asyncrat | 1ccb19bdec6cace0ada3cfae352a6804a96d58aff9b2f0d71c7e3f0a1c71188b

General

Target

07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8.exe
Size

47KB
MD5

67e32a73f545f56e1292d6b318f8e3c4
SHA1

96ca16f9a5b6e359f0dccfa0d6c7532ff047da09
SHA256

07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8
SHA512

5ab019270b836231ba7f8b9a5c60bececc02a461f8978424708c7d8460c09347a5a8a1a3ee3b2b54f87a4faf0a4216c9d5e9ccf06dddd932fb93195a4c0df644
SSDEEP

768:guwpFTAY3IQWUe9jqmo2qLj4Q3ijkBPI6Lvl1T0bg7J3HvcNv8OBDZQx:guwpFTA4/2W7Ve6LvlKbg7ZP+bdQx

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

176.111.174.140:6606

176.111.174.140:7707

176.111.174.140:8808

Mutex

QaF6X2cpj8fc

Attributes

delay
3
install
true
install_file
svchost.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/files/0x00080000000120fd-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2996	svchost.exe

Loads dropped DLL 1 IoCs

pid	Process
2876	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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2872	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
2700	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2488	07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8.exe
2488	07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8.exe
2488	07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2488	07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8.exe
Token: SeDebugPrivilege	2996	svchost.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2488 wrote to memory of 2748	2488	07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8.exe	30
PID 2488 wrote to memory of 2748	2488	07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8.exe	30
PID 2488 wrote to memory of 2748	2488	07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8.exe	30
PID 2488 wrote to memory of 2748	2488	07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8.exe	30
PID 2488 wrote to memory of 2876	2488	07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8.exe	31
PID 2488 wrote to memory of 2876	2488	07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8.exe	31
PID 2488 wrote to memory of 2876	2488	07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8.exe	31
PID 2488 wrote to memory of 2876	2488	07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8.exe	31
PID 2876 wrote to memory of 2872	2876	cmd.exe	34
PID 2876 wrote to memory of 2872	2876	cmd.exe	34
PID 2876 wrote to memory of 2872	2876	cmd.exe	34
PID 2876 wrote to memory of 2872	2876	cmd.exe	34
PID 2748 wrote to memory of 2700	2748	cmd.exe	35
PID 2748 wrote to memory of 2700	2748	cmd.exe	35
PID 2748 wrote to memory of 2700	2748	cmd.exe	35
PID 2748 wrote to memory of 2700	2748	cmd.exe	35
PID 2876 wrote to memory of 2996	2876	cmd.exe	36
PID 2876 wrote to memory of 2996	2876	cmd.exe	36
PID 2876 wrote to memory of 2996	2876	cmd.exe	36
PID 2876 wrote to memory of 2996	2876	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8.exe
"C:\Users\Admin\AppData\Local\Temp\07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2488
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2748
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2700
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp34A7.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2876
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2872
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2996

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\CabB6A4.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp34A7.tmp.bat

Filesize
151B

MD5
40c16e6f40c4c06009e6e21111358bca

SHA1
23bf1602ef1c7da876bb32201183a37b8d57aef7

SHA256
7a6d5d7decdf94344a5af6e21c37d92762a6ceda0eb6b8e6f97d3c8e7a1b70ae

SHA512
771840537d2dc80412a7bd189ee06016298494d006b7e5dae924413718613c6dd4720c93b48ae1959c4af1fa49849b4cde259bdfcd7ee05e3dd230e4492f7ef8

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

Filesize
47KB

MD5
67e32a73f545f56e1292d6b318f8e3c4

SHA1
96ca16f9a5b6e359f0dccfa0d6c7532ff047da09

SHA256
07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8

SHA512
5ab019270b836231ba7f8b9a5c60bececc02a461f8978424708c7d8460c09347a5a8a1a3ee3b2b54f87a4faf0a4216c9d5e9ccf06dddd932fb93195a4c0df644

Download Submit
memory/2488-0-0x0000000073F5E000-0x0000000073F5F000-memory.dmp

Filesize
4KB

Download
memory/2488-1-0x0000000000E80000-0x0000000000E92000-memory.dmp

Filesize
72KB

Download
memory/2488-2-0x0000000073F50000-0x000000007463E000-memory.dmp

Filesize
6.9MB

Download
memory/2488-11-0x0000000073F50000-0x000000007463E000-memory.dmp

Filesize
6.9MB

Download
memory/2996-16-0x0000000000DD0000-0x0000000000DE2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads