78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51

General

Target

78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe
Size

554KB
MD5

9038c0bfcb41767a7b8d1a46652d53e2
SHA1

372dea083bcbbe7f494992f92b5559cf2dab11c7
SHA256

78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51
SHA512

66c153d4e7de01de62775eb57f839f72bb185cb76e82cc12ff875287232fb8d9798bef909d94f10e43f766c0317988a98aa03ff7444b1ba97a5aeebe0858aa3d

Score

9^/10

evasion persistence ransomware trojan

Malware Config

Signatures

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

explorer.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ygewamik = "\"C:\\Windows\\yzewewux.exe\""	explorer.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe

description	pid	process	target process
PID 1040 set thread context of 1464	1040	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe
PID 1464 set thread context of 2020	1464	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	explorer.exe

Drops file in Windows directory 2 IoCs

Processes:

explorer.exe

description ioc process

File opened for modification C:\Windows\yzewewux.exe explorer.exe
File created C:\Windows\yzewewux.exe explorer.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

1688 vssadmin.exe

description	ioc	process
File opened for modification	C:\Windows\yzewewux.exe	explorer.exe
File created	C:\Windows\yzewewux.exe	explorer.exe

pid	process
1688	vssadmin.exe

Modifies Internet Explorer Phishing Filter 1 TTPs 3 IoCs

Modify Registry

T1112

Processes:

explorer.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\PhishingFilter	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV8 = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV9 = "0"	explorer.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe

pid process

1040 78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 1768 vssvc.exe
Token: SeRestorePrivilege 1768 vssvc.exe
Token: SeAuditPrivilege 1768 vssvc.exe

pid	process
1040	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe

description	pid	process
Token: SeBackupPrivilege	1768	vssvc.exe
Token: SeRestorePrivilege	1768	vssvc.exe
Token: SeAuditPrivilege	1768	vssvc.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exeexplorer.exe

description	pid	process	target process
PID 1040 wrote to memory of 1464	1040	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe
PID 1040 wrote to memory of 1464	1040	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe
PID 1040 wrote to memory of 1464	1040	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe
PID 1040 wrote to memory of 1464	1040	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe
PID 1040 wrote to memory of 1464	1040	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe
PID 1040 wrote to memory of 1464	1040	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe
PID 1040 wrote to memory of 1464	1040	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe
PID 1040 wrote to memory of 1464	1040	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe
PID 1040 wrote to memory of 1464	1040	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe
PID 1040 wrote to memory of 1464	1040	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe
PID 1040 wrote to memory of 1464	1040	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe
PID 1464 wrote to memory of 2020	1464	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	explorer.exe
PID 1464 wrote to memory of 2020	1464	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	explorer.exe
PID 1464 wrote to memory of 2020	1464	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	explorer.exe
PID 1464 wrote to memory of 2020	1464	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	explorer.exe
PID 1464 wrote to memory of 2020	1464	78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe	explorer.exe
PID 2020 wrote to memory of 1688	2020	explorer.exe	vssadmin.exe
PID 2020 wrote to memory of 1688	2020	explorer.exe	vssadmin.exe
PID 2020 wrote to memory of 1688	2020	explorer.exe	vssadmin.exe
PID 2020 wrote to memory of 1688	2020	explorer.exe	vssadmin.exe

C:\Users\Admin\AppData\Local\Temp\78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe
"C:\Users\Admin\AppData\Local\Temp\78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1040

C:\Users\Admin\AppData\Local\Temp\78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe
"C:\Users\Admin\AppData\Local\Temp\78b55ce394011b701be630417507f517df542361758ca2ab4c135023e2566c51.exe"
2⤵
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1464

C:\Windows\SysWOW64\explorer.exe
"C:\Windows\system32\explorer.exe"
3⤵
- Adds Run key to start application
- Drops file in Windows directory
- Modifies Internet Explorer Phishing Filter
- Suspicious use of WriteProcessMemory
PID:2020

C:\Windows\SysWOW64\vssadmin.exe
vssadmin.exe Delete Shadows /All /Quiet
4⤵
- Interacts with shadow copies
PID:1688

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1768

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

File Deletion

2

T1107

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Inhibit System Recovery

2

T1490

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Downloads

C:\ProgramData\ywynugoxasijikec\01000000
Filesize
554KB

MD5
2bf0069d0713d3c61f771c09b5c74c20

SHA1
100a14819b6411d4ccad864ce0b075e1dd62d5b8

SHA256
816793614ab897abdc53cf699a8d90696dd215c334526f845ff817ddf029c2a9

SHA512
33e6de30a49bb34d9cb087db00cf9f2ced2e5323aefc42f4681e935389cd2cd9ecde478cf64a9f012076709238019a0738f3cce97a0c2dab8e3b3db7bba1ef7d

Download Submit
memory/1040-54-0x0000000076811000-0x0000000076813000-memory.dmp

Filesize
8KB

Download
memory/1464-66-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1464-55-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1464-61-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1464-62-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1464-64-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1464-65-0x000000000040A61E-mapping.dmp

Download
memory/1464-58-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1464-68-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1464-60-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1464-75-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1688-78-0x0000000000000000-mapping.dmp

Download
memory/2020-73-0x000000000009A160-mapping.dmp

Download
memory/2020-71-0x0000000000080000-0x00000000000BC000-memory.dmp

Filesize
240KB

Download
memory/2020-76-0x0000000074FE1000-0x0000000074FE3000-memory.dmp

Filesize
8KB

Download
memory/2020-69-0x0000000000080000-0x00000000000BC000-memory.dmp

Filesize
240KB

Download
memory/2020-79-0x0000000000080000-0x00000000000BC000-memory.dmp

Filesize
240KB

Download
memory/2020-80-0x00000000728F1000-0x00000000728F3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads