8adf5a91aa7f509cc0cd0c220dddf4e1be235e72fdd14c33e0f6722b8aa19795

Analysis

max time kernel
150s
max time network
145s
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, 01:30

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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\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\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\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_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_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\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\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_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_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\WIN32_8 = "crypt0rsx.exe"	PureLogStealer-0xb.exe

Drops desktop.ini file(s) 4 IoCs

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

pid	Process
4572	cmd.exe
4624	cmd.exe
4848	cmd.exe
4720	cmd.exe
4680	cmd.exe
4688	cmd.exe

Kills process with taskkill 1 IoCs

defense_evasion

pid	Process
2384	taskkill.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

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

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	756	PureLogStealer-0xb.exe
Token: SeDebugPrivilege	2384	taskkill.exe

Suspicious use of WriteProcessMemory 48 IoCs

description	pid	Process	procid_target
PID 4244 wrote to memory of 2380	4244	cmd.exe	96
PID 4244 wrote to memory of 2380	4244	cmd.exe	96
PID 2464 wrote to memory of 4536	2464	cmd.exe	108
PID 2464 wrote to memory of 4536	2464	cmd.exe	108
PID 756 wrote to memory of 4572	756	PureLogStealer-0xb.exe	112
PID 756 wrote to memory of 4572	756	PureLogStealer-0xb.exe	112
PID 756 wrote to memory of 4688	756	PureLogStealer-0xb.exe	113
PID 756 wrote to memory of 4688	756	PureLogStealer-0xb.exe	113
PID 756 wrote to memory of 4680	756	PureLogStealer-0xb.exe	115
PID 756 wrote to memory of 4680	756	PureLogStealer-0xb.exe	115
PID 756 wrote to memory of 4720	756	PureLogStealer-0xb.exe	116
PID 756 wrote to memory of 4720	756	PureLogStealer-0xb.exe	116
PID 756 wrote to memory of 4848	756	PureLogStealer-0xb.exe	117
PID 756 wrote to memory of 4848	756	PureLogStealer-0xb.exe	117
PID 756 wrote to memory of 4624	756	PureLogStealer-0xb.exe	118
PID 756 wrote to memory of 4624	756	PureLogStealer-0xb.exe	118
PID 756 wrote to memory of 2384	756	PureLogStealer-0xb.exe	119
PID 756 wrote to memory of 2384	756	PureLogStealer-0xb.exe	119
PID 5828 wrote to memory of 4800	5828	cmd.exe	128
PID 5828 wrote to memory of 4800	5828	cmd.exe	128
PID 3124 wrote to memory of 4772	3124	cmd.exe	129
PID 3124 wrote to memory of 4772	3124	cmd.exe	129
PID 3564 wrote to memory of 4768	3564	cmd.exe	130
PID 3564 wrote to memory of 4768	3564	cmd.exe	130
PID 4572 wrote to memory of 2444	4572	cmd.exe	132
PID 4572 wrote to memory of 2444	4572	cmd.exe	132
PID 4688 wrote to memory of 5928	4688	cmd.exe	133
PID 4688 wrote to memory of 5928	4688	cmd.exe	133
PID 4680 wrote to memory of 2092	4680	cmd.exe	134
PID 4680 wrote to memory of 2092	4680	cmd.exe	134
PID 4720 wrote to memory of 4952	4720	cmd.exe	135
PID 4720 wrote to memory of 4952	4720	cmd.exe	135
PID 4848 wrote to memory of 5128	4848	cmd.exe	136
PID 4848 wrote to memory of 5128	4848	cmd.exe	136
PID 4624 wrote to memory of 2796	4624	cmd.exe	137
PID 4624 wrote to memory of 2796	4624	cmd.exe	137
PID 4720 wrote to memory of 2340	4720	cmd.exe	138
PID 4720 wrote to memory of 2340	4720	cmd.exe	138
PID 4680 wrote to memory of 2772	4680	cmd.exe	139
PID 4680 wrote to memory of 2772	4680	cmd.exe	139
PID 4688 wrote to memory of 1916	4688	cmd.exe	140
PID 4688 wrote to memory of 1916	4688	cmd.exe	140
PID 4624 wrote to memory of 5684	4624	cmd.exe	141
PID 4624 wrote to memory of 5684	4624	cmd.exe	141
PID 4848 wrote to memory of 5112	4848	cmd.exe	142
PID 4848 wrote to memory of 5112	4848	cmd.exe	142
PID 4572 wrote to memory of 5952	4572	cmd.exe	143
PID 4572 wrote to memory of 5952	4572	cmd.exe	143

Views/modifies file attributes 1 TTPs 12 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
5112	attrib.exe
2444	attrib.exe
2772	attrib.exe
1916	attrib.exe
5952	attrib.exe
5928	attrib.exe
2092	attrib.exe
4952	attrib.exe
5128	attrib.exe
2796	attrib.exe
2340	attrib.exe
5684	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:756
- 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:4572
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Views/modifies file attributes
    PID:2444
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-Locker.txt
    3⤵
    - Views/modifies file attributes
    PID:5952
- 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:4688
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:5928
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-Locker.txt
    3⤵
    - Views/modifies file attributes
    PID:1916
- 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:4680
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:2092
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-Locker.txt
    3⤵
    - Views/modifies file attributes
    PID:2772
- 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:4720
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:4952
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-Locker.txt
    3⤵
    - Views/modifies file attributes
    PID:2340
- 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:4848
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:5128
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-Locker.txt
    3⤵
    - Views/modifies file attributes
    PID:5112
- 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:4624
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Views/modifies file attributes
    PID:2796
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-Locker.txt
    3⤵
    - Views/modifies file attributes
    PID:5684
- C:\Windows\SYSTEM32\taskkill.exe
  taskkill.exe /im Explorer.exe /f
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:2384

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:4244
- C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe
  C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe -startup
  2⤵
  PID:2380

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:3564
- C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe
  C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe
  2⤵
  PID:4768

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:2464
- C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe
  C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe --init
  2⤵
  PID:4536

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:3124
- C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe
  C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe /setup
  2⤵
  PID:4772

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:5828
- C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe
  C:\Users\Admin\AppData\Local\Temp\PureLogStealer-0xb.exe --wininit
  2⤵
  PID:4800

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c AWindowsService.exe
1⤵
PID:5932

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c taskhost.exe
1⤵
PID:1752

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c System.exe
1⤵
PID:2776

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c windowsx-c.exe
1⤵
PID:3788

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c _default64.exe
1⤵
PID:4696

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c native.exe
1⤵
PID:4416

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c crypt0rsx.exe
1⤵
PID:4420

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ux-cryptor.exe
1⤵
PID:4428

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\Admin\Downloads\info-Locker.txt

Filesize
101B

MD5
1a2b4698b0e96ae9366d34402fbdb9b4

SHA1
7b7812f974e740b06b00d6aef2c99992ff4ce927

SHA256
e0ec26166649bc5126d55bb72939d3e2f12a59b6061c02f8c22085e5628f892c

SHA512
4acc058962dfcc85d27581c4b425a721406551ef83468c6186a70f77802bba76a3c52f1d91028b022098abc9ef824474215b9ed408fc47a6d32724218e0fdad1

Download Submit
memory/756-0-0x00007FFCA2533000-0x00007FFCA2535000-memory.dmp

Filesize
8KB

Download
memory/756-1-0x00000000004D0000-0x0000000000506000-memory.dmp

Filesize
216KB

Download
memory/756-2-0x00007FFCA2530000-0x00007FFCA2FF1000-memory.dmp

Filesize
10.8MB

Download
memory/756-20-0x00007FFCA2533000-0x00007FFCA2535000-memory.dmp

Filesize
8KB

Download
memory/756-21-0x00007FFCA2530000-0x00007FFCA2FF1000-memory.dmp

Filesize
10.8MB

Download