bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9

General

Target

bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe
Size

176KB
MD5

26f91937d7f3eb1376fe721af82a9fe0
SHA1

848bd0fa61ab6340b804b42c233c76de4d7441d9
SHA256

bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9
SHA512

ddb18a392547c3b4ededbf3e263f8b9a2782845a577bbf9fe10d9744807cb296d2bd126b03f86e1e7739d34de32427774e4411cf430ac15902650f6459c10a7b
SSDEEP

3072:df04IcfpHlp1D2KcwjIU2aTObcpT/pHkEAbN/yK/fObT/bGiCV/COqoSQ1iBuAZI:904PfpHlp1KKcwjIDaTObcZ/pHkMK/fn

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Processes:

rksiz.exebf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	rksiz.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe

Executes dropped EXE 1 IoCs

Processes:

rksiz.exe

pid process

776 rksiz.exe

pid	process
776	rksiz.exe

Loads dropped DLL 2 IoCs

Processes:

bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe

pid	process
1252	bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe
1252	bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe

Adds Run key to start application 2 TTPs 47 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

rksiz.exebf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /d"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /I"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /P"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /M"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /j"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /G"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /h"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /k"	rksiz.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\	bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /F"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /J"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /g"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /s"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /z"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /p"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /Y"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /T"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /H"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /o"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /c"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /Q"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /S"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /W"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /d"	bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /K"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /X"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /m"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /v"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /r"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /D"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /y"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /E"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /L"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /R"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /i"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /w"	rksiz.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /Z"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /e"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /A"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /b"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /n"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /f"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /q"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /t"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /V"	rksiz.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\rksiz = "C:\\Users\\Admin\\rksiz.exe /a"	rksiz.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 64 IoCs

Processes:

bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exerksiz.exe

pid	process
1252	bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe
776	rksiz.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exerksiz.exe

pid process

1252 bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe
776 rksiz.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe

description	pid	process	target process
PID 1252 wrote to memory of 776	1252	bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe	rksiz.exe
PID 1252 wrote to memory of 776	1252	bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe	rksiz.exe
PID 1252 wrote to memory of 776	1252	bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe	rksiz.exe
PID 1252 wrote to memory of 776	1252	bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe	rksiz.exe

C:\Users\Admin\AppData\Local\Temp\bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe
"C:\Users\Admin\AppData\Local\Temp\bf0c00dfa8272340f3516e78516d8c6e9ea796777031e884c746e602b80b04e9.exe"
1⤵
- Modifies visiblity of hidden/system files in Explorer
- Loads dropped DLL
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1252

C:\Users\Admin\rksiz.exe
"C:\Users\Admin\rksiz.exe"
2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:776

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

1

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\rksiz.exe

Filesize
176KB

MD5
b691656b194a6ba9afaf9790157e9ccf

SHA1
cccf226ec09d406adac031250ef4f33e0ebd93bd

SHA256
654225f3d8f6ed2c5a1216b2953e40275689f2678454a13c532d06a4db5a1d56

SHA512
eaf5dc232e8cf51c36d05e22c113686a901f11353b549f030e186cb1a9b0b27cc945a0dc6372df54acb3f5da87cf2f5f9bfda3148b19588274ad1e41b2ad085b

Download Submit
C:\Users\Admin\rksiz.exe

Filesize
176KB

MD5
b691656b194a6ba9afaf9790157e9ccf

SHA1
cccf226ec09d406adac031250ef4f33e0ebd93bd

SHA256
654225f3d8f6ed2c5a1216b2953e40275689f2678454a13c532d06a4db5a1d56

SHA512
eaf5dc232e8cf51c36d05e22c113686a901f11353b549f030e186cb1a9b0b27cc945a0dc6372df54acb3f5da87cf2f5f9bfda3148b19588274ad1e41b2ad085b

Download Submit
\Users\Admin\rksiz.exe

Filesize
176KB

MD5
b691656b194a6ba9afaf9790157e9ccf

SHA1
cccf226ec09d406adac031250ef4f33e0ebd93bd

SHA256
654225f3d8f6ed2c5a1216b2953e40275689f2678454a13c532d06a4db5a1d56

SHA512
eaf5dc232e8cf51c36d05e22c113686a901f11353b549f030e186cb1a9b0b27cc945a0dc6372df54acb3f5da87cf2f5f9bfda3148b19588274ad1e41b2ad085b

Download Submit
\Users\Admin\rksiz.exe

Filesize
176KB

MD5
b691656b194a6ba9afaf9790157e9ccf

SHA1
cccf226ec09d406adac031250ef4f33e0ebd93bd

SHA256
654225f3d8f6ed2c5a1216b2953e40275689f2678454a13c532d06a4db5a1d56

SHA512
eaf5dc232e8cf51c36d05e22c113686a901f11353b549f030e186cb1a9b0b27cc945a0dc6372df54acb3f5da87cf2f5f9bfda3148b19588274ad1e41b2ad085b

Download Submit
memory/776-59-0x0000000000000000-mapping.dmp

Download
memory/1252-56-0x0000000076381000-0x0000000076383000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads