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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	Ui-Updater.exe

Executes dropped EXE 1 IoCs

Processes:

Windows.exe

pid process

2492 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

3608 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

2828 schtasks.exe

pid	process
2492	Windows.exe

pid	process
3608	timeout.exe

pid	process
2828	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

Ui-Updater.exe

pid	process
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe
2976	Ui-Updater.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Ui-Updater.exeWindows.exe

description	pid	process
Token: SeDebugPrivilege	2976	Ui-Updater.exe
Token: SeDebugPrivilege	2976	Ui-Updater.exe
Token: SeDebugPrivilege	2492	Windows.exe
Token: SeDebugPrivilege	2492	Windows.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

Ui-Updater.execmd.execmd.exe

description	pid	process	target process
PID 2976 wrote to memory of 3368	2976	Ui-Updater.exe	cmd.exe
PID 2976 wrote to memory of 3368	2976	Ui-Updater.exe	cmd.exe
PID 2976 wrote to memory of 4148	2976	Ui-Updater.exe	cmd.exe
PID 2976 wrote to memory of 4148	2976	Ui-Updater.exe	cmd.exe
PID 3368 wrote to memory of 2828	3368	cmd.exe	schtasks.exe
PID 3368 wrote to memory of 2828	3368	cmd.exe	schtasks.exe
PID 4148 wrote to memory of 3608	4148	cmd.exe	timeout.exe
PID 4148 wrote to memory of 3608	4148	cmd.exe	timeout.exe
PID 4148 wrote to memory of 2492	4148	cmd.exe	Windows.exe
PID 4148 wrote to memory of 2492	4148	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:2976
- 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:3368
- - 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:2828
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA613.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4148
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3608
- - C:\Users\Admin\AppData\Roaming\Windows.exe
    "C:\Users\Admin\AppData\Roaming\Windows.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2492

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\tmpA613.tmp.bat

Filesize
151B

MD5
0194e618fb09828bc1c30a13f0d7212b

SHA1
d0fdadd56d215964b5669e3da909f9f8c8b787f3

SHA256
78c5802bce964e6ed5946d0e556373782e7a9404948a30c78e6b9f2d3eb348cd

SHA512
6878609df58c2162bea9c4a87131b549daab35cbe63f9e0ee6adcf6f3f155dc1528e0241cdf7f736d18bfefdce905a3d827fefcc7e491f444e3e358a30c8e24e

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

Filesize
63KB

MD5
d149276a9977e3789efbc394d2420479

SHA1
71649fa0d6fa99a590b5b3e50b82f4aa50592f1a

SHA256
266d369c706e77dc4af02a23e99c0c27ecb6aad8a44b9976255f04cc921ccec6

SHA512
596158d51d89d9ee2ce7cb773eec6b712bb62a91485cb46cf69e3818a3eccda3ab62a289a497fddb3b51b0e29811318d0a8dc5bd675b037c18b34d8359654e79

Download Submit
memory/2492-15-0x000000001D160000-0x000000001D1D6000-memory.dmp

Filesize
472KB

Download
memory/2492-16-0x000000001D0E0000-0x000000001D114000-memory.dmp

Filesize
208KB

Download
memory/2492-17-0x0000000002480000-0x000000000249E000-memory.dmp

Filesize
120KB

Download
memory/2976-0-0x00007FFAC2433000-0x00007FFAC2435000-memory.dmp

Filesize
8KB

Download
memory/2976-1-0x0000000000740000-0x0000000000756000-memory.dmp

Filesize
88KB

Download
memory/2976-2-0x00007FFAC2430000-0x00007FFAC2EF1000-memory.dmp

Filesize
10.8MB

Download
memory/2976-7-0x00007FFAC2430000-0x00007FFAC2EF1000-memory.dmp

Filesize
10.8MB

Download
memory/2976-8-0x00007FFAC2430000-0x00007FFAC2EF1000-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