asyncrat | c0885fb20ec6822ecf51e73751f0192f09f0e747ca20f9b75458222bc4c685e5

General

Target

Rb (1).exe
Size

8.0MB
MD5

ae4ff56ceb6716a8f9338e084f7701d4
SHA1

4cabe539d621d59f41a481ffac48a8cf8592c14d
SHA256

c0885fb20ec6822ecf51e73751f0192f09f0e747ca20f9b75458222bc4c685e5
SHA512

72fee97a9af3d94699af86d85401fc1d2be5b4310661f0860ae78fecc00d8da0aa76554785ec64678d3e98f5040a888f1e7324f11cb7c1c966a6b698d3394838
SSDEEP

1536:M9RvNeRcklHCFmD3IWvPdb1SzXWTkDxaaDE3Zx7FkhDpqFUUQDS+0basrdVsQDQ:cRvi/NIWvPdb2XoJZZmhDpl/uaWdVsv

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

qa.riu.one:1420

Mutex

sVDhayko8Fn8

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2940 set thread context of 4448	2940	Rb (1).exe	87

System Location Discovery: System Language Discovery 1 TTPs 8 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	Rb (1).exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.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
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	timeout.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4016	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

pid	Process
4444	schtasks.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2940	Rb (1).exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4448	vbc.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2940 wrote to memory of 4448	2940	Rb (1).exe	87
PID 2940 wrote to memory of 4448	2940	Rb (1).exe	87
PID 2940 wrote to memory of 4448	2940	Rb (1).exe	87
PID 2940 wrote to memory of 4448	2940	Rb (1).exe	87
PID 2940 wrote to memory of 4448	2940	Rb (1).exe	87
PID 2940 wrote to memory of 4448	2940	Rb (1).exe	87
PID 2940 wrote to memory of 4448	2940	Rb (1).exe	87
PID 2940 wrote to memory of 4448	2940	Rb (1).exe	87
PID 2940 wrote to memory of 4976	2940	Rb (1).exe	88
PID 2940 wrote to memory of 4976	2940	Rb (1).exe	88
PID 2940 wrote to memory of 4976	2940	Rb (1).exe	88
PID 2940 wrote to memory of 3220	2940	Rb (1).exe	90
PID 2940 wrote to memory of 3220	2940	Rb (1).exe	90
PID 2940 wrote to memory of 3220	2940	Rb (1).exe	90
PID 3220 wrote to memory of 4444	3220	cmd.exe	92
PID 3220 wrote to memory of 4444	3220	cmd.exe	92
PID 3220 wrote to memory of 4444	3220	cmd.exe	92
PID 2940 wrote to memory of 2968	2940	Rb (1).exe	93
PID 2940 wrote to memory of 2968	2940	Rb (1).exe	93
PID 2940 wrote to memory of 2968	2940	Rb (1).exe	93
PID 4448 wrote to memory of 4188	4448	vbc.exe	113
PID 4448 wrote to memory of 4188	4448	vbc.exe	113
PID 4448 wrote to memory of 4188	4448	vbc.exe	113
PID 4188 wrote to memory of 4016	4188	cmd.exe	115
PID 4188 wrote to memory of 4016	4188	cmd.exe	115
PID 4188 wrote to memory of 4016	4188	cmd.exe	115

C:\Users\Admin\AppData\Local\Temp\Rb (1).exe
"C:\Users\Admin\AppData\Local\Temp\Rb (1).exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:2940
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4448
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7E6D.tmp.bat""
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4188
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:4016
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Local\Temp\svc"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4976
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\svc\svc.exe'" /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3220
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\svc\svc.exe'" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4444
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C copy "C:\Users\Admin\AppData\Local\Temp\Rb (1).exe" "C:\Users\Admin\AppData\Local\Temp\svc\svc.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2968

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

Scripting

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

Scripting

1

T1064

Credential Access

Discovery

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\Temp\tmp7E6D.tmp.bat

Filesize
167B

MD5
121f94dce62133ece3e182cb017138f8

SHA1
0b76a74f0130ae0bd7320d6be67a69e2bb6bb160

SHA256
2402f7f5bfe72bd11bfc2df0f18d14010baab849fe7bec427cc1dc83d7757856

SHA512
8748b8a582c9d8c717503200d17586aad1dba7973b73e629b338bd7d40cec6c017d3fac8dd472d2f4dc515a14e8c7db000225ce32f27a434dfb84d7261b869fa

Download Submit
memory/2940-7-0x00000000750A0000-0x0000000075850000-memory.dmp

Filesize
7.7MB

Download
memory/2940-1-0x0000000000420000-0x000000000044E000-memory.dmp

Filesize
184KB

Download
memory/2940-2-0x00000000053D0000-0x0000000005974000-memory.dmp

Filesize
5.6MB

Download
memory/2940-3-0x00000000750A0000-0x0000000075850000-memory.dmp

Filesize
7.7MB

Download
memory/2940-0-0x00000000750AE000-0x00000000750AF000-memory.dmp

Filesize
4KB

Download
memory/4448-11-0x0000000006180000-0x000000000621C000-memory.dmp

Filesize
624KB

Download
memory/4448-8-0x00000000750A0000-0x0000000075850000-memory.dmp

Filesize
7.7MB

Download
memory/4448-5-0x00000000750A0000-0x0000000075850000-memory.dmp

Filesize
7.7MB

Download
memory/4448-12-0x0000000006290000-0x00000000062F6000-memory.dmp

Filesize
408KB

Download
memory/4448-13-0x00000000750A0000-0x0000000075850000-memory.dmp

Filesize
7.7MB

Download
memory/4448-14-0x00000000750A0000-0x0000000075850000-memory.dmp

Filesize
7.7MB

Download
memory/4448-15-0x0000000006F00000-0x0000000006F76000-memory.dmp

Filesize
472KB

Download
memory/4448-16-0x0000000006E80000-0x0000000006EE8000-memory.dmp

Filesize
416KB

Download
memory/4448-17-0x0000000007140000-0x000000000715E000-memory.dmp

Filesize
120KB

Download
memory/4448-18-0x0000000007450000-0x00000000074E2000-memory.dmp

Filesize
584KB

Download
memory/4448-19-0x00000000078D0000-0x0000000007934000-memory.dmp

Filesize
400KB

Download
memory/4448-4-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4448-24-0x00000000750A0000-0x0000000075850000-memory.dmp

Filesize
7.7MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads