asyncrat | d94acc2a29273419227c070be66a652e5d074de175d0ec572bf9dee2f833703f

General

Target

temp.exe
Size

48KB
MD5

dfeaafa71cc4f33a546b050aefb83519
SHA1

3b34503a035774a83927fb5fc99a060c84e9b9e9
SHA256

d94acc2a29273419227c070be66a652e5d074de175d0ec572bf9dee2f833703f
SHA512

70c9ea4f9ee001648d85e11c6b6bc316b83c29866b97cb60fe2dc8f0994a721dcc77d9930020e5bbd19cab53a58cdf13c9af8d2f46d8e492d5e8e28d4c6763d4
SSDEEP

768:zukaVT3ongoWU2Gjimo2qrInm5FtxsWPIsm3TcSU0bFrBM/WTepY8hUudDHBkSJx:zukaVT3Q+27OHxsfsm3tbBrTIh7HeS5V

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

14.243.221.170:3322

Mutex

ynBzTukwLg8N

Attributes

delay
3
install
true
install_file
roIrMC.exe
install_folder
%Temp%

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
behavioral1/files/0x0008000000016c1a-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2764	roIrMC.exe

Loads dropped DLL 1 IoCs

pid	Process
2712	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	temp.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	roIrMC.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2724	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
2036	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2236	temp.exe
2236	temp.exe
2236	temp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2236	temp.exe
Token: SeDebugPrivilege	2764	roIrMC.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2236 wrote to memory of 2000	2236	temp.exe	31
PID 2236 wrote to memory of 2000	2236	temp.exe	31
PID 2236 wrote to memory of 2000	2236	temp.exe	31
PID 2236 wrote to memory of 2000	2236	temp.exe	31
PID 2236 wrote to memory of 2712	2236	temp.exe	33
PID 2236 wrote to memory of 2712	2236	temp.exe	33
PID 2236 wrote to memory of 2712	2236	temp.exe	33
PID 2236 wrote to memory of 2712	2236	temp.exe	33
PID 2000 wrote to memory of 2036	2000	cmd.exe	35
PID 2000 wrote to memory of 2036	2000	cmd.exe	35
PID 2000 wrote to memory of 2036	2000	cmd.exe	35
PID 2000 wrote to memory of 2036	2000	cmd.exe	35
PID 2712 wrote to memory of 2724	2712	cmd.exe	36
PID 2712 wrote to memory of 2724	2712	cmd.exe	36
PID 2712 wrote to memory of 2724	2712	cmd.exe	36
PID 2712 wrote to memory of 2724	2712	cmd.exe	36
PID 2712 wrote to memory of 2764	2712	cmd.exe	37
PID 2712 wrote to memory of 2764	2712	cmd.exe	37
PID 2712 wrote to memory of 2764	2712	cmd.exe	37
PID 2712 wrote to memory of 2764	2712	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\temp.exe
"C:\Users\Admin\AppData\Local\Temp\temp.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2236
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "roIrMC" /tr '"C:\Users\Admin\AppData\Local\Temp\roIrMC.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2000
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "roIrMC" /tr '"C:\Users\Admin\AppData\Local\Temp\roIrMC.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2036
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpF97C.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2712
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2724
- - C:\Users\Admin\AppData\Local\Temp\roIrMC.exe
    "C:\Users\Admin\AppData\Local\Temp\roIrMC.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2764

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\tmpF97C.tmp.bat

Filesize
153B

MD5
6b48f118b930089f46e85392530f664a

SHA1
439bd9591fa8b468774dd7bf111789f748d2b972

SHA256
0d5dbb5d44204da0e0b67c29c1b5668c07f2b19cbf64023569abe83e3737d021

SHA512
0d916ed169dcfb811b03873e0c2b0aa92238e19771e4ec2e07224fa7ae63e83ac42da79458b3655c2869aeef59ecceeec1556a84599b84d6e23f1aef77c7c33e

Download Submit
\Users\Admin\AppData\Local\Temp\roIrMC.exe

Filesize
48KB

MD5
dfeaafa71cc4f33a546b050aefb83519

SHA1
3b34503a035774a83927fb5fc99a060c84e9b9e9

SHA256
d94acc2a29273419227c070be66a652e5d074de175d0ec572bf9dee2f833703f

SHA512
70c9ea4f9ee001648d85e11c6b6bc316b83c29866b97cb60fe2dc8f0994a721dcc77d9930020e5bbd19cab53a58cdf13c9af8d2f46d8e492d5e8e28d4c6763d4

Download Submit
memory/2236-0-0x000000007408E000-0x000000007408F000-memory.dmp

Filesize
4KB

Download
memory/2236-1-0x0000000000050000-0x0000000000062000-memory.dmp

Filesize
72KB

Download
memory/2236-2-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2236-12-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2764-16-0x0000000000A60000-0x0000000000A72000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads