asyncrat | 5d9462df1358300a31465de672b4b381c93951694a57173888ecfac925bd1b0d

General

Target

client.exe
Size

48KB
MD5

e6292b21c62a19c81dd8c02d325356a8
SHA1

92c788bb00afccda8c3abb5de86220a3293d8c2b
SHA256

5d9462df1358300a31465de672b4b381c93951694a57173888ecfac925bd1b0d
SHA512

909129b99c7d391ba59b65befb659809651ec989838ad1e9189fdfcef189a6ac7f7dc9db92d4dc7339b71f71145f504b5976362177a23f873d43b7dcdcf5b13a
SSDEEP

768:euUjVTwkbBHWU72ZcFmo2qj3tjTkVxyPImNjbH0bKUPGWGVsgA5Rs9CEcq3BDZnj:euUjVTwA4M2ilkVxbejAbKUPcVsgERsN

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

Mutex

FmolrtiF4eeI

Attributes

delay
3
install
true
install_file
ratatoulie.exe
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/hcwJVFkr

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/0x000d00000001202b-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2916	ratatoulie.exe

Loads dropped DLL 1 IoCs

pid	Process
3052	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
4	pastebin.com
5	pastebin.com

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	client.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ratatoulie.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1932	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
2200	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2600	client.exe
2600	client.exe
2600	client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2600	client.exe
Token: SeDebugPrivilege	2916	ratatoulie.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2600 wrote to memory of 2004	2600	client.exe	30
PID 2600 wrote to memory of 2004	2600	client.exe	30
PID 2600 wrote to memory of 2004	2600	client.exe	30
PID 2600 wrote to memory of 2004	2600	client.exe	30
PID 2600 wrote to memory of 3052	2600	client.exe	32
PID 2600 wrote to memory of 3052	2600	client.exe	32
PID 2600 wrote to memory of 3052	2600	client.exe	32
PID 2600 wrote to memory of 3052	2600	client.exe	32
PID 2004 wrote to memory of 2200	2004	cmd.exe	34
PID 2004 wrote to memory of 2200	2004	cmd.exe	34
PID 2004 wrote to memory of 2200	2004	cmd.exe	34
PID 2004 wrote to memory of 2200	2004	cmd.exe	34
PID 3052 wrote to memory of 1932	3052	cmd.exe	35
PID 3052 wrote to memory of 1932	3052	cmd.exe	35
PID 3052 wrote to memory of 1932	3052	cmd.exe	35
PID 3052 wrote to memory of 1932	3052	cmd.exe	35
PID 3052 wrote to memory of 2916	3052	cmd.exe	36
PID 3052 wrote to memory of 2916	3052	cmd.exe	36
PID 3052 wrote to memory of 2916	3052	cmd.exe	36
PID 3052 wrote to memory of 2916	3052	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\client.exe
"C:\Users\Admin\AppData\Local\Temp\client.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2600
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ratatoulie" /tr '"C:\Users\Admin\AppData\Roaming\ratatoulie.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2004
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "ratatoulie" /tr '"C:\Users\Admin\AppData\Roaming\ratatoulie.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2200
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpA229.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3052
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1932
- - C:\Users\Admin\AppData\Roaming\ratatoulie.exe
    "C:\Users\Admin\AppData\Roaming\ratatoulie.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2916

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpA229.tmp.bat

Filesize
154B

MD5
273fc978fd9848c64266dc7b1fca505a

SHA1
48b6a4d39618378d6efc24e11ecdcf2aaf925036

SHA256
80a579a72ee12b8de88781f5492febd92d5c5339d5bc5074f0921aae61690622

SHA512
3b8fb1c16acbc6f8f2d0c257c31a10b1e37e71b4aae20af6fde7b55f69d48ff827f42c4c61fd2570c21fb95b48a7a5cbbd93149f27b16c3da31548a2cf1e8917

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

Filesize
48KB

MD5
e6292b21c62a19c81dd8c02d325356a8

SHA1
92c788bb00afccda8c3abb5de86220a3293d8c2b

SHA256
5d9462df1358300a31465de672b4b381c93951694a57173888ecfac925bd1b0d

SHA512
909129b99c7d391ba59b65befb659809651ec989838ad1e9189fdfcef189a6ac7f7dc9db92d4dc7339b71f71145f504b5976362177a23f873d43b7dcdcf5b13a

Download Submit
memory/2600-0-0x00000000741FE000-0x00000000741FF000-memory.dmp

Filesize
4KB

Download
memory/2600-1-0x0000000000BB0000-0x0000000000BC2000-memory.dmp

Filesize
72KB

Download
memory/2600-2-0x00000000741F0000-0x00000000748DE000-memory.dmp

Filesize
6.9MB

Download
memory/2600-11-0x00000000741F0000-0x00000000748DE000-memory.dmp

Filesize
6.9MB

Download
memory/2916-16-0x0000000000830000-0x0000000000842000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads