6beb5261404f30d097d40adfc431334a431e4c7f0378fba5d14387ade7d7ecd5

Analysis

max time kernel
85s
max time network
81s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
22/11/2024, 11:10

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General

Target

icsys.icn.exe
Size

135KB
MD5

df0a34b2c6ac70dfe57018f98866e4e7
SHA1

bc7a21fdc0c51ffee545833eb1769612cbd16918
SHA256

6beb5261404f30d097d40adfc431334a431e4c7f0378fba5d14387ade7d7ecd5
SHA512

d0a0e70b76b584cf63251a866888980ae19334b2cc89ef6aaa13c7aea18fbc9195300dee3f7a69933f150a4c82820b7eb8a8e2aa26f90ef940ea3de8ed5d65af
SSDEEP

1536:UfsEqouTRcG/Mzvgf7xEuvnXNTRdUzwTekUOisZ1yDDajtXbVXJ:UVqoCl/YgjxEufVU0TbTyDDalRJ

Score

10^/10

discovery evasion persistence

Malware Config

Signatures

Modifies visiblity of hidden/system files in Explorer 2 TTPs 4 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe

Executes dropped EXE 10 IoCs

pid	Process
384	explorer.exe
4384	spoolsv.exe
3852	svchost.exe
2552	spoolsv.exe
3380	spoolsv.exe
4400	svchost.exe
208	spoolsv.exe
1208	spoolsv.exe
4324	explorer.exe
5040	spoolsv.exe

Adds Run key to start application 2 TTPs 8 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\Svchost = "c:\\windows\\resources\\svchost.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO"	svchost.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\explorer.exe	explorer.exe
File opened for modification	C:\Windows\SysWOW64\explorer.exe	svchost.exe
File opened for modification	C:\Windows\SysWOW64\explorer.exe	svchost.exe
File opened for modification	C:\Windows\SysWOW64\explorer.exe	explorer.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Resources\tjud.exe	explorer.exe
File opened for modification	\??\c:\windows\resources\themes\explorer.exe	icsys.icn.exe
File opened for modification	\??\c:\windows\resources\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\resources\svchost.exe	spoolsv.exe

System Location Discovery: System Language Discovery 1 TTPs 11 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	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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	icsys.icn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A	taskmgr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName	taskmgr.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
440	icsys.icn.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe
384	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 4 IoCs

pid	Process
384	explorer.exe
3852	svchost.exe
4400	svchost.exe
4324	explorer.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4356	taskmgr.exe
Token: SeSystemProfilePrivilege	4356	taskmgr.exe
Token: SeCreateGlobalPrivilege	4356	taskmgr.exe

Suspicious use of FindShellTrayWindow 15 IoCs

pid	Process
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe

Suspicious use of SendNotifyMessage 15 IoCs

pid	Process
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe
4356	taskmgr.exe

Suspicious use of SetWindowsHookEx 22 IoCs

pid	Process
440	icsys.icn.exe
440	icsys.icn.exe
384	explorer.exe
384	explorer.exe
4384	spoolsv.exe
4384	spoolsv.exe
3852	svchost.exe
3852	svchost.exe
2552	spoolsv.exe
2552	spoolsv.exe
3380	spoolsv.exe
3380	spoolsv.exe
4400	svchost.exe
4400	svchost.exe
208	spoolsv.exe
208	spoolsv.exe
1208	spoolsv.exe
1208	spoolsv.exe
4324	explorer.exe
4324	explorer.exe
5040	spoolsv.exe
5040	spoolsv.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 440 wrote to memory of 384	440	icsys.icn.exe	82
PID 440 wrote to memory of 384	440	icsys.icn.exe	82
PID 440 wrote to memory of 384	440	icsys.icn.exe	82
PID 384 wrote to memory of 4384	384	explorer.exe	83
PID 384 wrote to memory of 4384	384	explorer.exe	83
PID 384 wrote to memory of 4384	384	explorer.exe	83
PID 4384 wrote to memory of 3852	4384	spoolsv.exe	84
PID 4384 wrote to memory of 3852	4384	spoolsv.exe	84
PID 4384 wrote to memory of 3852	4384	spoolsv.exe	84
PID 3852 wrote to memory of 2552	3852	svchost.exe	85
PID 3852 wrote to memory of 2552	3852	svchost.exe	85
PID 3852 wrote to memory of 2552	3852	svchost.exe	85
PID 384 wrote to memory of 3380	384	explorer.exe	98
PID 384 wrote to memory of 3380	384	explorer.exe	98
PID 384 wrote to memory of 3380	384	explorer.exe	98
PID 3380 wrote to memory of 4400	3380	spoolsv.exe	99
PID 3380 wrote to memory of 4400	3380	spoolsv.exe	99
PID 3380 wrote to memory of 4400	3380	spoolsv.exe	99
PID 4400 wrote to memory of 208	4400	svchost.exe	100
PID 4400 wrote to memory of 208	4400	svchost.exe	100
PID 4400 wrote to memory of 208	4400	svchost.exe	100
PID 4400 wrote to memory of 1208	4400	svchost.exe	101
PID 4400 wrote to memory of 1208	4400	svchost.exe	101
PID 4400 wrote to memory of 1208	4400	svchost.exe	101
PID 1208 wrote to memory of 4324	1208	spoolsv.exe	102
PID 1208 wrote to memory of 4324	1208	spoolsv.exe	102
PID 1208 wrote to memory of 4324	1208	spoolsv.exe	102
PID 4324 wrote to memory of 5040	4324	explorer.exe	103
PID 4324 wrote to memory of 5040	4324	explorer.exe	103
PID 4324 wrote to memory of 5040	4324	explorer.exe	103

C:\Users\Admin\AppData\Local\Temp\icsys.icn.exe
"C:\Users\Admin\AppData\Local\Temp\icsys.icn.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:440
- \??\c:\windows\resources\themes\explorer.exe
  c:\windows\resources\themes\explorer.exe
  2⤵
  - Modifies visiblity of hidden/system files in Explorer
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in System32 directory
  - 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:384
- - \??\c:\windows\resources\spoolsv.exe
    c:\windows\resources\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4384
  - - \??\c:\windows\resources\svchost.exe
      c:\windows\resources\svchost.exe
      4⤵
      Modifies visiblity of hidden/system files in Explorer
      Executes dropped EXE
      Adds Run key to start application
      Drops file in System32 directory
      System Location Discovery: System Language Discovery
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:3852
    - - \??\c:\windows\resources\spoolsv.exe
        
        c:\windows\resources\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2552
- - \??\c:\windows\resources\spoolsv.exe
    c:\windows\resources\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3380
  - - \??\c:\windows\resources\svchost.exe
      c:\windows\resources\svchost.exe
      4⤵
      Modifies visiblity of hidden/system files in Explorer
      Executes dropped EXE
      Adds Run key to start application
      Drops file in System32 directory
      System Location Discovery: System Language Discovery
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:4400
    - - \??\c:\windows\resources\spoolsv.exe
        
        c:\windows\resources\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:208
    - - \??\c:\windows\resources\spoolsv.exe
        
        c:\windows\resources\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:1208
      - \??\c:\windows\resources\themes\explorer.exe
        
        c:\windows\resources\themes\explorer.exe
        6⤵
        Modifies visiblity of hidden/system files in Explorer
        Executes dropped EXE
        Adds Run key to start application
        Drops file in System32 directory
        System Location Discovery: System Language Discovery
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:4324
        
        \??\c:\windows\resources\spoolsv.exe
        
        c:\windows\resources\spoolsv.exe SE
        7⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:5040

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1324

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /0
1⤵
- Checks SCSI registry key(s)
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:4356

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

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

C:\Windows\Resources\Themes\explorer.exe

Filesize
135KB

MD5
fbf2eb1212b960cfe391563bbe98b8be

SHA1
87a4ab1573302e0ca6703628db5c6003e4ccf5b2

SHA256
3948b47aee70811bc3bfa729f0e6a28e76e07a35a5e307ad01b2559bf34648e4

SHA512
e6399d6b4d6b589bd55ea3f5820a3bce81ec45c709f810dc5206707db4da802d54fd32e7139538514e8d0751901ead94042d3112327cbc76f9557e7c8643cd18

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

Filesize
135KB

MD5
859ed113b0110f57851b29d258a0a497

SHA1
caeb7c3a95012636cad17f9e54de9718070aba31

SHA256
a4f68ee00bd498a927287ac80bc4f3d1ac74fd7089e3548d2608f3a516d08385

SHA512
8c0bf1add7acc867d6e59431b6d1a3f8d2ce6ca7f559c754f904d32a23b755c60e03b144d9ed84003bdc39a70e07c365d1477fcf15812a1245907ed67481ebde

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

Filesize
135KB

MD5
2e11bfd95ff4f0d7c9a8a2fbe77f4096

SHA1
fed52d940e9f5cfe4de606d8ab3dc51f1f5bb6dc

SHA256
107cf8bd0b3e9899d3fe6dd91828b1bd4013fe57389caf358cc1df2ab37a0c93

SHA512
941e9c5155bbfdf54e5aa078e2808e02da9b9783e6d2074badbece4f01f4dc69d54d89c9f2f463f6bd90dcc2c793eeefae76fa0d4aab13148bb5267981a386ac

Download Submit
memory/208-62-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/384-9-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/384-64-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/440-0-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/440-35-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1208-78-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2552-33-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3380-63-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3852-49-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4356-47-0x0000018EFEA70000-0x0000018EFEA71000-memory.dmp

Filesize
4KB

Download
memory/4356-46-0x0000018EFEA70000-0x0000018EFEA71000-memory.dmp

Filesize
4KB

Download
memory/4356-45-0x0000018EFEA70000-0x0000018EFEA71000-memory.dmp

Filesize
4KB

Download
memory/4356-44-0x0000018EFEA70000-0x0000018EFEA71000-memory.dmp

Filesize
4KB

Download
memory/4356-43-0x0000018EFEA70000-0x0000018EFEA71000-memory.dmp

Filesize
4KB

Download
memory/4356-42-0x0000018EFEA70000-0x0000018EFEA71000-memory.dmp

Filesize
4KB

Download
memory/4356-48-0x0000018EFEA70000-0x0000018EFEA71000-memory.dmp

Filesize
4KB

Download
memory/4356-38-0x0000018EFEA70000-0x0000018EFEA71000-memory.dmp

Filesize
4KB

Download
memory/4356-37-0x0000018EFEA70000-0x0000018EFEA71000-memory.dmp

Filesize
4KB

Download
memory/4356-36-0x0000018EFEA70000-0x0000018EFEA71000-memory.dmp

Filesize
4KB

Download
memory/4384-34-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/5040-77-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download