cc50f507bea9f2fab321c2922ae853baf63bce10070c0fe94b25ff9219e167ca

Analysis

max time kernel
120s
max time network
17s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
29/08/2024, 04:16

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General

Target

c7992e77f55d3694d6ed0abb1f982140N.exe
Size

144KB
MD5

c7992e77f55d3694d6ed0abb1f982140
SHA1

a6d97c519c6704eb6106d77ec5f0be368f8e6705
SHA256

cc50f507bea9f2fab321c2922ae853baf63bce10070c0fe94b25ff9219e167ca
SHA512

115ac7ad40376935d9dac17c0a00b271a7d364f2d3d719bbba035a040a678bd0c395abdcd8aa1e0b8adf958b3d1039cfda7b9d9c9c55cc5bfd87d64de46524b8
SSDEEP

1536:NTVK3P8+agjVr+IIexF9u3LcVH9ctz7DOEtOKA+ZKx65LIctBBvTt:5VK3P8jgAIPxF9u73tvDoAKx6l5BBvp

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-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Executes dropped EXE 4 IoCs

pid	Process
2044	explorer.exe
1128	spoolsv.exe
2872	svchost.exe
2752	spoolsv.exe

Loads dropped DLL 8 IoCs

pid	Process
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
2044	explorer.exe
2044	explorer.exe
1128	spoolsv.exe
1128	spoolsv.exe
2872	svchost.exe
2872	svchost.exe

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1736-0-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral1/files/0x0009000000015d5f-6.dat	upx
behavioral1/files/0x0009000000015d9c-20.dat	upx
behavioral1/memory/1128-28-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral1/files/0x0008000000015e4e-35.dat	upx
behavioral1/memory/1736-48-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral1/memory/2752-55-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral1/memory/1128-56-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral1/memory/1736-57-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral1/memory/2044-58-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral1/memory/2872-59-0x0000000000400000-0x0000000000423000-memory.dmp	upx

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 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\resources\themes\explorer.exe	c7992e77f55d3694d6ed0abb1f982140N.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

System Location Discovery: System Language Discovery 1 TTPs 7 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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c7992e77f55d3694d6ed0abb1f982140N.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	schtasks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2716	schtasks.exe
2124	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
2044	explorer.exe
2044	explorer.exe
2044	explorer.exe
2044	explorer.exe
2044	explorer.exe
2044	explorer.exe
2044	explorer.exe
2044	explorer.exe
2044	explorer.exe
2044	explorer.exe
2044	explorer.exe
2044	explorer.exe
2044	explorer.exe
2044	explorer.exe
2044	explorer.exe
2044	explorer.exe
2872	svchost.exe
2872	svchost.exe
2872	svchost.exe
2872	svchost.exe
2872	svchost.exe
2872	svchost.exe
2872	svchost.exe
2872	svchost.exe
2872	svchost.exe
2872	svchost.exe
2872	svchost.exe
2872	svchost.exe
2872	svchost.exe
2872	svchost.exe
2872	svchost.exe
2872	svchost.exe
2044	explorer.exe
2872	svchost.exe
2872	svchost.exe
2044	explorer.exe
2044	explorer.exe
2872	svchost.exe
2044	explorer.exe
2872	svchost.exe
2044	explorer.exe
2872	svchost.exe
2044	explorer.exe
2044	explorer.exe
2872	svchost.exe
2872	svchost.exe
2044	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2872	svchost.exe
2044	explorer.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
1736	c7992e77f55d3694d6ed0abb1f982140N.exe
2044	explorer.exe
2044	explorer.exe
1128	spoolsv.exe
1128	spoolsv.exe
2872	svchost.exe
2872	svchost.exe
2752	spoolsv.exe
2752	spoolsv.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1736 wrote to memory of 2044	1736	c7992e77f55d3694d6ed0abb1f982140N.exe	30
PID 1736 wrote to memory of 2044	1736	c7992e77f55d3694d6ed0abb1f982140N.exe	30
PID 1736 wrote to memory of 2044	1736	c7992e77f55d3694d6ed0abb1f982140N.exe	30
PID 1736 wrote to memory of 2044	1736	c7992e77f55d3694d6ed0abb1f982140N.exe	30
PID 2044 wrote to memory of 1128	2044	explorer.exe	31
PID 2044 wrote to memory of 1128	2044	explorer.exe	31
PID 2044 wrote to memory of 1128	2044	explorer.exe	31
PID 2044 wrote to memory of 1128	2044	explorer.exe	31
PID 1128 wrote to memory of 2872	1128	spoolsv.exe	32
PID 1128 wrote to memory of 2872	1128	spoolsv.exe	32
PID 1128 wrote to memory of 2872	1128	spoolsv.exe	32
PID 1128 wrote to memory of 2872	1128	spoolsv.exe	32
PID 2872 wrote to memory of 2752	2872	svchost.exe	33
PID 2872 wrote to memory of 2752	2872	svchost.exe	33
PID 2872 wrote to memory of 2752	2872	svchost.exe	33
PID 2872 wrote to memory of 2752	2872	svchost.exe	33
PID 2044 wrote to memory of 2880	2044	explorer.exe	34
PID 2044 wrote to memory of 2880	2044	explorer.exe	34
PID 2044 wrote to memory of 2880	2044	explorer.exe	34
PID 2044 wrote to memory of 2880	2044	explorer.exe	34
PID 2872 wrote to memory of 2716	2872	svchost.exe	35
PID 2872 wrote to memory of 2716	2872	svchost.exe	35
PID 2872 wrote to memory of 2716	2872	svchost.exe	35
PID 2872 wrote to memory of 2716	2872	svchost.exe	35
PID 2872 wrote to memory of 2124	2872	svchost.exe	38
PID 2872 wrote to memory of 2124	2872	svchost.exe	38
PID 2872 wrote to memory of 2124	2872	svchost.exe	38
PID 2872 wrote to memory of 2124	2872	svchost.exe	38

C:\Users\Admin\AppData\Local\Temp\c7992e77f55d3694d6ed0abb1f982140N.exe
"C:\Users\Admin\AppData\Local\Temp\c7992e77f55d3694d6ed0abb1f982140N.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:1736
- \??\c:\windows\resources\themes\explorer.exe
  c:\windows\resources\themes\explorer.exe
  2⤵
  - 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:2044
- - \??\c:\windows\resources\spoolsv.exe
    c:\windows\resources\spoolsv.exe SE
    3⤵
    - 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:1128
  - - \??\c:\windows\resources\svchost.exe
      c:\windows\resources\svchost.exe
      4⤵
      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:2872
    - - \??\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:2752
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 04:18 /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2716
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 04:19 /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2124
- - C:\Windows\Explorer.exe
    C:\Windows\Explorer.exe
    3⤵
    PID:2880

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

\Windows\Resources\Themes\explorer.exe

Filesize
144KB

MD5
6144c697de98f35f0354eaef83b0cdf8

SHA1
675ff7f3bf8c14aa3b4234f0ff526f19a8a06200

SHA256
80cefc89a19e028a183e2d3b09b5ac5c8035e1f353863fd021f06439217bd8ce

SHA512
defb158ed730af60daaaa2a3957be85988a86991215d186cd24b04da605557d93f9effeecf9b0714f562f4d083b265edae2d4099724f95b283dfb66655f169d2

Download Submit
\Windows\Resources\spoolsv.exe

Filesize
144KB

MD5
05664f2e2cfabb3cc98d7dfc016bab9e

SHA1
0f2ee1df45a6a2f58a9fad511149d0da273f1050

SHA256
eab330b624ca047ba1a0a3e644d89d937eb790d2fa37db0f5a02cc2b3095596d

SHA512
7e731fb8fbe4d28436ed0ee78996da29f745a81ad1268dddd8313764a1c1f6cf7af7d16297064f7658c95fed4f9ff81cca5b887bab554ff457632d6728c0e88e

Download Submit
\Windows\Resources\svchost.exe

Filesize
144KB

MD5
b61bbefe6381d746f9d50a24eb3b0be4

SHA1
e58848ec0c4456472fb0bef970f512340739c73b

SHA256
9706305601d2b70083503750ffa622ad74abd91898ae9a972dbb60f89210e7d5

SHA512
59eff16629a70e456234d0cbf2351dc68a2c60cc878ddac21b44e1295eef3c6673510153be51bc6127d38416ec1970895a6777b13ab1d916fa134ae7a3fe3371

Download Submit
memory/1128-28-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/1128-41-0x0000000000320000-0x0000000000343000-memory.dmp

Filesize
140KB

Download
memory/1128-56-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/1736-12-0x0000000000290000-0x00000000002B3000-memory.dmp

Filesize
140KB

Download
memory/1736-0-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/1736-48-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/1736-51-0x0000000000290000-0x00000000002B3000-memory.dmp

Filesize
140KB

Download
memory/1736-57-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/2044-27-0x00000000003D0000-0x00000000003F3000-memory.dmp

Filesize
140KB

Download
memory/2044-58-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/2752-55-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/2872-59-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download