kutaki | a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27

Resubmissions

04-02-2024 18:03

240204-wm61nshghj 10

05-08-2020 11:30

200805-k11vh8yarj 10

Analysis

max time kernel
150s
max time network
120s
platform
windows10_x64
resource
win10
submitted
05-08-2020 11:30

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General

Target

a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe
Size

743KB
MD5

3636153d8fdc065fc40aae264f39eb7f
SHA1

3f62736088952839a2379bb33575fc1e963e784e
SHA256

a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27
SHA512

96337dc43b446f6a2793715a8716a4ee688f9e0587020554dcc9a65c21a0b3ea54a2cf29954e23485b0fc29897a84d73a8df560d8b3dfc6f1807b7ca2da8a2b8

Score

10^/10

stealer keylogger kutaki

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/0x000500000000067f-4.dat	family_kutaki
behavioral2/files/0x000500000000067f-5.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
3856	lunlerio.exe

Drops startup file 2 IoCs

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

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	lunlerio.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum\0	lunlerio.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
3920	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe
3920	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe
3920	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe
3856	lunlerio.exe
3856	lunlerio.exe
3856	lunlerio.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3920 wrote to memory of 3440	3920	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe	67
PID 3920 wrote to memory of 3440	3920	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe	67
PID 3920 wrote to memory of 3440	3920	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe	67
PID 3920 wrote to memory of 3856	3920	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe	69
PID 3920 wrote to memory of 3856	3920	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe	69
PID 3920 wrote to memory of 3856	3920	a6f34907ae34f485e4091ba122886cb32a2cc27856d580fe289c8861d6241f27.exe	69

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:3920
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:3440
- 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:3856

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

memory/3856-8-0x00000000033E0000-0x00000000033E1000-memory.dmp

Filesize
4KB

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