asyncrat | aea3e89e45a33441bcd06c990282f8601eb960a641c611222dce2fe09685e603

Analysis

max time kernel
150s
max time network
147s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
21-11-2024 23:13

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General

Target

Loader.exe
Size

63KB
MD5

7ceb11ebb7a55e33a82bc3b66f554e79
SHA1

8dfd574ad06ded662d92d81b72f14c1914ac45b5
SHA256

aea3e89e45a33441bcd06c990282f8601eb960a641c611222dce2fe09685e603
SHA512

d8cd7af50996015163c8926fc7b6df6a6e2c0b3f6c8fcff37cad5b72fed115f7134723d99f61a20576b83e67107a3a410f5ef2312191446b3d0759cb739e6ccd
SSDEEP

768:rig6BqomfHz4c78F3C8A+XuLvRIOdJD7P7DEhfW1+T4iSBGHmDbDOphLoXaHnCtB:i+4/WD7jhBYUbghiynCCundpqKmY7

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

technical-southwest.gl.at.ply.gg:58694

Attributes

delay
1
install
true
install_file
WINDOWS.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/0x0028000000045095-11.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-1-5-21-3785588363-1079601362-4184885025-1000\Control Panel\International\Geo\Nation	Loader.exe

Executes dropped EXE 1 IoCs

pid	Process
1020	WINDOWS.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
3140	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
2068	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
672	Loader.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe
1020	WINDOWS.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	672	Loader.exe
Token: SeDebugPrivilege	672	Loader.exe
Token: SeDebugPrivilege	1020	WINDOWS.exe
Token: SeDebugPrivilege	1020	WINDOWS.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 672 wrote to memory of 4332	672	Loader.exe	85
PID 672 wrote to memory of 4332	672	Loader.exe	85
PID 672 wrote to memory of 2188	672	Loader.exe	87
PID 672 wrote to memory of 2188	672	Loader.exe	87
PID 2188 wrote to memory of 3140	2188	cmd.exe	89
PID 2188 wrote to memory of 3140	2188	cmd.exe	89
PID 4332 wrote to memory of 2068	4332	cmd.exe	90
PID 4332 wrote to memory of 2068	4332	cmd.exe	90
PID 2188 wrote to memory of 1020	2188	cmd.exe	94
PID 2188 wrote to memory of 1020	2188	cmd.exe	94

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\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\Loader.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:672
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WINDOWS" /tr '"C:\Users\Admin\AppData\Roaming\WINDOWS.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4332
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "WINDOWS" /tr '"C:\Users\Admin\AppData\Roaming\WINDOWS.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2068
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9C8E.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2188
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3140
- - C:\Users\Admin\AppData\Roaming\WINDOWS.exe
    "C:\Users\Admin\AppData\Roaming\WINDOWS.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1020

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp9C8E.tmp.bat

Filesize
151B

MD5
1ccb966d20c61c99f9bea61cc27fde96

SHA1
993fafb95ff371a5cd25442a7de938534efb631d

SHA256
20a558ec4fc191e568c27b2c9e7f4956110697e7f79792f57f3f60ab5b7fa043

SHA512
2533959248217b8b191acac6db5ca0177bad5b90ce84ed35de27c0ee43a70754137fe0f6c8b6bde6caa3e25a3f8dbf6ebe3e6356dc6771d7c3f105a56f7ad674

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

Filesize
63KB

MD5
7ceb11ebb7a55e33a82bc3b66f554e79

SHA1
8dfd574ad06ded662d92d81b72f14c1914ac45b5

SHA256
aea3e89e45a33441bcd06c990282f8601eb960a641c611222dce2fe09685e603

SHA512
d8cd7af50996015163c8926fc7b6df6a6e2c0b3f6c8fcff37cad5b72fed115f7134723d99f61a20576b83e67107a3a410f5ef2312191446b3d0759cb739e6ccd

Download Submit
memory/672-0-0x0000000000E60000-0x0000000000E76000-memory.dmp

Filesize
88KB

Download
memory/672-1-0x00007FFE0EEC0000-0x00007FFE0F1B6000-memory.dmp

Filesize
3.0MB

Download
memory/672-2-0x00007FFE0EEC0000-0x00007FFE0F1B6000-memory.dmp

Filesize
3.0MB

Download
memory/672-3-0x00007FFE0EEC0000-0x00007FFE0F1B6000-memory.dmp

Filesize
3.0MB

Download
memory/672-8-0x00007FFE0EEC0000-0x00007FFE0F1B6000-memory.dmp

Filesize
3.0MB

Download