asyncrat | c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802

General

Target

c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
Size

1.2MB
MD5

2f528c70be4abd7138859b6fa0990b3e
SHA1

a917e6ab7b5a2ead8fd23829678db650fef60b46
SHA256

c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802
SHA512

a408c3af7a5942bc415727c40d5ed0b4569b48937d65871ddaf1ab458fb6566a36f7114c758b34bdb237e6d1f6c9d74755a4ff53a88da20e31e353689739e933
SSDEEP

24576:/jAAahFflN4/3qqDZykMnAN4V4JeR7tluqCo94Z:cxDNKuABUxjuHom

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.6D

Botnet

Default

C2

seznam.zapto.org:6606

seznam.zapto.org:7707

seznam.zapto.org:8808

Mutex

tpfypmaupoo

Attributes

delay
5
install
true
install_file
microosofte.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

resource	yara_rule
behavioral2/memory/4032-11-0x0000000008020000-0x0000000008032000-memory.dmp	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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe

Executes dropped EXE 1 IoCs

pid	Process
4608	microosofte.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	microosofte.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4420	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
1256	schtasks.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
Token: SeDebugPrivilege	4608	microosofte.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4032 wrote to memory of 1128	4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe	101
PID 4032 wrote to memory of 1128	4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe	101
PID 4032 wrote to memory of 1128	4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe	101
PID 4032 wrote to memory of 5084	4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe	103
PID 4032 wrote to memory of 5084	4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe	103
PID 4032 wrote to memory of 5084	4032	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe	103
PID 1128 wrote to memory of 1256	1128	cmd.exe	105
PID 1128 wrote to memory of 1256	1128	cmd.exe	105
PID 1128 wrote to memory of 1256	1128	cmd.exe	105
PID 5084 wrote to memory of 4420	5084	cmd.exe	106
PID 5084 wrote to memory of 4420	5084	cmd.exe	106
PID 5084 wrote to memory of 4420	5084	cmd.exe	106
PID 5084 wrote to memory of 4608	5084	cmd.exe	108
PID 5084 wrote to memory of 4608	5084	cmd.exe	108
PID 5084 wrote to memory of 4608	5084	cmd.exe	108

C:\Users\Admin\AppData\Local\Temp\c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
"C:\Users\Admin\AppData\Local\Temp\c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4032
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /ru system /rl highest /tn c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802 /tr '"C:\Users\Admin\AppData\Roaming\microosofte.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1128
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /ru system /rl highest /tn c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802 /tr '"C:\Users\Admin\AppData\Roaming\microosofte.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1256
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7376.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5084
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4420
- - C:\Users\Admin\AppData\Roaming\microosofte.exe
    "C:\Users\Admin\AppData\Roaming\microosofte.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:4608

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4228,i,10369132178352108590,11047993562598554317,262144 --variations-seed-version --mojo-platform-channel-handle=3740 /prefetch:8
1⤵
PID:2364

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

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp7376.tmp.bat

Filesize
155B

MD5
9fdf6525e1a5fb97d78b2ad05ca769da

SHA1
b3cdfc796bbf91a3dc70f2aa88c347751242cf24

SHA256
2abb57701481b350271e2aaa261c7aeb7fc09ceff75203517194d7c237280630

SHA512
0fe9a21346a008262aa36475269f95a0ae8b56ce3a61425d98f6b51d1192d41f11f7dcc3f82e3caf281cd6058866fa2e1838e36516c5a3d081ef9a0aa0ac6178

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

Filesize
1.2MB

MD5
2f528c70be4abd7138859b6fa0990b3e

SHA1
a917e6ab7b5a2ead8fd23829678db650fef60b46

SHA256
c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802

SHA512
a408c3af7a5942bc415727c40d5ed0b4569b48937d65871ddaf1ab458fb6566a36f7114c758b34bdb237e6d1f6c9d74755a4ff53a88da20e31e353689739e933

Download Submit
memory/4032-8-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/4032-11-0x0000000008020000-0x0000000008032000-memory.dmp

Filesize
72KB

Download
memory/4032-4-0x0000000004C40000-0x0000000004CDC000-memory.dmp

Filesize
624KB

Download
memory/4032-5-0x0000000004BB0000-0x0000000004BBA000-memory.dmp

Filesize
40KB

Download
memory/4032-6-0x0000000004DD0000-0x0000000004E26000-memory.dmp

Filesize
344KB

Download
memory/4032-7-0x0000000005750000-0x00000000058F6000-memory.dmp

Filesize
1.6MB

Download
memory/4032-0-0x000000007493E000-0x000000007493F000-memory.dmp

Filesize
4KB

Download
memory/4032-9-0x00000000063E0000-0x00000000064AA000-memory.dmp

Filesize
808KB

Download
memory/4032-10-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/4032-3-0x0000000004B00000-0x0000000004B92000-memory.dmp

Filesize
584KB

Download
memory/4032-16-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/4032-2-0x0000000004FF0000-0x0000000005594000-memory.dmp

Filesize
5.6MB

Download
memory/4032-1-0x0000000000120000-0x0000000000254000-memory.dmp

Filesize
1.2MB

Download
memory/4608-21-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/4608-22-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/4608-23-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/4608-24-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads