256d07c7196d58f02c9aeeb8f888d6d0f005c38a385fe54aea1c4192dd98fb07

Analysis

max time kernel
150s
max time network
96s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
12/10/2024, 19:48

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General

Target

test4.exe
Size

9.4MB
MD5

73d1cea4a5006924ed638debbaf499f2
SHA1

fe7460ba99fc162e5cdc86525593992645496ab5
SHA256

256d07c7196d58f02c9aeeb8f888d6d0f005c38a385fe54aea1c4192dd98fb07
SHA512

559520b507fb57873c499476c3e347d72ba869ce4d3ef3ae25609a19cb3c3776e761854a4837975832213910fabe8d55ee080737ae9f4d8d613318c5cdc29f94
SSDEEP

196608:dvfZZnCZww0CeVdEX4B5Afq/i7cXKP3ynEM1fe4clIkwiA4zOC3CRIOGhqw5Mz7:57CZwZ7EX6229q3bwi4RMqw5I

Score

10^/10

discovery evasion persistence pyinstaller

Malware Config

Signatures

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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe

Executes dropped EXE 6 IoCs

pid	Process
3928	test4.exe
412	icsys.icn.exe
2300	explorer.exe
3164	spoolsv.exe
4876	svchost.exe
1460	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\\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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO"	svchost.exe

Drops file in System32 directory 2 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

Drops file in Windows directory 5 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\resources\svchost.exe	spoolsv.exe
File opened for modification	C:\Windows\Resources\tjud.exe	explorer.exe
File opened for modification	C:\Windows\Resources\Themes\icsys.icn.exe	test4.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

Detects Pyinstaller 1 IoCs

pyinstaller

resource	yara_rule
behavioral2/files/0x000b000000023b83-7.dat	pyinstaller

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	test4.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
348	test4.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe
412	icsys.icn.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2300	explorer.exe
4876	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
348	test4.exe
348	test4.exe
412	icsys.icn.exe
412	icsys.icn.exe
2300	explorer.exe
2300	explorer.exe
3164	spoolsv.exe
3164	spoolsv.exe
4876	svchost.exe
4876	svchost.exe
1460	spoolsv.exe
1460	spoolsv.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 348 wrote to memory of 3928	348	test4.exe	85
PID 348 wrote to memory of 3928	348	test4.exe	85
PID 348 wrote to memory of 412	348	test4.exe	87
PID 348 wrote to memory of 412	348	test4.exe	87
PID 348 wrote to memory of 412	348	test4.exe	87
PID 412 wrote to memory of 2300	412	icsys.icn.exe	89
PID 412 wrote to memory of 2300	412	icsys.icn.exe	89
PID 412 wrote to memory of 2300	412	icsys.icn.exe	89
PID 2300 wrote to memory of 3164	2300	explorer.exe	90
PID 2300 wrote to memory of 3164	2300	explorer.exe	90
PID 2300 wrote to memory of 3164	2300	explorer.exe	90
PID 3164 wrote to memory of 4876	3164	spoolsv.exe	91
PID 3164 wrote to memory of 4876	3164	spoolsv.exe	91
PID 3164 wrote to memory of 4876	3164	spoolsv.exe	91
PID 4876 wrote to memory of 1460	4876	svchost.exe	92
PID 4876 wrote to memory of 1460	4876	svchost.exe	92
PID 4876 wrote to memory of 1460	4876	svchost.exe	92

C:\Users\Admin\AppData\Local\Temp\test4.exe
"C:\Users\Admin\AppData\Local\Temp\test4.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:348
- \??\c:\users\admin\appdata\local\temp\test4.exe
  c:\users\admin\appdata\local\temp\test4.exe
  2⤵
  - Executes dropped EXE
  PID:3928
- C:\Windows\Resources\Themes\icsys.icn.exe
  C:\Windows\Resources\Themes\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:412
- - \??\c:\windows\resources\themes\explorer.exe
    c:\windows\resources\themes\explorer.exe
    3⤵
    - 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: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2300
  - - \??\c:\windows\resources\spoolsv.exe
      c:\windows\resources\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:3164
    - - \??\c:\windows\resources\svchost.exe
        
        c:\windows\resources\svchost.exe
        5⤵
        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:4876
      - \??\c:\windows\resources\spoolsv.exe
        
        c:\windows\resources\spoolsv.exe PR
        6⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:1460

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

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\test4.exe

Filesize
9.2MB

MD5
bcc2ec5df92b3311268bd77a08f6c595

SHA1
72e06d959800f33b2aa9f9903979de4e15f12f83

SHA256
ef536b66c50cd2372d954dd790ef1a77bcac1632747d00cd425ae2272b44ce1c

SHA512
84a6942d26a54e376168990429fa44f033e7f39182338a30498cd9289c65f341a7abfa2b6706abdb32ea1c6b2ca6cbb82bf260aec8eddd71522b6dc1e6a153d5

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

Filesize
135KB

MD5
7caa6e9484182ad353f46ffdf40d2169

SHA1
129bf36e1adfe1e59d0481ab713ea06d8ae70059

SHA256
21e9fed50ae0552a99db01785c7e9c98c1bc8cff8a0106a9bad1f42fc0d00475

SHA512
0a7350de53d3cebb5c8a82d7311cb7382f134c11124de4094d1131194920fdc0b135b71207113523162ebf288252115dcf1598634c3297a70fb207b216bf7dd6

Download Submit
C:\Windows\Resources\Themes\icsys.icn.exe

Filesize
135KB

MD5
1e83d7c36a39f91fd355694fbbf5d908

SHA1
f914623c700649394a9a7b2b595401024257be91

SHA256
77bb53794a7a5ef1a19f17efe75270f07c6309c0b0f7c3cc496eafc6895eebce

SHA512
adca94f5c97fbf388fed36ebfb30c04442aa1d6c0cc9945ef65969c08a84f2c2c9fe9f4495c6fef081fbd037fc32749ffcb54428cc8811d9a7f164948e27c8cf

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

Filesize
135KB

MD5
d139b21e7ecae936c63d37cf2e3e314d

SHA1
f1f4e300b5a035cd48e08d88b775d3808ec55798

SHA256
e92fa94363158ff02df7cc1908ab80fd8b90c60dc5303ad8e15379186166189f

SHA512
df027944f8860f0251fdb86708e19e4bdc26b61d88d2bce5b21c6cab293cec084bc5a5269f6a6bf9458287db0431e5a6bc357c886675ff387fba18170521c5c0

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

Filesize
135KB

MD5
701a3d47cb88781a2c6b8a8d1834f31e

SHA1
4f6ddd25b5beff12bd502b8afb438e95e97b625b

SHA256
0b28d41d8f06af1c7baa453ae6a76bd3cbc534d362f30252f7693c2202973242

SHA512
ce491d10e8c49d04e9773958f21ee77b25028f8726e07dabf2a79414aedf4a898143efcfaaf5b002b77f314cc2fcc7b9e165630b2eb8759fab173b7d92879ef3

Download Submit
memory/348-47-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/348-0-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/412-11-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/412-46-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1460-44-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2300-48-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3164-45-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4876-49-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download