asyncrat | 00577d6d7e7d1a3417d89d07668136959978c0bb4ec4f35b8e32f683e65d8ea6

General

Target

Caser.exe
Size

45KB
MD5

853e7871e4a6f398fe39c88b39a064e9
SHA1

81cfc85c75c314e1d7be9e0aef35562ac1a86d9a
SHA256

00577d6d7e7d1a3417d89d07668136959978c0bb4ec4f35b8e32f683e65d8ea6
SHA512

b37158344ad8b5b34cf132c770e95840a00ea6e06001042416cc2030485e9d848a09a37323e3dc82f07c20029ede6ba83be05c0d7f61ff4684d64ecf4cbf70ae
SSDEEP

768:luI1tT/w70kWUquzumo2qzEKjPGaG6PIyzjbFgX3iFUGIAAj9gtsaVzBDZWx:luI1tT/kW2tKTkDy3bCXSFlIr9giedWx

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:2424

Mutex

dPEIFfZH3RI0

Attributes

delay
3
install
true
install_file
virus.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/0x0008000000018710-14.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2616	virus.exe

Loads dropped DLL 1 IoCs

pid	Process
2408	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	virus.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Caser.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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2804	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
2204	Caser.exe
2204	Caser.exe
2204	Caser.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2204	Caser.exe
Token: SeDebugPrivilege	2616	virus.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2204 wrote to memory of 2100	2204	Caser.exe	31
PID 2204 wrote to memory of 2100	2204	Caser.exe	31
PID 2204 wrote to memory of 2100	2204	Caser.exe	31
PID 2204 wrote to memory of 2100	2204	Caser.exe	31
PID 2204 wrote to memory of 2408	2204	Caser.exe	33
PID 2204 wrote to memory of 2408	2204	Caser.exe	33
PID 2204 wrote to memory of 2408	2204	Caser.exe	33
PID 2204 wrote to memory of 2408	2204	Caser.exe	33
PID 2100 wrote to memory of 2808	2100	cmd.exe	36
PID 2100 wrote to memory of 2808	2100	cmd.exe	36
PID 2100 wrote to memory of 2808	2100	cmd.exe	36
PID 2100 wrote to memory of 2808	2100	cmd.exe	36
PID 2408 wrote to memory of 2804	2408	cmd.exe	35
PID 2408 wrote to memory of 2804	2408	cmd.exe	35
PID 2408 wrote to memory of 2804	2408	cmd.exe	35
PID 2408 wrote to memory of 2804	2408	cmd.exe	35
PID 2408 wrote to memory of 2616	2408	cmd.exe	37
PID 2408 wrote to memory of 2616	2408	cmd.exe	37
PID 2408 wrote to memory of 2616	2408	cmd.exe	37
PID 2408 wrote to memory of 2616	2408	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\Caser.exe
"C:\Users\Admin\AppData\Local\Temp\Caser.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "virus" /tr '"C:\Users\Admin\AppData\Roaming\virus.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2100
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "virus" /tr '"C:\Users\Admin\AppData\Roaming\virus.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\tmpF4DA.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2408
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2804
- - C:\Users\Admin\AppData\Roaming\virus.exe
    "C:\Users\Admin\AppData\Roaming\virus.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2616

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\tmpF4DA.tmp.bat

Filesize
149B

MD5
2713d98a82a223d26ab2ceebca726ef7

SHA1
810179b641b022bd26b1e0a4052eda4a4a021665

SHA256
5300e46aaeeb98e623027980125d64c197f798735756a1f5197be9381aeda4c5

SHA512
9c176ffd7d72c79b889fe4672cc3ab4d44aedde6974d9f13984712aa85212ea007fbe62b173577f592dcbd29aaa09b3ba5e0ec3e89f38601dad1fb552c12d183

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

Filesize
45KB

MD5
853e7871e4a6f398fe39c88b39a064e9

SHA1
81cfc85c75c314e1d7be9e0aef35562ac1a86d9a

SHA256
00577d6d7e7d1a3417d89d07668136959978c0bb4ec4f35b8e32f683e65d8ea6

SHA512
b37158344ad8b5b34cf132c770e95840a00ea6e06001042416cc2030485e9d848a09a37323e3dc82f07c20029ede6ba83be05c0d7f61ff4684d64ecf4cbf70ae

Download Submit
memory/2204-0-0x0000000074B2E000-0x0000000074B2F000-memory.dmp

Filesize
4KB

Download
memory/2204-1-0x0000000000100000-0x0000000000112000-memory.dmp

Filesize
72KB

Download
memory/2204-2-0x0000000074B20000-0x000000007520E000-memory.dmp

Filesize
6.9MB

Download
memory/2204-11-0x0000000074B20000-0x000000007520E000-memory.dmp

Filesize
6.9MB

Download
memory/2616-16-0x0000000000F30000-0x0000000000F42000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads