asyncrat | 39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739

General

Target

39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe
Size

1.9MB
MD5

4be3faf962aeccdded46157b294bf623
SHA1

77a83c8abc77e5d093412d6bbc21dff52d94e3ca
SHA256

39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739
SHA512

91ea0cb2cfb2a28429cce867626098895f12dd60f41c9b88d7b69cb24a2bc7e1899d45654aee29fa4344a584ffeb23cc02118d4b97f52beafc80b7cb2a6516ff
SSDEEP

24576:23eHKTm2k57CY4r3XQ8hxMqhKcMxcqqaxA05THmAQpwjzXdsjfb1WS8bPzIV8nwe:2c5GY4r3TVKcMqa1tGvUsVWS8bPW8wkX

Score

10^/10

asyncrat default discovery rat upx

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

allay.x3322.net:5050

Mutex

gnrfjlujxmukjuvrs

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/356-58-0x0000000000850000-0x0000000000868000-memory.dmp	VenomRAT
behavioral1/memory/1644-75-0x0000000000E70000-0x0000000000E88000-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

356 Client.exe
1644 WriteFile.exe

pid	process
356	Client.exe
1644	WriteFile.exe

UPX packed file 27 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2888-0-0x0000000068CD0000-0x0000000068CDF000-memory.dmp	upx
behavioral1/memory/2888-1-0x0000000000240000-0x000000000024F000-memory.dmp	upx
behavioral1/memory/2888-6-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-31-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-51-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-50-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-47-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-45-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-43-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-41-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-37-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-35-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-33-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-27-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-25-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-23-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-21-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-9-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-8-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-39-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-29-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-19-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-17-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-15-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-13-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-11-0x0000000010000000-0x000000001003C000-memory.dmp	upx
behavioral1/memory/2888-7-0x0000000010000000-0x000000001003C000-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

1776 2888 WerFault.exe 39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe

pid	pid_target	process	target process
1776	2888	WerFault.exe	39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.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:

39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2060 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

548 schtasks.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exeClient.exeWriteFile.exe

pid process

2888 39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe
356 Client.exe
1644 WriteFile.exe
1644 WriteFile.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client.exeWriteFile.exe

description pid process

Token: SeDebugPrivilege 356 Client.exe
Token: SeDebugPrivilege 1644 WriteFile.exe

pid	process
2060	timeout.exe

pid	process
548	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	356	Client.exe
Token: SeDebugPrivilege	1644	WriteFile.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exeWriteFile.exe

pid	process
2888	39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe
2888	39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe
2888	39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe
1644	WriteFile.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exeClient.execmd.execmd.exe

description	pid	process	target process
PID 2888 wrote to memory of 356	2888	39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe	Client.exe
PID 2888 wrote to memory of 356	2888	39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe	Client.exe
PID 2888 wrote to memory of 356	2888	39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe	Client.exe
PID 2888 wrote to memory of 356	2888	39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe	Client.exe
PID 356 wrote to memory of 2352	356	Client.exe	cmd.exe
PID 356 wrote to memory of 2352	356	Client.exe	cmd.exe
PID 356 wrote to memory of 2352	356	Client.exe	cmd.exe
PID 356 wrote to memory of 1984	356	Client.exe	cmd.exe
PID 356 wrote to memory of 1984	356	Client.exe	cmd.exe
PID 356 wrote to memory of 1984	356	Client.exe	cmd.exe
PID 2352 wrote to memory of 548	2352	cmd.exe	schtasks.exe
PID 2352 wrote to memory of 548	2352	cmd.exe	schtasks.exe
PID 2352 wrote to memory of 548	2352	cmd.exe	schtasks.exe
PID 1984 wrote to memory of 2060	1984	cmd.exe	timeout.exe
PID 1984 wrote to memory of 2060	1984	cmd.exe	timeout.exe
PID 1984 wrote to memory of 2060	1984	cmd.exe	timeout.exe
PID 2888 wrote to memory of 1776	2888	39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe	WerFault.exe
PID 2888 wrote to memory of 1776	2888	39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe	WerFault.exe
PID 2888 wrote to memory of 1776	2888	39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe	WerFault.exe
PID 2888 wrote to memory of 1776	2888	39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe	WerFault.exe
PID 1984 wrote to memory of 1644	1984	cmd.exe	WriteFile.exe
PID 1984 wrote to memory of 1644	1984	cmd.exe	WriteFile.exe
PID 1984 wrote to memory of 1644	1984	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\39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe
"C:\Users\Admin\AppData\Local\Temp\39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2888
- C:\Client.exe
  "C:\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:356
- - 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:2352
  - - 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:548
- - C:\Windows\system32\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp1D7F.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1984
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:2060
  - - 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:1644
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2888 -s 876
  2⤵
  - Program crash
  PID:1776

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

Replay Monitor

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Downloads

C:\Client.exe

Filesize
74KB

MD5
b7d579e26b673c6866c448e6af708515

SHA1
ef19b6d6fcd369c8636dc0539dd32589a89f2c09

SHA256
6035245b15f24292d031bb460c6b9a4301ced628f93d37b58771aca3b49aa07a

SHA512
df0ad0004e9e40274bdd4ac586400b096679d456e35b0ac2a2d25c15cff17557428bb38023c8ed38c52e3d7eef962cfd1c3092f82fe5ea2ef1cf0ea442c8741c

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp1D7F.tmp.bat

Filesize
153B

MD5
513173eab691cf4f3b5a83786af359fb

SHA1
38055920ca06db16d9946956cd8b393bad22f48a

SHA256
03d208271e8b2ca5ed9211850afbc68455f2e7d471e4977f6e58e3b7703780c2

SHA512
e942de4684d4974d25462137acb0d3b3c8dc8b36a2df87cde8b7ba8efe5313441676eb35ad1fa02a7c47044bfdf2ffda0c55e55ca357475f9f02d8f8e113a1a0

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

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
memory/356-57-0x000007FEF61A3000-0x000007FEF61A4000-memory.dmp

Filesize
4KB

Download
memory/356-70-0x000007FEF61A0000-0x000007FEF6B8C000-memory.dmp

Filesize
9.9MB

Download
memory/356-69-0x000007FEF61A0000-0x000007FEF6B8C000-memory.dmp

Filesize
9.9MB

Download
memory/356-60-0x000007FEF61A0000-0x000007FEF6B8C000-memory.dmp

Filesize
9.9MB

Download
memory/356-58-0x0000000000850000-0x0000000000868000-memory.dmp

Filesize
96KB

Download
memory/1644-75-0x0000000000E70000-0x0000000000E88000-memory.dmp

Filesize
96KB

Download
memory/2888-9-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-19-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-37-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-35-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-33-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-27-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-25-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-23-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-21-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-0-0x0000000068CD0000-0x0000000068CDF000-memory.dmp

Filesize
60KB

Download
memory/2888-8-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-39-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-29-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-41-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-17-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-15-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-13-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-11-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-7-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-43-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-45-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-47-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-50-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-51-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-31-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-6-0x0000000010000000-0x000000001003C000-memory.dmp

Filesize
240KB

Download
memory/2888-1-0x0000000000240000-0x000000000024F000-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads