asyncrat | 8fe639c3cbdcb49a5246f85ce136f14c8c0ad5150c6e38b5eb66eced9d4c4329

General

Target

Nova.rar
Size

2.1MB
MD5

50ee1cf21948c6015354e9c1a94ca5db
SHA1

f2f6fb19a2db75d2d5515fd3a20c66eb8f3e6d42
SHA256

8fe639c3cbdcb49a5246f85ce136f14c8c0ad5150c6e38b5eb66eced9d4c4329
SHA512

46c8a6e2818972ec363b5905838e05828a87b10c7991ae5124c485ccf625da0cff4985d675bbda08a9eccf1fc1027c5db0a22f8e99c732f7593f66c68f3654dc
SSDEEP

49152:OWYU2F4Tu9YiDuTnlvraYTi04JIBv1WteMcP+1HFFNFwAAnv4qy+d:ZYLCiDuDluYe0cUwp31bN1Aj

Score

10^/10

asyncrat default evasion execution rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

193.161.193.99:53757

Mutex

hsaurcrgqwhjimnkbht

Attributes

delay
1
install
true
install_file
Load.exe
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
behavioral1/files/0x000200000004346c-28.dat	family_asyncrat

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2184	powershell.exe

Stops running service(s) 4 TTPs
evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1669812756-2240353048-2660728061-1000\Control Panel\International\Geo\Nation	Loader.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1669812756-2240353048-2660728061-1000\Control Panel\International\Geo\Nation	Load.exe

Executes dropped EXE 4 IoCs

pid	Process
2916	Loader.exe
2836	Loader.exe
3364	Load.exe
5020	Load.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\MRT.exe	Loader.exe

Launches sc.exe 2 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
3108	sc.exe
768	sc.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
388	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
1308	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
3364	Load.exe
3364	Load.exe
3364	Load.exe
3364	Load.exe
3364	Load.exe
3364	Load.exe
3364	Load.exe
3364	Load.exe
3364	Load.exe
3364	Load.exe
3364	Load.exe
3364	Load.exe
3364	Load.exe
3364	Load.exe
3364	Load.exe
3364	Load.exe
3364	Load.exe
5020	Load.exe
5020	Load.exe
5020	Load.exe
2836	Loader.exe
2184	powershell.exe
2184	powershell.exe
2836	Loader.exe
2836	Loader.exe
2836	Loader.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3120	7zFM.exe

Suspicious use of AdjustPrivilegeToken 29 IoCs

description	pid	Process
Token: SeRestorePrivilege	3120	7zFM.exe
Token: 35	3120	7zFM.exe
Token: SeSecurityPrivilege	3120	7zFM.exe
Token: SeSecurityPrivilege	3120	7zFM.exe
Token: SeSecurityPrivilege	3120	7zFM.exe
Token: SeDebugPrivilege	3364	Load.exe
Token: SeDebugPrivilege	5020	Load.exe
Token: SeDebugPrivilege	2184	powershell.exe
Token: SeIncreaseQuotaPrivilege	2184	powershell.exe
Token: SeSecurityPrivilege	2184	powershell.exe
Token: SeTakeOwnershipPrivilege	2184	powershell.exe
Token: SeLoadDriverPrivilege	2184	powershell.exe
Token: SeSystemProfilePrivilege	2184	powershell.exe
Token: SeSystemtimePrivilege	2184	powershell.exe
Token: SeProfSingleProcessPrivilege	2184	powershell.exe
Token: SeIncBasePriorityPrivilege	2184	powershell.exe
Token: SeCreatePagefilePrivilege	2184	powershell.exe
Token: SeBackupPrivilege	2184	powershell.exe
Token: SeRestorePrivilege	2184	powershell.exe
Token: SeShutdownPrivilege	2184	powershell.exe
Token: SeDebugPrivilege	2184	powershell.exe
Token: SeSystemEnvironmentPrivilege	2184	powershell.exe
Token: SeRemoteShutdownPrivilege	2184	powershell.exe
Token: SeUndockPrivilege	2184	powershell.exe
Token: SeManageVolumePrivilege	2184	powershell.exe
Token: 33	2184	powershell.exe
Token: 34	2184	powershell.exe
Token: 35	2184	powershell.exe
Token: 36	2184	powershell.exe

Suspicious use of FindShellTrayWindow 5 IoCs

pid	Process
3120	7zFM.exe
3120	7zFM.exe
3120	7zFM.exe
3120	7zFM.exe
3120	7zFM.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5020	Load.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2916 wrote to memory of 2836	2916	Loader.exe	98
PID 2916 wrote to memory of 2836	2916	Loader.exe	98
PID 2916 wrote to memory of 3364	2916	Loader.exe	99
PID 2916 wrote to memory of 3364	2916	Loader.exe	99
PID 3364 wrote to memory of 2460	3364	Load.exe	100
PID 3364 wrote to memory of 2460	3364	Load.exe	100
PID 3364 wrote to memory of 4484	3364	Load.exe	102
PID 3364 wrote to memory of 4484	3364	Load.exe	102
PID 4484 wrote to memory of 388	4484	cmd.exe	104
PID 4484 wrote to memory of 388	4484	cmd.exe	104
PID 2460 wrote to memory of 1308	2460	cmd.exe	105
PID 2460 wrote to memory of 1308	2460	cmd.exe	105
PID 4484 wrote to memory of 5020	4484	cmd.exe	106
PID 4484 wrote to memory of 5020	4484	cmd.exe	106
PID 2892 wrote to memory of 2092	2892	cmd.exe	115
PID 2892 wrote to memory of 2092	2892	cmd.exe	115

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:\Program Files\7-Zip\7zFM.exe
"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\Nova.rar"
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:3120

C:\Users\Admin\Desktop\Loader.exe
"C:\Users\Admin\Desktop\Loader.exe"
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2916
- C:\Users\Admin\AppData\Local\Temp\Loader.exe
  "C:\Users\Admin\AppData\Local\Temp\Loader.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  PID:2836
- - C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
    C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe Add-MpPreference -ExclusionPath @($env:UserProfile, $env:ProgramData) -ExclusionExtension '.exe' -Force
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2184
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c wusa /uninstall /kb:890830 /quiet /norestart
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2892
  - - C:\Windows\system32\wusa.exe
      wusa /uninstall /kb:890830 /quiet /norestart
      4⤵
      PID:2092
- - C:\Windows\system32\sc.exe
    C:\Windows\system32\sc.exe stop UsoSvc
    3⤵
    - Launches sc.exe
    PID:3108
- - C:\Windows\system32\sc.exe
    C:\Windows\system32\sc.exe stop WaaSMedicSvc
    3⤵
    - Launches sc.exe
    PID:768
- C:\Users\Admin\AppData\Local\Temp\Load.exe
  "C:\Users\Admin\AppData\Local\Temp\Load.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3364
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Load" /tr '"C:\Users\Admin\AppData\Roaming\Load.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2460
  - - C:\Windows\system32\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "Load" /tr '"C:\Users\Admin\AppData\Roaming\Load.exe"'
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1308
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA2A4.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4484
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:388
  - - C:\Users\Admin\AppData\Roaming\Load.exe
      "C:\Users\Admin\AppData\Roaming\Load.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:5020

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Impair Defenses

1

T1562

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

1

T1489

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Load.exe.log

Filesize
1KB

MD5
b08c36ce99a5ed11891ef6fc6d8647e9

SHA1
db95af417857221948eb1882e60f98ab2914bf1d

SHA256
cc9248a177495f45ec70b86c34fc5746c56730af36ace98ac7eb365dbafda674

SHA512
07e62581eace395b0a9699d727761648103180c21155d84ea09140f9e1c9690705c419118545aa67a564334bbde32710225fe3aa92b0b4b4210cb91f0058b1ea

Download Submit
C:\Users\Admin\AppData\Local\Temp\Load.exe

Filesize
74KB

MD5
4fc5086bcb8939429aea99f7322e619b

SHA1
8d3bd7d005710a8ae0bd0143d18b437be20018d7

SHA256
e31d6dc4d6f89573321f389c5b3f12838545ff8d2f1380cfba1782d39853e9fd

SHA512
04e230f5b39356aecf4732ac9a2f4fea96e51018907e2f22c7e3f22e51188b64cdb3e202fe324f5e3500761fae43f898bf9489aa8faa34eff3566e1119a786d2

Download Submit
C:\Users\Admin\AppData\Local\Temp\Loader.exe

Filesize
2.5MB

MD5
35c54b6a9227ccb7149698254dc8dd52

SHA1
33433b0716128f7c887d7929ec50fab495e45f38

SHA256
db7744a5e7567b151e15c6159b03eb71974233db90716b38d7bb726fd61798e4

SHA512
492de363f0252005a303b7b169721f8536d131bbca71ef37bae59b4b17427dda869c14eea72fd3ed69efc0a3b19b9c3b18e7d6ada1721fbf9b0ce3bfaa57cc12

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ywm50v4l.kl2.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpA2A4.tmp.bat

Filesize
148B

MD5
5f1a28ea5275c8718d8decc60430dd6f

SHA1
fed09f170ba70ffd55bff53b4c6351988e650d24

SHA256
2b9ccb07362835b0633f524f776b9ac41da0e1d876854d80c3471506a6392ea4

SHA512
46bb8d222d76c9a6eae6de48e31e0593a72c32a92c22e86719a68d38285dbf6a8b025ff8e702fd2dfa39c4cd462a3fa46f5e75c7478643cfb9e8ea2d375bf756

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

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
C:\Users\Admin\Desktop\Loader.exe

Filesize
2.1MB

MD5
a07c79f9e2dd72f3b884928ee384344e

SHA1
88df6b54a3e53a501b09b32de2def406820879fa

SHA256
35c4d936db755868a37561663cd4b279b338413db5f89c2f9df71d74a6d35b61

SHA512
cdb6957a1e59b053fdd8f0d43d9b1ba575da2140c5d2c547b87e8a5b1199f2d071f66152ade3cfdb5294903cf42f395a948b28ea87aef9d9aa6eacdeaffdd1fd

Download Submit
memory/2184-54-0x000001E0553A0000-0x000001E0553C2000-memory.dmp

Filesize
136KB

Download
memory/2916-10-0x00007FFE608E0000-0x00007FFE613A2000-memory.dmp

Filesize
10.8MB

Download
memory/2916-40-0x00007FFE608E0000-0x00007FFE613A2000-memory.dmp

Filesize
10.8MB

Download
memory/2916-8-0x0000000000B60000-0x0000000000D7A000-memory.dmp

Filesize
2.1MB

Download
memory/2916-7-0x00007FFE608E3000-0x00007FFE608E5000-memory.dmp

Filesize
8KB

Download
memory/3364-39-0x0000000000FD0000-0x0000000000FE8000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads