kutaki | a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27

Resubmissions

04-02-2024 18:03

240204-wm61nshghj 10

05-08-2020 11:30

200805-k11vh8yarj 10

Analysis

max time kernel
1803s
max time network
1164s
platform
windows11-21h2_x64
resource
win11-20231215-en
resource tags

arch:x64arch:x86image:win11-20231215-enlocale:en-usos:windows11-21h2-x64system
submitted
04-02-2024 18:03

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General

Target

a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe
Size

743KB
MD5

3636153d8fdc065fc40aae264f39eb7f
SHA1

3f62736088952839a2379bb33575fc1e963e784e
SHA256

a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27
SHA512

96337dc43b446f6a2793715a8716a4ee688f9e0587020554dcc9a65c21a0b3ea54a2cf29954e23485b0fc29897a84d73a8df560d8b3dfc6f1807b7ca2da8a2b8
SSDEEP

12288:pUTq7ZKSOkkd+kQpGPqlSpwhm4s5bsGSCs5:u0ZIkkd+LrlSpnHuGE5

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 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe	family_kutaki

Drops startup file 2 IoCs

Processes:

a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe

Executes dropped EXE 1 IoCs

Processes:

lunlerio.exe

pid process

1720 lunlerio.exe

pid	process
1720	lunlerio.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

Processes:

lunlerio.exe

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

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exelunlerio.exe

pid	process
4004	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe
4004	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe
4004	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe
1720	lunlerio.exe
1720	lunlerio.exe
1720	lunlerio.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe

description	pid	process	target process
PID 4004 wrote to memory of 3316	4004	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe	cmd.exe
PID 4004 wrote to memory of 3316	4004	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe	cmd.exe
PID 4004 wrote to memory of 3316	4004	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe	cmd.exe
PID 4004 wrote to memory of 1720	4004	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe	lunlerio.exe
PID 4004 wrote to memory of 1720	4004	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe	lunlerio.exe
PID 4004 wrote to memory of 1720	4004	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe	lunlerio.exe

C:\Users\Admin\AppData\Local\Temp\a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe
"C:\Users\Admin\AppData\Local\Temp\a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4004

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
2⤵
PID:3316

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe"
2⤵
- Executes dropped EXE
- Maps connected drives based on registry
- Suspicious use of SetWindowsHookEx
PID:1720

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe
Filesize
743KB

MD5
3636153d8fdc065fc40aae264f39eb7f

SHA1
3f62736088952839a2379bb33575fc1e963e784e

SHA256
a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27

SHA512
96337dc43b446f6a2793715a8716a4ee688f9e0587020554dcc9a65c21a0b3ea54a2cf29954e23485b0fc29897a84d73a8df560d8b3dfc6f1807b7ca2da8a2b8

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads