asyncrat | 6df84349f4d67f3d0f90ef741cb2626321e429eecdf630aca67a000dc8bca71f

General

Target

Monotone.exe
Size

246KB
MD5

cbb85438bd2ca32cd7ad4c7a4656f791
SHA1

3c67296747df6812205c3d447de8c841ffc84551
SHA256

6df84349f4d67f3d0f90ef741cb2626321e429eecdf630aca67a000dc8bca71f
SHA512

3678bb96f7ef649fb7129e30334667ef7162e54e516b7a3ba6a97b7603ffb7bc65ab0dd43467c2fd17edbd02b97dba545aa152eefe2585b96f32fab62a51ad7d
SSDEEP

6144:+5oaqJhJMHW69B9VjMdxPedN9ug0/9TB0dHlx7PMVeaesVbsDji:+5oaqjp/9TudHlxhds6Dji

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

46.197.123.202:1604

Mutex

bfztpmtzls

Attributes

delay
1
install
false
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
behavioral2/files/0x000a000000023b7e-19.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	Monotone.exe

Executes dropped EXE 2 IoCs

pid	Process
1196	Monotone.exe
4580	Client.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 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Monotone.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
976	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
976	PING.EXE

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4580	Client.exe
4580	Client.exe
4580	Client.exe
4580	Client.exe
4580	Client.exe
4580	Client.exe
4580	Client.exe
4580	Client.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4580	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4580	Client.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4956 wrote to memory of 1196	4956	Monotone.exe	82
PID 4956 wrote to memory of 1196	4956	Monotone.exe	82
PID 4956 wrote to memory of 4580	4956	Monotone.exe	84
PID 4956 wrote to memory of 4580	4956	Monotone.exe	84
PID 1196 wrote to memory of 3912	1196	Monotone.exe	85
PID 1196 wrote to memory of 3912	1196	Monotone.exe	85
PID 3912 wrote to memory of 1120	3912	cmd.exe	86
PID 3912 wrote to memory of 1120	3912	cmd.exe	86
PID 3912 wrote to memory of 976	3912	cmd.exe	87
PID 3912 wrote to memory of 976	3912	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\Monotone.exe
"C:\Users\Admin\AppData\Local\Temp\Monotone.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4956
- C:\Users\Admin\AppData\Roaming\Monotone.exe
  "C:\Users\Admin\AppData\Roaming\Monotone.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:1196
- - C:\Windows\system32\cmd.exe
    "C:\Windows\system32\cmd" /c "C:\Users\Admin\AppData\Local\Temp\8A3E.tmp\8A3F.tmp\8A40.bat C:\Users\Admin\AppData\Roaming\Monotone.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3912
  - - C:\Windows\system32\mode.com
      mode 80,20
      4⤵
      PID:1120
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:976
- C:\Users\Admin\AppData\Roaming\Client.exe
  "C:\Users\Admin\AppData\Roaming\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:4580

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\8A3E.tmp\8A3F.tmp\8A40.bat

Filesize
17KB

MD5
c5b9f5f77bee19857e4331300d080e3b

SHA1
50f5d39311cf12636d9ebe58aa4464578995f112

SHA256
a689ce9bdcdbc32ad39cbab6349453847a71a386cb4c4be4ffe2daff57fce52d

SHA512
ecb86677eb5bb0c0dc8b7c1d351cd7409772699393ebce902fcaa05442d46da112cfe8ca2215794ae2308c573d56fd51fd8920c488ff20c7b1c96cd7fced1dd1

Download Submit
C:\Users\Admin\AppData\Roaming\Client.exe

Filesize
74KB

MD5
4b16a452ee0c842e3c32bf359a9cade3

SHA1
b30626f1369c0409161d23cfc36c499a2cbd54a7

SHA256
806a3c8ee4abc3a8bf4d9693ffb322c6364e43ae8f7ad759149ba55c3f6a8851

SHA512
6c4e9d51be47606966adcbbd558cfdcd43554b47c5267ffcf0cc4220a6a85d653881bcf1dc53ee7e5f14b5735aa5e974d383243defca02a2baefd375c6813d46

Download Submit
C:\Users\Admin\AppData\Roaming\Monotone.exe

Filesize
160KB

MD5
cd6cddac2686df01814705f21e6da343

SHA1
f29ad4efdc160ffba5cb63e01349ec9b84123e30

SHA256
0f7f86530b7fa2e693a2a3a5bf69957e61c2f45d39418d077285a1ea6f4bb992

SHA512
a673d521f316d3e0fa87a99effa33c5dc4fde315e72b7f6cbb828a94ffe8ebeed4bf9ca6fe858b3c69327aa4ce05ae02b37e2a392abb7cc728c4bbe2ab9a6de4

Download Submit
memory/4580-22-0x00007FFEC6143000-0x00007FFEC6145000-memory.dmp

Filesize
8KB

Download
memory/4580-23-0x00000000000A0000-0x00000000000B8000-memory.dmp

Filesize
96KB

Download
memory/4580-29-0x00007FFEC6140000-0x00007FFEC6C01000-memory.dmp

Filesize
10.8MB

Download
memory/4580-30-0x00007FFEC6143000-0x00007FFEC6145000-memory.dmp

Filesize
8KB

Download
memory/4580-31-0x00007FFEC6140000-0x00007FFEC6C01000-memory.dmp

Filesize
10.8MB

Download
memory/4956-0-0x0000000074A62000-0x0000000074A63000-memory.dmp

Filesize
4KB

Download
memory/4956-1-0x0000000074A60000-0x0000000075011000-memory.dmp

Filesize
5.7MB

Download
memory/4956-2-0x0000000074A60000-0x0000000075011000-memory.dmp

Filesize
5.7MB

Download
memory/4956-25-0x0000000074A60000-0x0000000075011000-memory.dmp

Filesize
5.7MB

Download

Analysis

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