ad861f41bb4a31ee778bf60cecf0a7bdd9c0cc91d5cc17775d15199c214fbccf

Analysis

max time kernel
117s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22-11-2024 09:15

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General

Target

OsLock.exe
Size

385KB
MD5

675ea787630f596da0474830ffb49723
SHA1

c8e18cbc3cca1ded47eb5860a71b9f22d46409e1
SHA256

ad861f41bb4a31ee778bf60cecf0a7bdd9c0cc91d5cc17775d15199c214fbccf
SHA512

fa3c2c6edd3435bd16ec652c1738695cd1e8cdbd010b55fd856cefdbebd50552074d06e9b66860fae9c3a2f71ffe1076bb0227944b49286f05e1a3a4c871014d
SSDEEP

6144:Z1IE/9oydPc4IvjTZlyZsDDyr3rAUp48zUCpM69/KImQi/6ebkY:Z1vlc4IrTZlyGDc54

Score

10^/10

defense_evasion persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\""	OsLock.exe

Drops startup file 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	attrib.exe

Adds Run key to start application 2 TTPs 13 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsInstaller = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\" -startup"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\System3264Wow = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\" --init"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\WIN32_1 = "AWindowsService.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\WIN32_2 = "taskhost.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\WIN32_4 = "System.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\MSEdgeUpdateX = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\""	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\OneDrive10293 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\" /setup"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\WINDOWS = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\" --wininit"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\WIN32_3 = "windowsx-c.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\WIN32_5 = "_default64.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\WIN32_6 = "native.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\WIN32_7 = "ux-cryptor.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\WIN32_8 = "crypt0rsx.exe"	OsLock.exe

Drops desktop.ini file(s) 45 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\75GKCLJR\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\GUJ7UW2N\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\History\History.IE5\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\History\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\6GFIGH6G\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	attrib.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-1846800975-3917212583-2893086201-1000\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\3W44XPEP\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\GY8QW6M2\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\L7XNHY48\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows Mail\Stationery\Desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	attrib.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\GKATPXW1\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\Y8O71085\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	attrib.exe

Hide Artifacts: Hidden Files and Directories 1 TTPs 6 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
2732	cmd.exe
2772	cmd.exe
2776	cmd.exe
2824	cmd.exe
2828	cmd.exe
2868	cmd.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2848	taskkill.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1872	OsLock.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1872	OsLock.exe
Token: SeDebugPrivilege	2848	taskkill.exe

Suspicious use of WriteProcessMemory 57 IoCs

description	pid	Process	procid_target
PID 1872 wrote to memory of 2732	1872	OsLock.exe	31
PID 1872 wrote to memory of 2732	1872	OsLock.exe	31
PID 1872 wrote to memory of 2732	1872	OsLock.exe	31
PID 1872 wrote to memory of 2772	1872	OsLock.exe	32
PID 1872 wrote to memory of 2772	1872	OsLock.exe	32
PID 1872 wrote to memory of 2772	1872	OsLock.exe	32
PID 1872 wrote to memory of 2776	1872	OsLock.exe	33
PID 1872 wrote to memory of 2776	1872	OsLock.exe	33
PID 1872 wrote to memory of 2776	1872	OsLock.exe	33
PID 1872 wrote to memory of 2824	1872	OsLock.exe	34
PID 1872 wrote to memory of 2824	1872	OsLock.exe	34
PID 1872 wrote to memory of 2824	1872	OsLock.exe	34
PID 1872 wrote to memory of 2828	1872	OsLock.exe	35
PID 1872 wrote to memory of 2828	1872	OsLock.exe	35
PID 1872 wrote to memory of 2828	1872	OsLock.exe	35
PID 1872 wrote to memory of 2868	1872	OsLock.exe	36
PID 1872 wrote to memory of 2868	1872	OsLock.exe	36
PID 1872 wrote to memory of 2868	1872	OsLock.exe	36
PID 1872 wrote to memory of 2848	1872	OsLock.exe	37
PID 1872 wrote to memory of 2848	1872	OsLock.exe	37
PID 1872 wrote to memory of 2848	1872	OsLock.exe	37
PID 2732 wrote to memory of 2924	2732	cmd.exe	45
PID 2732 wrote to memory of 2924	2732	cmd.exe	45
PID 2732 wrote to memory of 2924	2732	cmd.exe	45
PID 2868 wrote to memory of 1632	2868	cmd.exe	46
PID 2868 wrote to memory of 1632	2868	cmd.exe	46
PID 2868 wrote to memory of 1632	2868	cmd.exe	46
PID 2776 wrote to memory of 2764	2776	cmd.exe	47
PID 2776 wrote to memory of 2764	2776	cmd.exe	47
PID 2776 wrote to memory of 2764	2776	cmd.exe	47
PID 2824 wrote to memory of 2800	2824	cmd.exe	48
PID 2824 wrote to memory of 2800	2824	cmd.exe	48
PID 2824 wrote to memory of 2800	2824	cmd.exe	48
PID 2772 wrote to memory of 2796	2772	cmd.exe	49
PID 2772 wrote to memory of 2796	2772	cmd.exe	49
PID 2772 wrote to memory of 2796	2772	cmd.exe	49
PID 2732 wrote to memory of 2680	2732	cmd.exe	50
PID 2732 wrote to memory of 2680	2732	cmd.exe	50
PID 2732 wrote to memory of 2680	2732	cmd.exe	50
PID 2828 wrote to memory of 2624	2828	cmd.exe	51
PID 2828 wrote to memory of 2624	2828	cmd.exe	51
PID 2828 wrote to memory of 2624	2828	cmd.exe	51
PID 2776 wrote to memory of 2636	2776	cmd.exe	52
PID 2776 wrote to memory of 2636	2776	cmd.exe	52
PID 2776 wrote to memory of 2636	2776	cmd.exe	52
PID 2772 wrote to memory of 2656	2772	cmd.exe	53
PID 2772 wrote to memory of 2656	2772	cmd.exe	53
PID 2772 wrote to memory of 2656	2772	cmd.exe	53
PID 2824 wrote to memory of 2688	2824	cmd.exe	54
PID 2824 wrote to memory of 2688	2824	cmd.exe	54
PID 2824 wrote to memory of 2688	2824	cmd.exe	54
PID 2828 wrote to memory of 2748	2828	cmd.exe	55
PID 2828 wrote to memory of 2748	2828	cmd.exe	55
PID 2828 wrote to memory of 2748	2828	cmd.exe	55
PID 2868 wrote to memory of 2852	2868	cmd.exe	56
PID 2868 wrote to memory of 2852	2868	cmd.exe	56
PID 2868 wrote to memory of 2852	2868	cmd.exe	56

Views/modifies file attributes 1 TTPs 12 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2764	attrib.exe
1632	attrib.exe
2924	attrib.exe
2800	attrib.exe
2796	attrib.exe
2636	attrib.exe
2656	attrib.exe
2688	attrib.exe
2680	attrib.exe
2624	attrib.exe
2748	attrib.exe
2852	attrib.exe

C:\Users\Admin\AppData\Local\Temp\OsLock.exe
"C:\Users\Admin\AppData\Local\Temp\OsLock.exe"
1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1872
- C:\Windows\system32\cmd.exe
  cmd.exe /c F: & attrib +h +s +r +i /D /S * & echo [%RANDOM%] Упсик Твои файлы Зашифрованы! Пиши @N0TK4RMA 1>info-0v92.txt & attrib -h +s +r info-lox.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:2732
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D /S *
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:2924
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:2680
- C:\Windows\system32\cmd.exe
  cmd.exe /c cd "%userprofile%\desktop"&attrib +h +s +r +i /D /S * & echo [%RANDOM%] Упсик Твои файлы Зашифрованы! Пиши @N0TK4RMA 1>info-0v92.txt & attrib -h +s +r info-lox.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:2772
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D /S *
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:2796
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:2656
- C:\Windows\system32\cmd.exe
  cmd.exe /c cd "%systemdrive%\Users\Public\Desktop"&attrib +h +s +r +i /D /S * & echo [%RANDOM%] Упсик Твои файлы Зашифрованы! Пиши @N0TK4RMA 1>info-0v92.txt & attrib -h +s +r info-lox.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:2776
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D /S *
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:2764
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:2636
- C:\Windows\system32\cmd.exe
  cmd.exe /c cd "%userprofile%\downloads"&attrib +h +s +r +i /D /S * & echo [%RANDOM%] Упсик Твои файлы Зашифрованы! Пиши @N0TK4RMA 1>info-0v92.txt & attrib -h +s +r info-lox.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:2824
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D /S *
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:2800
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:2688
- C:\Windows\system32\cmd.exe
  cmd.exe /c cd "%userprofile%\documents"&attrib +h +s +r +i /D /S * & echo [%RANDOM%] Упсик Твои файлы Зашифрованы! Пиши @N0TK4RMA 1>info-0v92.txt & attrib -h +s +r info-lox.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:2828
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D /S *
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:2624
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:2748
- C:\Windows\system32\cmd.exe
  cmd.exe /c cd "%userprofile%"&attrib +h +s +r +i /D /S * & echo [%RANDOM%] Упсик Твои файлы Зашифрованы! Пиши @N0TK4RMA 1>info-0v92.txt & attrib -h +s +r info-lox.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:2868
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D /S *
    3⤵
    - Drops startup file
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:1632
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:2852
- C:\Windows\system32\taskkill.exe
  taskkill.exe /im Explorer.exe /f
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:2848

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\$unlocker_id.ux-cryptobytes

Filesize
6B

MD5
c2ddb87fcd81f868895dc5e4cce00702

SHA1
90d6c9d00c574088776887f3863a849233856333

SHA256
c27e7902281a66630c499d0d7c1013f0cb17a7f5ea333ab35fde73d6e5d8ac36

SHA512
3407ae2d3caa0928b1f3fb7b6e48856dfc6048f8f55eb2502abee0aa0196e373eb2cdc840a10b79f80edb79d5db021ed7f7ca93ca2aff4c016d0de1f2ef84b49

Download Submit
C:\Users\Admin\Documents\info-0v92.txt

Filesize
56B

MD5
5250167e9ed5616c92f2c49b7e295375

SHA1
6ca4f968809543f95a7c476bf39a9000231a4a4e

SHA256
0a8ce0b30dffe9ca968d05f8067a017bc48e0f5a432d75b4b7d25d59ad58a40d

SHA512
df65c59ba2c3b5033b85c4a526957c0ecd508acb2222b95133fa574df7a77abd3007a682d56312357e3ace87b88bd386c5463884d2c28c184808cf7c0608aeec

Download Submit
memory/1872-0-0x000007FEF53E3000-0x000007FEF53E4000-memory.dmp

Filesize
4KB

Download
memory/1872-1-0x0000000000180000-0x00000000001E6000-memory.dmp

Filesize
408KB

Download
memory/1872-2-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

Filesize
9.9MB

Download
memory/1872-16-0x000007FEF53E3000-0x000007FEF53E4000-memory.dmp

Filesize
4KB

Download
memory/1872-17-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

Filesize
9.9MB

Download