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
behavioral1/memory/1596-5-0x00000000005D0000-0x00000000005E2000-memory.dmp	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2720	microosofte.exe

Loads dropped DLL 1 IoCs

pid	Process
2552	cmd.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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	microosofte.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2f528c70be4abd7138859b6fa0990b3e.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2944	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
1920	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1596	2f528c70be4abd7138859b6fa0990b3e.exe
1596	2f528c70be4abd7138859b6fa0990b3e.exe
1596	2f528c70be4abd7138859b6fa0990b3e.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1596	2f528c70be4abd7138859b6fa0990b3e.exe
Token: SeDebugPrivilege	2720	microosofte.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1596 wrote to memory of 2808	1596	2f528c70be4abd7138859b6fa0990b3e.exe	30
PID 1596 wrote to memory of 2808	1596	2f528c70be4abd7138859b6fa0990b3e.exe	30
PID 1596 wrote to memory of 2808	1596	2f528c70be4abd7138859b6fa0990b3e.exe	30
PID 1596 wrote to memory of 2808	1596	2f528c70be4abd7138859b6fa0990b3e.exe	30
PID 1596 wrote to memory of 2552	1596	2f528c70be4abd7138859b6fa0990b3e.exe	31
PID 1596 wrote to memory of 2552	1596	2f528c70be4abd7138859b6fa0990b3e.exe	31
PID 1596 wrote to memory of 2552	1596	2f528c70be4abd7138859b6fa0990b3e.exe	31
PID 1596 wrote to memory of 2552	1596	2f528c70be4abd7138859b6fa0990b3e.exe	31
PID 2552 wrote to memory of 2944	2552	cmd.exe	34
PID 2552 wrote to memory of 2944	2552	cmd.exe	34
PID 2552 wrote to memory of 2944	2552	cmd.exe	34
PID 2552 wrote to memory of 2944	2552	cmd.exe	34
PID 2808 wrote to memory of 1920	2808	cmd.exe	35
PID 2808 wrote to memory of 1920	2808	cmd.exe	35
PID 2808 wrote to memory of 1920	2808	cmd.exe	35
PID 2808 wrote to memory of 1920	2808	cmd.exe	35
PID 2552 wrote to memory of 2720	2552	cmd.exe	36
PID 2552 wrote to memory of 2720	2552	cmd.exe	36
PID 2552 wrote to memory of 2720	2552	cmd.exe	36
PID 2552 wrote to memory of 2720	2552	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\2f528c70be4abd7138859b6fa0990b3e.exe
"C:\Users\Admin\AppData\Local\Temp\2f528c70be4abd7138859b6fa0990b3e.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1596
- 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:2808
- - 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:1920
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp3514.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2552
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2944
- - 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:2720

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

System Information Discovery

1

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\Cab59E5.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp3514.tmp.bat

Filesize
155B

MD5
96b522e88083198873b38afca162043a

SHA1
ee0b0f3c7e56f14049b6e66efdee09e6c4cc71e4

SHA256
993ee0fd98b77e152bee8f0b7ac0be1a180e5644d3bdcfb2791ac0fcc92cb260

SHA512
614c239c15ad59003cb27809e4f6db6b73e547c439841c6b1637aa9ae955b50b597dbd6c863fe97f36c895d17f3041c8341032799af334abb89d79dd703d4c8e

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

Filesize
1.2MB

MD5
2f528c70be4abd7138859b6fa0990b3e

SHA1
a917e6ab7b5a2ead8fd23829678db650fef60b46

SHA256
c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802

SHA512
a408c3af7a5942bc415727c40d5ed0b4569b48937d65871ddaf1ab458fb6566a36f7114c758b34bdb237e6d1f6c9d74755a4ff53a88da20e31e353689739e933

Download Submit
memory/1596-0-0x0000000073FBE000-0x0000000073FBF000-memory.dmp

Filesize
4KB

Download
memory/1596-1-0x0000000000AA0000-0x0000000000BD4000-memory.dmp

Filesize
1.2MB

Download
memory/1596-2-0x0000000073FB0000-0x000000007469E000-memory.dmp

Filesize
6.9MB

Download
memory/1596-3-0x0000000005070000-0x000000000513A000-memory.dmp

Filesize
808KB

Download
memory/1596-4-0x0000000073FB0000-0x000000007469E000-memory.dmp

Filesize
6.9MB

Download
memory/1596-5-0x00000000005D0000-0x00000000005E2000-memory.dmp

Filesize
72KB

Download
memory/1596-15-0x0000000073FB0000-0x000000007469E000-memory.dmp

Filesize
6.9MB

Download
memory/2720-19-0x0000000000360000-0x0000000000494000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads