locky | 33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f

General

Target

33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe
Size

580KB
MD5

86927f4d92665747679ab72a9be87b05
SHA1

35549e85c4cb875e1710afaf274aeead50e06752
SHA256

33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f
SHA512

33255234e1a1a7c19d92e503a57cecef9e1cb46ff5472f2416772a0e9087c111edded597618bb73ee8494c0bc23924d97396b1bc5f2657e946c6e1552696381f

Score

10^/10

locky ransomware

Malware Config

Signatures

Locky
Ransomware strain released in 2016, with advanced features like anti-analysis.
ransomware locky
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Modifies extensions of user files 1 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe

description	ioc	process
File opened for modification	\??\c:\Users\Admin\Pictures\WriteSubmit.tiff	33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1520 cmd.exe

pid	process
1520	cmd.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

Processes:

33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Desktop\\ykcol.bmp"	33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe

Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Processes:

vssadmin.exe

pid process

384 vssadmin.exe

pid	process
384	vssadmin.exe

Modifies Control Panel 2 IoCs

evasion

Processes:

33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Control Panel\Desktop\WallpaperStyle = "0"	33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Control Panel\Desktop\TileWallpaper = "0"	33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe

Modifies Internet Explorer settings 1 TTPs 31 IoCs

adware spyware

Modify Registry

T1112

Processes:

iexplore.exeIEXPLORE.EXE

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\IntelliForms	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{006932D1-F046-11EC-939C-6AE7990DC39D} = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Toolbar	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000358f16e0538341458b70f68dad1eafd40000000002000000000010660000000100002000000009d4463f6fd8e992c084453010f985ce203f24da753358703d543f7c478ce3f1000000000e80000000020000200000003c2a7a462e82564cea1b8b61fd1711a18a51649f17919fef3daf93f27f1f0c15200000008c5ffea8d95dbe0afbbbb763a428146dc29348d1846b6547cacdc03289ee2cc540000000abce82c9ee20dfc74747f196a37faba4450afb790c182e5c4d4237de9b42886690084447fad3dfede6b2bd61cd6a9289491695b3d2b6683f10e72cd15fdd4655	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\LowRegistry	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\PageSetup	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\GPU	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Zoom	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 207c4ad65284d801	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\MFV = 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	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	IEXPLORE.EXE

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 240 vssvc.exe
Token: SeRestorePrivilege 240 vssvc.exe
Token: SeAuditPrivilege 240 vssvc.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

iexplore.exeDllHost.exe

pid process

1888 iexplore.exe
1488 DllHost.exe
Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

iexplore.exeIEXPLORE.EXE

pid process

1888 iexplore.exe
1888 iexplore.exe
972 IEXPLORE.EXE
972 IEXPLORE.EXE

description	pid	process
Token: SeBackupPrivilege	240	vssvc.exe
Token: SeRestorePrivilege	240	vssvc.exe
Token: SeAuditPrivilege	240	vssvc.exe

pid	process
1888	iexplore.exe
1488	DllHost.exe

pid	process
1888	iexplore.exe
1888	iexplore.exe
972	IEXPLORE.EXE
972	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

taskeng.exe33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exeiexplore.exe

description	pid	process	target process
PID 320 wrote to memory of 384	320	taskeng.exe	vssadmin.exe
PID 320 wrote to memory of 384	320	taskeng.exe	vssadmin.exe
PID 320 wrote to memory of 384	320	taskeng.exe	vssadmin.exe
PID 1228 wrote to memory of 1888	1228	33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe	iexplore.exe
PID 1228 wrote to memory of 1888	1228	33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe	iexplore.exe
PID 1228 wrote to memory of 1888	1228	33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe	iexplore.exe
PID 1228 wrote to memory of 1888	1228	33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe	iexplore.exe
PID 1228 wrote to memory of 1520	1228	33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe	cmd.exe
PID 1228 wrote to memory of 1520	1228	33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe	cmd.exe
PID 1228 wrote to memory of 1520	1228	33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe	cmd.exe
PID 1228 wrote to memory of 1520	1228	33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe	cmd.exe
PID 1888 wrote to memory of 972	1888	iexplore.exe	IEXPLORE.EXE
PID 1888 wrote to memory of 972	1888	iexplore.exe	IEXPLORE.EXE
PID 1888 wrote to memory of 972	1888	iexplore.exe	IEXPLORE.EXE
PID 1888 wrote to memory of 972	1888	iexplore.exe	IEXPLORE.EXE

C:\Users\Admin\AppData\Local\Temp\33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe
"C:\Users\Admin\AppData\Local\Temp\33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe"
1⤵
- Modifies extensions of user files
- Sets desktop wallpaper using registry
- Enumerates system info in registry
- Modifies Control Panel
- Suspicious use of WriteProcessMemory
PID:1228

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" C:\Users\Admin\Desktop\ykcol.htm
2⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1888

C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1888 CREDAT:275457 /prefetch:2
3⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:972

C:\Windows\SysWOW64\cmd.exe
cmd.exe /C del /Q /F "C:\Users\Admin\AppData\Local\Temp\33b62b95281bb0ecbad2523bb99e4853fd516044b8f2b42ef4a1e29903e7bd0f.exe"
2⤵
- Deletes itself
PID:1520

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:240

C:\Windows\system32\taskeng.exe
taskeng.exe {96260CD4-CB41-40EC-B6BB-C8CD19D0D8C7} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:320

C:\Windows\system32\vssadmin.exe
C:\Windows\system32\vssadmin.exe Delete Shadows /Quiet /All
2⤵
- Interacts with shadow copies
PID:384

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- Suspicious use of FindShellTrayWindow
PID:1488

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File Deletion

2

T1107

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

2

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Inhibit System Recovery

2

T1490

Defacement

1

T1491

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Downloads

C:\Users\Admin\Desktop\ykcol.bmp
Filesize
3.8MB

MD5
1cbf381cd00ba543998801e3635c5b26

SHA1
9db2bcea430426d07ad009e2819ad0340753e1fd

SHA256
fd148293071bec9795499f098b83dbd1bafe4e93f1b0e8d355f32f54026aa3b3

SHA512
1b89dfc3d39f27b4674dcc9526e2ae72bc16ce5ca9fc1fb652e28c79b956c863fe37f904dfc59e836bd32eaf6699408f5e7923a6a57dad91bc835acde2bb81ac

Download Submit
C:\Users\Admin\Desktop\ykcol.htm
Filesize
8KB

MD5
65b3437eb4bbe80017f4d6afa83d8d2d

SHA1
06c2625cc9b5639e8f625dbf99939288e54373bb

SHA256
68f2e17dcf0b01736871ad05d8abbf3477bf4620b73ca5e0dc6d9a271c0505b1

SHA512
0b0b11c759eaa8e4109d529a99ac9a374be65c5affc0cd9a454725c9e58ea920a546dd17bfdbbaac008002b4351d4b95e3f8978d7532ec30a190f876a87de6fd

Download Submit
memory/384-57-0x0000000000000000-mapping.dmp

Download
memory/1228-54-0x0000000000400000-0x0000000000494000-memory.dmp

Filesize
592KB

Download
memory/1228-55-0x0000000000400000-0x0000000000494000-memory.dmp

Filesize
592KB

Download
memory/1228-56-0x00000000751C1000-0x00000000751C3000-memory.dmp

Filesize
8KB

Download
memory/1520-59-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads