asyncrat | c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-01-2025 02:47

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General

Target

c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.exe
Size

811KB
MD5

e3ae2dc9b8b0582a266871b52e85c36f
SHA1

f783d1d0354bf3ad1dc4e506e4df3250a89ee765
SHA256

c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d
SHA512

c670e3d4bd63e054ca9d70ff1588e1c263cf73ca24f1be6f9cde9222e6c351b87e9c2855b42c50f5b92eea7e683ec62b67a2e7c2a0dae1a29e080113435ad438
SSDEEP

24576:qMjhsJkMwFz7D6h0lgoyM3VcH17lpMbTuIGVaiM2a:5zZFDaoIpMHGVa52a

Score

10^/10

asyncrat default discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

v1.2.2

Botnet

Default

38.49.56.2:56003

38.49.56.2:56004

38.49.56.2:56005

Mutex

gkggeeqkwjd

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
behavioral2/memory/728-72-0x0000000002580000-0x0000000002592000-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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp

Executes dropped EXE 2 IoCs

pid	Process
1728	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp
4140	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp

Loads dropped DLL 5 IoCs

pid	Process
3812	regsvr32.exe
728	regsvr32.exe
1796	regsvr32.exe
4632	regsvr32.EXE
2944	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
3932	powershell.exe
4216	powershell.exe
4216	powershell.exe
3932	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	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
4140	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp
4140	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp
3932	powershell.exe
3932	powershell.exe
4216	powershell.exe
4216	powershell.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe
728	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3932	powershell.exe
Token: SeIncreaseQuotaPrivilege	3932	powershell.exe
Token: SeSecurityPrivilege	3932	powershell.exe
Token: SeTakeOwnershipPrivilege	3932	powershell.exe
Token: SeLoadDriverPrivilege	3932	powershell.exe
Token: SeSystemProfilePrivilege	3932	powershell.exe
Token: SeSystemtimePrivilege	3932	powershell.exe
Token: SeProfSingleProcessPrivilege	3932	powershell.exe
Token: SeIncBasePriorityPrivilege	3932	powershell.exe
Token: SeCreatePagefilePrivilege	3932	powershell.exe
Token: SeBackupPrivilege	3932	powershell.exe
Token: SeRestorePrivilege	3932	powershell.exe
Token: SeShutdownPrivilege	3932	powershell.exe
Token: SeDebugPrivilege	3932	powershell.exe
Token: SeSystemEnvironmentPrivilege	3932	powershell.exe
Token: SeRemoteShutdownPrivilege	3932	powershell.exe
Token: SeUndockPrivilege	3932	powershell.exe
Token: SeManageVolumePrivilege	3932	powershell.exe
Token: 33	3932	powershell.exe
Token: 34	3932	powershell.exe
Token: 35	3932	powershell.exe
Token: 36	3932	powershell.exe
Token: SeDebugPrivilege	4216	powershell.exe
Token: SeIncreaseQuotaPrivilege	4216	powershell.exe
Token: SeSecurityPrivilege	4216	powershell.exe
Token: SeTakeOwnershipPrivilege	4216	powershell.exe
Token: SeLoadDriverPrivilege	4216	powershell.exe
Token: SeSystemProfilePrivilege	4216	powershell.exe
Token: SeSystemtimePrivilege	4216	powershell.exe
Token: SeProfSingleProcessPrivilege	4216	powershell.exe
Token: SeIncBasePriorityPrivilege	4216	powershell.exe
Token: SeCreatePagefilePrivilege	4216	powershell.exe
Token: SeBackupPrivilege	4216	powershell.exe
Token: SeRestorePrivilege	4216	powershell.exe
Token: SeShutdownPrivilege	4216	powershell.exe
Token: SeDebugPrivilege	4216	powershell.exe
Token: SeSystemEnvironmentPrivilege	4216	powershell.exe
Token: SeRemoteShutdownPrivilege	4216	powershell.exe
Token: SeUndockPrivilege	4216	powershell.exe
Token: SeManageVolumePrivilege	4216	powershell.exe
Token: 33	4216	powershell.exe
Token: 34	4216	powershell.exe
Token: 35	4216	powershell.exe
Token: 36	4216	powershell.exe
Token: SeIncreaseQuotaPrivilege	4216	powershell.exe
Token: SeSecurityPrivilege	4216	powershell.exe
Token: SeTakeOwnershipPrivilege	4216	powershell.exe
Token: SeLoadDriverPrivilege	4216	powershell.exe
Token: SeSystemProfilePrivilege	4216	powershell.exe
Token: SeSystemtimePrivilege	4216	powershell.exe
Token: SeProfSingleProcessPrivilege	4216	powershell.exe
Token: SeIncBasePriorityPrivilege	4216	powershell.exe
Token: SeCreatePagefilePrivilege	4216	powershell.exe
Token: SeBackupPrivilege	4216	powershell.exe
Token: SeRestorePrivilege	4216	powershell.exe
Token: SeShutdownPrivilege	4216	powershell.exe
Token: SeDebugPrivilege	4216	powershell.exe
Token: SeSystemEnvironmentPrivilege	4216	powershell.exe
Token: SeRemoteShutdownPrivilege	4216	powershell.exe
Token: SeUndockPrivilege	4216	powershell.exe
Token: SeManageVolumePrivilege	4216	powershell.exe
Token: 33	4216	powershell.exe
Token: 34	4216	powershell.exe
Token: 35	4216	powershell.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4140	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
728	regsvr32.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 5012 wrote to memory of 1728	5012	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.exe	83
PID 5012 wrote to memory of 1728	5012	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.exe	83
PID 5012 wrote to memory of 1728	5012	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.exe	83
PID 1728 wrote to memory of 4064	1728	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp	84
PID 1728 wrote to memory of 4064	1728	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp	84
PID 1728 wrote to memory of 4064	1728	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp	84
PID 4064 wrote to memory of 4140	4064	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.exe	85
PID 4064 wrote to memory of 4140	4064	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.exe	85
PID 4064 wrote to memory of 4140	4064	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.exe	85
PID 4140 wrote to memory of 3812	4140	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp	86
PID 4140 wrote to memory of 3812	4140	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp	86
PID 4140 wrote to memory of 3812	4140	c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp	86
PID 3812 wrote to memory of 728	3812	regsvr32.exe	87
PID 3812 wrote to memory of 728	3812	regsvr32.exe	87
PID 728 wrote to memory of 3932	728	regsvr32.exe	88
PID 728 wrote to memory of 3932	728	regsvr32.exe	88
PID 728 wrote to memory of 4216	728	regsvr32.exe	91
PID 728 wrote to memory of 4216	728	regsvr32.exe	91
PID 728 wrote to memory of 1796	728	regsvr32.exe	94
PID 728 wrote to memory of 1796	728	regsvr32.exe	94

C:\Users\Admin\AppData\Local\Temp\c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.exe
"C:\Users\Admin\AppData\Local\Temp\c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5012
- C:\Users\Admin\AppData\Local\Temp\is-ROF0P.tmp\c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-ROF0P.tmp\c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp" /SL5="$801E2,450685,141312,C:\Users\Admin\AppData\Local\Temp\c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1728
- - C:\Users\Admin\AppData\Local\Temp\c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.exe
    "C:\Users\Admin\AppData\Local\Temp\c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.exe" /VERYSILENT
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4064
  - - C:\Users\Admin\AppData\Local\Temp\is-CKHGB.tmp\c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-CKHGB.tmp\c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp" /SL5="$901E2,450685,141312,C:\Users\Admin\AppData\Local\Temp\c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.exe" /VERYSILENT
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of FindShellTrayWindow
      Suspicious use of WriteProcessMemory
      PID:4140
    - - C:\Windows\SysWOW64\regsvr32.exe
        
        "regsvr32.exe" /s /i:360 C:\Users\Admin\AppData\Roaming\Setup_Coat.dll
        5⤵
        Loads dropped DLL
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:3812
      - C:\Windows\system32\regsvr32.exe
        
        /s /i:360 C:\Users\Admin\AppData\Roaming\Setup_Coat.dll
        6⤵
        Loads dropped DLL
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:728
        
        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_Coat.dll' }) { exit 0 } else { exit 1 }"
        7⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3932
        
        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_Coat.dll\") -Trigger (New-ScheduledTaskTrigger -Once -At (Get-Date).AddMinutes(1) -RepetitionInterval (New-TimeSpan -Minutes 1)) -TaskName 'MicrosoftEdgeUpdateTaskMachineUA{D756AC38-8ABF-411C-F3C5-4570E8E52126}' -Description 'Default' -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -ExecutionTimeLimit 0) -RunLevel Highest"
        7⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4216
        
        C:\Windows\system32\regsvr32.exe
        
        "regsvr32" /i:360 /s C:\Users\Admin\AppData\Roaming\Setup_Coat.dll
        7⤵
        Loads dropped DLL
        
        PID:1796

C:\Windows\system32\regsvr32.EXE
C:\Windows\system32\regsvr32.EXE /S /i:360 C:\Users\Admin\AppData\Roaming\Setup_Coat.dll
1⤵
- Loads dropped DLL
PID:4632

C:\Windows\system32\regsvr32.EXE
C:\Windows\system32\regsvr32.EXE /S /i:360 C:\Users\Admin\AppData\Roaming\Setup_Coat.dll
1⤵
- Loads dropped DLL
PID:2944

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

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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
5c641d18b890b47c1d4f0972a27444d5

SHA1
c5ea44d78b9b8cb63b6a6a3796f2a0a18573492b

SHA256
0075df4a2794b5f72a3e909914cac3ada446b8f7f2949a9c82bf931168d7c013

SHA512
4fb631952eea90f0863ef9e45c5a0dfa3e40c73601f72f2fc369b4abeedafd49430aada74dbfe3757f99af041730c082a2f591762c4ea7ab5b3d2df35a5aba63

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_sy0tfa0j.thd.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-66GJ6.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-ROF0P.tmp\c344f9de1aa1bf284d8281aff7b216ca85b2dde7fc05e1d13b5abcef37d4ca0d.tmp

Filesize
1.1MB

MD5
8fdc58c7d4c59472615682d6dea9d190

SHA1
8e131fe09fd238493719b4fd92e6c833bf3596c1

SHA256
26a5be637ee680b1ec11d1adf2fd0972cc52078cbd200d9273f8bb826707c83b

SHA512
b05b9fd8ff3d627b562cbd2968466fb54adbc2fa5591ebe803300a3c5ef7887bc1761d8013b47aab0f5387265c8b7b15078a01abb75d4c3180671780181ebe24

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

Filesize
724KB

MD5
6d3053a6f23cb5b6bd374cea07715ae8

SHA1
8bcb4c3d4d2d6a22b7af3382bfa38354244011e1

SHA256
5a6a75ae667580ab68530d72a351e906204514aabb4acd241d31fa6e18d45b58

SHA512
a7c135cfc1ce5ba9ecbcdba5f1698545cf16eaed5800bb63bdbbb995da1a8726bee79bdd4e4dd1b00671eb10a45baf34466cf0fdf3fc2c1a906aefca3bef5855

Download Submit
memory/728-74-0x00007FFAD21F0000-0x00007FFAD228E000-memory.dmp

Filesize
632KB

Download
memory/728-72-0x0000000002580000-0x0000000002592000-memory.dmp

Filesize
72KB

Download
memory/1728-7-0x0000000000400000-0x0000000000528000-memory.dmp

Filesize
1.2MB

Download
memory/1728-18-0x0000000000400000-0x0000000000528000-memory.dmp

Filesize
1.2MB

Download
memory/3932-43-0x000001EA30370000-0x000001EA30392000-memory.dmp

Filesize
136KB

Download
memory/4064-41-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/4064-16-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/4064-14-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/4140-39-0x0000000000400000-0x0000000000528000-memory.dmp

Filesize
1.2MB

Download
memory/4140-24-0x0000000000400000-0x0000000000528000-memory.dmp

Filesize
1.2MB

Download
memory/5012-0-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/5012-20-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/5012-2-0x0000000000401000-0x0000000000417000-memory.dmp

Filesize
88KB

Download