asyncrat | 5969e616a32e7cb09dd32ddca0c37e989a6131edb5c4a7b4367400c3f0e8527e

General

Target

flemme.exe
Size

112KB
MD5

2dd4a3e79a430fcf80e0c16c059c4c2c
SHA1

b32b851bb2746acfa2035d6765f7827e5880debb
SHA256

5969e616a32e7cb09dd32ddca0c37e989a6131edb5c4a7b4367400c3f0e8527e
SHA512

cae7ef83d8eb0f77d018dae6327b46cbb61e68623d64551492f883b9903a00ff410a9bda7c84f4348497e55b34490b315f855b95288e71710076cb246863a6a4
SSDEEP

3072:IucJTUUk2QGjf93SybKeYOQpiGU0tFsHEx:IucjNrr9CybEOq5

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/0x0008000000018710-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2880	executorroblox.exe

Loads dropped DLL 1 IoCs

pid	Process
2028	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	flemme.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	executorroblox.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2824	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
2808	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2888	flemme.exe
2888	flemme.exe
2888	flemme.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2888	flemme.exe
Token: SeDebugPrivilege	2880	executorroblox.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2888 wrote to memory of 2424	2888	flemme.exe	30
PID 2888 wrote to memory of 2424	2888	flemme.exe	30
PID 2888 wrote to memory of 2424	2888	flemme.exe	30
PID 2888 wrote to memory of 2424	2888	flemme.exe	30
PID 2888 wrote to memory of 2028	2888	flemme.exe	32
PID 2888 wrote to memory of 2028	2888	flemme.exe	32
PID 2888 wrote to memory of 2028	2888	flemme.exe	32
PID 2888 wrote to memory of 2028	2888	flemme.exe	32
PID 2424 wrote to memory of 2808	2424	cmd.exe	34
PID 2424 wrote to memory of 2808	2424	cmd.exe	34
PID 2424 wrote to memory of 2808	2424	cmd.exe	34
PID 2424 wrote to memory of 2808	2424	cmd.exe	34
PID 2028 wrote to memory of 2824	2028	cmd.exe	35
PID 2028 wrote to memory of 2824	2028	cmd.exe	35
PID 2028 wrote to memory of 2824	2028	cmd.exe	35
PID 2028 wrote to memory of 2824	2028	cmd.exe	35
PID 2028 wrote to memory of 2880	2028	cmd.exe	36
PID 2028 wrote to memory of 2880	2028	cmd.exe	36
PID 2028 wrote to memory of 2880	2028	cmd.exe	36
PID 2028 wrote to memory of 2880	2028	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:2888
- 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:2424
- - 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:2808
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpC330.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2028
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2824
- - 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:2880

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\tmpC330.tmp.bat

Filesize
158B

MD5
551ad3a685dfcb9dc733adb098f3f9cf

SHA1
4e158979bdae6a4946e21abb20bece23aee0a811

SHA256
b3823658234d99c6af1220ac554533c6f2075b79c91996e5459e90941f53b19b

SHA512
6b973cbf3b5cbe8767e3244ae1c48012803e526681c5063fb9b5be60b43d0202b6d1a21bdf39b8dae62aa0e397b3cd941bdbb4b0afa4abbd7aa01b9e0661f666

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

Filesize
112KB

MD5
2dd4a3e79a430fcf80e0c16c059c4c2c

SHA1
b32b851bb2746acfa2035d6765f7827e5880debb

SHA256
5969e616a32e7cb09dd32ddca0c37e989a6131edb5c4a7b4367400c3f0e8527e

SHA512
cae7ef83d8eb0f77d018dae6327b46cbb61e68623d64551492f883b9903a00ff410a9bda7c84f4348497e55b34490b315f855b95288e71710076cb246863a6a4

Download Submit
memory/2880-16-0x0000000001090000-0x00000000010B2000-memory.dmp

Filesize
136KB

Download
memory/2888-0-0x0000000074E8E000-0x0000000074E8F000-memory.dmp

Filesize
4KB

Download
memory/2888-1-0x0000000000AD0000-0x0000000000AF2000-memory.dmp

Filesize
136KB

Download
memory/2888-2-0x0000000074E80000-0x000000007556E000-memory.dmp

Filesize
6.9MB

Download
memory/2888-12-0x0000000074E80000-0x000000007556E000-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