43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8

General

Target

43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
Size

1019KB
MD5

830360e781e4a3f465b21e0721a67997
SHA1

4b02652641cd98afb43e306da4f607fa3bdd6a27
SHA256

43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8
SHA512

42c88c3c8d8f804526a10c09d18f1375c749b3da5a13d195d053f8720c3b575880186cecd36dc55cbc7d3eda3d109feab30f85d66acea284787453f220b05d59
SSDEEP

12288:rjS3Yvyn/0TvSmqN5944qwsgq0q5L6sq1:ru3Y5v652/wsgL11

Score

10^/10

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 smrss.exe"	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe

Executes dropped EXE 1 IoCs

pid	Process
4512	43240.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\freizer = "C:\\WINDOWS\\system32\\freizer.exe"	reg.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\WINDOWS\\system32\\svchost.exe"	reg.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	reg.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\smrss.exe	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
File opened for modification	C:\Windows\SysWOW64\smrss.exe	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
File created	C:\WINDOWS\SysWOW64\freizer.exe	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe

Drops file in Program Files directory 10 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\IntegratedOffice.exe	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\MavInject32.exe	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
File opened for modification	C:\Program Files\7-Zip\7zFM.exe	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
File opened for modification	C:\Program Files\7-Zip\7zG.exe	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
File opened for modification	C:\Program Files\7-Zip\Uninstall.exe	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\InspectorOfficeGadget.exe	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
File opened for modification	C:\Program Files\7-Zip\7z.exe	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\appvcleaner.exe	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\AppVShNotify.exe	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\OfficeC2RClient.exe	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\WINDOWS\svchost.exe	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4928 wrote to memory of 3396	4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe	84
PID 4928 wrote to memory of 3396	4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe	84
PID 4928 wrote to memory of 3396	4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe	84
PID 4928 wrote to memory of 4660	4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe	87
PID 4928 wrote to memory of 4660	4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe	87
PID 4928 wrote to memory of 4660	4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe	87
PID 3396 wrote to memory of 1312	3396	cmd.exe	88
PID 3396 wrote to memory of 1312	3396	cmd.exe	88
PID 3396 wrote to memory of 1312	3396	cmd.exe	88
PID 4660 wrote to memory of 4628	4660	cmd.exe	89
PID 4660 wrote to memory of 4628	4660	cmd.exe	89
PID 4660 wrote to memory of 4628	4660	cmd.exe	89
PID 4928 wrote to memory of 4512	4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe	90
PID 4928 wrote to memory of 4512	4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe	90
PID 4928 wrote to memory of 4512	4928	43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe	90

C:\Users\Admin\AppData\Local\Temp\43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe
"C:\Users\Admin\AppData\Local\Temp\43f2c9231b7dc2219e240520c058aa5814cb3597c054f76e96066613e36628e8.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4928
- C:\Windows\SysWOW64\cmd.exe
  cmd /c reg ADD HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run /v freizer /t REG_SZ /d C:\WINDOWS\system32\freizer.exe /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3396
- - C:\Windows\SysWOW64\reg.exe
    reg ADD HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run /v freizer /t REG_SZ /d C:\WINDOWS\system32\freizer.exe /f
    3⤵
    - Adds Run key to start application
    PID:1312
- C:\Windows\SysWOW64\cmd.exe
  cmd /c reg ADD HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run /v svchost /t REG_SZ /d C:\WINDOWS\system32\svchost.exe /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4660
- - C:\Windows\SysWOW64\reg.exe
    reg ADD HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run /v svchost /t REG_SZ /d C:\WINDOWS\system32\svchost.exe /f
    3⤵
    - Adds Run key to start application
    PID:4628
- C:\windows\temp\43240.exe
  "C:\windows\temp\43240.exe"
  2⤵
  - Executes dropped EXE
  PID:4512

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

Winlogon Helper DLL

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\Temp\43240.exe

Filesize
90KB

MD5
09ae02badc8b2086b93bf9a8e6e571d9

SHA1
2e11e03477348890d59be465b6ebd57643ba4b2e

SHA256
035314fbb4239808456f30f60a6562a911b55e12a1432bdfe7ef33ae5d1748ec

SHA512
877380540fd8ea834dab3681d7e4920a56458f20048bffcec092daddaca21933faeadb2ce18f22040b2172279c42aa258d39f56decb2a1497db30aa24eaad224

Download Submit
C:\windows\temp\43240.exe

Filesize
90KB

MD5
09ae02badc8b2086b93bf9a8e6e571d9

SHA1
2e11e03477348890d59be465b6ebd57643ba4b2e

SHA256
035314fbb4239808456f30f60a6562a911b55e12a1432bdfe7ef33ae5d1748ec

SHA512
877380540fd8ea834dab3681d7e4920a56458f20048bffcec092daddaca21933faeadb2ce18f22040b2172279c42aa258d39f56decb2a1497db30aa24eaad224

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads