39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587

General

Target

39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe
Size

184KB
MD5

030b20510ece3ea94c4f7b346ba0fe21
SHA1

16ee6f910e457b28741f1395612bc284f5876232
SHA256

39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587
SHA512

f5998a1a37d69bc5eec6263fb65c1c35cec9f1d4569d4e3a86c64cae801b0e22ac23f695292ca155370aaa7b9a13cadd397819cfd775e3e460d3ee38aac260f0
SSDEEP

3072:uJmlg+HWoYTzCh46Knvmb7/D26ytQlw/Lg5q69srijEIS3A:DGrpz6LKnvmb7/D26yQlw/Lg5qosri/j

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:

bnkuf.exe39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	bnkuf.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe

Executes dropped EXE 1 IoCs

Processes:

bnkuf.exe

pid process

2524 bnkuf.exe

pid	process
2524	bnkuf.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

Processes:

39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe

Adds Run key to start application 2 TTPs 38 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

bnkuf.exe39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /Q"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /k"	bnkuf.exe
Key created	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Software\Microsoft\Windows\CurrentVersion\Run\	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /I"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /h"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /M"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /G"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /e"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /J"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /D"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /V"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /C"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /p"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /Y"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /g"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /X"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /a"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /Z"	39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /r"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /d"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /n"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /F"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /z"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /t"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /v"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /x"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /o"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /w"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /T"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /L"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /N"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /b"	bnkuf.exe
Key created	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Software\Microsoft\Windows\CurrentVersion\Run\	39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /W"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /j"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /c"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /E"	bnkuf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bnkuf = "C:\\Users\\Admin\\bnkuf.exe /A"	bnkuf.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:

39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exebnkuf.exe

pid	process
5020	39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe
5020	39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe
2524	bnkuf.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exebnkuf.exe

pid process

5020 39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe
2524 bnkuf.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe

description	pid	process	target process
PID 5020 wrote to memory of 2524	5020	39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe	bnkuf.exe
PID 5020 wrote to memory of 2524	5020	39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe	bnkuf.exe
PID 5020 wrote to memory of 2524	5020	39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe	bnkuf.exe

C:\Users\Admin\AppData\Local\Temp\39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe
"C:\Users\Admin\AppData\Local\Temp\39578ea855532ce700133663f0d63cd2b758059c12e95aaf0ab915eefac89587.exe"
1⤵
- Modifies visiblity of hidden/system files in Explorer
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5020

C:\Users\Admin\bnkuf.exe
"C:\Users\Admin\bnkuf.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:2524

Network

MITRE ATT&CK Matrix ATT&CK 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

1

T1158

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\bnkuf.exe
Filesize
184KB

MD5
9da016a973b02f477c9ca0d0c044388b

SHA1
1b3697ad51e5e44d9e89d6ea907eb6ad3f9c7018

SHA256
94e8835fe9da166b804c40fd6ac233535f76d76827c665074749f13276f3db32

SHA512
6d8215cb14747d654536c9b968e74bbf53d201048b650c301a1d0d06d134c6517d8514215d012596f2db6d76651d3388e6a8e8473c9329eccfb49c68e871f6f8

Download Submit
C:\Users\Admin\bnkuf.exe
Filesize
184KB

MD5
9da016a973b02f477c9ca0d0c044388b

SHA1
1b3697ad51e5e44d9e89d6ea907eb6ad3f9c7018

SHA256
94e8835fe9da166b804c40fd6ac233535f76d76827c665074749f13276f3db32

SHA512
6d8215cb14747d654536c9b968e74bbf53d201048b650c301a1d0d06d134c6517d8514215d012596f2db6d76651d3388e6a8e8473c9329eccfb49c68e871f6f8

Download Submit
memory/2524-134-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads