asyncrat | b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44

General

Target

b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
Size

48KB
MD5

b88243d04fee9d12f5f0cc6be853feee
SHA1

9f631d44a4859cc4b04497c4de839d8fc5d058eb
SHA256

b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44
SHA512

d755b92c3b95aef8faa9cd36408f9c02d57332ad48f7ac8de1aa34f807a62c93c82ce48f98442feb5c4e8002dff7701485db3ad030b8be261eeadb18cf158dc9
SSDEEP

768:Ouir1TUEFSuWUoV3kmo2qzcVrqQcQPaqLnaPI5HoIur0bcSvt/fNSp7klTWi8xK+:Ouir1TUKP23yKj5HozgbcSvxsp7klTWv

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

3.25.125.234:4782

Mutex

n9S3XYaGvXp6

Attributes

delay
3
install
true
install_file
System.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
behavioral2/files/0x001a00000002b1d9-12.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
3040	System.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	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.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	System.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1364	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
6080	schtasks.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
Token: SeDebugPrivilege	3040	System.exe
Token: SeDebugPrivilege	3040	System.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4044 wrote to memory of 2092	4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe	79
PID 4044 wrote to memory of 2092	4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe	79
PID 4044 wrote to memory of 2092	4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe	79
PID 4044 wrote to memory of 4716	4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe	81
PID 4044 wrote to memory of 4716	4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe	81
PID 4044 wrote to memory of 4716	4044	b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe	81
PID 4716 wrote to memory of 1364	4716	cmd.exe	83
PID 4716 wrote to memory of 1364	4716	cmd.exe	83
PID 4716 wrote to memory of 1364	4716	cmd.exe	83
PID 2092 wrote to memory of 6080	2092	cmd.exe	84
PID 2092 wrote to memory of 6080	2092	cmd.exe	84
PID 2092 wrote to memory of 6080	2092	cmd.exe	84
PID 4716 wrote to memory of 3040	4716	cmd.exe	85
PID 4716 wrote to memory of 3040	4716	cmd.exe	85
PID 4716 wrote to memory of 3040	4716	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe
"C:\Users\Admin\AppData\Local\Temp\b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4044
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "System" /tr '"C:\Users\Admin\AppData\Roaming\System.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2092
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "System" /tr '"C:\Users\Admin\AppData\Roaming\System.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:6080
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpEC63.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4716
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1364
- - C:\Users\Admin\AppData\Roaming\System.exe
    "C:\Users\Admin\AppData\Roaming\System.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:3040

Network

MITRE ATT&CK Enterprise v16

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\tmpEC63.tmp.bat

Filesize
150B

MD5
192ccd6273ae89399069d5f0a209a791

SHA1
89916bb942de54e6222cf2a1561a064e91c2bb98

SHA256
80930bc5e0e2d49ba6e64c9a03c0ec47ba3efd3211d00376b2e9d476532d6a9d

SHA512
432256d364b634861a36040e7a4983fa7e9282bca91eccfedacf65fc76a1cdcbb0c497f28ff03eb63d79da2ba4eb66bcc8f324ea6bc47d53f595107e00e08b81

Download Submit
C:\Users\Admin\AppData\Roaming\System.exe

Filesize
48KB

MD5
b88243d04fee9d12f5f0cc6be853feee

SHA1
9f631d44a4859cc4b04497c4de839d8fc5d058eb

SHA256
b01aec687a8d5626d17066b1a38c6b54516ee163e2b24b18fbb005bb92452e44

SHA512
d755b92c3b95aef8faa9cd36408f9c02d57332ad48f7ac8de1aa34f807a62c93c82ce48f98442feb5c4e8002dff7701485db3ad030b8be261eeadb18cf158dc9

Download Submit
memory/3040-14-0x0000000074960000-0x0000000075111000-memory.dmp

Filesize
7.7MB

Download
memory/3040-17-0x0000000006AE0000-0x0000000007086000-memory.dmp

Filesize
5.6MB

Download
memory/3040-18-0x0000000074960000-0x0000000075111000-memory.dmp

Filesize
7.7MB

Download
memory/4044-0-0x0000000074A0E000-0x0000000074A0F000-memory.dmp

Filesize
4KB

Download
memory/4044-1-0x0000000000770000-0x0000000000782000-memory.dmp

Filesize
72KB

Download
memory/4044-2-0x0000000074A00000-0x00000000751B1000-memory.dmp

Filesize
7.7MB

Download
memory/4044-3-0x0000000005210000-0x0000000005276000-memory.dmp

Filesize
408KB

Download
memory/4044-4-0x0000000005660000-0x00000000056FC000-memory.dmp

Filesize
624KB

Download
memory/4044-10-0x0000000074A00000-0x00000000751B1000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads