asyncrat | 51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a

Resubmissions

13/01/2025, 00:07

250113-aegj6awkdt10

12/01/2025, 09:31

250112-lg7d5syqdk10

12/01/2025, 06:04

250112-gs1zaazlax10

Analysis

max time kernel
891s
max time network
892s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
13/01/2025, 00:07

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General

Target
51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe
Size 1.3MB
Sample250113-aegj6awkdt
SHA256 51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a
MD5 4c71ccf76dccb2c58a85f67cf2fc6206
SHA1 42436168ecfa82313617b91cebf489a11e28f29a
SHA512 24be3ac224544c2a38466604fb285155b1fddc811ee304ac5bfa46abadb925eba44d156c84f94a95b7e95cf28491405f748278ba287b531e24241a07a1cdc752
SSDEEP 24576:VMjhqBd3X3R+wTqM6FWEn72mHvKgcLJj3gSPWbLK3AtIT2Awyfc7MEYb6:MEBdH3dt6gmHdclj3IK3zT27yEbYe
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

v1.2.2

Botnet

Default

192.238.134.73:56003
192.238.134.73:56004
192.238.134.73:56005

Mutex

vjggiafzsllukefmlx

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
behavioral1/memory/2704-67-0x0000000000540000-0x0000000000552000-memory.dmp	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2796	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
2768	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp

Loads dropped DLL 8 IoCs

pid	Process
2608	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe
2796	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
2796	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
2776	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe
2768	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
2768	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
2816	regsvr32.exe
2704	regsvr32.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to execute payload.

execution

PowerShell

T1059.001

pid	Process
2088	powershell.exe
1992	powershell.exe
1992	powershell.exe
2088	powershell.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe
File opened for modification	C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.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 5 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	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe

Suspicious behavior: EnumeratesProcesses 42 IoCs

pid	Process
2768	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
2768	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
1992	powershell.exe
2088	powershell.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe
2704	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1992	powershell.exe
Token: SeDebugPrivilege	2088	powershell.exe
Token: SeDebugPrivilege	2704	regsvr32.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2768	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2704	regsvr32.exe

Suspicious use of WriteProcessMemory 41 IoCs

description	pid	Process	procid_target
PID 2608 wrote to memory of 2796	2608	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	30
PID 2608 wrote to memory of 2796	2608	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	30
PID 2608 wrote to memory of 2796	2608	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	30
PID 2608 wrote to memory of 2796	2608	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	30
PID 2608 wrote to memory of 2796	2608	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	30
PID 2608 wrote to memory of 2796	2608	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	30
PID 2608 wrote to memory of 2796	2608	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	30
PID 2796 wrote to memory of 2776	2796	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	31
PID 2796 wrote to memory of 2776	2796	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	31
PID 2796 wrote to memory of 2776	2796	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	31
PID 2796 wrote to memory of 2776	2796	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	31
PID 2796 wrote to memory of 2776	2796	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	31
PID 2796 wrote to memory of 2776	2796	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	31
PID 2796 wrote to memory of 2776	2796	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	31
PID 2776 wrote to memory of 2768	2776	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	32
PID 2776 wrote to memory of 2768	2776	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	32
PID 2776 wrote to memory of 2768	2776	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	32
PID 2776 wrote to memory of 2768	2776	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	32
PID 2776 wrote to memory of 2768	2776	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	32
PID 2776 wrote to memory of 2768	2776	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	32
PID 2776 wrote to memory of 2768	2776	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	32
PID 2768 wrote to memory of 2816	2768	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	33
PID 2768 wrote to memory of 2816	2768	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	33
PID 2768 wrote to memory of 2816	2768	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	33
PID 2768 wrote to memory of 2816	2768	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	33
PID 2768 wrote to memory of 2816	2768	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	33
PID 2768 wrote to memory of 2816	2768	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	33
PID 2768 wrote to memory of 2816	2768	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	33
PID 2816 wrote to memory of 2704	2816	regsvr32.exe	34
PID 2816 wrote to memory of 2704	2816	regsvr32.exe	34
PID 2816 wrote to memory of 2704	2816	regsvr32.exe	34
PID 2816 wrote to memory of 2704	2816	regsvr32.exe	34
PID 2816 wrote to memory of 2704	2816	regsvr32.exe	34
PID 2816 wrote to memory of 2704	2816	regsvr32.exe	34
PID 2816 wrote to memory of 2704	2816	regsvr32.exe	34
PID 2704 wrote to memory of 1992	2704	regsvr32.exe	35
PID 2704 wrote to memory of 1992	2704	regsvr32.exe	35
PID 2704 wrote to memory of 1992	2704	regsvr32.exe	35
PID 2704 wrote to memory of 2088	2704	regsvr32.exe	37
PID 2704 wrote to memory of 2088	2704	regsvr32.exe	37
PID 2704 wrote to memory of 2088	2704	regsvr32.exe	37

C:\Users\Admin\AppData\Local\Temp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe
C:\Users\Admin\AppData\Local\Temp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe cmd /c %SIGILL% "SIGTERM|DELETE|SIGKILL"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2608
- C:\Users\Admin\AppData\Local\Temp\is-7O21L.tmp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-7O21L.tmp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp" /SL5="$30144,948933,235520,C:\Users\Admin\AppData\Local\Temp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe" cmd /c %SIGILL% "SIGTERM|DELETE|SIGKILL"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2796
- - C:\Users\Admin\AppData\Local\Temp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe
    "C:\Users\Admin\AppData\Local\Temp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe" /VERYSILENT
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2776
  - - C:\Users\Admin\AppData\Local\Temp\is-8G59G.tmp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-8G59G.tmp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp" /SL5="$50150,948933,235520,C:\Users\Admin\AppData\Local\Temp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe" /VERYSILENT
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of FindShellTrayWindow
      Suspicious use of WriteProcessMemory
      PID:2768
    - - C:\Windows\SysWOW64\regsvr32.exe
        
        "regsvr32.exe" /s /i:360 C:\Users\Admin\AppData\Roaming\Setup_Stork.dll
        5⤵
        Loads dropped DLL
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:2816
      - C:\Windows\system32\regsvr32.exe
        
        /s /i:360 C:\Users\Admin\AppData\Roaming\Setup_Stork.dll
        6⤵
        Loads dropped DLL
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:2704
        
        C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/S /i:360 C:\Users\Admin\AppData\Roaming\Setup_Stork.dll' }) { exit 0 } else { exit 1 }"
        7⤵
        Command and Scripting Interpreter: PowerShell
        Drops file in System32 directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1992
        
        C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" "Register-ScheduledTask -Action (New-ScheduledTaskAction -Execute \"regsvr32\" -Argument \"/S /i:360 C:\Users\Admin\AppData\Roaming\Setup_Stork.dll\") -Trigger (New-ScheduledTaskTrigger -Once -At (Get-Date).AddMinutes(1) -RepetitionInterval (New-TimeSpan -Minutes 1)) -TaskName 'MicrosoftEdgeUpdateTaskMachineUA{59F8B634-54CB-4801-E2E8-3DA0AFB56020}' -Description 'MicrosoftEdgeUpdateTaskMachineUA' -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -ExecutionTimeLimit 0) -RunLevel Highest"
        7⤵
        Command and Scripting Interpreter: PowerShell
        Drops file in System32 directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2088

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

590aee7bdd69b59b.customDestinations-ms

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Size 7KB
SHA256 f57756f8592278f1221c78bfe6c05346ed3993d66bf1f745e60e0ffa41066113
MD5 86dbda459bcea6d6f30c31bbbac54051
SHA1 72ea898dd069d087bb4f82548b410ee8f3742ead
SHA512 e960355a04fa576a01182249b1243ca2b6e8e939602a3ba7526953134556f82ede0b7827b0d62034b7ed9ac5c4005767bc63b6e1f169169a46f6163a06b8f75f
SSDEEP 96:0leCV3M8m3nqvsqvJCwoQleCV3M8m3nqvsEHyqvJCworJNIFC3QH8+7Ws3XlUVD:4XuUosXuAHnorJxF+7Woc
MD5 SHA1 SHA512 SSDEEP

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Setup_Stork.dll

Path C:\Users\Admin\AppData\Roaming\Setup_Stork.dll
Size 2.6MB
SHA256 8ae29824b1554e170133fe7fae8b9208526f1ab1b70a6299f5befcc0482db095
MD5 be749ce6cea9df27363dd3a47682344b
SHA1 db9680d1fbaa852212a4693d37d64f412c30a1bc
SHA512 8f423ea8db31aaa723145ba94e00c2c2891ad361ee6e0dc5f8f2fd11f2e7cd72c387157e6d7c759eb9f8b9f227e317775ef71c283687fa8a58779ef70abbbf42
SSDEEP 49152:GIn0oFeRDJVC3iOjKa8RXMDLdfKDuejx+:GkFE2Z7ejx+
MD5 SHA1 SHA512 SSDEEP

Submit Download

51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp

Path \Users\Admin\AppData\Local\Temp\is-7O21L.tmp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
Size 1.2MB
SHA256 55adc6677700e166913c9f26a213d93244242b17331b4f9a606760117b698b65
MD5 bef5bad133138ce27f0c6e73d5a2e5f9
SHA1 1cfc9e170e100fc23073cdfcf590594e18598314
SHA512 f8d3d971a58fdc2d7585c61c70c41d0625b2cbda9698f7a26ed009374d9f4986effc9d69dd1579f38f22bd7e7700d714702df663dfcc195c11b6fc2d0b315f2d
SSDEEP 24576:pYwCLCUplZhgjXj8YcgoniqO3CBiO0jaS+EtjC67V56Bd3X39Nx9Xg:oGUhni7iSFCQ6BdH312
MD5 SHA1 SHA512 SSDEEP

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_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-C52QA.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

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memory/1992-53-0x000000001B840000-0x000000001BB22000-memory.dmp

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memory/1992-54-0x0000000001FF0000-0x0000000001FF8000-memory.dmp

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memory/2088-62-0x0000000001DA0000-0x0000000001DA8000-memory.dmp

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memory/2088-61-0x000000001B690000-0x000000001B972000-memory.dmp

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memory/2608-2-0x0000000000401000-0x0000000000417000-memory.dmp

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memory/2608-24-0x0000000000400000-0x0000000000444000-memory.dmp

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memory/2608-0-0x0000000000400000-0x0000000000444000-memory.dmp

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memory/2704-67-0x0000000000540000-0x0000000000552000-memory.dmp

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memory/2704-66-0x000007FEF7350000-0x000007FEF75DA000-memory.dmp

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memory/2768-43-0x0000000000400000-0x000000000053F000-memory.dmp

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memory/2776-18-0x0000000000400000-0x0000000000444000-memory.dmp

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memory/2776-45-0x0000000000400000-0x0000000000444000-memory.dmp

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memory/2776-21-0x0000000000400000-0x0000000000444000-memory.dmp

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memory/2796-8-0x0000000000400000-0x000000000053F000-memory.dmp

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memory/2796-20-0x0000000000400000-0x000000000053F000-memory.dmp

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