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
behavioral2/files/0x000b000000023b84-11.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	temp.exe

Executes dropped EXE 1 IoCs

pid	Process
3116	roIrMC.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	roIrMC.exe
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	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1260	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
1100	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe
3356	temp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3356	temp.exe
Token: SeDebugPrivilege	3116	roIrMC.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3356 wrote to memory of 1456	3356	temp.exe	82
PID 3356 wrote to memory of 1456	3356	temp.exe	82
PID 3356 wrote to memory of 1456	3356	temp.exe	82
PID 3356 wrote to memory of 2380	3356	temp.exe	84
PID 3356 wrote to memory of 2380	3356	temp.exe	84
PID 3356 wrote to memory of 2380	3356	temp.exe	84
PID 1456 wrote to memory of 1100	1456	cmd.exe	86
PID 1456 wrote to memory of 1100	1456	cmd.exe	86
PID 1456 wrote to memory of 1100	1456	cmd.exe	86
PID 2380 wrote to memory of 1260	2380	cmd.exe	87
PID 2380 wrote to memory of 1260	2380	cmd.exe	87
PID 2380 wrote to memory of 1260	2380	cmd.exe	87
PID 2380 wrote to memory of 3116	2380	cmd.exe	88
PID 2380 wrote to memory of 3116	2380	cmd.exe	88
PID 2380 wrote to memory of 3116	2380	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\temp.exe
"C:\Users\Admin\AppData\Local\Temp\temp.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3356
- 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:1456
- - 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:1100
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9DD6.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2380
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1260
- - 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:3116

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

Query Registry

1

T1012

System Information Discovery

2

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\roIrMC.exe

Filesize
48KB

MD5
dfeaafa71cc4f33a546b050aefb83519

SHA1
3b34503a035774a83927fb5fc99a060c84e9b9e9

SHA256
d94acc2a29273419227c070be66a652e5d074de175d0ec572bf9dee2f833703f

SHA512
70c9ea4f9ee001648d85e11c6b6bc316b83c29866b97cb60fe2dc8f0994a721dcc77d9930020e5bbd19cab53a58cdf13c9af8d2f46d8e492d5e8e28d4c6763d4

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9DD6.tmp.bat

Filesize
153B

MD5
3a75e044b6eb8843c453b51c7acc7e3d

SHA1
133032b206f99e7ea3a74ff8edf269176d6cb463

SHA256
211ed393fbcbdb95fdd1f6632e311eeb582fa2be3c6cb21b445922dd718db517

SHA512
13485bfd990fa27cff3b8ab93e2b191aa7367265a8c1e9f3b2344121bbb516503d396ba4e645b564f31654a92004fc7347c5615df28a1f61f63244d09c1e6c21

Download Submit
memory/3116-13-0x0000000074A90000-0x0000000075240000-memory.dmp

Filesize
7.7MB

Download
memory/3116-14-0x0000000074A90000-0x0000000075240000-memory.dmp

Filesize
7.7MB

Download
memory/3356-0-0x0000000074A9E000-0x0000000074A9F000-memory.dmp

Filesize
4KB

Download
memory/3356-1-0x0000000000C70000-0x0000000000C82000-memory.dmp

Filesize
72KB

Download
memory/3356-2-0x0000000074A90000-0x0000000075240000-memory.dmp

Filesize
7.7MB

Download
memory/3356-3-0x0000000005640000-0x00000000056DC000-memory.dmp

Filesize
624KB

Download
memory/3356-8-0x0000000074A90000-0x0000000075240000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads