256d07c7196d58f02c9aeeb8f888d6d0f005c38a385fe54aea1c4192dd98fb07

Analysis

max time kernel
150s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe

Executes dropped EXE 6 IoCs

pid	Process
2980	test4.exe
644	icsys.icn.exe
2004	explorer.exe
2788	spoolsv.exe
2700	svchost.exe
2704	spoolsv.exe

Loads dropped DLL 7 IoCs

pid	Process
2312	test4.exe
2312	test4.exe
2300	Process not Found
644	icsys.icn.exe
2004	explorer.exe
2788	spoolsv.exe
2700	svchost.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\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"	svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
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 5 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\resources\spoolsv.exe	explorer.exe
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

Detects Pyinstaller 1 IoCs

pyinstaller

resource	yara_rule
behavioral1/files/0x0007000000016aa9-6.dat	pyinstaller

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

Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2680	schtasks.exe
1084	schtasks.exe
1380	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2312	test4.exe
2312	test4.exe
2312	test4.exe
2312	test4.exe
2312	test4.exe
2312	test4.exe
2312	test4.exe
2312	test4.exe
2312	test4.exe
2312	test4.exe
2312	test4.exe
2312	test4.exe
2312	test4.exe
2312	test4.exe
2312	test4.exe
2312	test4.exe
644	icsys.icn.exe
644	icsys.icn.exe
644	icsys.icn.exe
644	icsys.icn.exe
644	icsys.icn.exe
644	icsys.icn.exe
644	icsys.icn.exe
644	icsys.icn.exe
644	icsys.icn.exe
644	icsys.icn.exe
644	icsys.icn.exe
644	icsys.icn.exe
644	icsys.icn.exe
644	icsys.icn.exe
644	icsys.icn.exe
644	icsys.icn.exe
644	icsys.icn.exe
2004	explorer.exe
2004	explorer.exe
2004	explorer.exe
2004	explorer.exe
2004	explorer.exe
2004	explorer.exe
2004	explorer.exe
2004	explorer.exe
2004	explorer.exe
2004	explorer.exe
2004	explorer.exe
2004	explorer.exe
2004	explorer.exe
2004	explorer.exe
2004	explorer.exe
2004	explorer.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2700	svchost.exe
2004	explorer.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2312	test4.exe
2312	test4.exe
644	icsys.icn.exe
644	icsys.icn.exe
2004	explorer.exe
2004	explorer.exe
2788	spoolsv.exe
2788	spoolsv.exe
2700	svchost.exe
2700	svchost.exe
2704	spoolsv.exe
2704	spoolsv.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 2312 wrote to memory of 2980	2312	test4.exe	31
PID 2312 wrote to memory of 2980	2312	test4.exe	31
PID 2312 wrote to memory of 2980	2312	test4.exe	31
PID 2312 wrote to memory of 2980	2312	test4.exe	31
PID 2312 wrote to memory of 644	2312	test4.exe	32
PID 2312 wrote to memory of 644	2312	test4.exe	32
PID 2312 wrote to memory of 644	2312	test4.exe	32
PID 2312 wrote to memory of 644	2312	test4.exe	32
PID 644 wrote to memory of 2004	644	icsys.icn.exe	34
PID 644 wrote to memory of 2004	644	icsys.icn.exe	34
PID 644 wrote to memory of 2004	644	icsys.icn.exe	34
PID 644 wrote to memory of 2004	644	icsys.icn.exe	34
PID 2004 wrote to memory of 2788	2004	explorer.exe	35
PID 2004 wrote to memory of 2788	2004	explorer.exe	35
PID 2004 wrote to memory of 2788	2004	explorer.exe	35
PID 2004 wrote to memory of 2788	2004	explorer.exe	35
PID 2788 wrote to memory of 2700	2788	spoolsv.exe	36
PID 2788 wrote to memory of 2700	2788	spoolsv.exe	36
PID 2788 wrote to memory of 2700	2788	spoolsv.exe	36
PID 2788 wrote to memory of 2700	2788	spoolsv.exe	36
PID 2700 wrote to memory of 2704	2700	svchost.exe	37
PID 2700 wrote to memory of 2704	2700	svchost.exe	37
PID 2700 wrote to memory of 2704	2700	svchost.exe	37
PID 2700 wrote to memory of 2704	2700	svchost.exe	37
PID 2004 wrote to memory of 2904	2004	explorer.exe	38
PID 2004 wrote to memory of 2904	2004	explorer.exe	38
PID 2004 wrote to memory of 2904	2004	explorer.exe	38
PID 2004 wrote to memory of 2904	2004	explorer.exe	38
PID 2700 wrote to memory of 2680	2700	svchost.exe	39
PID 2700 wrote to memory of 2680	2700	svchost.exe	39
PID 2700 wrote to memory of 2680	2700	svchost.exe	39
PID 2700 wrote to memory of 2680	2700	svchost.exe	39
PID 2700 wrote to memory of 1084	2700	svchost.exe	42
PID 2700 wrote to memory of 1084	2700	svchost.exe	42
PID 2700 wrote to memory of 1084	2700	svchost.exe	42
PID 2700 wrote to memory of 1084	2700	svchost.exe	42
PID 2700 wrote to memory of 1380	2700	svchost.exe	45
PID 2700 wrote to memory of 1380	2700	svchost.exe	45
PID 2700 wrote to memory of 1380	2700	svchost.exe	45
PID 2700 wrote to memory of 1380	2700	svchost.exe	45

C:\Users\Admin\AppData\Local\Temp\test4.exe
"C:\Users\Admin\AppData\Local\Temp\test4.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2312
- \??\c:\users\admin\appdata\local\temp\test4.exe
  c:\users\admin\appdata\local\temp\test4.exe
  2⤵
  - Executes dropped EXE
  PID:2980
- C:\Windows\Resources\Themes\icsys.icn.exe
  C:\Windows\Resources\Themes\icsys.icn.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:644
- - \??\c:\windows\resources\themes\explorer.exe
    c:\windows\resources\themes\explorer.exe
    3⤵
    - Modifies visiblity of hidden/system files in Explorer
    - Executes dropped EXE
    - Loads dropped DLL
    - 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:2004
  - - \??\c:\windows\resources\spoolsv.exe
      c:\windows\resources\spoolsv.exe SE
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2788
    - - \??\c:\windows\resources\svchost.exe
        
        c:\windows\resources\svchost.exe
        5⤵
        Modifies visiblity of hidden/system files in Explorer
        Executes dropped EXE
        Loads dropped DLL
        Adds Run key to start application
        Drops file in System32 directory
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:2700
      - \??\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:2704
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 19:50 /f
        6⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2680
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 19:51 /f
        6⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1084
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 19:52 /f
        6⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1380
  - - C:\Windows\Explorer.exe
      C:\Windows\Explorer.exe
      4⤵
      PID:2904

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

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:\Windows\Resources\Themes\explorer.exe

Filesize
135KB

MD5
b6e235f6253da610d4bd753b9143f7ed

SHA1
c11e2230bdd73969648984db565703b657661765

SHA256
a4e940bf3c9d5a30322b007819cfe587bd62e13625ea3334804471a8a8d023bc

SHA512
a3b6ad66e439311939d85c134ec8eca280cd843ccca2a1a9c19a8046576ca4d19226ea9f58cc962963260825eb7635d84be8b565a962ba1ecb0d862f657d63b3

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

Filesize
135KB

MD5
1e83d7c36a39f91fd355694fbbf5d908

SHA1
f914623c700649394a9a7b2b595401024257be91

SHA256
77bb53794a7a5ef1a19f17efe75270f07c6309c0b0f7c3cc496eafc6895eebce

SHA512
adca94f5c97fbf388fed36ebfb30c04442aa1d6c0cc9945ef65969c08a84f2c2c9fe9f4495c6fef081fbd037fc32749ffcb54428cc8811d9a7f164948e27c8cf

Download Submit
\??\c:\windows\resources\svchost.exe

Filesize
135KB

MD5
7ae2c5ac8ac20d7f84f92a499a543238

SHA1
00dbe0fefaa5242f0cdb11a0b2a34651a2a04e99

SHA256
e9003a67c1271fbdc93a0a4ce72b4f21172935fa02b6b089d073c1e9cea9e1e4

SHA512
aa9278aa36373f59e58b273a5086dbe5a3d1574fe0a8541bce0bf0f903a7964e3be5768b2aede9238eba464b88efc283acdf9eb0db076d4b5e939df042e2c7bf

Download Submit
\Users\Admin\AppData\Local\Temp\test4.exe

Filesize
9.2MB

MD5
bcc2ec5df92b3311268bd77a08f6c595

SHA1
72e06d959800f33b2aa9f9903979de4e15f12f83

SHA256
ef536b66c50cd2372d954dd790ef1a77bcac1632747d00cd425ae2272b44ce1c

SHA512
84a6942d26a54e376168990429fa44f033e7f39182338a30498cd9289c65f341a7abfa2b6706abdb32ea1c6b2ca6cbb82bf260aec8eddd71522b6dc1e6a153d5

Download Submit
\Windows\Resources\spoolsv.exe

Filesize
135KB

MD5
1a7879df3d5347ac7ef9d923ce7a69a0

SHA1
5c47c65b753e9977dc6c2beff3945932591fb2ad

SHA256
6ffc0e6879a724c8d3689078d127880274dda95e48706d3eb09d15be8db9241a

SHA512
3f194b03629a4c61aea8c6b745e547ce08a13ca1e94a7212f232c11acb198ec79393065f397a364a38302849c7da59cec1a50c52b18b5f7b648d86da47171367

Download Submit
memory/644-57-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2004-58-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2312-0-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2312-21-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2700-59-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2704-55-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2788-56-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download