8adf5a91aa7f509cc0cd0c220dddf4e1be235e72fdd14c33e0f6722b8aa19795

Analysis

max time kernel
150s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
04/04/2025, 01:01

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General

Target

PureLogStealer-0xb.exe
Size

193KB
MD5

98609581725d9cf7f5200dbb02266cd6
SHA1

5f8a127fb69172947c6212b3a466279794b702a4
SHA256

01b57b7ab116a353b5d7d778b62c1a99f7f9f10e6af3a524aa13b9e3a588d751
SHA512

1cfa89386dd206ba5be5a981f4942deb76b71f7dcc5a09f9cf605e87a0128983bce1a8d22300e08e0751321a47c6252575d93fa9d81e847944b2c9fc5aaa2d0d
SSDEEP

6144:pS4OgfnRtcCUsnzUCpM69/KImQi/6ebl:srg/jcy

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-1-5-21-3975168204-1612096350-4002976354-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\PureLogStealer-0xb.exe\""	PureLogStealer-0xb.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-1-5-21-3975168204-1612096350-4002976354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSEdgeUpdateX = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\PureLogStealer-0xb.exe\""	PureLogStealer-0xb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\System3264Wow = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\PureLogStealer-0xb.exe\" --init"	PureLogStealer-0xb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_1 = "AWindowsService.exe"	PureLogStealer-0xb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_3 = "windowsx-c.exe"	PureLogStealer-0xb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_4 = "System.exe"	PureLogStealer-0xb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_5 = "_default64.exe"	PureLogStealer-0xb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_6 = "native.exe"	PureLogStealer-0xb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_7 = "ux-cryptor.exe"	PureLogStealer-0xb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindowsInstaller = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\PureLogStealer-0xb.exe\" -startup"	PureLogStealer-0xb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\OneDrive10293 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\PureLogStealer-0xb.exe\" /setup"	PureLogStealer-0xb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\WINDOWS = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\PureLogStealer-0xb.exe\" --wininit"	PureLogStealer-0xb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_2 = "taskhost.exe"	PureLogStealer-0xb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_8 = "crypt0rsx.exe"	PureLogStealer-0xb.exe

Drops desktop.ini file(s) 4 IoCs

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

Hide Artifacts: Hidden Files and Directories 1 TTPs 6 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
4312	cmd.exe
4980	cmd.exe
4940	cmd.exe
4996	cmd.exe
4936	cmd.exe
4192	cmd.exe

Kills process with taskkill 1 IoCs

defense_evasion

pid	Process
5012	taskkill.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
536	PureLogStealer-0xb.exe
536	PureLogStealer-0xb.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	536	PureLogStealer-0xb.exe
Token: SeDebugPrivilege	5012	taskkill.exe

Suspicious use of WriteProcessMemory 48 IoCs

description	pid	Process	procid_target
PID 5824 wrote to memory of 4624	5824	cmd.exe	98
PID 5824 wrote to memory of 4624	5824	cmd.exe	98
PID 6104 wrote to memory of 4708	6104	cmd.exe	99
PID 6104 wrote to memory of 4708	6104	cmd.exe	99
PID 5200 wrote to memory of 4880	5200	cmd.exe	104
PID 5200 wrote to memory of 4880	5200	cmd.exe	104
PID 536 wrote to memory of 4940	536	PureLogStealer-0xb.exe	117
PID 536 wrote to memory of 4940	536	PureLogStealer-0xb.exe	117
PID 536 wrote to memory of 4980	536	PureLogStealer-0xb.exe	118
PID 536 wrote to memory of 4980	536	PureLogStealer-0xb.exe	118
PID 536 wrote to memory of 4312	536	PureLogStealer-0xb.exe	119
PID 536 wrote to memory of 4312	536	PureLogStealer-0xb.exe	119
PID 536 wrote to memory of 4192	536	PureLogStealer-0xb.exe	120
PID 536 wrote to memory of 4192	536	PureLogStealer-0xb.exe	120
PID 536 wrote to memory of 4936	536	PureLogStealer-0xb.exe	121
PID 536 wrote to memory of 4936	536	PureLogStealer-0xb.exe	121
PID 536 wrote to memory of 4996	536	PureLogStealer-0xb.exe	122
PID 536 wrote to memory of 4996	536	PureLogStealer-0xb.exe	122
PID 536 wrote to memory of 5012	536	PureLogStealer-0xb.exe	123
PID 536 wrote to memory of 5012	536	PureLogStealer-0xb.exe	123
PID 5432 wrote to memory of 540	5432	cmd.exe	131
PID 5432 wrote to memory of 540	5432	cmd.exe	131
PID 5224 wrote to memory of 2044	5224	cmd.exe	132
PID 5224 wrote to memory of 2044	5224	cmd.exe	132
PID 4980 wrote to memory of 5248	4980	cmd.exe	134
PID 4980 wrote to memory of 5248	4980	cmd.exe	134
PID 4312 wrote to memory of 1688	4312	cmd.exe	135
PID 4312 wrote to memory of 1688	4312	cmd.exe	135
PID 4192 wrote to memory of 1864	4192	cmd.exe	136
PID 4192 wrote to memory of 1864	4192	cmd.exe	136
PID 4936 wrote to memory of 2420	4936	cmd.exe	137
PID 4936 wrote to memory of 2420	4936	cmd.exe	137
PID 4996 wrote to memory of 3256	4996	cmd.exe	138
PID 4996 wrote to memory of 3256	4996	cmd.exe	138
PID 4312 wrote to memory of 3556	4312	cmd.exe	139
PID 4312 wrote to memory of 3556	4312	cmd.exe	139
PID 4940 wrote to memory of 5104	4940	cmd.exe	140
PID 4940 wrote to memory of 5104	4940	cmd.exe	140
PID 4936 wrote to memory of 2980	4936	cmd.exe	141
PID 4936 wrote to memory of 2980	4936	cmd.exe	141
PID 4996 wrote to memory of 4252	4996	cmd.exe	142
PID 4996 wrote to memory of 4252	4996	cmd.exe	142
PID 4940 wrote to memory of 1168	4940	cmd.exe	143
PID 4940 wrote to memory of 1168	4940	cmd.exe	143
PID 4980 wrote to memory of 3796	4980	cmd.exe	144
PID 4980 wrote to memory of 3796	4980	cmd.exe	144
PID 4192 wrote to memory of 5828	4192	cmd.exe	145
PID 4192 wrote to memory of 5828	4192	cmd.exe	145

Views/modifies file attributes 1 TTPs 12 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
5828	attrib.exe
5248	attrib.exe
1688	attrib.exe
1864	attrib.exe
5104	attrib.exe
4252	attrib.exe
1168	attrib.exe
2420	attrib.exe
3256	attrib.exe
3556	attrib.exe
2980	attrib.exe
3796	attrib.exe

C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe
"C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe"
1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:536
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c F: & attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted by the Legion hacker group! Telegram for contact: @xexeza 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:4940
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Views/modifies file attributes
    PID:5104
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-Locker.txt
    3⤵
    - Views/modifies file attributes
    PID:1168
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c cd "%userprofile%\desktop"&attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted by the Legion hacker group! Telegram for contact: @xexeza 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:4980
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:5248
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-Locker.txt
    3⤵
    - Views/modifies file attributes
    PID:3796
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c cd "%systemdrive%\Users\Public\Desktop"&attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted by the Legion hacker group! Telegram for contact: @xexeza 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:4312
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:1688
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-Locker.txt
    3⤵
    - Views/modifies file attributes
    PID:3556
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c cd "%userprofile%\downloads"&attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted by the Legion hacker group! Telegram for contact: @xexeza 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:4192
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:1864
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-Locker.txt
    3⤵
    - Views/modifies file attributes
    PID:5828
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c cd "%userprofile%\documents"&attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted by the Legion hacker group! Telegram for contact: @xexeza 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:4936
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:2420
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-Locker.txt
    3⤵
    - Views/modifies file attributes
    PID:2980
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c cd "%userprofile%"&attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted by the Legion hacker group! Telegram for contact: @xexeza 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:4996
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Views/modifies file attributes
    PID:3256
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-Locker.txt
    3⤵
    - Views/modifies file attributes
    PID:4252
- C:\Windows\SYSTEM32\taskkill.exe
  taskkill.exe /im Explorer.exe /f
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:5012

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe" -startup
1⤵
- Suspicious use of WriteProcessMemory
PID:5224
- C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe
  C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe -startup
  2⤵
  PID:2044

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5200
- C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe
  C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe
  2⤵
  PID:4880

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe" --init
1⤵
- Suspicious use of WriteProcessMemory
PID:6104
- C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe
  C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe --init
  2⤵
  PID:4708

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe" /setup
1⤵
- Suspicious use of WriteProcessMemory
PID:5824
- C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe
  C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe /setup
  2⤵
  PID:4624

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe" --wininit
1⤵
- Suspicious use of WriteProcessMemory
PID:5432
- C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe
  C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe --wininit
  2⤵
  PID:540

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c AWindowsService.exe
1⤵
PID:4816

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c taskhost.exe
1⤵
PID:4824

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c windowsx-c.exe
1⤵
PID:4844

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c System.exe
1⤵
PID:4828

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c _default64.exe
1⤵
PID:4888

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c native.exe
1⤵
PID:5008

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ux-cryptor.exe
1⤵
PID:4764

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c crypt0rsx.exe
1⤵
PID:5140

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\Microsoft\CLR_v4.0\UsageLogs\PureLogStealer-0xb.exe.log

Filesize
1KB

MD5
2d2a235f1b0f4b608c5910673735494b

SHA1
23a63f6529bfdf917886ab8347092238db0423a0

SHA256
c897436c82fda9abf08b29fe05c42f4e59900116bbaf8bfd5b85ef3c97ab7884

SHA512
10684245497f1a115142d49b85000075eb36f360b59a0501e2f352c9f1d767c447c6c44c53a3fb3699402a15a8017bdbd2edd72d8599fdd4772e9e7cb67f3086

Download Submit
C:\Users\Public\Desktop\info-Locker.txt

Filesize
101B

MD5
08f3476d37aba1a9688406751a7ba732

SHA1
3818a248a30bc1344292b5feeb95c3fc38cbcadf

SHA256
08eb86f622bc923a02329ea5d3a7eea9781d1178abbd25fb1e8cac0d4babd934

SHA512
3df022e5cb9e93c7133c942e5a1cb425a349f2348d74af786a8789acd16b36fb7d95a19b635ff60d7507ad357e853810789dc48e0016a66ab1996af0dbeffc76

Download Submit
memory/536-0-0x00007FFD4B4D3000-0x00007FFD4B4D5000-memory.dmp

Filesize
8KB

Download
memory/536-1-0x0000000000ED0000-0x0000000000F06000-memory.dmp

Filesize
216KB

Download
memory/536-2-0x00007FFD4B4D0000-0x00007FFD4BF91000-memory.dmp

Filesize
10.8MB

Download
memory/536-20-0x00007FFD4B4D3000-0x00007FFD4B4D5000-memory.dmp

Filesize
8KB

Download
memory/536-21-0x00007FFD4B4D0000-0x00007FFD4BF91000-memory.dmp

Filesize
10.8MB

Download