asyncrat | 7d41f2fe756509c85b54522b30bc26bfedfaff42ead65e82d6de9c67c03a06d8

General

Target

InstallerPEClient1.21.exe
Size

48KB
MD5

a133aa15dff0878b51f78a73f26dcb75
SHA1

496da7070019ed5d6f0e113a2a456b6417f5fba8
SHA256

7d41f2fe756509c85b54522b30bc26bfedfaff42ead65e82d6de9c67c03a06d8
SHA512

9a7fef9d09697a71f8ce0e44a8bac041d8a7bec31a9c7c3bddc3efaecb0145a2ff96767e9ca19eca3384c6333263cf3ec55be125236a275bee7a857ccfce2fca
SSDEEP

768:quE6VTnk6gWXWUrjC1mo2qDG8VNe6X7ItFjPIBpX/bRbbYaCvRzT6Mo53J8icbfc:quE6VTn8H2FB6X84Bd/1bYrd66icjwBn

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:8808

127.0.0.1:2009

127.0.0.1:7007

Mutex

kLnHtBuoFosw

Attributes

delay
10
install
true
install_file
InstallerPeclient1.21.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x001d00000002aab3-14.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
240	InstallerPeclient1.21.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	InstallerPeclient1.21.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallerPEClient1.21.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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2248	timeout.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-556537508-2730415644-482548075-1000_Classes\Local Settings\MuiCache	MiniSearchHost.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
4040	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe
224	InstallerPEClient1.21.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	224	InstallerPEClient1.21.exe
Token: SeDebugPrivilege	240	InstallerPeclient1.21.exe
Token: SeDebugPrivilege	240	InstallerPeclient1.21.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4676	MiniSearchHost.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 224 wrote to memory of 3088	224	InstallerPEClient1.21.exe	81
PID 224 wrote to memory of 3088	224	InstallerPEClient1.21.exe	81
PID 224 wrote to memory of 3088	224	InstallerPEClient1.21.exe	81
PID 224 wrote to memory of 2468	224	InstallerPEClient1.21.exe	83
PID 224 wrote to memory of 2468	224	InstallerPEClient1.21.exe	83
PID 224 wrote to memory of 2468	224	InstallerPEClient1.21.exe	83
PID 3088 wrote to memory of 4040	3088	cmd.exe	85
PID 3088 wrote to memory of 4040	3088	cmd.exe	85
PID 3088 wrote to memory of 4040	3088	cmd.exe	85
PID 2468 wrote to memory of 2248	2468	cmd.exe	86
PID 2468 wrote to memory of 2248	2468	cmd.exe	86
PID 2468 wrote to memory of 2248	2468	cmd.exe	86
PID 2468 wrote to memory of 240	2468	cmd.exe	87
PID 2468 wrote to memory of 240	2468	cmd.exe	87
PID 2468 wrote to memory of 240	2468	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\InstallerPEClient1.21.exe
"C:\Users\Admin\AppData\Local\Temp\InstallerPEClient1.21.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:224
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "InstallerPeclient1.21" /tr '"C:\Users\Admin\AppData\Roaming\InstallerPeclient1.21.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3088
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "InstallerPeclient1.21" /tr '"C:\Users\Admin\AppData\Roaming\InstallerPeclient1.21.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4040
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9D78.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2468
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2248
- - C:\Users\Admin\AppData\Roaming\InstallerPeclient1.21.exe
    "C:\Users\Admin\AppData\Roaming\InstallerPeclient1.21.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:240

C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:4676

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\Microsoft\CLR_v4.0_32\UsageLogs\InstallerPeclient1.21.exe.log

Filesize
614B

MD5
fece27917067365b631bc648c66fe066

SHA1
f12c84b1c2b1296091ee06e8654c7065d22cbb44

SHA256
93e03593374ce40bc5d4c57832ebe96d3a6a532766eb6385f568a0383b426d10

SHA512
9b502a6d46b82ccc2c8aff650de664299f0131a82480eb9cec701546e9cd7f1647c0665014035c19da80a6cab267cf896645af827ecdd95287a70994c1ecb662

Download Submit
C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

Filesize
10KB

MD5
ed1a839eb22f7bf5807f072466237ca8

SHA1
fce8c49c79e92c3fb748e77dbd1d1affbb78c018

SHA256
8abd2f7bbfe4616e92b1534062cfac3192b561f0a4e010e3bde83356898fa664

SHA512
7ed54dc2b438a17e89cd0c7c2e90968b20e26a971d17550b26b4e945042e8032266f9eef97d7d8efea507f2a4f00a70c370861ec53b12fafcdf9a876df5a57b7

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9D78.tmp.bat

Filesize
165B

MD5
404012e297b70b93ffeb3b31f8124fb6

SHA1
ec11afdedf54223a6dc515e0a40f044e870a7e4e

SHA256
6d1cae72dd17a3a1fea7eee9b1867e15136cb9b69c997995d9809a94e886df01

SHA512
9400d585938ee1213040fea75447368b6c55ebbd6d25b4205544377cd8a0ba1066f40c61c2bcb71f1360ef92124d0440682bcc2e4fd0575397af65ba5878753f

Download Submit
C:\Users\Admin\AppData\Roaming\InstallerPeclient1.21.exe

Filesize
48KB

MD5
a133aa15dff0878b51f78a73f26dcb75

SHA1
496da7070019ed5d6f0e113a2a456b6417f5fba8

SHA256
7d41f2fe756509c85b54522b30bc26bfedfaff42ead65e82d6de9c67c03a06d8

SHA512
9a7fef9d09697a71f8ce0e44a8bac041d8a7bec31a9c7c3bddc3efaecb0145a2ff96767e9ca19eca3384c6333263cf3ec55be125236a275bee7a857ccfce2fca

Download Submit
memory/224-3-0x0000000074B80000-0x0000000075331000-memory.dmp

Filesize
7.7MB

Download
memory/224-5-0x0000000005590000-0x000000000562C000-memory.dmp

Filesize
624KB

Download
memory/224-6-0x0000000005530000-0x0000000005570000-memory.dmp

Filesize
256KB

Download
memory/224-11-0x0000000074B80000-0x0000000075331000-memory.dmp

Filesize
7.7MB

Download
memory/224-4-0x00000000050D0000-0x0000000005136000-memory.dmp

Filesize
408KB

Download
memory/224-0-0x0000000074B8E000-0x0000000074B8F000-memory.dmp

Filesize
4KB

Download
memory/224-2-0x0000000074B8E000-0x0000000074B8F000-memory.dmp

Filesize
4KB

Download
memory/224-1-0x0000000000680000-0x0000000000692000-memory.dmp

Filesize
72KB

Download
memory/240-17-0x0000000074AE0000-0x0000000075291000-memory.dmp

Filesize
7.7MB

Download
memory/240-18-0x0000000074AE0000-0x0000000075291000-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