177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335

Analysis

max time kernel
150s
max time network
119s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
03-07-2024 19:10

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General

Target

177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
Size

1.1MB
MD5

6f2aebdb1b53aa108cc1ea7809157c71
SHA1

47b038e675fa09773ca0cccfb4cda9f5bea86128
SHA256

177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335
SHA512

fbf378a1ad1e5c55a14cfe83ca80d0f682955346923c137bd4d4dafb6e35a486fe5638d452d2524fe49fce6baf427a068ac95ebca3217d4cc0d528df8e63629e
SSDEEP

12288:PFUNDaRIId79EaUTvwieMozMEcOigSpuPMaLiuY:PFOamIdqaWw1MsbTScPC

Score

10^/10

evasion persistence

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-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Executes dropped EXE 7 IoCs

pid	Process
1968	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
1120	Process not Found
2036	icsys.icn.exe
2628	explorer.exe
2540	spoolsv.exe
2680	svchost.exe
2552	spoolsv.exe

Loads dropped DLL 7 IoCs

pid	Process
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
1120	Process not Found
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2036	icsys.icn.exe
2628	explorer.exe
2540	spoolsv.exe
2680	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	explorer.exe
File opened for modification	C:\Windows\SysWOW64\explorer.exe	svchost.exe

Drops file in Windows directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Resources\Themes\icsys.icn.exe	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
File opened for modification	C:\Windows\DPINST.LOG	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.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
File opened for modification	C:\Windows\Resources\tjud.exe	explorer.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
2460	schtasks.exe
896	schtasks.exe
1400	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2680	svchost.exe
2680	svchost.exe
2680	svchost.exe
2680	svchost.exe
2680	svchost.exe
2680	svchost.exe
2680	svchost.exe
2680	svchost.exe
2680	svchost.exe
2680	svchost.exe
2680	svchost.exe
2680	svchost.exe
2680	svchost.exe
2680	svchost.exe
2680	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2628	explorer.exe
2680	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
2036	icsys.icn.exe
2036	icsys.icn.exe
2628	explorer.exe
2628	explorer.exe
2540	spoolsv.exe
2540	spoolsv.exe
2680	svchost.exe
2680	svchost.exe
2552	spoolsv.exe
2552	spoolsv.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 2080 wrote to memory of 1968	2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe	28
PID 2080 wrote to memory of 1968	2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe	28
PID 2080 wrote to memory of 1968	2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe	28
PID 2080 wrote to memory of 1968	2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe	28
PID 2080 wrote to memory of 2036	2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe	29
PID 2080 wrote to memory of 2036	2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe	29
PID 2080 wrote to memory of 2036	2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe	29
PID 2080 wrote to memory of 2036	2080	177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe	29
PID 2036 wrote to memory of 2628	2036	icsys.icn.exe	30
PID 2036 wrote to memory of 2628	2036	icsys.icn.exe	30
PID 2036 wrote to memory of 2628	2036	icsys.icn.exe	30
PID 2036 wrote to memory of 2628	2036	icsys.icn.exe	30
PID 2628 wrote to memory of 2540	2628	explorer.exe	31
PID 2628 wrote to memory of 2540	2628	explorer.exe	31
PID 2628 wrote to memory of 2540	2628	explorer.exe	31
PID 2628 wrote to memory of 2540	2628	explorer.exe	31
PID 2540 wrote to memory of 2680	2540	spoolsv.exe	32
PID 2540 wrote to memory of 2680	2540	spoolsv.exe	32
PID 2540 wrote to memory of 2680	2540	spoolsv.exe	32
PID 2540 wrote to memory of 2680	2540	spoolsv.exe	32
PID 2680 wrote to memory of 2552	2680	svchost.exe	33
PID 2680 wrote to memory of 2552	2680	svchost.exe	33
PID 2680 wrote to memory of 2552	2680	svchost.exe	33
PID 2680 wrote to memory of 2552	2680	svchost.exe	33
PID 2628 wrote to memory of 2428	2628	explorer.exe	34
PID 2628 wrote to memory of 2428	2628	explorer.exe	34
PID 2628 wrote to memory of 2428	2628	explorer.exe	34
PID 2628 wrote to memory of 2428	2628	explorer.exe	34
PID 2680 wrote to memory of 2460	2680	svchost.exe	35
PID 2680 wrote to memory of 2460	2680	svchost.exe	35
PID 2680 wrote to memory of 2460	2680	svchost.exe	35
PID 2680 wrote to memory of 2460	2680	svchost.exe	35
PID 2680 wrote to memory of 896	2680	svchost.exe	40
PID 2680 wrote to memory of 896	2680	svchost.exe	40
PID 2680 wrote to memory of 896	2680	svchost.exe	40
PID 2680 wrote to memory of 896	2680	svchost.exe	40
PID 2680 wrote to memory of 1400	2680	svchost.exe	42
PID 2680 wrote to memory of 1400	2680	svchost.exe	42
PID 2680 wrote to memory of 1400	2680	svchost.exe	42
PID 2680 wrote to memory of 1400	2680	svchost.exe	42

C:\Users\Admin\AppData\Local\Temp\177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
"C:\Users\Admin\AppData\Local\Temp\177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2080
- \??\c:\users\admin\appdata\local\temp\177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
  c:\users\admin\appdata\local\temp\177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe
  2⤵
  - Executes dropped EXE
  - Drops file in Windows directory
  PID:1968
- 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
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2036
- - \??\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
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2628
  - - \??\c:\windows\resources\spoolsv.exe
      c:\windows\resources\spoolsv.exe SE
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Drops file in Windows directory
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2540
    - - \??\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
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:2680
      - \??\c:\windows\resources\spoolsv.exe
        
        c:\windows\resources\spoolsv.exe PR
        6⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:2552
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 19:12 /f
        6⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:2460
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 19:13 /f
        6⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:896
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 19:14 /f
        6⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:1400
  - - C:\Windows\Explorer.exe
      C:\Windows\Explorer.exe
      4⤵
      PID:2428

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
135KB

MD5
e6b8fefe1f62ddd65b7cae024c5a0709

SHA1
86ba07c118593cc54fdccffa8b907dfcf5f0ff47

SHA256
78a5b01b221a12de9dbdd8e308391622b8c387149a22ad5a7c3f42521d98183a

SHA512
e710b407863b873100f8828f9adc07a3e9b6dc001345707e4eea82bd5365d41da9bee5ac416117a8550dbe6fc0c176e70bed38c5284428bac75d316d862ae9b4

Download Submit
\Users\Admin\AppData\Local\Temp\177620cdffb05d31ba4029090db11ba9893b52b3c90d3e43215da23021508335.exe

Filesize
1.0MB

MD5
be3c79033fa8302002d9d3a6752f2263

SHA1
a01147731f2e500282eca5ece149bcc5423b59d6

SHA256
181bf85d3b5900ff8abed34bc415afc37fc322d9d7702e14d144f96a908f5cab

SHA512
77097f220cc6d22112b314d3e42b6eedb9ccd72beb655b34656326c2c63fb9209977ddac20e9c53c4ec7ccc8ea6910f400f050f4b0cb98c9f42f89617965aaea

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

Filesize
135KB

MD5
1b8871273205e59a99320c62575aa852

SHA1
303124842dd4f41ab5e443506274338afc793c55

SHA256
37816cf2642831ba0b9c1a0ba0a02ac6f2bd89cc4d7b8413f1b9d78283497c7a

SHA512
4a977a3f2279828d7c5e8be8a1ef3b21e8f793987a632d6440eb52e9f5e14356e66eac835ed2745fd2754f08f5ee2ecf862e2c4a88305ed86c00e286e0b91a8c

Download Submit
\Windows\Resources\spoolsv.exe

Filesize
135KB

MD5
12c02ab2bd52ab5ad273de4fc85fc909

SHA1
ce7d7f9957989eb42f60b705961a2f6f54171052

SHA256
1fd04faf340454547299b7e22adaf50518b5fb189f1d21562237281e5da3e3e6

SHA512
6fc29c49dae5f0ce3705d2d19611414688d3d0f074710ea95a2759b1bf10b6da66e9c84557259c8c3897b7d9b3e1227aa2ec7bc0332735ed744a9f50b637a341

Download Submit
\Windows\Resources\svchost.exe

Filesize
135KB

MD5
939c8883746f222f5d0467ab316687d3

SHA1
b8f1192231d982279b40d74ba363b19ff674020e

SHA256
491a47b06511b30eae1a2f86b63b4f801053a759e471c58b56000a427568020c

SHA512
6171ee94228bc3f91fadeb4c1b989816ca11e96011345ea7b7c2fdad2994f70951b76c3ec7c758f7aa1ad0acac4367203ff9cb530e2c49fb2d7c2b08052307b2

Download Submit
memory/2036-60-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2036-26-0x0000000000500000-0x000000000051F000-memory.dmp

Filesize
124KB

Download
memory/2080-13-0x00000000005C0000-0x00000000005DF000-memory.dmp

Filesize
124KB

Download
memory/2080-0-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2080-61-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2540-59-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2552-58-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2680-49-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2680-54-0x00000000002B0000-0x00000000002CF000-memory.dmp

Filesize
124KB

Download