2b22c4fefa9c515d2aa64102ea0ba7df4108f2149af8dadc3321aeaf4a233afc

General

Target
lc.exe
Size 323KB
Sample260527-y1q8gsbv21
SHA256 2b22c4fefa9c515d2aa64102ea0ba7df4108f2149af8dadc3321aeaf4a233afc
MD5 1aa256f9d7d19c161499b5bfab37fe37
SHA1 86408e6f82c92419763aa5035abf5686dfba3e4a
SHA512 4eb046c7ba25b9d2d01e81ca07555c383ca98bc298a8576e60be5157ee6a22f5e4ecf56208a1e09a5a85ee594d9956b3edf2b145e68f63c6763b8b5be8297b9f
SSDEEP 6144:r6e0UwTaano7cSCpMW90KImQinnVbTIEnQd/hwQBjrQi33v8U:r6e0UwToZPpwu3v
TLSH
T1C864AF9023BA867AC55DD6BFE061214E43F4B52AE543EB86BC8856ECDF47300D7912E3
MD5 SHA1 SHA512 SSDEEP TLSH

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-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\lc.exe\""	lc.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-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_5 = "_default64.exe"	lc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_6 = "native.exe"	lc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\OneDrive10293 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\lc.exe\" /setup"	lc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_2 = "taskhost.exe"	lc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_3 = "windowsx-c.exe"	lc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_7 = "ux-cryptor.exe"	lc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_8 = "crypt0rsx.exe"	lc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindowsInstaller = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\lc.exe\" -startup"	lc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSEdgeUpdateX = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\lc.exe\""	lc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\System3264Wow = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\lc.exe\" --init"	lc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\WINDOWS = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\lc.exe\" --wininit"	lc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_1 = "AWindowsService.exe"	lc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WIN32_4 = "System.exe"	lc.exe

Drops desktop.ini file(s) 4 IoCs

description	ioc	Process
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
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
1788	cmd.exe
5036	cmd.exe
3520	cmd.exe
3556	cmd.exe
2196	cmd.exe
2244	cmd.exe

Kills process with taskkill 1 IoCs

defense_evasion

pid	Process
3720	taskkill.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1352	lc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1352	lc.exe
Token: SeDebugPrivilege	3720	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1352 wrote to memory of 3556	1352	lc.exe	90
PID 1352 wrote to memory of 3520	1352	lc.exe	91
PID 1352 wrote to memory of 5036	1352	lc.exe	92
PID 1352 wrote to memory of 1788	1352	lc.exe	93
PID 1352 wrote to memory of 2244	1352	lc.exe	94
PID 1352 wrote to memory of 2196	1352	lc.exe	95
PID 1352 wrote to memory of 3720	1352	lc.exe	97
PID 3520 wrote to memory of 468	3520	cmd.exe	118
PID 2196 wrote to memory of 3652	2196	cmd.exe	119
PID 5036 wrote to memory of 3124	5036	cmd.exe	120
PID 3556 wrote to memory of 4444	3556	cmd.exe	121
PID 2244 wrote to memory of 2200	2244	cmd.exe	122
PID 5036 wrote to memory of 4232	5036	cmd.exe	123
PID 1788 wrote to memory of 3496	1788	cmd.exe	124
PID 2244 wrote to memory of 4864	2244	cmd.exe	126
PID 3520 wrote to memory of 3892	3520	cmd.exe	127
PID 3556 wrote to memory of 4180	3556	cmd.exe	130
PID 1788 wrote to memory of 4028	1788	cmd.exe	131
PID 2196 wrote to memory of 4200	2196	cmd.exe	132

Views/modifies file attributes 1 TTPs 12 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
4232	attrib.exe
3892	attrib.exe
4864	attrib.exe
3652	attrib.exe
2200	attrib.exe
3496	attrib.exe
4180	attrib.exe
4028	attrib.exe
4200	attrib.exe
468	attrib.exe
4444	attrib.exe
3124	attrib.exe

C:\Users\Admin\AppData\Local\Temp\lc.exe
"C:\Users\Admin\AppData\Local\Temp\lc.exe"
1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1352
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c F: & attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted by the CryptoBytes hacker group! Telegram for contact: @PILLORES 1>info-0v92.txt & attrib -h +s +r info-0v92.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:3556
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Views/modifies file attributes
    PID:4444
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-0v92.txt
    3⤵
    - Views/modifies file attributes
    PID:4180
- 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 CryptoBytes hacker group! Telegram for contact: @PILLORES 1>info-0v92.txt & attrib -h +s +r info-0v92.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:3520
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:468
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-0v92.txt
    3⤵
    - Views/modifies file attributes
    PID:3892
- 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 CryptoBytes hacker group! Telegram for contact: @PILLORES 1>info-0v92.txt & attrib -h +s +r info-0v92.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:5036
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:3124
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-0v92.txt
    3⤵
    - Views/modifies file attributes
    PID:4232
- 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 CryptoBytes hacker group! Telegram for contact: @PILLORES 1>info-0v92.txt & attrib -h +s +r info-0v92.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:1788
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:3496
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-0v92.txt
    3⤵
    - Views/modifies file attributes
    PID:4028
- 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 CryptoBytes hacker group! Telegram for contact: @PILLORES 1>info-0v92.txt & attrib -h +s +r info-0v92.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:2244
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:2200
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-0v92.txt
    3⤵
    - Views/modifies file attributes
    PID:4864
- 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 CryptoBytes hacker group! Telegram for contact: @PILLORES 1>info-0v92.txt & attrib -h +s +r info-0v92.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:2196
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D
    3⤵
    - Views/modifies file attributes
    PID:3652
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-0v92.txt
    3⤵
    - Views/modifies file attributes
    PID:4200
- C:\Windows\SYSTEM32\taskkill.exe
  taskkill.exe /im Explorer.exe /f
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:3720

C:\Users\Admin\AppData\Local\Temp\lc.exe
"C:\Users\Admin\AppData\Local\Temp\lc.exe" -startup
1⤵
PID:1596

C:\Users\Admin\AppData\Local\Temp\lc.exe
"C:\Users\Admin\AppData\Local\Temp\lc.exe" /setup
1⤵
PID:3448

C:\Users\Admin\AppData\Local\Temp\lc.exe
"C:\Users\Admin\AppData\Local\Temp\lc.exe"
1⤵
PID:652

C:\Users\Admin\AppData\Local\Temp\lc.exe
"C:\Users\Admin\AppData\Local\Temp\lc.exe" --wininit
1⤵
PID:3176

C:\Users\Admin\AppData\Local\Temp\lc.exe
"C:\Users\Admin\AppData\Local\Temp\lc.exe" --init
1⤵
PID:1124

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Hide Artifacts

2

T1564

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

lc.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\lc.exe.log
Size 1KB
SHA256 c897436c82fda9abf08b29fe05c42f4e59900116bbaf8bfd5b85ef3c97ab7884
MD5 2d2a235f1b0f4b608c5910673735494b
SHA1 23a63f6529bfdf917886ab8347092238db0423a0
SHA512 10684245497f1a115142d49b85000075eb36f360b59a0501e2f352c9f1d767c447c6c44c53a3fb3699402a15a8017bdbd2edd72d8599fdd4772e9e7cb67f3086
TLSH
T1C031DE712372B1D889163F431C2D2AC007BF4769B660EE0C7598625ED9260175F222F3
MD5 SHA1 SHA512 TLSH

Submit Download

info-0v92.txt

Path C:\Users\Admin\Desktop\info-0v92.txt
Size 108B
SHA256 f84fb83e9c933baaa005b4e531d3372b7a33ac02c4d653c9b2bd3c88a330f05f
MD5 d41ccd89d8ce99f07db3933a4957f5e7
SHA1 5a900b79ef08497ae9c88e2b53d1c062e8831bf3
SHA512 421fdc18eb5c0ee3720a12164fd65eb2afa6306eef54ba1d6878ba5c6fa58a8920175512122359c29e5448c63cec4a56fe9ebc8e36489aab050d0095d324746f
TLSH
T128B09B145DB8528415A511F17531B1607499A60D506615511145006914644A82DDA565
MD5 SHA1 SHA512 TLSH

Submit Download

info-0v92.txt

Path C:\Users\Public\Desktop\info-0v92.txt
Size 108B
SHA256 700d8f01997aba2b126a9b73e87cb7b22ffa7bb5aba344cf938444f717414a39
MD5 c1f8d81202be8db21270192cda55a0e0
SHA1 124b657a28f78fa08082a154defb38175128697f
SHA512 0cf9f3d2b67e42912b600d2ff5d4a617a6b89677463ee20de92a837abf4b933ce06149888e3e6b349ec2c5d9157912d4fafa60ccdf836d8a3273858acf46dad4
TLSH
T1F2B014145D7C53C4117111F17731F15474DDD70D517715551104007D14744FC1DDF575
MD5 SHA1 SHA512 TLSH

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memory/1352-0-0x0000000000860000-0x00000000008B8000-memory.dmp

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memory/1352-1-0x000000001B5D0000-0x000000001B5E0000-memory.dmp

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memory/1352-19-0x000000001B5D0000-0x000000001B5E0000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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