d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b

Analysis

max time kernel
150s
max time network
19s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
22-11-2024 04:41

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General

Target

d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
Size

1.7MB
MD5

0178ff72c4305610a2490c1721c5872d
SHA1

94a203b8230fff1b71e761b7945faeea2bb3fdd3
SHA256

d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b
SHA512

3bcaf7122c2fb8ad6c2374db8f1b9787b38e7dfaceb9e92ac1c8394483405c040748854b14ab7ffad4fcad868e3b3118e45682539243a1c80d545dd0c3b9dded
SSDEEP

24576:PFOaY8U9+A6KdMt7ZRuYfuv9dTWGNj0GvXFGfkRssBUEt3kRQrf7zSIBDICweAVA:txUUvltf6SGd/FGfIsTE665h0dEY2nF

Score

10^/10

discovery evasion persistence upx

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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Executes dropped EXE 6 IoCs

pid	Process
2252	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2276	icsys.icn.exe
2996	explorer.exe
2748	spoolsv.exe
3020	svchost.exe
2788	spoolsv.exe

Loads dropped DLL 6 IoCs

pid	Process
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2276	icsys.icn.exe
2996	explorer.exe
2748	spoolsv.exe
3020	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\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

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/files/0x0009000000016d69-6.dat	upx
behavioral1/memory/2252-10-0x000000013F430000-0x000000013F89E000-memory.dmp	upx
behavioral1/memory/2252-12-0x000000013F430000-0x000000013F89E000-memory.dmp	upx

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	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.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

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	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	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.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	explorer.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
1060	schtasks.exe
2556	schtasks.exe
560	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2996	explorer.exe
2996	explorer.exe
2996	explorer.exe
2996	explorer.exe
2996	explorer.exe
2996	explorer.exe
2996	explorer.exe
2996	explorer.exe
2996	explorer.exe
2996	explorer.exe
2996	explorer.exe
2996	explorer.exe
2996	explorer.exe
2996	explorer.exe
2996	explorer.exe
2996	explorer.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2996	explorer.exe
3020	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
2276	icsys.icn.exe
2276	icsys.icn.exe
2996	explorer.exe
2996	explorer.exe
2748	spoolsv.exe
2748	spoolsv.exe
3020	svchost.exe
3020	svchost.exe
2788	spoolsv.exe
2788	spoolsv.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 2108 wrote to memory of 2252	2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe	30
PID 2108 wrote to memory of 2252	2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe	30
PID 2108 wrote to memory of 2252	2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe	30
PID 2108 wrote to memory of 2252	2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe	30
PID 2108 wrote to memory of 2276	2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe	31
PID 2108 wrote to memory of 2276	2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe	31
PID 2108 wrote to memory of 2276	2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe	31
PID 2108 wrote to memory of 2276	2108	d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe	31
PID 2276 wrote to memory of 2996	2276	icsys.icn.exe	32
PID 2276 wrote to memory of 2996	2276	icsys.icn.exe	32
PID 2276 wrote to memory of 2996	2276	icsys.icn.exe	32
PID 2276 wrote to memory of 2996	2276	icsys.icn.exe	32
PID 2996 wrote to memory of 2748	2996	explorer.exe	33
PID 2996 wrote to memory of 2748	2996	explorer.exe	33
PID 2996 wrote to memory of 2748	2996	explorer.exe	33
PID 2996 wrote to memory of 2748	2996	explorer.exe	33
PID 2748 wrote to memory of 3020	2748	spoolsv.exe	34
PID 2748 wrote to memory of 3020	2748	spoolsv.exe	34
PID 2748 wrote to memory of 3020	2748	spoolsv.exe	34
PID 2748 wrote to memory of 3020	2748	spoolsv.exe	34
PID 3020 wrote to memory of 2788	3020	svchost.exe	35
PID 3020 wrote to memory of 2788	3020	svchost.exe	35
PID 3020 wrote to memory of 2788	3020	svchost.exe	35
PID 3020 wrote to memory of 2788	3020	svchost.exe	35
PID 2996 wrote to memory of 2356	2996	explorer.exe	36
PID 2996 wrote to memory of 2356	2996	explorer.exe	36
PID 2996 wrote to memory of 2356	2996	explorer.exe	36
PID 2996 wrote to memory of 2356	2996	explorer.exe	36
PID 3020 wrote to memory of 2556	3020	svchost.exe	37
PID 3020 wrote to memory of 2556	3020	svchost.exe	37
PID 3020 wrote to memory of 2556	3020	svchost.exe	37
PID 3020 wrote to memory of 2556	3020	svchost.exe	37
PID 3020 wrote to memory of 560	3020	svchost.exe	40
PID 3020 wrote to memory of 560	3020	svchost.exe	40
PID 3020 wrote to memory of 560	3020	svchost.exe	40
PID 3020 wrote to memory of 560	3020	svchost.exe	40
PID 3020 wrote to memory of 1060	3020	svchost.exe	42
PID 3020 wrote to memory of 1060	3020	svchost.exe	42
PID 3020 wrote to memory of 1060	3020	svchost.exe	42
PID 3020 wrote to memory of 1060	3020	svchost.exe	42

C:\Users\Admin\AppData\Local\Temp\d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
"C:\Users\Admin\AppData\Local\Temp\d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.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:2108
- \??\c:\users\admin\appdata\local\temp\d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
  c:\users\admin\appdata\local\temp\d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe
  2⤵
  - Executes dropped EXE
  PID:2252
- 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:2276
- - \??\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:2996
  - - \??\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:2748
    - - \??\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:3020
      - \??\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:2788
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 04:43 /f
        6⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2556
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 04:44 /f
        6⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:560
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 04:45 /f
        6⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1060
  - - C:\Windows\Explorer.exe
      C:\Windows\Explorer.exe
      4⤵
      PID:2356

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
02788a2f800d0b8b98d70b03f8ddf4a1

SHA1
ba3004e8f5e948ebbb3ffd0d429bf6c2cb0b9629

SHA256
1fbd5d9977ed402a8e88eb36ef8f183546649c0cd9928decc899e79fd1e52ecf

SHA512
269cf6135e9501a2f179e3d98edf7e6d8a1251db5253ae746289eee7a2b004640c09d2ee5c432f49bd1d273ca08917d2ff4dbe0fb055785c55ba252b0a1f4299

Download Submit
\Users\Admin\AppData\Local\Temp\d4eff098ca4b5971142fb965c3b8bac69aa57f689d489bc0309d925ad838c35b.exe

Filesize
1.5MB

MD5
8fe64da09af371b02a31828415ece8f3

SHA1
5b5c90dcd425c814b555a4567405601aa977ee0b

SHA256
8279696c1d78b14618500e9135886a3667b9decc65946f3729002e4bfdbb20ab

SHA512
e49f9b1c9d33364101ad2fd4f2c5ed030700cc941bb469cf2ce7d5b32c51cab9e62b265e05cbd92435453e7e4008c9990bea532298676f7d81e5d6dcdc2f590b

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

Filesize
135KB

MD5
5bc0d98b2144f558d6657e0accc4319f

SHA1
b907c2bbde687ae7cd7964015dbbb9e4c918334b

SHA256
76c19f8ae64b7009c6d3b894dc77e8cfbb9dafc17b3196010c98d130394088a6

SHA512
3dbccf2183ea4cce94a9fe3a42fe1c51a5642df2b50f49f52cbe96ba78ddc256061210b29898eceafbe7342d17f0f87fc78b956673b3e1edc103abaee149a57e

Download Submit
\Windows\Resources\spoolsv.exe

Filesize
135KB

MD5
7c0a7a980727ba963be4404c246eebdf

SHA1
e55c2cdb5e0b62e4478469798c81b675cd9c6fca

SHA256
043430fb0a70184d9147a5a6d5d6a17370b3bca87ba8623f6bbd4b628c10a8ff

SHA512
e0b3365e936826b8181f6b7a099d142377c75b389e3bbdc68cab589087cf5d4d1ef19145c4562b121c0756e469a545048df8b55ad678491108d73bc2641e1a53

Download Submit
\Windows\Resources\svchost.exe

Filesize
135KB

MD5
17118a6c3454d0e9ee0738ca5efe2d0f

SHA1
6d155f67d2de96845152e525a6e72cc9a661918e

SHA256
fe4e34eae0a8d5176eb264ad84fa5a7482742817e30369e542b595b9a24f185d

SHA512
6da52622a9100cb5e68300cf77e543ff8212a531d41e57dac928d62f471da53f729a33770ac08212cd2317d914e3c779b264abd78ea0f1e89608010c2eaab10c

Download Submit
memory/2108-0-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2108-17-0x0000000000290000-0x00000000002AF000-memory.dmp

Filesize
124KB

Download
memory/2108-8-0x0000000002C10000-0x000000000307E000-memory.dmp

Filesize
4.4MB

Download
memory/2108-65-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2108-52-0x0000000002C10000-0x000000000307E000-memory.dmp

Filesize
4.4MB

Download
memory/2252-10-0x000000013F430000-0x000000013F89E000-memory.dmp

Filesize
4.4MB

Download
memory/2252-12-0x000000013F430000-0x000000013F89E000-memory.dmp

Filesize
4.4MB

Download
memory/2276-28-0x0000000000290000-0x00000000002AF000-memory.dmp

Filesize
124KB

Download
memory/2276-64-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2748-47-0x0000000002460000-0x000000000247F000-memory.dmp

Filesize
124KB

Download
memory/2748-63-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2788-62-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2996-66-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3020-53-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3020-57-0x0000000000300000-0x000000000031F000-memory.dmp

Filesize
124KB

Download
memory/3020-67-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3020-68-0x0000000000300000-0x000000000031F000-memory.dmp

Filesize
124KB

Download