asyncrat | 266d369c706e77dc4af02a23e99c0c27ecb6aad8a44b9976255f04cc921ccec6

General

Target

Ui-Updater.exe
Size

63KB
MD5

d149276a9977e3789efbc394d2420479
SHA1

71649fa0d6fa99a590b5b3e50b82f4aa50592f1a
SHA256

266d369c706e77dc4af02a23e99c0c27ecb6aad8a44b9976255f04cc921ccec6
SHA512

596158d51d89d9ee2ce7cb773eec6b712bb62a91485cb46cf69e3818a3eccda3ab62a289a497fddb3b51b0e29811318d0a8dc5bd675b037c18b34d8359654e79
SSDEEP

1536:HeQPc9ynqdyp7jykr1RCYUbnh5McIuIdpqKmY7:HeDiXAYUbnfeGz

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

more-entered.gl.at.ply.gg:2000

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

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Windows.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:

Ui-Updater.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	Ui-Updater.exe

Executes dropped EXE 1 IoCs

Processes:

Windows.exe

pid process

4176 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

Processes:

timeout.exe

pid process

2308 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

4168 schtasks.exe

pid	process
4176	Windows.exe

pid	process
2308	timeout.exe

pid	process
4168	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

Ui-Updater.exe

pid	process
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe
5068	Ui-Updater.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Ui-Updater.exeWindows.exe

description	pid	process
Token: SeDebugPrivilege	5068	Ui-Updater.exe
Token: SeDebugPrivilege	5068	Ui-Updater.exe
Token: SeDebugPrivilege	4176	Windows.exe
Token: SeDebugPrivilege	4176	Windows.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

Ui-Updater.execmd.execmd.exe

description	pid	process	target process
PID 5068 wrote to memory of 3992	5068	Ui-Updater.exe	cmd.exe
PID 5068 wrote to memory of 3992	5068	Ui-Updater.exe	cmd.exe
PID 5068 wrote to memory of 4824	5068	Ui-Updater.exe	cmd.exe
PID 5068 wrote to memory of 4824	5068	Ui-Updater.exe	cmd.exe
PID 3992 wrote to memory of 4168	3992	cmd.exe	schtasks.exe
PID 3992 wrote to memory of 4168	3992	cmd.exe	schtasks.exe
PID 4824 wrote to memory of 2308	4824	cmd.exe	timeout.exe
PID 4824 wrote to memory of 2308	4824	cmd.exe	timeout.exe
PID 4824 wrote to memory of 4176	4824	cmd.exe	Windows.exe
PID 4824 wrote to memory of 4176	4824	cmd.exe	Windows.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\Ui-Updater.exe
"C:\Users\Admin\AppData\Local\Temp\Ui-Updater.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5068
- 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:3992
- - 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:4168
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA74C.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4824
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2308
- - C:\Users\Admin\AppData\Roaming\Windows.exe
    "C:\Users\Admin\AppData\Roaming\Windows.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4176

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\tmpA74C.tmp.bat

Filesize
151B

MD5
3c1e44a4c8e3a2fd9b7b55a3f367994d

SHA1
ba9717027cfa514129c25380a7b966b996024803

SHA256
e2844c946b6edaabb06b9666bcb3967ddc31d56075a12308d29bb39622ff22b5

SHA512
fd37de85f52fc74db6a4b03d8761e8e57411581bd0d3d1afc0530b72b61056b14fbed54d7a410be4fe8243a67692aebe3fa98a300abe1c73e5ae4441f207a18b

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

Filesize
63KB

MD5
d149276a9977e3789efbc394d2420479

SHA1
71649fa0d6fa99a590b5b3e50b82f4aa50592f1a

SHA256
266d369c706e77dc4af02a23e99c0c27ecb6aad8a44b9976255f04cc921ccec6

SHA512
596158d51d89d9ee2ce7cb773eec6b712bb62a91485cb46cf69e3818a3eccda3ab62a289a497fddb3b51b0e29811318d0a8dc5bd675b037c18b34d8359654e79

Download Submit
memory/5068-1-0x00000000000A0000-0x00000000000B6000-memory.dmp

Filesize
88KB

Download
memory/5068-0-0x00007FF91EC93000-0x00007FF91EC95000-memory.dmp

Filesize
8KB

Download
memory/5068-2-0x00007FF91EC90000-0x00007FF91F751000-memory.dmp

Filesize
10.8MB

Download
memory/5068-8-0x00007FF91EC90000-0x00007FF91F751000-memory.dmp

Filesize
10.8MB

Download
memory/5068-7-0x00007FF91EC90000-0x00007FF91F751000-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