asyncrat | 1ee1af228d0cfcf2beae5a2df53a291d24fb6213c5e453cfb09c155b20a7a965 | Triage

Resubmissions

13-01-2025 00:08

250113-afd6eswkgy 10

11-01-2025 17:29

250111-v2yr6svkbv 10

Analysis

max time kernel
895s
max time network
898s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
13-01-2025 00:08

Sharing

Report Analysis Logs

General

Target

Infected.exe
Size

63KB
MD5

abcbbfd4f4cdcef98962ad976802fb69
SHA1

ecce5776a92707e00b28441975e73a715f9e2185
SHA256

1ee1af228d0cfcf2beae5a2df53a291d24fb6213c5e453cfb09c155b20a7a965
SHA512

e38348d3f6983e02378dd4649630fd0a39ad6428bc82aa6f2738f1ec794b9b48db7457b3009f7f65e49fc5d994dcde6105fdf72bd572086d8017558aab541100
SSDEEP

768:RdGnVhwdjndk78TQC8A+XiuazcBRL5JTk1+T4KSBGHmDbD/ph0oXQxa/qSuAdpqM:mnSdsNdSJYUbdh9QxaFuAdpqKmY7

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

mbaper-28496.portmap.host:2420

mbaper-28496.portmap.host:28833

Attributes

delay
1
install
true
install_file
Google.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

resource	yara_rule
behavioral2/files/0x0008000000023c83-11.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	Infected.exe

Executes dropped EXE 1 IoCs

pid	Process
4660	Google.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

pid	Process
672	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

pid	Process
1520	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe
664	Infected.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	664	Infected.exe
Token: SeDebugPrivilege	4660	Google.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 664 wrote to memory of 2052	664	Infected.exe	83
PID 664 wrote to memory of 2052	664	Infected.exe	83
PID 664 wrote to memory of 3552	664	Infected.exe	85
PID 664 wrote to memory of 3552	664	Infected.exe	85
PID 2052 wrote to memory of 1520	2052	cmd.exe	87
PID 2052 wrote to memory of 1520	2052	cmd.exe	87
PID 3552 wrote to memory of 672	3552	cmd.exe	88
PID 3552 wrote to memory of 672	3552	cmd.exe	88
PID 3552 wrote to memory of 4660	3552	cmd.exe	90
PID 3552 wrote to memory of 4660	3552	cmd.exe	90

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 cmd /c %SIGILL% "SIGTERM|DELETE|SIGKILL"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:664
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Google" /tr '"C:\Users\Admin\AppData\Roaming\Google.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2052
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Google" /tr '"C:\Users\Admin\AppData\Roaming\Google.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1520
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB45C.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3552
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:672
- - C:\Users\Admin\AppData\Roaming\Google.exe
    "C:\Users\Admin\AppData\Roaming\Google.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4660

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Scheduled Task

Persistence

Scheduled Task/Job

Scheduled Task

Privilege Escalation

Scheduled Task/Job

Scheduled Task

Defense Evasion

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB45C.tmp.bat

Filesize
150B

MD5
a2f6b8f6e67e5fb7e50d552ce3f7cb84

SHA1
affca291a6aaa101ab362198c541adaa40d653ab

SHA256
93a12ba989824824cf53e5ec00322da3b0c12648dcefd8a43ee507c4dbc265c0

SHA512
9dcad7d0c07b06c70322739f6a3bce9746476fe24f757944bdcec3546e8ca62de94ea91d800545c2cb3e89c2363ed8c329f14cd4b93a10968049736659250170

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

Filesize
63KB

MD5
abcbbfd4f4cdcef98962ad976802fb69

SHA1
ecce5776a92707e00b28441975e73a715f9e2185

SHA256
1ee1af228d0cfcf2beae5a2df53a291d24fb6213c5e453cfb09c155b20a7a965

SHA512
e38348d3f6983e02378dd4649630fd0a39ad6428bc82aa6f2738f1ec794b9b48db7457b3009f7f65e49fc5d994dcde6105fdf72bd572086d8017558aab541100

Download Submit
memory/664-0-0x00007FFBAD563000-0x00007FFBAD565000-memory.dmp

Filesize
8KB

Download
memory/664-1-0x0000000000C20000-0x0000000000C36000-memory.dmp

Filesize
88KB

Download
memory/664-2-0x00007FFBAD560000-0x00007FFBAE021000-memory.dmp

Filesize
10.8MB

Download
memory/664-7-0x00007FFBAD560000-0x00007FFBAE021000-memory.dmp

Filesize
10.8MB

Download
memory/664-8-0x00007FFBAD560000-0x00007FFBAE021000-memory.dmp

Filesize
10.8MB

Download