asyncrat | a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06

General

Target

a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06.exe
Size

51KB
MD5

7bc2e6b25bfafe16708196e844dc1476
SHA1

4689ebd58df0eaa8f21191f1e0aae0259a2a7497
SHA256

a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06
SHA512

aef4619973c3d71ce6eda4f4c1d4be2dcd88fceaf48bf2b4efde7c762d3ac45a3d4900b33aea04dfbd40079a279efd7ea2505056f0828cdb364ee478627e9e6a
SSDEEP

1536:Wuir1TUKP2nwcvaOgnQtobdZ/CyiUdF2:WuiJTUKP2rS3n5bd/j2

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

8TdjLZxCzOjI

Attributes

delay
3
install
true
install_file
client.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

resource	yara_rule
behavioral1/files/0x0004000000004ed7-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2228	client.exe

Loads dropped DLL 1 IoCs

pid	Process
2652	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	a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06.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	client.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2788	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
2768	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1940	a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06.exe
1940	a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06.exe
1940	a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1940	a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06.exe
Token: SeDebugPrivilege	2228	client.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1940 wrote to memory of 2840	1940	a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06.exe	31
PID 1940 wrote to memory of 2840	1940	a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06.exe	31
PID 1940 wrote to memory of 2840	1940	a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06.exe	31
PID 1940 wrote to memory of 2840	1940	a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06.exe	31
PID 1940 wrote to memory of 2652	1940	a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06.exe	33
PID 1940 wrote to memory of 2652	1940	a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06.exe	33
PID 1940 wrote to memory of 2652	1940	a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06.exe	33
PID 1940 wrote to memory of 2652	1940	a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06.exe	33
PID 2652 wrote to memory of 2788	2652	cmd.exe	36
PID 2652 wrote to memory of 2788	2652	cmd.exe	36
PID 2652 wrote to memory of 2788	2652	cmd.exe	36
PID 2652 wrote to memory of 2788	2652	cmd.exe	36
PID 2840 wrote to memory of 2768	2840	cmd.exe	35
PID 2840 wrote to memory of 2768	2840	cmd.exe	35
PID 2840 wrote to memory of 2768	2840	cmd.exe	35
PID 2840 wrote to memory of 2768	2840	cmd.exe	35
PID 2652 wrote to memory of 2228	2652	cmd.exe	37
PID 2652 wrote to memory of 2228	2652	cmd.exe	37
PID 2652 wrote to memory of 2228	2652	cmd.exe	37
PID 2652 wrote to memory of 2228	2652	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06.exe
"C:\Users\Admin\AppData\Local\Temp\a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1940
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "client" /tr '"C:\Users\Admin\AppData\Roaming\client.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2840
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "client" /tr '"C:\Users\Admin\AppData\Roaming\client.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2768
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpF289.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2652
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2788
- - C:\Users\Admin\AppData\Roaming\client.exe
    "C:\Users\Admin\AppData\Roaming\client.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2228

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\tmpF289.tmp.bat

Filesize
150B

MD5
cd8eab0d02823eed651fd2ff46e1308c

SHA1
cf8a4134e0acecd574ffc66dbe35a8853c447bbd

SHA256
2cb62af13b770fa2a855fdab436e16371381306995482ad41bb1378a1257e7b6

SHA512
258d9177af0bdeb7387e9ecd71588aeb4950fc8ca93dce5ee8fecd09f92589a3e6da2c00d3c5f3471942f9e6272163f205342dde98e7ebc0bf9987f98b53238f

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

Filesize
51KB

MD5
7bc2e6b25bfafe16708196e844dc1476

SHA1
4689ebd58df0eaa8f21191f1e0aae0259a2a7497

SHA256
a72a243ca862f09c197a135b15cc3081b7635cb1c78bb7f92daa932b78754b06

SHA512
aef4619973c3d71ce6eda4f4c1d4be2dcd88fceaf48bf2b4efde7c762d3ac45a3d4900b33aea04dfbd40079a279efd7ea2505056f0828cdb364ee478627e9e6a

Download Submit
memory/1940-0-0x000000007443E000-0x000000007443F000-memory.dmp

Filesize
4KB

Download
memory/1940-1-0x0000000000340000-0x0000000000352000-memory.dmp

Filesize
72KB

Download
memory/1940-2-0x0000000074430000-0x0000000074B1E000-memory.dmp

Filesize
6.9MB

Download
memory/1940-11-0x0000000074430000-0x0000000074B1E000-memory.dmp

Filesize
6.9MB

Download
memory/2228-16-0x00000000010F0000-0x0000000001102000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads