asyncrat | 51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a

Resubmissions

13-01-2025 00:06

250113-ad4cjaylhr 10

12-01-2025 12:30

250112-ppfsyaskhx 10

12-01-2025 09:47

250112-lr9bgszler 10

Analysis

max time kernel
142s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
12-01-2025 09:47

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe
Size

1.3MB
MD5

4c71ccf76dccb2c58a85f67cf2fc6206
SHA1

42436168ecfa82313617b91cebf489a11e28f29a
SHA256

51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a
SHA512

24be3ac224544c2a38466604fb285155b1fddc811ee304ac5bfa46abadb925eba44d156c84f94a95b7e95cf28491405f748278ba287b531e24241a07a1cdc752
SSDEEP

24576:VMjhqBd3X3R+wTqM6FWEn72mHvKgcLJj3gSPWbLK3AtIT2Awyfc7MEYb6:MEBdH3dt6gmHdclj3IK3zT27yEbYe

Score

10^/10

asyncrat venomrat 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

VenomRAT 1 IoCs

Detects VenomRAT.

rat

resource	yara_rule
behavioral2/memory/2316-73-0x0000000002630000-0x0000000002642000-memory.dmp	VenomRAT

Venomrat family
venomrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/2316-73-0x0000000002630000-0x0000000002642000-memory.dmp	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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp

Executes dropped EXE 2 IoCs

pid	Process
3704	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
3648	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp

Loads dropped DLL 5 IoCs

pid	Process
1380	regsvr32.exe
2316	regsvr32.exe
2744	regsvr32.exe
1460	regsvr32.EXE
4536	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
1564	powershell.exe
3180	powershell.exe
1564	powershell.exe
3180	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.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
3648	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
3648	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
1564	powershell.exe
1564	powershell.exe
3180	powershell.exe
3180	powershell.exe
2316	regsvr32.exe
2316	regsvr32.exe
2316	regsvr32.exe
2316	regsvr32.exe
2316	regsvr32.exe
2316	regsvr32.exe
2316	regsvr32.exe
2316	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1564	powershell.exe
Token: SeIncreaseQuotaPrivilege	1564	powershell.exe
Token: SeSecurityPrivilege	1564	powershell.exe
Token: SeTakeOwnershipPrivilege	1564	powershell.exe
Token: SeLoadDriverPrivilege	1564	powershell.exe
Token: SeSystemProfilePrivilege	1564	powershell.exe
Token: SeSystemtimePrivilege	1564	powershell.exe
Token: SeProfSingleProcessPrivilege	1564	powershell.exe
Token: SeIncBasePriorityPrivilege	1564	powershell.exe
Token: SeCreatePagefilePrivilege	1564	powershell.exe
Token: SeBackupPrivilege	1564	powershell.exe
Token: SeRestorePrivilege	1564	powershell.exe
Token: SeShutdownPrivilege	1564	powershell.exe
Token: SeDebugPrivilege	1564	powershell.exe
Token: SeSystemEnvironmentPrivilege	1564	powershell.exe
Token: SeRemoteShutdownPrivilege	1564	powershell.exe
Token: SeUndockPrivilege	1564	powershell.exe
Token: SeManageVolumePrivilege	1564	powershell.exe
Token: 33	1564	powershell.exe
Token: 34	1564	powershell.exe
Token: 35	1564	powershell.exe
Token: 36	1564	powershell.exe
Token: SeDebugPrivilege	3180	powershell.exe
Token: SeIncreaseQuotaPrivilege	3180	powershell.exe
Token: SeSecurityPrivilege	3180	powershell.exe
Token: SeTakeOwnershipPrivilege	3180	powershell.exe
Token: SeLoadDriverPrivilege	3180	powershell.exe
Token: SeSystemProfilePrivilege	3180	powershell.exe
Token: SeSystemtimePrivilege	3180	powershell.exe
Token: SeProfSingleProcessPrivilege	3180	powershell.exe
Token: SeIncBasePriorityPrivilege	3180	powershell.exe
Token: SeCreatePagefilePrivilege	3180	powershell.exe
Token: SeBackupPrivilege	3180	powershell.exe
Token: SeRestorePrivilege	3180	powershell.exe
Token: SeShutdownPrivilege	3180	powershell.exe
Token: SeDebugPrivilege	3180	powershell.exe
Token: SeSystemEnvironmentPrivilege	3180	powershell.exe
Token: SeRemoteShutdownPrivilege	3180	powershell.exe
Token: SeUndockPrivilege	3180	powershell.exe
Token: SeManageVolumePrivilege	3180	powershell.exe
Token: 33	3180	powershell.exe
Token: 34	3180	powershell.exe
Token: 35	3180	powershell.exe
Token: 36	3180	powershell.exe
Token: SeIncreaseQuotaPrivilege	3180	powershell.exe
Token: SeSecurityPrivilege	3180	powershell.exe
Token: SeTakeOwnershipPrivilege	3180	powershell.exe
Token: SeLoadDriverPrivilege	3180	powershell.exe
Token: SeSystemProfilePrivilege	3180	powershell.exe
Token: SeSystemtimePrivilege	3180	powershell.exe
Token: SeProfSingleProcessPrivilege	3180	powershell.exe
Token: SeIncBasePriorityPrivilege	3180	powershell.exe
Token: SeCreatePagefilePrivilege	3180	powershell.exe
Token: SeBackupPrivilege	3180	powershell.exe
Token: SeRestorePrivilege	3180	powershell.exe
Token: SeShutdownPrivilege	3180	powershell.exe
Token: SeDebugPrivilege	3180	powershell.exe
Token: SeSystemEnvironmentPrivilege	3180	powershell.exe
Token: SeRemoteShutdownPrivilege	3180	powershell.exe
Token: SeUndockPrivilege	3180	powershell.exe
Token: SeManageVolumePrivilege	3180	powershell.exe
Token: 33	3180	powershell.exe
Token: 34	3180	powershell.exe
Token: 35	3180	powershell.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3648	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2316	regsvr32.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1560 wrote to memory of 3704	1560	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	82
PID 1560 wrote to memory of 3704	1560	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	82
PID 1560 wrote to memory of 3704	1560	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	82
PID 3704 wrote to memory of 960	3704	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	83
PID 3704 wrote to memory of 960	3704	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	83
PID 3704 wrote to memory of 960	3704	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	83
PID 960 wrote to memory of 3648	960	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	84
PID 960 wrote to memory of 3648	960	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	84
PID 960 wrote to memory of 3648	960	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe	84
PID 3648 wrote to memory of 1380	3648	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	85
PID 3648 wrote to memory of 1380	3648	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	85
PID 3648 wrote to memory of 1380	3648	51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp	85
PID 1380 wrote to memory of 2316	1380	regsvr32.exe	86
PID 1380 wrote to memory of 2316	1380	regsvr32.exe	86
PID 2316 wrote to memory of 1564	2316	regsvr32.exe	87
PID 2316 wrote to memory of 1564	2316	regsvr32.exe	87
PID 2316 wrote to memory of 3180	2316	regsvr32.exe	90
PID 2316 wrote to memory of 3180	2316	regsvr32.exe	90
PID 2316 wrote to memory of 2744	2316	regsvr32.exe	92
PID 2316 wrote to memory of 2744	2316	regsvr32.exe	92

C:\Users\Admin\AppData\Local\Temp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe
"C:\Users\Admin\AppData\Local\Temp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1560
- C:\Users\Admin\AppData\Local\Temp\is-RGGKQ.tmp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-RGGKQ.tmp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp" /SL5="$D01B8,948933,235520,C:\Users\Admin\AppData\Local\Temp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3704
- - C:\Users\Admin\AppData\Local\Temp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe
    "C:\Users\Admin\AppData\Local\Temp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe" /VERYSILENT
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:960
  - - C:\Users\Admin\AppData\Local\Temp\is-GDT26.tmp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-GDT26.tmp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp" /SL5="$A01C0,948933,235520,C:\Users\Admin\AppData\Local\Temp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.exe" /VERYSILENT
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of FindShellTrayWindow
      Suspicious use of WriteProcessMemory
      PID:3648
    - - 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:1380
      - 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 SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:2316
        
        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
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1564
        
        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{06602189-CE02-4BD2-EB81-5F9A15F2EA31}' -Description 'MicrosoftEdgeUpdateTaskMachineUA' -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -ExecutionTimeLimit 0) -RunLevel Highest"
        7⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3180
        
        C:\Windows\system32\regsvr32.exe
        
        "regsvr32" /i:360 /s C:\Users\Admin\AppData\Roaming\Setup_Stork.dll
        7⤵
        Loads dropped DLL
        
        PID:2744

C:\Windows\system32\regsvr32.EXE
C:\Windows\system32\regsvr32.EXE /S /i:360 C:\Users\Admin\AppData\Roaming\Setup_Stork.dll
1⤵
- Loads dropped DLL
PID:1460

C:\Windows\system32\regsvr32.EXE
C:\Windows\system32\regsvr32.EXE /S /i:360 C:\Users\Admin\AppData\Roaming\Setup_Stork.dll
1⤵
- Loads dropped DLL
PID:4536

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

Loading Replay Monitor...

Downloads

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

Filesize
3KB

MD5
661739d384d9dfd807a089721202900b

SHA1
5b2c5d6a7122b4ce849dc98e79a7713038feac55

SHA256
70c3ecbaa6df88e88df4efc70968502955e890a2248269641c4e2d4668ef61bf

SHA512
81b48ae5c4064c4d9597303d913e32d3954954ba1c8123731d503d1653a0d848856812d2ee6951efe06b1db2b91a50e5d54098f60c26f36bc8390203f4c8a2d8

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
12c844ed8342738dacc6eb0072c43257

SHA1
b7f2f9e3ec4aaf5e2996720f129cd64887ac91d7

SHA256
2afeb7db4e46d3c1524512a73448e9cd0121deec761d8aa54fa9fe8b56df7519

SHA512
e3de9103533a69cccc36cd377297ba3ec9bd7a1159e1349d2cc01ab66a88a5a82b4ee3af61fab586a0cdfab915c7408735439fd0462c5c2cc2c787cb0765766a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dmr3qyjk.blx.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-324SM.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-RGGKQ.tmp\51c0cfc7539dc3bb883969d384a7389373a144f65ce6d1b5ec39bff2f616510a.tmp

Filesize
1.2MB

MD5
bef5bad133138ce27f0c6e73d5a2e5f9

SHA1
1cfc9e170e100fc23073cdfcf590594e18598314

SHA256
55adc6677700e166913c9f26a213d93244242b17331b4f9a606760117b698b65

SHA512
f8d3d971a58fdc2d7585c61c70c41d0625b2cbda9698f7a26ed009374d9f4986effc9d69dd1579f38f22bd7e7700d714702df663dfcc195c11b6fc2d0b315f2d

Download Submit
C:\Users\Admin\AppData\Roaming\Setup_Stork.dll

Filesize
2.6MB

MD5
be749ce6cea9df27363dd3a47682344b

SHA1
db9680d1fbaa852212a4693d37d64f412c30a1bc

SHA256
8ae29824b1554e170133fe7fae8b9208526f1ab1b70a6299f5befcc0482db095

SHA512
8f423ea8db31aaa723145ba94e00c2c2891ad361ee6e0dc5f8f2fd11f2e7cd72c387157e6d7c759eb9f8b9f227e317775ef71c283687fa8a58779ef70abbbf42

Download Submit
memory/960-41-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/960-16-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/960-14-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/1560-20-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/1560-0-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/1560-2-0x0000000000401000-0x0000000000417000-memory.dmp

Filesize
88KB

Download
memory/1564-43-0x000001D2FE380000-0x000001D2FE3A2000-memory.dmp

Filesize
136KB

Download
memory/2316-72-0x00007FFD76BF0000-0x00007FFD76E7A000-memory.dmp

Filesize
2.5MB

Download
memory/2316-73-0x0000000002630000-0x0000000002642000-memory.dmp

Filesize
72KB

Download
memory/3648-24-0x0000000000400000-0x000000000053F000-memory.dmp

Filesize
1.2MB

Download
memory/3648-38-0x0000000000400000-0x000000000053F000-memory.dmp

Filesize
1.2MB

Download
memory/3704-18-0x0000000000400000-0x000000000053F000-memory.dmp

Filesize
1.2MB

Download
memory/3704-7-0x0000000000400000-0x000000000053F000-memory.dmp

Filesize
1.2MB

Download