0e94eeb2b4322db70474cf059be2

Download Submit
memory/2172-0-0x0000000074CBE000-0x0000000074CBF000-memory.dmp

Filesize
4KB

Download
memory/2172-1-0x0000000000C80000-0x0000000000C92000-memory.dmp

Filesize
72KB

Download
memory/2172-2-0x0000000074CB0000-0x000000007539E000-memory.dmp

Filesize
6.9MB

Download
memory/2172-11-0x0000000074CB0000-0x000000007539E000-memory.dmp

Filesize
6.9MB

Download
memory/2768-16-0x0000000000910000-0x0000000000922000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads