asyncrat | 04f2eadb4cf1c2aa1748467be02e801bb3236d0b1cb4ee22edb01eb12abe0dd3

General

Target

Notepad+++.exe
Size

176KB
MD5

e811a2eea76cc805e26501c13ce781e4
SHA1

9588e37dbdaf367882202067b56a8b89550f16f4
SHA256

04f2eadb4cf1c2aa1748467be02e801bb3236d0b1cb4ee22edb01eb12abe0dd3
SHA512

a4d58e513d00543767d37a571e5f4a5b923a72d7963cc65f138c28c580854fc74a9e3fdad08102b2630f0ded48be01446132477c4ec211848bd9f201f692ccaf
SSDEEP

3072:LuLMTwip2wiMf3bjww24LZGjXpoGoByXPQs2UTXQ8yb7aFcUiSIvF68fJvx:LuLCs/E3bQ4ZGbpYByPT7lyvIcdSIvFX

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

Mutex

2MadfT525Jmp

Attributes

delay
3
install
true
install_file
epicgames.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

Processes:

resource	yara_rule
behavioral1/files/0x000b0000000122cf-14.dat	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

epicgames.exe

pid	Process
2604	epicgames.exe

Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid	Process
2688	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

Processes:

Notepad+++.execmd.execmd.exeschtasks.exetimeout.exeepicgames.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Notepad+++.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	epicgames.exe

Delays execution with timeout.exe 1 IoCs

evasion

Processes:

timeout.exe

pid	Process
2568	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

Processes:

schtasks.exe

pid	Process
2548	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

Notepad+++.exe

pid	Process
2656	Notepad+++.exe
2656	Notepad+++.exe
2656	Notepad+++.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Notepad+++.exeepicgames.exe

description	pid	Process
Token: SeDebugPrivilege	2656	Notepad+++.exe
Token: SeDebugPrivilege	2604	epicgames.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

Notepad+++.execmd.execmd.exe

description	pid	Process	procid_target
PID 2656 wrote to memory of 2588	2656	Notepad+++.exe	31
PID 2656 wrote to memory of 2588	2656	Notepad+++.exe	31
PID 2656 wrote to memory of 2588	2656	Notepad+++.exe	31
PID 2656 wrote to memory of 2588	2656	Notepad+++.exe	31
PID 2656 wrote to memory of 2688	2656	Notepad+++.exe	33
PID 2656 wrote to memory of 2688	2656	Notepad+++.exe	33
PID 2656 wrote to memory of 2688	2656	Notepad+++.exe	33
PID 2656 wrote to memory of 2688	2656	Notepad+++.exe	33
PID 2588 wrote to memory of 2548	2588	cmd.exe	35
PID 2588 wrote to memory of 2548	2588	cmd.exe	35
PID 2588 wrote to memory of 2548	2588	cmd.exe	35
PID 2588 wrote to memory of 2548	2588	cmd.exe	35
PID 2688 wrote to memory of 2568	2688	cmd.exe	36
PID 2688 wrote to memory of 2568	2688	cmd.exe	36
PID 2688 wrote to memory of 2568	2688	cmd.exe	36
PID 2688 wrote to memory of 2568	2688	cmd.exe	36
PID 2688 wrote to memory of 2604	2688	cmd.exe	37
PID 2688 wrote to memory of 2604	2688	cmd.exe	37
PID 2688 wrote to memory of 2604	2688	cmd.exe	37
PID 2688 wrote to memory of 2604	2688	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\Notepad+++.exe
"C:\Users\Admin\AppData\Local\Temp\Notepad+++.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2656
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "epicgames" /tr '"C:\Users\Admin\AppData\Roaming\epicgames.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2588
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "epicgames" /tr '"C:\Users\Admin\AppData\Roaming\epicgames.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2548
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp3BF7.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2688
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2568
- - C:\Users\Admin\AppData\Roaming\epicgames.exe
    "C:\Users\Admin\AppData\Roaming\epicgames.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2604

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\tmp3BF7.tmp.bat

Filesize
153B

MD5
1e80fa35fc42e597c4409eb57a53cadc

SHA1
02a8547408bc21bdbdbfaafe892a2f09db76e051

SHA256
4852f54cbd3034f11da1ae35aacbb3075e09666e9dd6496880f1adc9aa42ca7c

SHA512
7fad8a9bdd26cb5c430d3e2a3425c2b96059590224d875af3fcd213c29ee43462a01bde727b8bf5f54f3b6add2ab7ff7c9503b0e2e36e5ad82bd4cbcbf8c2864

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

Filesize
176KB

MD5
e811a2eea76cc805e26501c13ce781e4

SHA1
9588e37dbdaf367882202067b56a8b89550f16f4

SHA256
04f2eadb4cf1c2aa1748467be02e801bb3236d0b1cb4ee22edb01eb12abe0dd3

SHA512
a4d58e513d00543767d37a571e5f4a5b923a72d7963cc65f138c28c580854fc74a9e3fdad08102b2630f0ded48be01446132477c4ec211848bd9f201f692ccaf

Download Submit
memory/2604-16-0x0000000001140000-0x0000000001172000-memory.dmp

Filesize
200KB

Download
memory/2656-0-0x000000007421E000-0x000000007421F000-memory.dmp

Filesize
4KB

Download
memory/2656-1-0x0000000000AB0000-0x0000000000AE2000-memory.dmp

Filesize
200KB

Download
memory/2656-2-0x0000000074210000-0x00000000748FE000-memory.dmp

Filesize
6.9MB

Download
memory/2656-11-0x0000000074210000-0x00000000748FE000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads