asyncrat | c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802

General

Target

2f528c70be4abd7138859b6fa0990b3e.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/2380-11-0x0000000002FB0000-0x0000000002FC2000-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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	2f528c70be4abd7138859b6fa0990b3e.exe

Executes dropped EXE 1 IoCs

pid	Process
2648	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	microosofte.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2f528c70be4abd7138859b6fa0990b3e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3552	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
2536	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe
2380	2f528c70be4abd7138859b6fa0990b3e.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2380	2f528c70be4abd7138859b6fa0990b3e.exe
Token: SeDebugPrivilege	2648	microosofte.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 4216	2380	2f528c70be4abd7138859b6fa0990b3e.exe	91
PID 2380 wrote to memory of 4216	2380	2f528c70be4abd7138859b6fa0990b3e.exe	91
PID 2380 wrote to memory of 4216	2380	2f528c70be4abd7138859b6fa0990b3e.exe	91
PID 2380 wrote to memory of 1540	2380	2f528c70be4abd7138859b6fa0990b3e.exe	93
PID 2380 wrote to memory of 1540	2380	2f528c70be4abd7138859b6fa0990b3e.exe	93
PID 2380 wrote to memory of 1540	2380	2f528c70be4abd7138859b6fa0990b3e.exe	93
PID 1540 wrote to memory of 3552	1540	cmd.exe	95
PID 1540 wrote to memory of 3552	1540	cmd.exe	95
PID 1540 wrote to memory of 3552	1540	cmd.exe	95
PID 4216 wrote to memory of 2536	4216	cmd.exe	96
PID 4216 wrote to memory of 2536	4216	cmd.exe	96
PID 4216 wrote to memory of 2536	4216	cmd.exe	96
PID 1540 wrote to memory of 2648	1540	cmd.exe	98
PID 1540 wrote to memory of 2648	1540	cmd.exe	98
PID 1540 wrote to memory of 2648	1540	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\2f528c70be4abd7138859b6fa0990b3e.exe
"C:\Users\Admin\AppData\Local\Temp\2f528c70be4abd7138859b6fa0990b3e.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /ru system /rl highest /tn 2f528c70be4abd7138859b6fa0990b3e /tr '"C:\Users\Admin\AppData\Roaming\microosofte.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4216
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /ru system /rl highest /tn 2f528c70be4abd7138859b6fa0990b3e /tr '"C:\Users\Admin\AppData\Roaming\microosofte.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2536
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6C53.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1540
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3552
- - 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:2648

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp6C53.tmp.bat

Filesize
155B

MD5
a2cbe60c1b7bfa0c0bd5674fdf428f67

SHA1
54b20df209a35bf03bb3853cbf3fffe4a7aefb4a

SHA256
79ba45adac07e27de37da3aaef07cf0b76f021a27730ff18cae2e3ef7ca5dbaa

SHA512
a61e059a611e8023b60a5566537f14a71b12e45b79261d46cceb8b0cc1a582667b8f5753aa3095435faf90fc00ba7243518cdd730e5a08bdc6a8cb102748f8d4

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

Filesize
1.2MB

MD5
2f528c70be4abd7138859b6fa0990b3e

SHA1
a917e6ab7b5a2ead8fd23829678db650fef60b46

SHA256
c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802

SHA512
a408c3af7a5942bc415727c40d5ed0b4569b48937d65871ddaf1ab458fb6566a36f7114c758b34bdb237e6d1f6c9d74755a4ff53a88da20e31e353689739e933

Download Submit
memory/2380-10-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/2380-11-0x0000000002FB0000-0x0000000002FC2000-memory.dmp

Filesize
72KB

Download
memory/2380-4-0x00000000057F0000-0x000000000588C000-memory.dmp

Filesize
624KB

Download
memory/2380-5-0x0000000005720000-0x000000000572A000-memory.dmp

Filesize
40KB

Download
memory/2380-6-0x0000000005A10000-0x0000000005A66000-memory.dmp

Filesize
344KB

Download
memory/2380-7-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/2380-8-0x00000000062B0000-0x0000000006456000-memory.dmp

Filesize
1.6MB

Download
memory/2380-9-0x00000000074C0000-0x000000000758A000-memory.dmp

Filesize
808KB

Download
memory/2380-0-0x000000007522E000-0x000000007522F000-memory.dmp

Filesize
4KB

Download
memory/2380-3-0x0000000005750000-0x00000000057E2000-memory.dmp

Filesize
584KB

Download
memory/2380-2-0x0000000005D00000-0x00000000062A4000-memory.dmp

Filesize
5.6MB

Download
memory/2380-17-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/2380-1-0x0000000000C00000-0x0000000000D34000-memory.dmp

Filesize
1.2MB

Download
memory/2648-21-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/2648-22-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/2648-25-0x0000000009760000-0x00000000097C6000-memory.dmp

Filesize
408KB

Download
memory/2648-26-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/2648-27-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads