ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a

General

Target

ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe
Size

444KB
MD5

53880143631f47c73526dbcb91831198
SHA1

821ae3f70f4697a7c426cccf48914ed76adb15d5
SHA256

ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a
SHA512

6d39d98c3a566bee09cd879dbef74fef41cf9a360c5ae8884de4ae8e6109dadc238005d975021bbeddfe73e38a45fd82f5aaa35572ca3363c87052a5e15e8239
SSDEEP

6144:LY1Y+aAywEnRnei/wK9N58K5rRzZ4aPm2sJKiUY:LGrywkneiICNR5pC41

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Users\\Admin\\AppData\\Roaming\\lsass.exe\""	vbc.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe

Executes dropped EXE 1 IoCs

pid	Process
4752	lsass.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
4296	netsh.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	vbc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSWUpdate = "\"C:\\Users\\Admin\\AppData\\Roaming\\lsass.exe\""	vbc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft Config = "C:\\Users\\Admin\\AppData\\Local\\Temp\\msconfig.exe"	ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run	vbc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSWUpdate = "\"C:\\Users\\Admin\\AppData\\Roaming\\lsass.exe\""	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1664 set thread context of 2180	1664	ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe	80

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\AppCompat\Programs\Amcache.hve.tmp	dw20.exe
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe	lsass.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeRestorePrivilege	5028	dw20.exe
Token: SeBackupPrivilege	5028	dw20.exe
Token: SeBackupPrivilege	5028	dw20.exe
Token: SeBackupPrivilege	5028	dw20.exe
Token: SeBackupPrivilege	5028	dw20.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2180	vbc.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1664 wrote to memory of 2180	1664	ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe	80
PID 1664 wrote to memory of 2180	1664	ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe	80
PID 1664 wrote to memory of 2180	1664	ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe	80
PID 1664 wrote to memory of 2180	1664	ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe	80
PID 1664 wrote to memory of 2180	1664	ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe	80
PID 1664 wrote to memory of 2180	1664	ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe	80
PID 1664 wrote to memory of 2180	1664	ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe	80
PID 1664 wrote to memory of 2180	1664	ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe	80
PID 1664 wrote to memory of 5028	1664	ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe	81
PID 1664 wrote to memory of 5028	1664	ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe	81
PID 1664 wrote to memory of 5028	1664	ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe	81
PID 2180 wrote to memory of 4296	2180	vbc.exe	82
PID 2180 wrote to memory of 4296	2180	vbc.exe	82
PID 2180 wrote to memory of 4296	2180	vbc.exe	82
PID 2180 wrote to memory of 4752	2180	vbc.exe	84
PID 2180 wrote to memory of 4752	2180	vbc.exe	84
PID 2180 wrote to memory of 4752	2180	vbc.exe	84

C:\Users\Admin\AppData\Local\Temp\ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe
"C:\Users\Admin\AppData\Local\Temp\ef17e6c12998899420d6cac9ad16c64e490e156e7041577c7e94be740324f34a.exe"
1⤵
- Drops file in Drivers directory
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1664
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - Modifies WinLogon for persistence
  - Adds Run key to start application
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2180
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\lsass.exe" CityScape Enable
    3⤵
    - Modifies Windows Firewall
    PID:4296
- - C:\Users\Admin\AppData\Roaming\lsass.exe
    /d C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:4752
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
  dw20.exe -x -s 924
  2⤵
  - Drops file in Windows directory
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  PID:5028

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

Winlogon Helper DLL

Privilege Escalation

Defense Evasion

Modify Registry

Scripting

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\lsass.exe

Filesize
1.1MB

MD5
a0776a06c68c2759e639ecc05099b3d3

SHA1
afb581b876abdd5e9723b941be50996226201af3

SHA256
514d43ac00ef9e08ad6fcd3dc282a321cf84801221eb028990a08e2209169574

SHA512
bb43b2b66542bccfb38029514c23b445571d2375e814aaaaaee79891b0dc439e831608bc58192d34f90c2b66b6c36cda503c934baae6aa34d21c415c67436b76

Download Submit
C:\Users\Admin\AppData\Roaming\lsass.exe

Filesize
1.1MB

MD5
a0776a06c68c2759e639ecc05099b3d3

SHA1
afb581b876abdd5e9723b941be50996226201af3

SHA256
514d43ac00ef9e08ad6fcd3dc282a321cf84801221eb028990a08e2209169574

SHA512
bb43b2b66542bccfb38029514c23b445571d2375e814aaaaaee79891b0dc439e831608bc58192d34f90c2b66b6c36cda503c934baae6aa34d21c415c67436b76

Download Submit
memory/1664-132-0x0000000074A00000-0x0000000074FB1000-memory.dmp

Filesize
5.7MB

Download
memory/1664-145-0x0000000074A00000-0x0000000074FB1000-memory.dmp

Filesize
5.7MB

Download
memory/2180-134-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/2180-138-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/2180-144-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads