asyncrat | ac038502c851488f63a577e3b51c951892c8104934ca68e05bffe8b12a3099bc

General

Target

Infected.exe
Size

63KB
MD5

ed84599b85e02fc16b0763d9158e7691
SHA1

d508b2240df9c3b36ea315aab8370ab6d76724b2
SHA256

ac038502c851488f63a577e3b51c951892c8104934ca68e05bffe8b12a3099bc
SHA512

b55cdeaeda4070f6bdce9516d47bc5037177704d9fa4ea02866bd9804ef1d8f2dd035625709b4d52d8ac4db3497bb06f2c4e19f80de5eafd8321b09897e07515
SSDEEP

768:ZJ4BeNf5g78fIC8A+XayazcBRL5JTk1+T4KSBGHmDbD/ph0oX78vsRSukdpqKYhg:cq5UZdSJYUbdh9wEoukdpqKmY7

Score

10^/10

asyncrat breeze rat

Malware Config

Extracted

Family

asyncrat

Botnet

Breeze

C2

FederalServices-21439.portmap.host:21439

Attributes

delay
1
install
true
install_file
service.exe
install_folder
%Temp%

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/0x0007000000023caf-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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	Infected.exe

Executes dropped EXE 1 IoCs

pid	Process
3824	service.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
4892	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
1228	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe
1164	Infected.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1164	Infected.exe
Token: SeDebugPrivilege	3824	service.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1164 wrote to memory of 4824	1164	Infected.exe	84
PID 1164 wrote to memory of 4824	1164	Infected.exe	84
PID 1164 wrote to memory of 3516	1164	Infected.exe	86
PID 1164 wrote to memory of 3516	1164	Infected.exe	86
PID 4824 wrote to memory of 1228	4824	cmd.exe	88
PID 4824 wrote to memory of 1228	4824	cmd.exe	88
PID 3516 wrote to memory of 4892	3516	cmd.exe	89
PID 3516 wrote to memory of 4892	3516	cmd.exe	89
PID 3516 wrote to memory of 3824	3516	cmd.exe	98
PID 3516 wrote to memory of 3824	3516	cmd.exe	98

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:1164
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "service" /tr '"C:\Users\Admin\AppData\Local\Temp\service.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4824
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "service" /tr '"C:\Users\Admin\AppData\Local\Temp\service.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1228
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpBEAC.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3516
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4892
- - C:\Users\Admin\AppData\Local\Temp\service.exe
    "C:\Users\Admin\AppData\Local\Temp\service.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:3824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

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\service.exe

Filesize
63KB

MD5
ed84599b85e02fc16b0763d9158e7691

SHA1
d508b2240df9c3b36ea315aab8370ab6d76724b2

SHA256
ac038502c851488f63a577e3b51c951892c8104934ca68e05bffe8b12a3099bc

SHA512
b55cdeaeda4070f6bdce9516d47bc5037177704d9fa4ea02866bd9804ef1d8f2dd035625709b4d52d8ac4db3497bb06f2c4e19f80de5eafd8321b09897e07515

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpBEAC.tmp.bat

Filesize
154B

MD5
408599b01b27fad7012ae08d7be19ee0

SHA1
a82f8d39c07b02259391249ea0baf0c154cb92e0

SHA256
c01f63ec43e0a34339aadb7bf174a99ecfb8d6842c6c6fbf96d0c3c70f0cb4c1

SHA512
b8e47061f9b987d1b1e0b272b0e223af5a95b1058f7b21c947a15974b07371c026b975f441a4f9be99d759b444977d70bad50fcf5db804abc06c7842babe7dfd

Download Submit
memory/1164-0-0x00007FFA13EF3000-0x00007FFA13EF5000-memory.dmp

Filesize
8KB

Download
memory/1164-1-0x0000000000C20000-0x0000000000C36000-memory.dmp

Filesize
88KB

Download
memory/1164-2-0x00007FFA13EF0000-0x00007FFA149B1000-memory.dmp

Filesize
10.8MB

Download
memory/1164-7-0x00007FFA13EF0000-0x00007FFA149B1000-memory.dmp

Filesize
10.8MB

Download
memory/1164-8-0x00007FFA13EF0000-0x00007FFA149B1000-memory.dmp

Filesize
10.8MB

Download
memory/3824-15-0x000000001D190000-0x000000001D206000-memory.dmp

Filesize
472KB

Download
memory/3824-16-0x0000000002760000-0x0000000002794000-memory.dmp

Filesize
208KB

Download
memory/3824-17-0x000000001D110000-0x000000001D12E000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads