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 2 IoCs

rat

resource	yara_rule
behavioral1/memory/900-5-0x0000000000480000-0x0000000000492000-memory.dmp	family_asyncrat
behavioral1/memory/2888-20-0x00000000004E0000-0x00000000004F2000-memory.dmp	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2888	microosofte.exe

Loads dropped DLL 1 IoCs

pid	Process
2236	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	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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	microosofte.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2084	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
2712	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
900	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	900	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
Token: SeDebugPrivilege	2888	microosofte.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 900 wrote to memory of 1492	900	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe	29
PID 900 wrote to memory of 1492	900	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe	29
PID 900 wrote to memory of 1492	900	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe	29
PID 900 wrote to memory of 1492	900	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe	29
PID 900 wrote to memory of 2236	900	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe	31
PID 900 wrote to memory of 2236	900	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe	31
PID 900 wrote to memory of 2236	900	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe	31
PID 900 wrote to memory of 2236	900	c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe	31
PID 1492 wrote to memory of 2712	1492	cmd.exe	33
PID 1492 wrote to memory of 2712	1492	cmd.exe	33
PID 1492 wrote to memory of 2712	1492	cmd.exe	33
PID 1492 wrote to memory of 2712	1492	cmd.exe	33
PID 2236 wrote to memory of 2084	2236	cmd.exe	34
PID 2236 wrote to memory of 2084	2236	cmd.exe	34
PID 2236 wrote to memory of 2084	2236	cmd.exe	34
PID 2236 wrote to memory of 2084	2236	cmd.exe	34
PID 2236 wrote to memory of 2888	2236	cmd.exe	35
PID 2236 wrote to memory of 2888	2236	cmd.exe	35
PID 2236 wrote to memory of 2888	2236	cmd.exe	35
PID 2236 wrote to memory of 2888	2236	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe
"C:\Users\Admin\AppData\Local\Temp\c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:900
- 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:1492
- - 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:2712
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpC9D4.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2236
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2084
- - 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:2888

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\tmpC9D4.tmp.bat

Filesize
155B

MD5
c71e4bd3032d918917090e023661910c

SHA1
e439bcaa600ddf5939dca276e5340a80d2a17de2

SHA256
e407d2a430042a80602d8645b5f3bf306e29d5ec72c0160bd9960d440369555c

SHA512
cffd1b1141fb8040d5a27d8db27da667b22531a1769a09e657beedee2f0a829f29fc384f5f6e5651661a3703a82831dc073c9dc3b83404c8ce3d351e0cc852c8

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

Filesize
1.2MB

MD5
2f528c70be4abd7138859b6fa0990b3e

SHA1
a917e6ab7b5a2ead8fd23829678db650fef60b46

SHA256
c603849b79b5472bf8733f8c5d7f39bd886e6ce3d61b3cc7d7b4278e3a599802

SHA512
a408c3af7a5942bc415727c40d5ed0b4569b48937d65871ddaf1ab458fb6566a36f7114c758b34bdb237e6d1f6c9d74755a4ff53a88da20e31e353689739e933

Download Submit
memory/900-0-0x0000000073E7E000-0x0000000073E7F000-memory.dmp

Filesize
4KB

Download
memory/900-1-0x0000000000F00000-0x0000000001034000-memory.dmp

Filesize
1.2MB

Download
memory/900-2-0x0000000073E70000-0x000000007455E000-memory.dmp

Filesize
6.9MB

Download
memory/900-3-0x0000000004E70000-0x0000000004F3A000-memory.dmp

Filesize
808KB

Download
memory/900-4-0x0000000073E70000-0x000000007455E000-memory.dmp

Filesize
6.9MB

Download
memory/900-5-0x0000000000480000-0x0000000000492000-memory.dmp

Filesize
72KB

Download
memory/900-15-0x0000000073E70000-0x000000007455E000-memory.dmp

Filesize
6.9MB

Download
memory/2888-19-0x00000000013A0000-0x00000000014D4000-memory.dmp

Filesize
1.2MB

Download
memory/2888-20-0x00000000004E0000-0x00000000004F2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads