3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30

Analysis

max time kernel
150s
max time network
120s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
29-05-2024 20:35

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General

Target

3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe
Size

65KB
MD5

ca3803799e2756c25418d591cd8ee1f3
SHA1

4f573f5eaec79200c67dcffbe356810fd1e019ab
SHA256

3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30
SHA512

767328e4e27188e4c22d82210f22dc959f5ecedabe60c61d44896440d03d17f3ca2e59b6e88777a24d7e023762f1d850f3a1d8092e88b87a35fa5b36cb249e17
SSDEEP

1536:ECq3yRuqrI01eArdW/O7JnI2e13XiLij40MkTUVqa/Ouw:7WNqkOJWmo1HpM0MkTUmuw

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	svchost.exe

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-1-5-21-3691908287-3775019229-3534252667-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3691908287-3775019229-3534252667-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Modifies Installed Components in the registry 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	svchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	svchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	explorer.exe

Executes dropped EXE 4 IoCs

pid	Process
1872	explorer.exe
2816	spoolsv.exe
2828	svchost.exe
2560	spoolsv.exe

Loads dropped DLL 8 IoCs

pid	Process
2024	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe
2024	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe
1872	explorer.exe
1872	explorer.exe
2816	spoolsv.exe
2816	spoolsv.exe
2828	svchost.exe
2828	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\\system\\explorer.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\system\\explorer.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	svchost.exe

Drops file in Windows directory 6 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\system\explorer.exe	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe
File opened for modification	\??\c:\windows\system\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	spoolsv.exe
File opened for modification	\??\c:\windows\system\explorer.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	svchost.exe
File opened for modification	C:\Windows\system\udsys.exe	explorer.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2024	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe
1872	explorer.exe
1872	explorer.exe
1872	explorer.exe
2828	svchost.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe
1872	explorer.exe
2828	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
1872	explorer.exe
2828	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2024	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe
2024	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe
1872	explorer.exe
1872	explorer.exe
2816	spoolsv.exe
2816	spoolsv.exe
2828	svchost.exe
2828	svchost.exe
2560	spoolsv.exe
2560	spoolsv.exe
1872	explorer.exe
1872	explorer.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2024 wrote to memory of 1872	2024	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe	28
PID 2024 wrote to memory of 1872	2024	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe	28
PID 2024 wrote to memory of 1872	2024	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe	28
PID 2024 wrote to memory of 1872	2024	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe	28
PID 1872 wrote to memory of 2816	1872	explorer.exe	29
PID 1872 wrote to memory of 2816	1872	explorer.exe	29
PID 1872 wrote to memory of 2816	1872	explorer.exe	29
PID 1872 wrote to memory of 2816	1872	explorer.exe	29
PID 2816 wrote to memory of 2828	2816	spoolsv.exe	30
PID 2816 wrote to memory of 2828	2816	spoolsv.exe	30
PID 2816 wrote to memory of 2828	2816	spoolsv.exe	30
PID 2816 wrote to memory of 2828	2816	spoolsv.exe	30
PID 2828 wrote to memory of 2560	2828	svchost.exe	31
PID 2828 wrote to memory of 2560	2828	svchost.exe	31
PID 2828 wrote to memory of 2560	2828	svchost.exe	31
PID 2828 wrote to memory of 2560	2828	svchost.exe	31
PID 2828 wrote to memory of 2136	2828	svchost.exe	32
PID 2828 wrote to memory of 2136	2828	svchost.exe	32
PID 2828 wrote to memory of 2136	2828	svchost.exe	32
PID 2828 wrote to memory of 2136	2828	svchost.exe	32
PID 2828 wrote to memory of 1328	2828	svchost.exe	36
PID 2828 wrote to memory of 1328	2828	svchost.exe	36
PID 2828 wrote to memory of 1328	2828	svchost.exe	36
PID 2828 wrote to memory of 1328	2828	svchost.exe	36
PID 2828 wrote to memory of 2844	2828	svchost.exe	38
PID 2828 wrote to memory of 2844	2828	svchost.exe	38
PID 2828 wrote to memory of 2844	2828	svchost.exe	38
PID 2828 wrote to memory of 2844	2828	svchost.exe	38

C:\Users\Admin\AppData\Local\Temp\3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe
"C:\Users\Admin\AppData\Local\Temp\3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2024
- \??\c:\windows\system\explorer.exe
  c:\windows\system\explorer.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visiblity of hidden/system files in Explorer
  - Modifies Installed Components in the registry
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1872
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in Windows directory
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2816
  - - \??\c:\windows\system\svchost.exe
      c:\windows\system\svchost.exe
      4⤵
      Modifies WinLogon for persistence
      Modifies visiblity of hidden/system files in Explorer
      Modifies Installed Components in the registry
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2828
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:2560
    - - C:\Windows\SysWOW64\at.exe
        
        at 20:37 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:2136
    - - C:\Windows\SysWOW64\at.exe
        
        at 20:38 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:1328
    - - C:\Windows\SysWOW64\at.exe
        
        at 20:39 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:2844

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

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\mrsys.exe

Filesize
65KB

MD5
3aa6388e08eb5170bafce8da5406e204

SHA1
0675f245254311f7af2cd5f5c76cdd9cedb93801

SHA256
2b4dc8c1739b4cb8b052b223780aab7ce5d53f894324148018f70c0e31f40be7

SHA512
b3db34e3c2666688ef9414ad9111719f868ad23b3233d7796c284bdc5638e16cf8cd702686cc43db048f215d9ca9858a9a34bb232c3dd119e7012a63f440786b

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

Filesize
65KB

MD5
3ef97e0d294bda7f2b5c39c05c49c950

SHA1
9224c5124e8d356d8ec60781b947a14ac8282ddb

SHA256
c6b8b31f9bfeb8e707ebe2c10d812b8b15448297e3834c68c35dec8ea3b34806

SHA512
8cbc631ba12c73ec3641882c29fbe2bdaf76aa4cf960ae4a2d9d6e02a583bb60c7cae15205f664c993c744de2bd5194a649feec76a3bcd430fa21283f0d8d633

Download Submit
\Windows\system\explorer.exe

Filesize
65KB

MD5
7ee0e27dfa476fd5f0f015d89e365474

SHA1
0284a80b5423d62f2b484b67869af9b9dd7dfd91

SHA256
6ca5fb0f30f02dd0ea73b03e1538761ff2d725f727bb1a51f0b8cb9b7d11f63f

SHA512
9eb98f9a767eb2aa4f36bdcc7f7bf9d3bd058ad9ce5a0540cdcd0e53317d1086225cb28522142c030448fdec3b1ebedbe5de09b712a817758df5a009eac7226c

Download Submit
\Windows\system\spoolsv.exe

Filesize
65KB

MD5
59eb8fbcde968cf027f6f5f753866c3f

SHA1
a38350571e3c89ec42eb53607619a99fd729db9c

SHA256
2aab33ff48db328ed91cc5674b28f85db8133d6e0310947fda6f0669f7c1abf3

SHA512
3727b8567ca31f96b0fea2b4e5624af9b381d2d4396f194fe8f0bf8360662387786f24e297aeed2f7eaffaee6cab921725b5ae5c27ee9477a54660c39169b8b3

Download Submit
memory/1872-20-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/1872-94-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1872-40-0x0000000002670000-0x00000000026A1000-memory.dmp

Filesize
196KB

Download
memory/1872-19-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1872-83-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1872-22-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2024-18-0x0000000002840000-0x0000000002871000-memory.dmp

Filesize
196KB

Download
memory/2024-5-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/2024-3-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2024-66-0x0000000000020000-0x0000000000024000-memory.dmp

Filesize
16KB

Download
memory/2024-2-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/2024-12-0x0000000002840000-0x0000000002871000-memory.dmp

Filesize
196KB

Download
memory/2024-0-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2024-80-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2024-81-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/2024-1-0x0000000000020000-0x0000000000024000-memory.dmp

Filesize
16KB

Download
memory/2560-74-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2560-68-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/2816-76-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2816-54-0x0000000001D40000-0x0000000001D71000-memory.dmp

Filesize
196KB

Download
memory/2816-36-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/2816-41-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2816-43-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2828-60-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2828-67-0x0000000001ED0000-0x0000000001F01000-memory.dmp

Filesize
196KB

Download
memory/2828-56-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/2828-55-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2828-85-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download