asyncrat | a1ab0b66e66d84c8687298d71c66e347ac8b22d8ba7b7aedec7867c54ed8a14e

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
31-12-2024 03:50

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Fixer (1).exe
Size

63KB
MD5

1b13586a90a4197f78ae7fbbb62cd2c3
SHA1

b6c29b130e1c3d442e7850de3c5303284685c610
SHA256

a1ab0b66e66d84c8687298d71c66e347ac8b22d8ba7b7aedec7867c54ed8a14e
SHA512

97002dfd7f4a4b14e489f952f2802b04a1bf2938fb3870bf89dd2998fa56e4531717d117bf872e8d1f601bd6edeac59a73ee262fa3923ba1db8b5ff1541eccb9
SSDEEP

768:RdGnVhwdjndk78TQC8A+XiuazcBRL5JTk1+T4KSBGHmDbD/ph0oXpC4AdvCSuAdP:mnSdsNdSJYUbdh9ps1uAdpqKmY7

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

associated-chevy.gl.at.ply.gg:46398

Attributes

delay
1
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/0x000b000000023b87-11.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	Fixer (1).exe

Executes dropped EXE 1 IoCs

pid	Process
1212	System.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3884	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
1684	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
2388	Fixer (1).exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe
1212	System.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2388	Fixer (1).exe
Token: SeDebugPrivilege	1212	System.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2388 wrote to memory of 5028	2388	Fixer (1).exe	83
PID 2388 wrote to memory of 5028	2388	Fixer (1).exe	83
PID 2388 wrote to memory of 2132	2388	Fixer (1).exe	85
PID 2388 wrote to memory of 2132	2388	Fixer (1).exe	85
PID 2132 wrote to memory of 3884	2132	cmd.exe	87
PID 2132 wrote to memory of 3884	2132	cmd.exe	87
PID 5028 wrote to memory of 1684	5028	cmd.exe	88
PID 5028 wrote to memory of 1684	5028	cmd.exe	88
PID 2132 wrote to memory of 1212	2132	cmd.exe	89
PID 2132 wrote to memory of 1212	2132	cmd.exe	89

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Fixer (1).exe
"C:\Users\Admin\AppData\Local\Temp\Fixer (1).exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2388
- C:\Windows\System32\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⤵
  - Suspicious use of WriteProcessMemory
  PID:5028
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "System" /tr '"C:\Users\Admin\AppData\Roaming\System.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1684
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9A4C.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2132
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3884
- - C:\Users\Admin\AppData\Roaming\System.exe
    "C:\Users\Admin\AppData\Roaming\System.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1212

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp9A4C.tmp.bat

Filesize
150B

MD5
b274035555fc48088f8725518a799f8a

SHA1
64489e0b42d8d42bd2a31d38a18686d9ef35b43e

SHA256
d9f8f68a6bb9df6ceb0740179f08d45cd13696038f97bf9296aa9301d8e031ae

SHA512
f8d256cdbb06874831287f49c6bbe8edd34e08a4e24879a4a114d72b495ec8d9b74dda77c655f540cdfa47c5f01572f6764641ff557063adcd1a9d7b2c6d5c72

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

Filesize
63KB

MD5
1b13586a90a4197f78ae7fbbb62cd2c3

SHA1
b6c29b130e1c3d442e7850de3c5303284685c610

SHA256
a1ab0b66e66d84c8687298d71c66e347ac8b22d8ba7b7aedec7867c54ed8a14e

SHA512
97002dfd7f4a4b14e489f952f2802b04a1bf2938fb3870bf89dd2998fa56e4531717d117bf872e8d1f601bd6edeac59a73ee262fa3923ba1db8b5ff1541eccb9

Download Submit
memory/2388-0-0x00007FF828243000-0x00007FF828245000-memory.dmp

Filesize
8KB

Download
memory/2388-1-0x0000000000AD0000-0x0000000000AE6000-memory.dmp

Filesize
88KB

Download
memory/2388-2-0x00007FF828240000-0x00007FF828D01000-memory.dmp

Filesize
10.8MB

Download
memory/2388-7-0x00007FF828240000-0x00007FF828D01000-memory.dmp

Filesize
10.8MB

Download
memory/2388-8-0x00007FF828240000-0x00007FF828D01000-memory.dmp

Filesize
10.8MB

Download