asyncrat | 558909412427b05911a02cddfe00fc5e9d30bc38e1ba636d04aa7efb63438ec8

General

Target

Project Buu.rar
Size

30KB
MD5

92873d2f99e985d47885123508f96de8
SHA1

622e60c7bc942e6a003a7131c35cfe6ccff6d683
SHA256

558909412427b05911a02cddfe00fc5e9d30bc38e1ba636d04aa7efb63438ec8
SHA512

81f0f373c89af6599c511c4e5b5446353bf6b71ce34bb1e6c13d4b3c842e889b505484689c4e800c05dadbf20c54b6d9d5653bf41ae58b6b380b354b1e278dfe
SSDEEP

768:JbQLvR3dqVDOkV406ur3n2N/MCiII7F+2H4:JbQLBnd0xL2vIQb

Score

10^/10

asyncrat default evasion rat trojan

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

79.110.49.58:3232

Attributes

delay
1
install
true
install_file
Windows Security .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

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

Processes:

Windows Security .exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	Windows Security .exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	Windows Security .exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	Windows Security .exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	Windows Security .exe

UAC bypass 3 TTPs 3 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

Windows Security .exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\consentpromptbehavioradmin = "0"	Windows Security .exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\enablelua = "0"	Windows Security .exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\promptonsecuredesktop = "0"	Windows Security .exe

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\7zO048E1EE6\Dependencies.exe	family_asyncrat

Executes dropped EXE 2 IoCs

Processes:

Dependencies.exeWindows Security .exe

pid process

804 Dependencies.exe
2756 Windows Security .exe
Windows security modification 2 TTPs 1 IoCs
evasion trojan

Disable or Modify Tools
T1562.001

Modify Registry
T1112

Processes:

Windows Security .exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Features Windows Security .exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Features	Windows Security .exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

Windows Security .exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\enablelua	Windows Security .exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\enablelua = "0"	Windows Security .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

Processes:

timeout.exe

pid process

2916 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

2768 schtasks.exe

pid	process
2916	timeout.exe

pid	process
2768	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

Dependencies.exe7zFM.exeWindows Security .exe

pid	process
804	Dependencies.exe
804	Dependencies.exe
804	Dependencies.exe
804	Dependencies.exe
804	Dependencies.exe
2112	7zFM.exe
2112	7zFM.exe
2112	7zFM.exe
2112	7zFM.exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe
2756	Windows Security .exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

7zFM.exe

pid process

2112 7zFM.exe

pid	process
2112	7zFM.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

Processes:

7zFM.exeDependencies.exeWindows Security .exepowershell.exepowershell.exe

description	pid	process
Token: SeRestorePrivilege	2112	7zFM.exe
Token: 35	2112	7zFM.exe
Token: SeSecurityPrivilege	2112	7zFM.exe
Token: SeDebugPrivilege	804	Dependencies.exe
Token: SeDebugPrivilege	2756	Windows Security .exe
Token: SeDebugPrivilege	1808	powershell.exe
Token: SeDebugPrivilege	2516	powershell.exe

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

7zFM.exe

pid process

2112 7zFM.exe
2112 7zFM.exe

pid	process
2112	7zFM.exe
2112	7zFM.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

7zFM.exeDependencies.execmd.execmd.exeWindows Security .exe

description	pid	process	target process
PID 2112 wrote to memory of 804	2112	7zFM.exe	Dependencies.exe
PID 2112 wrote to memory of 804	2112	7zFM.exe	Dependencies.exe
PID 2112 wrote to memory of 804	2112	7zFM.exe	Dependencies.exe
PID 804 wrote to memory of 2176	804	Dependencies.exe	cmd.exe
PID 804 wrote to memory of 2176	804	Dependencies.exe	cmd.exe
PID 804 wrote to memory of 2176	804	Dependencies.exe	cmd.exe
PID 804 wrote to memory of 2924	804	Dependencies.exe	cmd.exe
PID 804 wrote to memory of 2924	804	Dependencies.exe	cmd.exe
PID 804 wrote to memory of 2924	804	Dependencies.exe	cmd.exe
PID 2176 wrote to memory of 2768	2176	cmd.exe	schtasks.exe
PID 2176 wrote to memory of 2768	2176	cmd.exe	schtasks.exe
PID 2176 wrote to memory of 2768	2176	cmd.exe	schtasks.exe
PID 2924 wrote to memory of 2916	2924	cmd.exe	timeout.exe
PID 2924 wrote to memory of 2916	2924	cmd.exe	timeout.exe
PID 2924 wrote to memory of 2916	2924	cmd.exe	timeout.exe
PID 2924 wrote to memory of 2756	2924	cmd.exe	Windows Security .exe
PID 2924 wrote to memory of 2756	2924	cmd.exe	Windows Security .exe
PID 2924 wrote to memory of 2756	2924	cmd.exe	Windows Security .exe
PID 2756 wrote to memory of 1808	2756	Windows Security .exe	powershell.exe
PID 2756 wrote to memory of 1808	2756	Windows Security .exe	powershell.exe
PID 2756 wrote to memory of 1808	2756	Windows Security .exe	powershell.exe
PID 2756 wrote to memory of 2516	2756	Windows Security .exe	powershell.exe
PID 2756 wrote to memory of 2516	2756	Windows Security .exe	powershell.exe
PID 2756 wrote to memory of 2516	2756	Windows Security .exe	powershell.exe

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

T1112

Processes:

Windows Security .exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\consentpromptbehavioradmin = "0"	Windows Security .exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\enablelua = "0"	Windows Security .exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\promptonsecuredesktop = "0"	Windows Security .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:\Program Files\7-Zip\7zFM.exe
"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\Project Buu.rar"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:2112
- C:\Users\Admin\AppData\Local\Temp\7zO048E1EE6\Dependencies.exe
  "C:\Users\Admin\AppData\Local\Temp\7zO048E1EE6\Dependencies.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:804
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows Security " /tr '"C:\Users\Admin\AppData\Roaming\Windows Security .exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2176
  - - C:\Windows\system32\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "Windows Security " /tr '"C:\Users\Admin\AppData\Roaming\Windows Security .exe"'
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2768
- - C:\Windows\system32\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpF8A1.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2924
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:2916
  - - C:\Users\Admin\AppData\Roaming\Windows Security .exe
      "C:\Users\Admin\AppData\Roaming\Windows Security .exe"
      4⤵
      Modifies Windows Defender Real-time Protection settings
      UAC bypass
      Executes dropped EXE
      Windows security modification
      Checks whether UAC is enabled
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      System policy modification
      PID:2756
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" Get-MpPreference -verbose
        5⤵
        Suspicious use of AdjustPrivilegeToken
        
        PID:1808
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add - MpPreference - ExclusionExtension ".exe"
        5⤵
        Suspicious use of AdjustPrivilegeToken
        
        PID:2516

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

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

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Impair Defenses

3

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\7zO048E1EE6\Dependencies.exe

Filesize
63KB

MD5
97be07e4d8fa640d71aa049385d8bcc2

SHA1
cd21b0a98183abe177ce6b1a857f9b4166100b4d

SHA256
df4e19980ecdf58f0a6562bad1e4929e30e21f4b3633f9f33ad4b86a5406ee31

SHA512
23e6b9ea22b2dead07d5b6baf076afcf747e8ba02df9afbc81ca3011f91035cf6d385c5a9dd5ae63fe6f95010ab928379baf4d55cbb04c4bbdcf246689e52cd4

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabD4C.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar264B.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpF8A1.tmp.bat

Filesize
161B

MD5
60ca2ed7ce0b0a88973a94f61b055620

SHA1
30436cb81e7f8238727fe80c89aa279af748f485

SHA256
a78a4c5508cde4f171faed2f52d457fb91fb5b60ad2b85da307e26b360f991c2

SHA512
59561f03d6914d373e5794d95f268b3801df762be5b4c51569cc246fe2436e3f1d5b6141c98beb6d6ed6ca0a54bffc5c6b46a892c09d3321e73b3b947962cf1b

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
f11dd5825341ef2ed2e81f804feaff91

SHA1
3ceeb82ffab51ca00b8e24566960b43557229d73

SHA256
2c21edd77f6f0a35262691a9febef07bb50d85d536eaf8efad03983b0929f3e9

SHA512
ab51ca208023db50813a94d24c25e7ba7e03a4c8be2ad41faf62cdeb54d9753510bb4337b13dedd9e55b3cce12a911aee1d8c2cf8696a3784e03c8801988e559

Download Submit
memory/804-11-0x0000000000DC0000-0x0000000000DD6000-memory.dmp

Filesize
88KB

Download
memory/1808-64-0x000000001B5E0000-0x000000001B8C2000-memory.dmp

Filesize
2.9MB

Download
memory/1808-65-0x0000000001E20000-0x0000000001E28000-memory.dmp

Filesize
32KB

Download
memory/2516-71-0x000000001B610000-0x000000001B8F2000-memory.dmp

Filesize
2.9MB

Download
memory/2516-72-0x0000000001F00000-0x0000000001F08000-memory.dmp

Filesize
32KB

Download
memory/2756-41-0x0000000000560000-0x0000000000594000-memory.dmp

Filesize
208KB

Download
memory/2756-24-0x0000000000820000-0x0000000000836000-memory.dmp

Filesize
88KB

Download
memory/2756-73-0x000000001A7A0000-0x000000001A7D4000-memory.dmp

Filesize
208KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads