73baa056e40cfba5ff9da552c2b2311dd8442712904d33185dbbbba39b6bf82b

Analysis

max time kernel
150s
max time network
121s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
31-05-2024 23:14

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General

Target

73baa056e40cfba5ff9da552c2b2311dd8442712904d33185dbbbba39b6bf82b.exe
Size

66KB
MD5

93952a80aebecd034262a8de55fcfc3d
SHA1

832498327f4fbcc16f4ed14c4707d6e40b786b3f
SHA256

73baa056e40cfba5ff9da552c2b2311dd8442712904d33185dbbbba39b6bf82b
SHA512

07e82fec0cea719b230a443baf5ee0d98e15226c9012575c4597bc38756def099a003f3cd1abe8726abbc1e98217415dcd9b5ede0d06faf3a3fb395fb0bb44b2
SSDEEP

1536:EHfetdklPp+07gDSrB8Xru2zGeJxgawTzpXzrDJrXiO:IeklMMYJhqezw/pXzH9iO

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-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\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\{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
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

Executes dropped EXE 4 IoCs

pid	Process
2932	explorer.exe
2712	spoolsv.exe
2612	svchost.exe
2420	spoolsv.exe

Loads dropped DLL 8 IoCs

pid	Process
2344	73baa056e40cfba5ff9da552c2b2311dd8442712904d33185dbbbba39b6bf82b.exe
2344	73baa056e40cfba5ff9da552c2b2311dd8442712904d33185dbbbba39b6bf82b.exe
2932	explorer.exe
2932	explorer.exe
2712	spoolsv.exe
2712	spoolsv.exe
2612	svchost.exe
2612	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\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
File opened for modification	\??\c:\windows\system\explorer.exe	73baa056e40cfba5ff9da552c2b2311dd8442712904d33185dbbbba39b6bf82b.exe
File opened for modification	\??\c:\windows\system\spoolsv.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
2344	73baa056e40cfba5ff9da552c2b2311dd8442712904d33185dbbbba39b6bf82b.exe
2932	explorer.exe
2932	explorer.exe
2932	explorer.exe
2932	explorer.exe
2932	explorer.exe
2932	explorer.exe
2612	svchost.exe
2612	svchost.exe
2612	svchost.exe
2932	explorer.exe
2932	explorer.exe
2612	svchost.exe
2612	svchost.exe
2932	explorer.exe
2932	explorer.exe
2612	svchost.exe
2612	svchost.exe
2932	explorer.exe
2932	explorer.exe
2612	svchost.exe
2932	explorer.exe
2612	svchost.exe
2612	svchost.exe
2932	explorer.exe
2932	explorer.exe
2612	svchost.exe
2612	svchost.exe
2932	explorer.exe
2612	svchost.exe
2932	explorer.exe
2932	explorer.exe
2612	svchost.exe
2932	explorer.exe
2612	svchost.exe
2612	svchost.exe
2932	explorer.exe
2932	explorer.exe
2612	svchost.exe
2612	svchost.exe
2932	explorer.exe
2612	svchost.exe
2932	explorer.exe
2612	svchost.exe
2932	explorer.exe
2932	explorer.exe
2612	svchost.exe
2932	explorer.exe
2612	svchost.exe
2932	explorer.exe
2612	svchost.exe
2932	explorer.exe
2612	svchost.exe
2932	explorer.exe
2612	svchost.exe
2932	explorer.exe
2612	svchost.exe
2932	explorer.exe
2612	svchost.exe
2932	explorer.exe
2612	svchost.exe
2932	explorer.exe
2612	svchost.exe
2932	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2932	explorer.exe
2612	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2344	73baa056e40cfba5ff9da552c2b2311dd8442712904d33185dbbbba39b6bf82b.exe
2344	73baa056e40cfba5ff9da552c2b2311dd8442712904d33185dbbbba39b6bf82b.exe
2932	explorer.exe
2932	explorer.exe
2712	spoolsv.exe
2712	spoolsv.exe
2612	svchost.exe
2612	svchost.exe
2420	spoolsv.exe
2420	spoolsv.exe
2932	explorer.exe
2932	explorer.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2344 wrote to memory of 2932	2344	73baa056e40cfba5ff9da552c2b2311dd8442712904d33185dbbbba39b6bf82b.exe	28
PID 2344 wrote to memory of 2932	2344	73baa056e40cfba5ff9da552c2b2311dd8442712904d33185dbbbba39b6bf82b.exe	28
PID 2344 wrote to memory of 2932	2344	73baa056e40cfba5ff9da552c2b2311dd8442712904d33185dbbbba39b6bf82b.exe	28
PID 2344 wrote to memory of 2932	2344	73baa056e40cfba5ff9da552c2b2311dd8442712904d33185dbbbba39b6bf82b.exe	28
PID 2932 wrote to memory of 2712	2932	explorer.exe	29
PID 2932 wrote to memory of 2712	2932	explorer.exe	29
PID 2932 wrote to memory of 2712	2932	explorer.exe	29
PID 2932 wrote to memory of 2712	2932	explorer.exe	29
PID 2712 wrote to memory of 2612	2712	spoolsv.exe	30
PID 2712 wrote to memory of 2612	2712	spoolsv.exe	30
PID 2712 wrote to memory of 2612	2712	spoolsv.exe	30
PID 2712 wrote to memory of 2612	2712	spoolsv.exe	30
PID 2612 wrote to memory of 2420	2612	svchost.exe	31
PID 2612 wrote to memory of 2420	2612	svchost.exe	31
PID 2612 wrote to memory of 2420	2612	svchost.exe	31
PID 2612 wrote to memory of 2420	2612	svchost.exe	31
PID 2612 wrote to memory of 1480	2612	svchost.exe	32
PID 2612 wrote to memory of 1480	2612	svchost.exe	32
PID 2612 wrote to memory of 1480	2612	svchost.exe	32
PID 2612 wrote to memory of 1480	2612	svchost.exe	32
PID 2612 wrote to memory of 920	2612	svchost.exe	36
PID 2612 wrote to memory of 920	2612	svchost.exe	36
PID 2612 wrote to memory of 920	2612	svchost.exe	36
PID 2612 wrote to memory of 920	2612	svchost.exe	36
PID 2612 wrote to memory of 1256	2612	svchost.exe	38
PID 2612 wrote to memory of 1256	2612	svchost.exe	38
PID 2612 wrote to memory of 1256	2612	svchost.exe	38
PID 2612 wrote to memory of 1256	2612	svchost.exe	38

C:\Users\Admin\AppData\Local\Temp\73baa056e40cfba5ff9da552c2b2311dd8442712904d33185dbbbba39b6bf82b.exe
"C:\Users\Admin\AppData\Local\Temp\73baa056e40cfba5ff9da552c2b2311dd8442712904d33185dbbbba39b6bf82b.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2344
- \??\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:2932
- - \??\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:2712
  - - \??\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:2612
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:2420
    - - C:\Windows\SysWOW64\at.exe
        
        at 23:16 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:1480
    - - C:\Windows\SysWOW64\at.exe
        
        at 23:17 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:920
    - - C:\Windows\SysWOW64\at.exe
        
        at 23:18 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:1256

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
66KB

MD5
d9b268ac5451f97f530d38fd64128ee7

SHA1
2e1ab7421aa6c80169dab06058ab1329103249bc

SHA256
5d345ae5ff73d3649ca018e0961598224d969d13b88712c3b8bf509051584ba3

SHA512
556e192426280719cbadad35e096a073adcb85fd8045278d0e1d527311c28493f97004eaa43aa7f9aa475d8a0c1160410420bbcfc03df912ea7aacf890e3128c

Download Submit
\Windows\system\explorer.exe

Filesize
66KB

MD5
1dacd3a7fe109dad7fa732a736515360

SHA1
7b87326773cc6a617f55113f763a6d7ec78d4c79

SHA256
bb464115336ca4426713fdb83fe97a7d0d349c6c95405cd006c64d331e91051c

SHA512
778352ded2413e51bb71c586d50becefda33423932a43a30f3531d520884a1866dee25d53236d1187d1f9e84dd0b784745918ff5ff3e6da03b9f6fc853eda526

Download Submit
\Windows\system\spoolsv.exe

Filesize
66KB

MD5
3080f2799147e1024bbbb6891ec9d893

SHA1
5eb2f3a6d249dde3e46d9c698e8a96820a06fd76

SHA256
952a3ddb12b8890800b6aaa09b251f376a611a9c7a31f4f5ed01178f25c02f48

SHA512
aa6f8ce124940cefbef73abc435af516de0b156dd6d2400a0e67f9d657328b0f501c543f95f858dbd83c163807d33611545c029f251de98b91d6ce07acbe0903

Download Submit
\Windows\system\svchost.exe

Filesize
66KB

MD5
3085240cddcc0fe27faf7fd6e1a35cb9

SHA1
75ed310820a53cabcb1bedaed1ce09e185adcbc3

SHA256
080170c2a48ccf826e5143522a29542fd1014e9912c51dfdc66645a1e1fbcfb2

SHA512
1fcc8070d8963a8bfa66795481614dbbc2c2c3b02c5bf450622e1bb43bcefb108efac91e476cc59308e1180885566705f1ba02090809a5cd67e512365e7f9efa

Download Submit
memory/2344-81-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2344-37-0x0000000000020000-0x0000000000024000-memory.dmp

Filesize
16KB

Download
memory/2344-17-0x00000000027E0000-0x0000000002811000-memory.dmp

Filesize
196KB

Download
memory/2344-16-0x00000000027E0000-0x0000000002811000-memory.dmp

Filesize
196KB

Download
memory/2344-1-0x0000000000020000-0x0000000000024000-memory.dmp

Filesize
16KB

Download
memory/2344-3-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2344-0-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2344-4-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/2344-82-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/2344-2-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/2344-42-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/2420-75-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2420-69-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/2612-68-0x0000000002470000-0x00000000024A1000-memory.dmp

Filesize
196KB

Download
memory/2612-85-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2612-56-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2612-57-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/2612-63-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2712-38-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/2712-55-0x0000000001DC0000-0x0000000001DF1000-memory.dmp

Filesize
196KB

Download
memory/2712-43-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2712-79-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2932-62-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2932-35-0x0000000002B80000-0x0000000002BB1000-memory.dmp

Filesize
196KB

Download
memory/2932-20-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/2932-22-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2932-84-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2932-19-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2932-94-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download