asyncrat | 69f92526cfccfbd89638d8659be33461076f6fb97cf4c8112146384d95b9d6cc

Analysis

max time kernel
150s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
14-11-2024 19:43

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General

Target

Infected.exe
Size

63KB
MD5

585eefe97073fb646d9e3164a5c7749b
SHA1

185d4ba47e76c2c96860512adfab40a1abd2ff84
SHA256

69f92526cfccfbd89638d8659be33461076f6fb97cf4c8112146384d95b9d6cc
SHA512

f9551fc6c286d8f497f8b26f3a50d6fff6ece3d159f6bf674c9fda204b2be62e316baf4218ae7032c25504bf821bf1a8a51ab935cea1e02910694a90f519e77f
SSDEEP

768:Ek/9PXn1w787gC8A+XvqazcBRL5JTk1+T4KSBGHmDbD/ph0oXRWVUwsSutkpqKYC:RR1gMdSJYUbdh9KlrutkpqKmY7

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

127.0.0.1:123

127.0.0.1:80

1.2.3.4:123

1.2.3.4:80

Attributes

delay
1
install
true
install_file
loader.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

Processes:

resource	yara_rule
behavioral2/files/0x000d000000023b7a-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

Processes:

Infected.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	Infected.exe

Executes dropped EXE 1 IoCs

Processes:

loader.exe

pid	Process
1296	loader.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

Processes:

timeout.exe

pid	Process
2316	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

Processes:

schtasks.exe

pid	Process
1516	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

Infected.exeloader.exe

pid	Process
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
2776	Infected.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe
1296	loader.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Infected.exeloader.exe

description	pid	Process
Token: SeDebugPrivilege	2776	Infected.exe
Token: SeDebugPrivilege	2776	Infected.exe
Token: SeDebugPrivilege	1296	loader.exe
Token: SeDebugPrivilege	1296	loader.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

Infected.execmd.execmd.exe

description	pid	Process	procid_target
PID 2776 wrote to memory of 1856	2776	Infected.exe	89
PID 2776 wrote to memory of 1856	2776	Infected.exe	89
PID 2776 wrote to memory of 4448	2776	Infected.exe	91
PID 2776 wrote to memory of 4448	2776	Infected.exe	91
PID 1856 wrote to memory of 1516	1856	cmd.exe	93
PID 1856 wrote to memory of 1516	1856	cmd.exe	93
PID 4448 wrote to memory of 2316	4448	cmd.exe	94
PID 4448 wrote to memory of 2316	4448	cmd.exe	94
PID 4448 wrote to memory of 1296	4448	cmd.exe	100
PID 4448 wrote to memory of 1296	4448	cmd.exe	100

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\Infected.exe
"C:\Users\Admin\AppData\Local\Temp\Infected.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2776
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "loader" /tr '"C:\Users\Admin\AppData\Roaming\loader.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1856
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "loader" /tr '"C:\Users\Admin\AppData\Roaming\loader.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1516
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCEC9.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4448
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2316
- - C:\Users\Admin\AppData\Roaming\loader.exe
    "C:\Users\Admin\AppData\Roaming\loader.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1296

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\tmpCEC9.tmp.bat

Filesize
150B

MD5
00c0dc218eea6884fb8921b28c4626e6

SHA1
ab2d4f095744a18010eb95f2810ac9eba23c1210

SHA256
3adbd2993e134e61b9f894f74438f6c8f93f597df52030f57b2b5ac4c749cae2

SHA512
e64b111998f1138687f5b673c67f635f1e1fdd58e85589ce188992f5f4495abda7f614f1026b88cdb26d7aab3d3cb85d1fcd5b401c21c2e98325dbde28c8a8b9

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

Filesize
63KB

MD5
585eefe97073fb646d9e3164a5c7749b

SHA1
185d4ba47e76c2c96860512adfab40a1abd2ff84

SHA256
69f92526cfccfbd89638d8659be33461076f6fb97cf4c8112146384d95b9d6cc

SHA512
f9551fc6c286d8f497f8b26f3a50d6fff6ece3d159f6bf674c9fda204b2be62e316baf4218ae7032c25504bf821bf1a8a51ab935cea1e02910694a90f519e77f

Download Submit
memory/2776-0-0x00007FFBFAB63000-0x00007FFBFAB65000-memory.dmp

Filesize
8KB

Download
memory/2776-1-0x0000000000600000-0x0000000000616000-memory.dmp

Filesize
88KB

Download
memory/2776-2-0x00007FFBFAB60000-0x00007FFBFB621000-memory.dmp

Filesize
10.8MB

Download
memory/2776-7-0x00007FFBFAB60000-0x00007FFBFB621000-memory.dmp

Filesize
10.8MB

Download
memory/2776-8-0x00007FFBFAB60000-0x00007FFBFB621000-memory.dmp

Filesize
10.8MB

Download