kutaki | eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0

Analysis

max time kernel
189s
max time network
192s
platform
windows10-2004_x64
resource
win10v2004-20220721-en
resource tags

arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
submitted
31/07/2022, 22:42

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General

Target
eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0.exe
Size 816KB
Sample220731-2mvwasbdh5
SHA256 eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0
MD5 91b01051c2b3fbb0507e76ec0bb8f329
SHA1 49a1b1c6b58e29f842e54a4f03e5330b7f818fb6
SHA512 86f2d4941e1d779247c7929d0dd87bc4197332ce4ef33fbb0baa85f1476e78c5dd599c454ad45edfd39ccf928e6a42620c6b594af473845f296e9496376942eb
MD5 SHA1 SHA512

Score

10^/10

kutaki keylogger stealer

Malware Config

Signatures

Kutaki
Information stealer and keylogger that hides inside legitimate Visual Basic applications.
stealer keylogger kutaki

Kutaki Executable 2 IoCs

resource	yara_rule
behavioral2/files/0x000a000000022d74-134.dat	family_kutaki
behavioral2/files/0x000a000000022d74-135.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
4636	roaousch.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\roaousch.exe	eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\roaousch.exe	eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	roaousch.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	roaousch.exe

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
1008	eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0.exe
1008	eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0.exe
1008	eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0.exe
4636	roaousch.exe
4636	roaousch.exe
4636	roaousch.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1008 wrote to memory of 3640	1008	eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0.exe	82
PID 1008 wrote to memory of 3640	1008	eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0.exe	82
PID 1008 wrote to memory of 3640	1008	eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0.exe	82
PID 1008 wrote to memory of 4636	1008	eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0.exe	84
PID 1008 wrote to memory of 4636	1008	eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0.exe	84
PID 1008 wrote to memory of 4636	1008	eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0.exe	84

C:\Users\Admin\AppData\Local\Temp\eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0.exe
"C:\Users\Admin\AppData\Local\Temp\eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1008
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:3640
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\roaousch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\roaousch.exe"
  2⤵
  - Executes dropped EXE
  - Maps connected drives based on registry
  - Suspicious use of SetWindowsHookEx
  PID:4636

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

roaousch.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\roaousch.exe
Size 816KB
SHA256 eff15e66863ace3fd44f4fa3fdbe15a15d29b750efe97224134287e097ada5a0
MD5 91b01051c2b3fbb0507e76ec0bb8f329
SHA1 49a1b1c6b58e29f842e54a4f03e5330b7f818fb6
SHA512 86f2d4941e1d779247c7929d0dd87bc4197332ce4ef33fbb0baa85f1476e78c5dd599c454ad45edfd39ccf928e6a42620c6b594af473845f296e9496376942eb
SSDEEP 24576:HD7afb2MJMJkmryhVG96r1/kGlVZshDhwp:HD7aikHhU9E19lPshwp
MD5 SHA1 SHA512 SSDEEP

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