0a70692275be31f3b79f781c49503b3fe20d0e05716d2237987f59009dbf040c

Analysis

max time kernel
150s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
20-09-2024 21:53

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General

Target

0a70692275be31f3b79f781c49503b3fe20d0e05716d2237987f59009dbf040cN.exe
Size

69KB
MD5

e2cd247fdc2af196d3fa98a2090ec630
SHA1

b8ddb2798b79f95fb202f7fc191f7370e4c358d5
SHA256

0a70692275be31f3b79f781c49503b3fe20d0e05716d2237987f59009dbf040c
SHA512

4cf48a03501f970a9acfc7ca6e1622c7fee49916bae8bd6124c3777092911805caabcdf449ff4141fcf1ca4f5ec6a12824bf420906c9579cb0eef9e7f29805ba
SSDEEP

1536:EJrFDMRyriCY/qXfatMp4Q2V6fIMxIpLT:0F8dCY85TE6fIMSRT

Score

10^/10

discovery evasion persistence upx

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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Boot or Logon Autostart Execution: Active Setup 2 TTPs 8 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
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
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe

Executes dropped EXE 4 IoCs

pid	Process
2832	explorer.exe
2568	spoolsv.exe
2848	svchost.exe
2712	spoolsv.exe

Loads dropped DLL 8 IoCs

pid	Process
2680	0a70692275be31f3b79f781c49503b3fe20d0e05716d2237987f59009dbf040cN.exe
2680	0a70692275be31f3b79f781c49503b3fe20d0e05716d2237987f59009dbf040cN.exe
2832	explorer.exe
2832	explorer.exe
2568	spoolsv.exe
2568	spoolsv.exe
2848	svchost.exe
2848	svchost.exe

UPX packed file 16 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2680-0-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/files/0x0009000000015d07-6.dat	upx
behavioral1/files/0x0008000000015d48-21.dat	upx
behavioral1/memory/2832-23-0x0000000002B00000-0x0000000002B34000-memory.dmp	upx
behavioral1/memory/2568-31-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/files/0x0008000000015d70-36.dat	upx
behavioral1/memory/2680-50-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/memory/2712-56-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/memory/2832-55-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/memory/2712-59-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/memory/2568-63-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/memory/2680-65-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/files/0x0008000000015d68-66.dat	upx
behavioral1/memory/2848-68-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/memory/2832-69-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/memory/2832-81-0x0000000000400000-0x0000000000434000-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\\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	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	0a70692275be31f3b79f781c49503b3fe20d0e05716d2237987f59009dbf040cN.exe
File opened for modification	\??\c:\windows\system\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	spoolsv.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 8 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	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0a70692275be31f3b79f781c49503b3fe20d0e05716d2237987f59009dbf040cN.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

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2680	0a70692275be31f3b79f781c49503b3fe20d0e05716d2237987f59009dbf040cN.exe
2832	explorer.exe
2832	explorer.exe
2832	explorer.exe
2848	svchost.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe
2832	explorer.exe
2848	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2832	explorer.exe
2848	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2680	0a70692275be31f3b79f781c49503b3fe20d0e05716d2237987f59009dbf040cN.exe
2680	0a70692275be31f3b79f781c49503b3fe20d0e05716d2237987f59009dbf040cN.exe
2832	explorer.exe
2832	explorer.exe
2568	spoolsv.exe
2568	spoolsv.exe
2848	svchost.exe
2848	svchost.exe
2712	spoolsv.exe
2712	spoolsv.exe
2832	explorer.exe
2832	explorer.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2680 wrote to memory of 2832	2680	0a70692275be31f3b79f781c49503b3fe20d0e05716d2237987f59009dbf040cN.exe	31
PID 2680 wrote to memory of 2832	2680	0a70692275be31f3b79f781c49503b3fe20d0e05716d2237987f59009dbf040cN.exe	31
PID 2680 wrote to memory of 2832	2680	0a70692275be31f3b79f781c49503b3fe20d0e05716d2237987f59009dbf040cN.exe	31
PID 2680 wrote to memory of 2832	2680	0a70692275be31f3b79f781c49503b3fe20d0e05716d2237987f59009dbf040cN.exe	31
PID 2832 wrote to memory of 2568	2832	explorer.exe	32
PID 2832 wrote to memory of 2568	2832	explorer.exe	32
PID 2832 wrote to memory of 2568	2832	explorer.exe	32
PID 2832 wrote to memory of 2568	2832	explorer.exe	32
PID 2568 wrote to memory of 2848	2568	spoolsv.exe	33
PID 2568 wrote to memory of 2848	2568	spoolsv.exe	33
PID 2568 wrote to memory of 2848	2568	spoolsv.exe	33
PID 2568 wrote to memory of 2848	2568	spoolsv.exe	33
PID 2848 wrote to memory of 2712	2848	svchost.exe	34
PID 2848 wrote to memory of 2712	2848	svchost.exe	34
PID 2848 wrote to memory of 2712	2848	svchost.exe	34
PID 2848 wrote to memory of 2712	2848	svchost.exe	34
PID 2848 wrote to memory of 1052	2848	svchost.exe	35
PID 2848 wrote to memory of 1052	2848	svchost.exe	35
PID 2848 wrote to memory of 1052	2848	svchost.exe	35
PID 2848 wrote to memory of 1052	2848	svchost.exe	35
PID 2848 wrote to memory of 1564	2848	svchost.exe	37
PID 2848 wrote to memory of 1564	2848	svchost.exe	37
PID 2848 wrote to memory of 1564	2848	svchost.exe	37
PID 2848 wrote to memory of 1564	2848	svchost.exe	37
PID 2848 wrote to memory of 920	2848	svchost.exe	40
PID 2848 wrote to memory of 920	2848	svchost.exe	40
PID 2848 wrote to memory of 920	2848	svchost.exe	40
PID 2848 wrote to memory of 920	2848	svchost.exe	40

C:\Users\Admin\AppData\Local\Temp\0a70692275be31f3b79f781c49503b3fe20d0e05716d2237987f59009dbf040cN.exe
"C:\Users\Admin\AppData\Local\Temp\0a70692275be31f3b79f781c49503b3fe20d0e05716d2237987f59009dbf040cN.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:2680
- \??\c:\windows\system\explorer.exe
  c:\windows\system\explorer.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visiblity of hidden/system files in Explorer
  - Boot or Logon Autostart Execution: Active Setup
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - 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:2832
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\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:2568
  - - \??\c:\windows\system\svchost.exe
      c:\windows\system\svchost.exe
      4⤵
      Modifies WinLogon for persistence
      Modifies visiblity of hidden/system files in Explorer
      Boot or Logon Autostart Execution: Active Setup
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      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:2848
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2712
    - - C:\Windows\SysWOW64\at.exe
        
        at 21:55 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:1052
    - - C:\Windows\SysWOW64\at.exe
        
        at 21:56 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:1564
    - - C:\Windows\SysWOW64\at.exe
        
        at 21:57 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:920

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
69KB

MD5
0391571a158fb398797de63a933b5db7

SHA1
c178a7410b224a9ce1c50632c55c0101c921526b

SHA256
b77dde686a3fb8a7be83a549d175916b18f205c1ecfcd97b073607d72c5999a9

SHA512
686a9a422bf9536dfee3ac1c00fd94ba00e34b189e0e9694ee6e31d08278b8efbd9dfa9c0b63927ed21c110e19a2cd69d89787a9c4d9b0a1b356cecc41238a85

Download Submit
\Windows\system\explorer.exe

Filesize
69KB

MD5
652e5da7380c38aface82bf56f2b6f1b

SHA1
cafe43b21200518dfa7b4d6519868978084684cc

SHA256
565ca17d024c2ea6f0a538b27bd0616a7e7e0972d7f5336ebee2818cd175a883

SHA512
ab7b592c8b33a4e6ac3c875a0cd83367275a259c519d578efa30e8a24214053e8e36acf653e52169df84c817539d21e8c1b458c2c3ff512273ec8ce628091302

Download Submit
\Windows\system\spoolsv.exe

Filesize
69KB

MD5
aa6772ee73276a3a1ca4e6db4de440a8

SHA1
ae8024f669e8c6700b87f610c515dfa5842c74e8

SHA256
16ece983ceb388518d6773e6f46629b87d09e0ecac0d0dbeecd2e7b45f5fa0db

SHA512
c60df463dd2a61158cbecb4471f843b1e6b3f2376cb9267c75bd68efa6370276f54673bd5f7f376c78097d9ad35eaf94dac1984b388f1e13d9b6419848eec3c8

Download Submit
\Windows\system\svchost.exe

Filesize
69KB

MD5
6ad191ffba14bb0e83b7e88dd30e8eb8

SHA1
063455e1ae87b863870afff69a1d76ed219e0598

SHA256
93cd6a0251d250f6a5bf203346f43aa3a855705622122294fed40dc5dada8c61

SHA512
8a40def0c948e910ab4919ab494c4696ffe56b8dcfabbc529f4040666ac7175f6062462a329b40dce2881a14e8abcfecc21802f54fd1bf10601b3ace1d2f5e0c

Download Submit
memory/2568-63-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2568-42-0x00000000026D0000-0x0000000002704000-memory.dmp

Filesize
208KB

Download
memory/2568-31-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2680-65-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2680-13-0x00000000025F0000-0x0000000002624000-memory.dmp

Filesize
208KB

Download
memory/2680-50-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2680-53-0x00000000025F0000-0x0000000002624000-memory.dmp

Filesize
208KB

Download
memory/2680-14-0x00000000025F0000-0x0000000002624000-memory.dmp

Filesize
208KB

Download
memory/2680-0-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2712-56-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2712-59-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2832-55-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2832-23-0x0000000002B00000-0x0000000002B34000-memory.dmp

Filesize
208KB

Download
memory/2832-67-0x0000000002B00000-0x0000000002B34000-memory.dmp

Filesize
208KB

Download
memory/2832-69-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2832-81-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2848-68-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download