b2f7747906ee0160379be2a3111a9a93c09a32969146cfc5c0d3479db988c43a

Analysis

max time kernel
150s
max time network
105s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
04/06/2024, 01:45

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
b2f7747906ee0160379be2a3111a9a93c09a32969146cfc5c0d3479db988c43a.exe
Size 65KB
Sample240604-b6tt8sha9v
SHA256 b2f7747906ee0160379be2a3111a9a93c09a32969146cfc5c0d3479db988c43a
MD5 4e1ef4e737e1c12e704971072c636d95
SHA1 20f57ec22050a48eb0e3c8b07cc5b713b52ee41a
SHA512 cfe399b99155744cfc54f1b6e57b9b2ca79ec4d3f5897f90fdd18ddec9b5df767364000a6470a90fb94c0bc5c91c203f362dab5869df2e3343409a211ffddd86
SSDEEP 1536:ECq3yRuqrI01eArdW/O7JnI2e13XiLij40MkTUVqa/OuH:7WNqkOJWmo1HpM0MkTUmuH
MD5 SHA1 SHA512 SSDEEP

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-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\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 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
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

Executes dropped EXE 4 IoCs

pid	Process
4520	explorer.exe
1248	spoolsv.exe
3672	svchost.exe
2920	spoolsv.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\svchost.exe	svchost.exe
File opened for modification	C:\Windows\system\udsys.exe	explorer.exe
File opened for modification	\??\c:\windows\system\explorer.exe	b2f7747906ee0160379be2a3111a9a93c09a32969146cfc5c0d3479db988c43a.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

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
4480	b2f7747906ee0160379be2a3111a9a93c09a32969146cfc5c0d3479db988c43a.exe
4480	b2f7747906ee0160379be2a3111a9a93c09a32969146cfc5c0d3479db988c43a.exe
4520	explorer.exe
4520	explorer.exe
4520	explorer.exe
4520	explorer.exe
4520	explorer.exe
4520	explorer.exe
3672	svchost.exe
3672	svchost.exe
3672	svchost.exe
3672	svchost.exe
4520	explorer.exe
4520	explorer.exe
3672	svchost.exe
3672	svchost.exe
4520	explorer.exe
4520	explorer.exe
3672	svchost.exe
3672	svchost.exe
4520	explorer.exe
4520	explorer.exe
3672	svchost.exe
3672	svchost.exe
4520	explorer.exe
4520	explorer.exe
3672	svchost.exe
3672	svchost.exe
4520	explorer.exe
4520	explorer.exe
3672	svchost.exe
3672	svchost.exe
4520	explorer.exe
4520	explorer.exe
3672	svchost.exe
3672	svchost.exe
4520	explorer.exe
4520	explorer.exe
3672	svchost.exe
3672	svchost.exe
4520	explorer.exe
4520	explorer.exe
3672	svchost.exe
3672	svchost.exe
4520	explorer.exe
4520	explorer.exe
3672	svchost.exe
3672	svchost.exe
4520	explorer.exe
4520	explorer.exe
3672	svchost.exe
3672	svchost.exe
4520	explorer.exe
4520	explorer.exe
3672	svchost.exe
3672	svchost.exe
4520	explorer.exe
4520	explorer.exe
3672	svchost.exe
3672	svchost.exe
4520	explorer.exe
4520	explorer.exe
3672	svchost.exe
3672	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
4520	explorer.exe
3672	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
4480	b2f7747906ee0160379be2a3111a9a93c09a32969146cfc5c0d3479db988c43a.exe
4480	b2f7747906ee0160379be2a3111a9a93c09a32969146cfc5c0d3479db988c43a.exe
4520	explorer.exe
4520	explorer.exe
1248	spoolsv.exe
1248	spoolsv.exe
3672	svchost.exe
3672	svchost.exe
2920	spoolsv.exe
2920	spoolsv.exe
4520	explorer.exe
4520	explorer.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 4480 wrote to memory of 4520	4480	b2f7747906ee0160379be2a3111a9a93c09a32969146cfc5c0d3479db988c43a.exe	84
PID 4480 wrote to memory of 4520	4480	b2f7747906ee0160379be2a3111a9a93c09a32969146cfc5c0d3479db988c43a.exe	84
PID 4480 wrote to memory of 4520	4480	b2f7747906ee0160379be2a3111a9a93c09a32969146cfc5c0d3479db988c43a.exe	84
PID 4520 wrote to memory of 1248	4520	explorer.exe	85
PID 4520 wrote to memory of 1248	4520	explorer.exe	85
PID 4520 wrote to memory of 1248	4520	explorer.exe	85
PID 1248 wrote to memory of 3672	1248	spoolsv.exe	86
PID 1248 wrote to memory of 3672	1248	spoolsv.exe	86
PID 1248 wrote to memory of 3672	1248	spoolsv.exe	86
PID 3672 wrote to memory of 2920	3672	svchost.exe	87
PID 3672 wrote to memory of 2920	3672	svchost.exe	87
PID 3672 wrote to memory of 2920	3672	svchost.exe	87
PID 3672 wrote to memory of 2364	3672	svchost.exe	88
PID 3672 wrote to memory of 2364	3672	svchost.exe	88
PID 3672 wrote to memory of 2364	3672	svchost.exe	88
PID 3672 wrote to memory of 4128	3672	svchost.exe	106
PID 3672 wrote to memory of 4128	3672	svchost.exe	106
PID 3672 wrote to memory of 4128	3672	svchost.exe	106
PID 3672 wrote to memory of 3964	3672	svchost.exe	115
PID 3672 wrote to memory of 3964	3672	svchost.exe	115
PID 3672 wrote to memory of 3964	3672	svchost.exe	115

C:\Users\Admin\AppData\Local\Temp\b2f7747906ee0160379be2a3111a9a93c09a32969146cfc5c0d3479db988c43a.exe
"C:\Users\Admin\AppData\Local\Temp\b2f7747906ee0160379be2a3111a9a93c09a32969146cfc5c0d3479db988c43a.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4480
- \??\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
  - 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:4520
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1248
  - - \??\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
      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:3672
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:2920
    - - C:\Windows\SysWOW64\at.exe
        
        at 01:47 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:2364
    - - C:\Windows\SysWOW64\at.exe
        
        at 01:48 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:4128
    - - C:\Windows\SysWOW64\at.exe
        
        at 01:49 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:3964

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

Loading Replay Monitor...

Downloads

mrsys.exe

Path C:\Users\Admin\AppData\Roaming\mrsys.exe
Size 65KB
SHA256 46ede9588985fc2b84c1d205fde45b141b9e0efb7227003117afb3230488e936
MD5 e3ac39b44414e5ba264b4deb4e079a71
SHA1 4f16ea9f431703dfd261a3ee6229e22acd04086d
SHA512 2fccfc7fac58b622cc6bd1e74e89cf26203a53db8121b2be5697818f4b7a14075550221c0dde8891cba180bb924024e1ed5680526ad46be5c201ae482f9caaef
SSDEEP 1536:ECq3yRuqrI01eArdW/O7JnI2e13XiLij40MkTUVqa/OuC:7WNqkOJWmo1HpM0MkTUmuC
MD5 SHA1 SHA512 SSDEEP

Submit Download

explorer.exe

Path C:\Windows\System\explorer.exe
Size 65KB
SHA256 600b3a270e116d17b52dfdb4e9d136d4aeedf606a25cf358d49bfae826f3da71
MD5 15466660aa46de21251787df95944691
SHA1 04a1a3bc0bf54e665abfc73128119da1c57c4917
SHA512 b4547a01b91929a0c2167894e13644823261d0e4a1e527577bd630ce6fdc10671c1745a356b6bd2962defca0c5b1574f8f367e9ec8cbacde8958171972d6288a
SSDEEP 1536:ECq3yRuqrI01eArdW/O7JnI2e13XiLij40MkTUVqa/Oup:7WNqkOJWmo1HpM0MkTUmup
MD5 SHA1 SHA512 SSDEEP

Submit Download

spoolsv.exe

Path C:\Windows\System\spoolsv.exe
Size 65KB
SHA256 e8342600197d85a660013d1cc84031327292948347634692df824ac7014ce481
MD5 3c761df72e3ca9bb26589ec08aacea9e
SHA1 e39e6e1bfef1ceda775e29d9ad8e97bb09e59b1a
SHA512 fb317c753d04a819fdcd9f38329cffea85fb74053013d194e542372779f959e135a727ba349b520f4ae74a3d33c3ecb1246caa64eb7464ae2d4796cf8f00d3ba
SSDEEP 1536:ECq3yRuqrI01eArdW/O7JnI2e13XiLij40MkTUVqa/OuOcccccccccccccccccc3:7WNqkOJWmo1HpM0MkTUmu8
MD5 SHA1 SHA512 SSDEEP

Submit Download

svchost.exe

Path C:\Windows\System\svchost.exe
Size 65KB
SHA256 c9323cfde5a22f166c151671313fb21f5eff8a96abc473d46c5926e77d2c115e
MD5 ac4f2d91a356e7b7ff4e43b311c26978
SHA1 d9e1ee85fb0e271321e571e796f220187ac83dd8
SHA512 7e948ad70827326a9160dff28d7f96316400d3b656b6004d161df6e857070b0fb283a470279e2e1e50f566851da97d251654dde6884b466d39f7750d00280519
SSDEEP 1536:ECq3yRuqrI01eArdW/O7JnI2e13XiLij40MkTUVqa/OuI:7WNqkOJWmo1HpM0MkTUmuI
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1248-26-0x0000000074F60000-0x00000000750BD000-memory.dmp

Download

memory/1248-53-0x0000000000400000-0x0000000000431000-memory.dmp

Download

memory/1248-31-0x0000000000400000-0x0000000000431000-memory.dmp

Download

memory/2920-51-0x0000000000400000-0x0000000000431000-memory.dmp

Download

memory/2920-43-0x0000000074F60000-0x00000000750BD000-memory.dmp

Download

memory/3672-60-0x0000000000400000-0x0000000000431000-memory.dmp

Download

memory/3672-37-0x0000000074F60000-0x00000000750BD000-memory.dmp

Download

memory/4480-56-0x0000000000401000-0x000000000042E000-memory.dmp

Download

memory/4480-5-0x0000000000401000-0x000000000042E000-memory.dmp

Download

memory/4480-2-0x0000000074F60000-0x00000000750BD000-memory.dmp

Download

memory/4480-1-0x00000000001C0000-0x00000000001C4000-memory.dmp

Download

memory/4480-3-0x0000000000400000-0x0000000000431000-memory.dmp

Download

memory/4480-55-0x0000000000400000-0x0000000000431000-memory.dmp

Download

memory/4480-0-0x0000000000400000-0x0000000000431000-memory.dmp

Download

memory/4520-17-0x0000000000400000-0x0000000000431000-memory.dmp

Download

memory/4520-15-0x0000000074F60000-0x00000000750BD000-memory.dmp

Download

memory/4520-14-0x0000000000400000-0x0000000000431000-memory.dmp

Download

memory/4520-13-0x0000000000400000-0x0000000000431000-memory.dmp

Download

memory/4520-58-0x0000000000400000-0x0000000000431000-memory.dmp

Download

memory/4520-69-0x0000000000400000-0x0000000000431000-memory.dmp

Download