asyncrat | 5969e616a32e7cb09dd32ddca0c37e989a6131edb5c4a7b4367400c3f0e8527e

General

Target
flemme.exe
Size 112KB
Sample240802-zrdfpsvdkf
SHA256 5969e616a32e7cb09dd32ddca0c37e989a6131edb5c4a7b4367400c3f0e8527e
MD5 2dd4a3e79a430fcf80e0c16c059c4c2c
SHA1 b32b851bb2746acfa2035d6765f7827e5880debb
SHA512 cae7ef83d8eb0f77d018dae6327b46cbb61e68623d64551492f883b9903a00ff410a9bda7c84f4348497e55b34490b315f855b95288e71710076cb246863a6a4
SSDEEP 3072:IucJTUUk2QGjf93SybKeYOQpiGU0tFsHEx:IucjNrr9CybEOq5
MD5 SHA1 SHA512 SSDEEP

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

Mutex

zou2AAxxuspP

Attributes

delay
3
install
true
install_file
executorroblox.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/0x000b000000016d58-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2616	executorroblox.exe

Loads dropped DLL 1 IoCs

pid	Process
2052	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	executorroblox.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	flemme.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
2748	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
2612	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2816	flemme.exe
2816	flemme.exe
2816	flemme.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2816	flemme.exe
Token: SeDebugPrivilege	2616	executorroblox.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2816 wrote to memory of 2788	2816	flemme.exe	30
PID 2816 wrote to memory of 2788	2816	flemme.exe	30
PID 2816 wrote to memory of 2788	2816	flemme.exe	30
PID 2816 wrote to memory of 2788	2816	flemme.exe	30
PID 2816 wrote to memory of 2052	2816	flemme.exe	32
PID 2816 wrote to memory of 2052	2816	flemme.exe	32
PID 2816 wrote to memory of 2052	2816	flemme.exe	32
PID 2816 wrote to memory of 2052	2816	flemme.exe	32
PID 2788 wrote to memory of 2612	2788	cmd.exe	34
PID 2788 wrote to memory of 2612	2788	cmd.exe	34
PID 2788 wrote to memory of 2612	2788	cmd.exe	34
PID 2788 wrote to memory of 2612	2788	cmd.exe	34
PID 2052 wrote to memory of 2748	2052	cmd.exe	35
PID 2052 wrote to memory of 2748	2052	cmd.exe	35
PID 2052 wrote to memory of 2748	2052	cmd.exe	35
PID 2052 wrote to memory of 2748	2052	cmd.exe	35
PID 2052 wrote to memory of 2616	2052	cmd.exe	36
PID 2052 wrote to memory of 2616	2052	cmd.exe	36
PID 2052 wrote to memory of 2616	2052	cmd.exe	36
PID 2052 wrote to memory of 2616	2052	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\flemme.exe
"C:\Users\Admin\AppData\Local\Temp\flemme.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2816
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "executorroblox" /tr '"C:\Users\Admin\AppData\Roaming\executorroblox.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2788
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "executorroblox" /tr '"C:\Users\Admin\AppData\Roaming\executorroblox.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2612
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp710B.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2052
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2748
- - C:\Users\Admin\AppData\Roaming\executorroblox.exe
    "C:\Users\Admin\AppData\Roaming\executorroblox.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2616

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

tmp710B.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp710B.tmp.bat
Size 158B
SHA256 406f40e06ca26782a78088119142933ab9571e1cf99789346fda78d5eb857b66
MD5 ffc68f80770d3404c7354e157f160362
SHA1 6fe4d4591f1aed31971c0a89d6500fca8cc7d87d
SHA512 aedab85ebf204811a9184e028794c2d7d38c3c3d9a9a65e242c088b40aad265e4f54d32ae85188f2cb78d7f3e6f9dfcea43023be71d6befdcc489163a7639064
MD5 SHA1 SHA512

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executorroblox.exe

Path \Users\Admin\AppData\Roaming\executorroblox.exe
Size 112KB
SHA256 5969e616a32e7cb09dd32ddca0c37e989a6131edb5c4a7b4367400c3f0e8527e
MD5 2dd4a3e79a430fcf80e0c16c059c4c2c
SHA1 b32b851bb2746acfa2035d6765f7827e5880debb
SHA512 cae7ef83d8eb0f77d018dae6327b46cbb61e68623d64551492f883b9903a00ff410a9bda7c84f4348497e55b34490b315f855b95288e71710076cb246863a6a4
SSDEEP 3072:IucJTUUk2QGjf93SybKeYOQpiGU0tFsHEx:IucjNrr9CybEOq5
MD5 SHA1 SHA512 SSDEEP

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memory/2616-16-0x00000000000A0000-0x00000000000C2000-memory.dmp

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memory/2816-0-0x0000000073CCE000-0x0000000073CCF000-memory.dmp

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memory/2816-1-0x00000000003B0000-0x00000000003D2000-memory.dmp

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memory/2816-2-0x0000000073CC0000-0x00000000743AE000-memory.dmp

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memory/2816-11-0x0000000073CC0000-0x00000000743AE000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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