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 2 IoCs

Detects VenomRAT.

rat

Processes:

resource	yara_rule
C:\Client.exe	VenomRAT
behavioral2/memory/5060-61-0x00000000005C0000-0x00000000005D8000-memory.dmp	VenomRAT

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Client.exe	family_asyncrat

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exeClient.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	Client.exe

Executes dropped EXE 2 IoCs

Processes:

Client.exeWriteFile.exe

pid process

5060 Client.exe
5084 WriteFile.exe

pid	process
5060	Client.exe
5084	WriteFile.exe

UPX packed file 27 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3136-0-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-27-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-39-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-49-0x0000000068CD0000-0x0000000068CDF000-memory.dmp	upx
behavioral2/memory/3136-47-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-45-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-44-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-41-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-37-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-35-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-33-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-31-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-29-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-25-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-23-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-21-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-20-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-18-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-15-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-13-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-11-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-9-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-8-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-3-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-2-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-1-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral2/memory/3136-5-0x0000000010000000-0x000000001003C000-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

1856 3136 WerFault.exe 859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe

pid	pid_target	process	target process
1856	3136	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

4180 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

4348 schtasks.exe

pid	process
4180	timeout.exe

pid	process
4348	schtasks.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

Processes:

859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exeClient.exeWriteFile.exe

pid	process
3136	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe
3136	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe
5060	Client.exe
5060	Client.exe
5060	Client.exe
5060	Client.exe
5060	Client.exe
5060	Client.exe
5060	Client.exe
5060	Client.exe
5060	Client.exe
5060	Client.exe
5060	Client.exe
5060	Client.exe
5060	Client.exe
5060	Client.exe
5060	Client.exe
5060	Client.exe
5060	Client.exe
5084	WriteFile.exe
5084	WriteFile.exe
5084	WriteFile.exe
5084	WriteFile.exe
5084	WriteFile.exe
5084	WriteFile.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client.exeWriteFile.exe

description pid process

Token: SeDebugPrivilege 5060 Client.exe
Token: SeDebugPrivilege 5084 WriteFile.exe

description	pid	process
Token: SeDebugPrivilege	5060	Client.exe
Token: SeDebugPrivilege	5084	WriteFile.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exeWriteFile.exe

pid	process
3136	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe
3136	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe
3136	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe
5084	WriteFile.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exeClient.execmd.execmd.exe

description	pid	process	target process
PID 3136 wrote to memory of 5060	3136	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe	Client.exe
PID 3136 wrote to memory of 5060	3136	859e715607c56783ca86527dc6e6696d741030b10d9c17a911ddf933d6ebe4ac.exe	Client.exe
PID 5060 wrote to memory of 728	5060	Client.exe	cmd.exe
PID 5060 wrote to memory of 728	5060	Client.exe	cmd.exe
PID 5060 wrote to memory of 968	5060	Client.exe	cmd.exe
PID 5060 wrote to memory of 968	5060	Client.exe	cmd.exe
PID 728 wrote to memory of 4348	728	cmd.exe	schtasks.exe
PID 728 wrote to memory of 4348	728	cmd.exe	schtasks.exe
PID 968 wrote to memory of 4180	968	cmd.exe	timeout.exe
PID 968 wrote to memory of 4180	968	cmd.exe	timeout.exe
PID 968 wrote to memory of 5084	968	cmd.exe	WriteFile.exe
PID 968 wrote to memory of 5084	968	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⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3136
- C:\Client.exe
  "C:\Client.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5060
- - 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:728
  - - 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:4348
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp78FF.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:968
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:4180
  - - 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:5084
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3136 -s 1756
  2⤵
  - Program crash
  PID:1856

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3136 -ip 3136
1⤵
PID:232

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

2

T1012

System Information Discovery

2

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\tmp78FF.tmp.bat

Filesize
153B

MD5
821287c3ce445acbe2745f1ba47dd561

SHA1
630852ac90f8e6ee048d5e39e6058698692c8333

SHA256
e1ea2b11361daa54a3a9359641b08d985b9b456a7688c9c6054ba79e6005c76d

SHA512
4898227be9108aefaf3a3be06dad348f00fa632dcc972c2829f02cc343c83ec36aef34b18823e9ef6cdd9e94d78685ef795268ac7643c51465c8e33b1ebdeefe

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

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
memory/3136-9-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-8-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-45-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-44-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-49-0x0000000068CD0000-0x0000000068CDF000-memory.dmp

Filesize
60KB

Download
memory/3136-23-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-20-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-37-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-35-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-33-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-31-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-39-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-29-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-25-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-27-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-21-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-41-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-18-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-15-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-13-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-11-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-0-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-47-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-3-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-2-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-1-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/3136-5-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/5060-63-0x00007FF9CB050000-0x00007FF9CBB11000-memory.dmp

Filesize
10.8MB

Download
memory/5060-68-0x00007FF9CB050000-0x00007FF9CBB11000-memory.dmp

Filesize
10.8MB

Download
memory/5060-69-0x00007FF9CB050000-0x00007FF9CBB11000-memory.dmp

Filesize
10.8MB

Download
memory/5060-61-0x00000000005C0000-0x00000000005D8000-memory.dmp

Filesize
96KB

Download
memory/5060-60-0x00007FF9CB053000-0x00007FF9CB055000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads