d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
14/10/2024, 04:06

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General

Target

d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc.exe
Size

255KB
MD5

d298e59c984f1814754b040cedc857a0
SHA1

c6b5bf48d5ef8152e838927957ba215b0c5f223d
SHA256

d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc
SHA512

2dae71bc19d2a9f1c15639f9e96b3bcae6e832b08777591413622d1059e28225e13cfef07b28df6f9a4bdc8d45c81ef43fcf357248a6ee6073be896d72f13a0e
SSDEEP

6144:zvEN2U+T6i5LirrllHy4HUcMQY6A7290/5:zENN+T5xYrllrU7QY6WB

Score

10^/10

discovery evasion persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	svchost.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Boot or Logon Autostart Execution: Active Setup 2 TTPs 8 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	svchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	svchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	explorer.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe

Executes dropped EXE 6 IoCs

pid	Process
396	d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc.exe
1980	icsys.icn.exe
1952	explorer.exe
2068	spoolsv.exe
100	svchost.exe
3196	spoolsv.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\system\\explorer.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\system\\explorer.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	svchost.exe

Drops file in Windows directory 6 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\system\explorer.exe	icsys.icn.exe
File opened for modification	\??\c:\windows\system\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	spoolsv.exe
File opened for modification	\??\c:\windows\system\explorer.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	svchost.exe
File opened for modification	C:\Windows\system\udsys.exe	explorer.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 9 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	d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icsys.icn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1980	icsys.icn.exe
1980	icsys.icn.exe
1952	explorer.exe
1952	explorer.exe
1952	explorer.exe
1952	explorer.exe
1952	explorer.exe
1952	explorer.exe
100	svchost.exe
100	svchost.exe
100	svchost.exe
100	svchost.exe
1952	explorer.exe
1952	explorer.exe
100	svchost.exe
100	svchost.exe
1952	explorer.exe
1952	explorer.exe
100	svchost.exe
100	svchost.exe
1952	explorer.exe
1952	explorer.exe
100	svchost.exe
100	svchost.exe
1952	explorer.exe
1952	explorer.exe
100	svchost.exe
100	svchost.exe
1952	explorer.exe
1952	explorer.exe
1952	explorer.exe
100	svchost.exe
1952	explorer.exe
100	svchost.exe
1952	explorer.exe
100	svchost.exe
1952	explorer.exe
100	svchost.exe
1952	explorer.exe
100	svchost.exe
1952	explorer.exe
100	svchost.exe
1952	explorer.exe
100	svchost.exe
1952	explorer.exe
100	svchost.exe
1952	explorer.exe
100	svchost.exe
1952	explorer.exe
100	svchost.exe
1952	explorer.exe
100	svchost.exe
1952	explorer.exe
100	svchost.exe
1952	explorer.exe
100	svchost.exe
1952	explorer.exe
100	svchost.exe
1952	explorer.exe
100	svchost.exe
1952	explorer.exe
100	svchost.exe
1952	explorer.exe
100	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
1952	explorer.exe
100	svchost.exe

Suspicious use of SetWindowsHookEx 14 IoCs

pid	Process
4912	d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc.exe
4912	d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc.exe
1980	icsys.icn.exe
1980	icsys.icn.exe
1952	explorer.exe
1952	explorer.exe
2068	spoolsv.exe
2068	spoolsv.exe
100	svchost.exe
100	svchost.exe
3196	spoolsv.exe
3196	spoolsv.exe
1952	explorer.exe
1952	explorer.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4912 wrote to memory of 396	4912	d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc.exe	86
PID 4912 wrote to memory of 396	4912	d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc.exe	86
PID 4912 wrote to memory of 1980	4912	d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc.exe	88
PID 4912 wrote to memory of 1980	4912	d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc.exe	88
PID 4912 wrote to memory of 1980	4912	d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc.exe	88
PID 1980 wrote to memory of 1952	1980	icsys.icn.exe	89
PID 1980 wrote to memory of 1952	1980	icsys.icn.exe	89
PID 1980 wrote to memory of 1952	1980	icsys.icn.exe	89
PID 1952 wrote to memory of 2068	1952	explorer.exe	90
PID 1952 wrote to memory of 2068	1952	explorer.exe	90
PID 1952 wrote to memory of 2068	1952	explorer.exe	90
PID 2068 wrote to memory of 100	2068	spoolsv.exe	91
PID 2068 wrote to memory of 100	2068	spoolsv.exe	91
PID 2068 wrote to memory of 100	2068	spoolsv.exe	91
PID 100 wrote to memory of 3196	100	svchost.exe	92
PID 100 wrote to memory of 3196	100	svchost.exe	92
PID 100 wrote to memory of 3196	100	svchost.exe	92
PID 100 wrote to memory of 1276	100	svchost.exe	93
PID 100 wrote to memory of 1276	100	svchost.exe	93
PID 100 wrote to memory of 1276	100	svchost.exe	93
PID 100 wrote to memory of 4048	100	svchost.exe	98
PID 100 wrote to memory of 4048	100	svchost.exe	98
PID 100 wrote to memory of 4048	100	svchost.exe	98
PID 100 wrote to memory of 4564	100	svchost.exe	100
PID 100 wrote to memory of 4564	100	svchost.exe	100
PID 100 wrote to memory of 4564	100	svchost.exe	100

C:\Users\Admin\AppData\Local\Temp\d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc.exe
"C:\Users\Admin\AppData\Local\Temp\d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4912
- \??\c:\users\admin\appdata\local\temp\d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc.exe
  c:\users\admin\appdata\local\temp\d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc.exe
  2⤵
  - Executes dropped EXE
  PID:396
- C:\Users\Admin\AppData\Local\icsys.icn.exe
  C:\Users\Admin\AppData\Local\icsys.icn.exe
  2⤵
  - Executes dropped EXE
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1980
- - \??\c:\windows\system\explorer.exe
    c:\windows\system\explorer.exe
    3⤵
    - Modifies WinLogon for persistence
    - Modifies visiblity of hidden/system files in Explorer
    - Boot or Logon Autostart Execution: Active Setup
    - Executes dropped EXE
    - Adds Run key to start application
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1952
  - - \??\c:\windows\system\spoolsv.exe
      c:\windows\system\spoolsv.exe SE
      4⤵
      Executes dropped EXE
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2068
    - - \??\c:\windows\system\svchost.exe
        
        c:\windows\system\svchost.exe
        5⤵
        Modifies WinLogon for persistence
        Modifies visiblity of hidden/system files in Explorer
        Boot or Logon Autostart Execution: Active Setup
        Executes dropped EXE
        Adds Run key to start application
        Drops file in Windows directory
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:100
      - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        6⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:3196
      - C:\Windows\SysWOW64\at.exe
        
        at 04:08 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:1276
      - C:\Windows\SysWOW64\at.exe
        
        at 04:09 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:4048
      - C:\Windows\SysWOW64\at.exe
        
        at 04:10 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:4564

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

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

C:\Users\Admin\AppData\Local\Temp\d1322936eef9707b3aae7c71f2e5a81b0190710ba5ac4b7c3a845f2a7f4fafdc.exe

Filesize
47KB

MD5
1192935bc75a50e8af4c6ea7ede378f4

SHA1
4398f671efcaa8b36451a7eb65c925a8c0e4fc93

SHA256
2c03c4f91ce923039be8c7756bd68668e7eb72341ff18b2daeabe4ce84787624

SHA512
95b49334cb12012c398484604bb64bcf8be82844cf74cb449f024868a817a9649f6075eab9d15232fae2606448184426ac8459f48eac7596339cf83b1fe317ce

Download Submit
C:\Users\Admin\AppData\Local\icsys.icn.exe

Filesize
207KB

MD5
b5a1254295268c1f39a08baa63300df0

SHA1
93f3961647b9a7d07d761467217f5f847a0f3619

SHA256
1f816824de8726b0be8f2de63562d6c8daa92204091677ec71f5917b3e7dd3f2

SHA512
e9a2ec81f948a477ff45038db88aab2ce86dfab0d153b89f938ec2cb4708b47bc256c03d98a1f72b2eb2456632dada0d096297d442e9d92d726ca76ca90278dc

Download Submit
C:\Users\Admin\AppData\Roaming\mrsys.exe

Filesize
206KB

MD5
895868485aa56fdaa82babbb6b74ebe2

SHA1
0d61525c800420099505691ec126f2540b00e48f

SHA256
09d6f8d84c4962f9d996ab587a43068140048d896fdb2c7252eff66faa81fda8

SHA512
aa06eb13fb8ccd16c5000b64e24271e825c61bcefdb3307faa891c0ea34fef664520997aae7972cfd22e8ced86919d38120763bbe13f384053bbf0283cf3763e

Download Submit
C:\Windows\System\explorer.exe

Filesize
206KB

MD5
7286209cf6cb5f9c1262c3550f242b7b

SHA1
f1056195ee47b59e7d33b03dee2921546e4a1f6e

SHA256
d6ac1dc677ac9d7e901038f2140f75215f40de3d556ec7d74088c696d8a9def2

SHA512
7abbf688d699f7da92a7877526426ca030fbad23f8ac9482c7784b42d1a95c10e2eee6a7fb082b4e5bd24d3e80e5cac68d261d297bd333f03e52cac306cd8950

Download Submit
C:\Windows\System\spoolsv.exe

Filesize
206KB

MD5
ae1d4a99b07d2708fe53ea3ada972741

SHA1
d70b547df3228a66d245a2d096be9944402ccdb7

SHA256
8202c8bfea2042aa33e9c416a696ff20672b0ff437fc06070fd00b153f34aea3

SHA512
fb79ddf1f16c8d3531b7a92a71094d58d50131d848e3ea645550ee0f5238e54f05d28ca285f70b8436ae77177cff41bdf795a10831ab4db4597e5834e6c80a9f

Download Submit
C:\Windows\System\svchost.exe

Filesize
206KB

MD5
0062dffa5ea01125fb312e609cca11ed

SHA1
fb26f0e6455cafc8b554144e12cd2eecc7d1ea78

SHA256
d29d969cb25d77a8def2adc7c81bf4900e518efabf1373a36e277b407c68112d

SHA512
763fd1200100a64325475c40c056bcd9a06c986c051551d901bd8700944b86197161e78604582b44decdebded604585429b038fd49873b16e66a851463721d67

Download Submit