asyncrat | 2eb914fb9a98ac7253618469a7a84c2435412e14fba4807115ec41bb91212a3b

General

Target

Infected.exe
Size

63KB
MD5

aeb5089987b93971f679821bd94cab7d
SHA1

0573200e114d930c8f29dae945c63bfc4007f098
SHA256

2eb914fb9a98ac7253618469a7a84c2435412e14fba4807115ec41bb91212a3b
SHA512

58129d8d9c3f0d7438565ae022ff0e7750dba11e2acdc660261805ab0cbdf02fba2796790b8032b8e9d7c4b7e260f9064fb4c0483d69f7f95db0ab2a1e570a99
SSDEEP

768:N1vwJdXHF378LAC8A+XP6azcBRL5JTk1+T4KSBGHmDbD/ph0oXIaNGNUSuIdpqKX:TUFB8dSJYUbdh9HNGNTuIdpqKmY7

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

127.0.0.1:3232

ilovabby.ddns.net:3232

Attributes

delay
2
install
true
install_file
windowsupdater.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\windowsupdater.exe	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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	Infected.exe

Executes dropped EXE 1 IoCs

Processes:

windowsupdater.exe

pid process

3760 windowsupdater.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

3008 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2984 timeout.exe

pid	process
3760	windowsupdater.exe

pid	process
3008	schtasks.exe

pid	process
2984	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

Infected.exe

pid	process
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe
3240	Infected.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Infected.exewindowsupdater.exe

description pid process

Token: SeDebugPrivilege 3240 Infected.exe
Token: SeDebugPrivilege 3760 windowsupdater.exe

description	pid	process
Token: SeDebugPrivilege	3240	Infected.exe
Token: SeDebugPrivilege	3760	windowsupdater.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

Infected.execmd.execmd.exe

description	pid	process	target process
PID 3240 wrote to memory of 3748	3240	Infected.exe	cmd.exe
PID 3240 wrote to memory of 3748	3240	Infected.exe	cmd.exe
PID 3240 wrote to memory of 2876	3240	Infected.exe	cmd.exe
PID 3240 wrote to memory of 2876	3240	Infected.exe	cmd.exe
PID 3748 wrote to memory of 3008	3748	cmd.exe	schtasks.exe
PID 3748 wrote to memory of 3008	3748	cmd.exe	schtasks.exe
PID 2876 wrote to memory of 2984	2876	cmd.exe	timeout.exe
PID 2876 wrote to memory of 2984	2876	cmd.exe	timeout.exe
PID 2876 wrote to memory of 3760	2876	cmd.exe	windowsupdater.exe
PID 2876 wrote to memory of 3760	2876	cmd.exe	windowsupdater.exe

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:3240
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "windowsupdater" /tr '"C:\Users\Admin\AppData\Roaming\windowsupdater.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3748
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "windowsupdater" /tr '"C:\Users\Admin\AppData\Roaming\windowsupdater.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:3008
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5285.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2876
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2984
- - C:\Users\Admin\AppData\Roaming\windowsupdater.exe
    "C:\Users\Admin\AppData\Roaming\windowsupdater.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:3760

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp5285.tmp.bat

Filesize
158B

MD5
85c33f38ce4b21b9352fbacd59775682

SHA1
1eaef28e372aefa9b8e925a79234cc879eafe905

SHA256
f8843faff7f2bbe689f58a816280c9530da85c2e6d864840a91a6849d366e92c

SHA512
3672072ac0221c206b088c0619a45dcf25bc12200011d295e56c28f088854a5e6f269f2e60433649577efa5049cc4562b6ba7c3bf9cbce3813000cc1a4b66043

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

Filesize
63KB

MD5
aeb5089987b93971f679821bd94cab7d

SHA1
0573200e114d930c8f29dae945c63bfc4007f098

SHA256
2eb914fb9a98ac7253618469a7a84c2435412e14fba4807115ec41bb91212a3b

SHA512
58129d8d9c3f0d7438565ae022ff0e7750dba11e2acdc660261805ab0cbdf02fba2796790b8032b8e9d7c4b7e260f9064fb4c0483d69f7f95db0ab2a1e570a99

Download Submit
memory/3240-0-0x00000000009B0000-0x00000000009C6000-memory.dmp

Filesize
88KB

Download
memory/3240-1-0x00007FFA2B193000-0x00007FFA2B195000-memory.dmp

Filesize
8KB

Download
memory/3240-2-0x00007FFA2B190000-0x00007FFA2BC51000-memory.dmp

Filesize
10.8MB

Download
memory/3240-7-0x00007FFA2B190000-0x00007FFA2BC51000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads