asyncrat | 859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac

General

Target

859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe
Size

1.9MB
MD5

15580dae4a38e0ee4581c1cb3b1d98eb
SHA1

493a4b1a0207ea640efed703e4680ca4a73dfab9
SHA256

859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac
SHA512

712a4ff9c0d401c757c162cf91094fc5e977e3183cce364415823fe78f44e83d0e128730f25d2fcfae3319148118c0512d4fbc5b6fd608a3677b957209132ebd
SSDEEP

24576:SbgHrheVS3QUa4EbvAH8MeRaW8OF+91iYv4Y22cMUrRnZlRvdseSb1WS8b7zF61A:SOeQQr4EbvdQOQiYvku23rsZWS8b7ZX

Score

10^/10

asyncrat default discovery rat upx

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

allay.f3322.net:5050

Mutex

fgidvwdtbfcdtau

Attributes

delay
1
install
true
install_file
WriteFile.exe
install_folder
%AppData%

aes.plain

Signatures

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

VenomRAT 3 IoCs

Detects VenomRAT.

rat

Processes:

resource	yara_rule
C:\Client.exe	VenomRAT
behavioral1/memory/1692-58-0x0000000000D00000-0x0000000000D18000-memory.dmp	VenomRAT
behavioral1/memory/3060-75-0x0000000001290000-0x00000000012A8000-memory.dmp	VenomRAT

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Client.exe	family_asyncrat

Executes dropped EXE 2 IoCs

Processes:

Client.exeWriteFile.exe

pid process

1692 Client.exe
3060 WriteFile.exe

pid	process
1692	Client.exe
3060	WriteFile.exe

UPX packed file 27 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/memory/1820-4-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-6-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-5-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-48-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-50-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-47-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-45-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-43-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-39-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-37-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-35-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-29-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-27-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-21-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-19-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-17-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-13-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-11-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-9-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-7-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-41-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-34-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-31-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-26-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-24-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/1820-55-0x0000000068CD0000-0x0000000068CDF000-memory.dmp	upx
behavioral1/memory/1820-15-0x0000000010000000-0x000000001003C000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3016 1820 WerFault.exe 859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe

pid	pid_target	process	target process
3016	1820	WerFault.exe	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe

System Location Discovery: System Language Discovery 1 TTPs 1 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

Processes:

859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2884 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

Processes:

schtasks.exe

pid process

3044 schtasks.exe

pid	process
2884	timeout.exe

pid	process
3044	schtasks.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exeClient.exeWriteFile.exe

pid	process
1820	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe
1692	Client.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe
3060	WriteFile.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exeClient.exeWriteFile.exe

description	pid	process
Token: SeSystemtimePrivilege	1820	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe
Token: SeDebugPrivilege	1692	Client.exe
Token: SeDebugPrivilege	3060	WriteFile.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exeWriteFile.exe

pid	process
1820	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe
1820	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe
1820	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe
3060	WriteFile.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exeClient.execmd.execmd.exe

description	pid	process	target process
PID 1820 wrote to memory of 1692	1820	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe	Client.exe
PID 1820 wrote to memory of 1692	1820	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe	Client.exe
PID 1820 wrote to memory of 1692	1820	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe	Client.exe
PID 1820 wrote to memory of 1692	1820	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe	Client.exe
PID 1820 wrote to memory of 3016	1820	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe	WerFault.exe
PID 1820 wrote to memory of 3016	1820	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe	WerFault.exe
PID 1820 wrote to memory of 3016	1820	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe	WerFault.exe
PID 1820 wrote to memory of 3016	1820	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe	WerFault.exe
PID 1692 wrote to memory of 2908	1692	Client.exe	cmd.exe
PID 1692 wrote to memory of 2908	1692	Client.exe	cmd.exe
PID 1692 wrote to memory of 2908	1692	Client.exe	cmd.exe
PID 1692 wrote to memory of 2980	1692	Client.exe	cmd.exe
PID 1692 wrote to memory of 2980	1692	Client.exe	cmd.exe
PID 1692 wrote to memory of 2980	1692	Client.exe	cmd.exe
PID 2980 wrote to memory of 2884	2980	cmd.exe	timeout.exe
PID 2980 wrote to memory of 2884	2980	cmd.exe	timeout.exe
PID 2980 wrote to memory of 2884	2980	cmd.exe	timeout.exe
PID 2908 wrote to memory of 3044	2908	cmd.exe	schtasks.exe
PID 2908 wrote to memory of 3044	2908	cmd.exe	schtasks.exe
PID 2908 wrote to memory of 3044	2908	cmd.exe	schtasks.exe
PID 2980 wrote to memory of 3060	2980	cmd.exe	WriteFile.exe
PID 2980 wrote to memory of 3060	2980	cmd.exe	WriteFile.exe
PID 2980 wrote to memory of 3060	2980	cmd.exe	WriteFile.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe
"C:\Users\Admin\AppData\Local\Temp\859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1820
- C:\Client.exe
  "C:\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1692
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WriteFile" /tr '"C:\Users\Admin\AppData\Roaming\WriteFile.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2908
  - - C:\Windows\system32\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "WriteFile" /tr '"C:\Users\Admin\AppData\Roaming\WriteFile.exe"'
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:3044
- - C:\Windows\system32\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpCB89.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2980
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:2884
  - - C:\Users\Admin\AppData\Roaming\WriteFile.exe
      "C:\Users\Admin\AppData\Roaming\WriteFile.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:3060
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1820 -s 944
  2⤵
  - Program crash
  PID:3016

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

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:\Client.exe

Filesize
74KB

MD5
91b01e99b841549fb21482b956ac78cf

SHA1
82d240f2c2ae343f4d7c6fd37af7e41374935a5f

SHA256
6036f85e4763107b83190d95294b87202d451a2548f4b90cc862ea81f269c0db

SHA512
10acfdd4d14ca93b2b05932b16b4940afff020aa18f6ded0799749e0f793f8fc94874cf5e55fb2acf041e233cc0bedcc272cadfbb5d4516f9abdcd6ef18d9b0a

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpCB89.tmp.bat

Filesize
153B

MD5
b0420c54abcb829bab446c68338e6bf1

SHA1
3500a01eb47de73d355eb43563faba0f90f75fdf

SHA256
9a5fd5b640bca684240f617bbe44e44845cec7ef3a437b00e9086d79e21bebfa

SHA512
f4c8471cd1b2298fe7ce54ac5c4888ffe48f7a8c79d950d2338db1964eb6650daafe11be3c8297b09df91d2ac8320cede00e0f431cb8c589d3c0f2121b6ad1fc

Download Submit
C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
memory/1692-71-0x000007FEF5E50000-0x000007FEF683C000-memory.dmp

Filesize
9.9MB

Download
memory/1692-69-0x000007FEF5E50000-0x000007FEF683C000-memory.dmp

Filesize
9.9MB

Download
memory/1692-60-0x000007FEF5E50000-0x000007FEF683C000-memory.dmp

Filesize
9.9MB

Download
memory/1692-58-0x0000000000D00000-0x0000000000D18000-memory.dmp

Filesize
96KB

Download
memory/1692-57-0x000007FEF5E53000-0x000007FEF5E54000-memory.dmp

Filesize
4KB

Download
memory/1820-9-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-34-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-35-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-29-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-27-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-21-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-19-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-17-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-13-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-11-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-4-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-7-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-41-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-37-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-31-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-26-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-24-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-39-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-55-0x0000000068CD0000-0x0000000068CDF000-memory.dmp

Filesize
60KB

Download
memory/1820-15-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-43-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-45-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-47-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-50-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-48-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-5-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/1820-6-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3060-75-0x0000000001290000-0x00000000012A8000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads