933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071

Analysis

max time kernel
150s
max time network
128s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
10/06/2024, 14:51

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General

Target

933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe
Size

66KB
MD5

766daa59bb63db8c6743ea35e10ee3bf
SHA1

73e4b640c09ea9a74604422b6524f9cada87465d
SHA256

933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071
SHA512

86952fe8682bec94f5db178c4a5ebf294ac14ae4da28f54b7fcb4b73bbd4d159a7943237776fa616b0da4d5cee9647e1f6f4ab847f0112f029e9ecdcb32cb659
SSDEEP

1536:EHfetdklPp+07gDSrB8Xru2zGeJxgawTzpXzrDJrXis:IeklMMYJhqezw/pXzH9is

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

Executes dropped EXE 4 IoCs

pid	Process
2492	explorer.exe
2524	spoolsv.exe
2428	svchost.exe
2476	spoolsv.exe

Loads dropped DLL 8 IoCs

pid	Process
1784	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe
1784	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe
2492	explorer.exe
2492	explorer.exe
2524	spoolsv.exe
2524	spoolsv.exe
2428	svchost.exe
2428	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	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.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
1784	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe
2492	explorer.exe
2492	explorer.exe
2492	explorer.exe
2492	explorer.exe
2428	svchost.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe
2428	svchost.exe
2492	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2492	explorer.exe
2428	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1784	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe
1784	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe
2492	explorer.exe
2492	explorer.exe
2524	spoolsv.exe
2524	spoolsv.exe
2428	svchost.exe
2428	svchost.exe
2476	spoolsv.exe
2476	spoolsv.exe
2492	explorer.exe
2492	explorer.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1784 wrote to memory of 2492	1784	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe	28
PID 1784 wrote to memory of 2492	1784	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe	28
PID 1784 wrote to memory of 2492	1784	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe	28
PID 1784 wrote to memory of 2492	1784	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe	28
PID 2492 wrote to memory of 2524	2492	explorer.exe	29
PID 2492 wrote to memory of 2524	2492	explorer.exe	29
PID 2492 wrote to memory of 2524	2492	explorer.exe	29
PID 2492 wrote to memory of 2524	2492	explorer.exe	29
PID 2524 wrote to memory of 2428	2524	spoolsv.exe	30
PID 2524 wrote to memory of 2428	2524	spoolsv.exe	30
PID 2524 wrote to memory of 2428	2524	spoolsv.exe	30
PID 2524 wrote to memory of 2428	2524	spoolsv.exe	30
PID 2428 wrote to memory of 2476	2428	svchost.exe	31
PID 2428 wrote to memory of 2476	2428	svchost.exe	31
PID 2428 wrote to memory of 2476	2428	svchost.exe	31
PID 2428 wrote to memory of 2476	2428	svchost.exe	31
PID 2428 wrote to memory of 760	2428	svchost.exe	32
PID 2428 wrote to memory of 760	2428	svchost.exe	32
PID 2428 wrote to memory of 760	2428	svchost.exe	32
PID 2428 wrote to memory of 760	2428	svchost.exe	32
PID 2428 wrote to memory of 1448	2428	svchost.exe	36
PID 2428 wrote to memory of 1448	2428	svchost.exe	36
PID 2428 wrote to memory of 1448	2428	svchost.exe	36
PID 2428 wrote to memory of 1448	2428	svchost.exe	36
PID 2428 wrote to memory of 2272	2428	svchost.exe	38
PID 2428 wrote to memory of 2272	2428	svchost.exe	38
PID 2428 wrote to memory of 2272	2428	svchost.exe	38
PID 2428 wrote to memory of 2272	2428	svchost.exe	38

C:\Users\Admin\AppData\Local\Temp\933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe
"C:\Users\Admin\AppData\Local\Temp\933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1784
- \??\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:2492
- - \??\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:2524
  - - \??\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:2428
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:2476
    - - C:\Windows\SysWOW64\at.exe
        
        at 14:53 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:760
    - - C:\Windows\SysWOW64\at.exe
        
        at 14:54 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:1448
    - - C:\Windows\SysWOW64\at.exe
        
        at 14:55 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:2272

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
47568b7da935ff63c835102e4ef5ca06

SHA1
b972e1f2e61ee08ca33d475b54c00a572b4bf7bd

SHA256
6e56e256f61a99553fb98af17d13c2f9566a0795bde803ac3595efd0ea8ee628

SHA512
6b8092832435737d0f3a83ef011806d40e4ec4d14dda75646438de994fea496fcf9ffae1caec37484fad4845ec6b00729063e3bb5045e48ad87af7592d82491b

Download Submit
\Windows\system\explorer.exe

Filesize
66KB

MD5
4b98ae4c246be900490850e70072dac1

SHA1
0de5251c324ffdfe680ffcf22332a957cec09a19

SHA256
ab97b41eacb0c56a6f4f7ef8dc3f5ae9586ffde463f8aa9c1ac915bf812e08a9

SHA512
7e7fb33e0f19403b2969645c7995437ac2716eab6644b651ee9bf63f48517516a7cba2e967e8ecdedee9354097e06d6a9513c19a77227b8cd9c74c2c92ad1fd0

Download Submit
\Windows\system\spoolsv.exe

Filesize
66KB

MD5
32a5603b9a7a98a6d199167cf4702f1e

SHA1
951ad98fbc181ced8df7c691db7430e376eac44d

SHA256
eff572585568c08f77996c546843cdbc5263a16c0859812d1a34589f8bcbf06d

SHA512
41ba25449a9de161a9ab49e392a06afa4bc13197ef54a9cc95599dcb4296e9d34d7bc02e73548eb12c899d1cd05f9b5a460bdc2e6230b0338cca51894c6f3682

Download Submit
\Windows\system\svchost.exe

Filesize
66KB

MD5
ab811bf7d8f35442921e8788af99a08e

SHA1
059756a1ac95d097dab437346e7f88c49ce944f2

SHA256
8811e9bc4971fd9d440dd12d1a13b84a37c68e44245fa05eff6b267e18a854c7

SHA512
7d56738dda2aaa2b6ece6341d916fe0f7d57c4a997df771942cc8616db82b89213ec4ecd258a4feef52d05f8a10afb8b63e24be1fca381a2c9065809b1c82b29

Download Submit
memory/1784-83-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/1784-1-0x0000000000020000-0x0000000000024000-memory.dmp

Filesize
16KB

Download
memory/1784-56-0x0000000000020000-0x0000000000024000-memory.dmp

Filesize
16KB

Download
memory/1784-18-0x0000000002D10000-0x0000000002D41000-memory.dmp

Filesize
196KB

Download
memory/1784-17-0x0000000002D10000-0x0000000002D41000-memory.dmp

Filesize
196KB

Download
memory/1784-3-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1784-58-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/1784-4-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/1784-82-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1784-2-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/1784-0-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2428-63-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2428-59-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/2428-86-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2476-72-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2476-70-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/2476-77-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2492-68-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2492-31-0x0000000002790000-0x00000000027C1000-memory.dmp

Filesize
196KB

Download
memory/2492-95-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2492-19-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2492-37-0x0000000002790000-0x00000000027C1000-memory.dmp

Filesize
196KB

Download
memory/2492-85-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2492-20-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/2492-24-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2524-81-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2524-50-0x0000000002450000-0x0000000002481000-memory.dmp

Filesize
196KB

Download
memory/2524-38-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2524-39-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/2524-43-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2524-57-0x0000000002450000-0x0000000002481000-memory.dmp

Filesize
196KB

Download