kutaki | ec5a7e9539938fcb1c2feadf59afa9e864144e52aeb6a4715cc50f188c72c053

Resubmissions

08-08-2023 17:00

230808-vjbjxsfg5y 10

08-08-2023 13:18

230808-qkbh4acf95 10

Analysis

max time kernel
150s
max time network
127s
platform
windows7_x64
resource
win7-20230712-en
resource tags

arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
submitted
08-08-2023 13:18

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General

Target

Income-Tax.exe
Size

529KB
MD5

8a182209d4a6fea9223298590e59bd7e
SHA1

909b60f35926c3173d36ce80127fb7792ef86402
SHA256

ec5a7e9539938fcb1c2feadf59afa9e864144e52aeb6a4715cc50f188c72c053
SHA512

425d15a1e9c9967514edaad9357182fe0ef5b392d072cf300bdf02e9927687adbc00c45b7345aae481e38dbbf4a4a3152756cb89e99a93f252c7cc740746ed38
SSDEEP

12288:TOJHqVR3f53gG46A9jmP/uhu/yMS08CkntxYR7L:68VRvWRfmP/UDMS08Ckn32

Score

10^/10

kutaki keylogger stealer

Malware Config

Extracted

Family

kutaki

http://waaatlink.xyz/hello/son.php

Signatures

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

Drops startup file 2 IoCs

Processes:

Income-Tax.exe

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\idbflyfk.exe	Income-Tax.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\idbflyfk.exe	Income-Tax.exe

Executes dropped EXE 1 IoCs

Processes:

idbflyfk.exe

pid	Process
2816	idbflyfk.exe

Loads dropped DLL 2 IoCs

Processes:

Income-Tax.exe

pid	Process
2576	Income-Tax.exe
2576	Income-Tax.exe

Modifies Internet Explorer settings 1 TTPs 2 IoCs

adware spyware

Modify Registry

T1112

Processes:

Income-Tax.exeidbflyfk.exe

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1024678951-1535676557-2778719785-1000\Software\Microsoft\Internet Explorer\Main	Income-Tax.exe
Key created	\REGISTRY\USER\S-1-5-21-1024678951-1535676557-2778719785-1000\Software\Microsoft\Internet Explorer\Main	idbflyfk.exe

Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

Income-Tax.exeidbflyfk.exe

pid	Process
2576	Income-Tax.exe
2576	Income-Tax.exe
2576	Income-Tax.exe
2816	idbflyfk.exe
2816	idbflyfk.exe
2816	idbflyfk.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

Income-Tax.exe

description	pid	Process	procid_target
PID 2576 wrote to memory of 2972	2576	Income-Tax.exe	28
PID 2576 wrote to memory of 2972	2576	Income-Tax.exe	28
PID 2576 wrote to memory of 2972	2576	Income-Tax.exe	28
PID 2576 wrote to memory of 2972	2576	Income-Tax.exe	28
PID 2576 wrote to memory of 2816	2576	Income-Tax.exe	30
PID 2576 wrote to memory of 2816	2576	Income-Tax.exe	30
PID 2576 wrote to memory of 2816	2576	Income-Tax.exe	30
PID 2576 wrote to memory of 2816	2576	Income-Tax.exe	30

C:\Users\Admin\AppData\Local\Temp\Income-Tax.exe
"C:\Users\Admin\AppData\Local\Temp\Income-Tax.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2576
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:2972
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\idbflyfk.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\idbflyfk.exe"
  2⤵
  - Executes dropped EXE
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:2816

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\64WRFCMO\errorPageStrings[1]

Filesize
2KB

MD5
e3e4a98353f119b80b323302f26b78fa

SHA1
20ee35a370cdd3a8a7d04b506410300fd0a6a864

SHA256
9466d620dc57835a2475f8f71e304f54aee7160e134ba160baae0f19e5e71e66

SHA512
d8e4d73c76804a5abebd5dbc3a86dcdb6e73107b873175a8de67332c113fb7c4899890bf7972e467866fa4cd100a7e2a10a770e5a9c41cbf23b54351b771dcee

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\BNJTQ62U\NewErrorPageTemplate[1]

Filesize
1KB

MD5
cdf81e591d9cbfb47a7f97a2bcdb70b9

SHA1
8f12010dfaacdecad77b70a3e781c707cf328496

SHA256
204d95c6fb161368c795bb63e538fe0b11f9e406494bb5758b3b0d60c5f651bd

SHA512
977dcc2c6488acaf0e5970cef1a7a72c9f9dc6bb82da54f057e0853c8e939e4ab01b163eb7a5058e093a8bc44ecad9d06880fdc883e67e28ac67fee4d070a4cc

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\BNJTQ62U\dnserrordiagoff[1]

Filesize
1KB

MD5
47f581b112d58eda23ea8b2e08cf0ff0

SHA1
6ec1df5eaec1439573aef0fb96dabfc953305e5b

SHA256
b1c947d00db5fce43314c56c663dbeae0ffa13407c9c16225c17ccefc3afa928

SHA512
187383eef3d646091e9f68eff680a11c7947b3d9b54a78cc6de4a04629d7037e9c97673ac054a6f1cf591235c110ca181a6b69ecba0e5032168f56f4486fff92

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\RL08PF7G\httpErrorPagesScripts[1]

Filesize
8KB

MD5
3f57b781cb3ef114dd0b665151571b7b

SHA1
ce6a63f996df3a1cccb81720e21204b825e0238c

SHA256
46e019fa34465f4ed096a9665d1827b54553931ad82e98be01edb1ddbc94d3ad

SHA512
8cbf4ef582332ae7ea605f910ad6f8a4bc28513482409fa84f08943a72cac2cf0fa32b6af4c20c697e1fac2c5ba16b5a64a23af0c11eefbf69625b8f9f90c8fa

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\idbflyfk.exe

Filesize
529KB

MD5
8a182209d4a6fea9223298590e59bd7e

SHA1
909b60f35926c3173d36ce80127fb7792ef86402

SHA256
ec5a7e9539938fcb1c2feadf59afa9e864144e52aeb6a4715cc50f188c72c053

SHA512
425d15a1e9c9967514edaad9357182fe0ef5b392d072cf300bdf02e9927687adbc00c45b7345aae481e38dbbf4a4a3152756cb89e99a93f252c7cc740746ed38

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\idbflyfk.exe

Filesize
529KB

MD5
8a182209d4a6fea9223298590e59bd7e

SHA1
909b60f35926c3173d36ce80127fb7792ef86402

SHA256
ec5a7e9539938fcb1c2feadf59afa9e864144e52aeb6a4715cc50f188c72c053

SHA512
425d15a1e9c9967514edaad9357182fe0ef5b392d072cf300bdf02e9927687adbc00c45b7345aae481e38dbbf4a4a3152756cb89e99a93f252c7cc740746ed38

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\idbflyfk.exe

Filesize
529KB

MD5
8a182209d4a6fea9223298590e59bd7e

SHA1
909b60f35926c3173d36ce80127fb7792ef86402

SHA256
ec5a7e9539938fcb1c2feadf59afa9e864144e52aeb6a4715cc50f188c72c053

SHA512
425d15a1e9c9967514edaad9357182fe0ef5b392d072cf300bdf02e9927687adbc00c45b7345aae481e38dbbf4a4a3152756cb89e99a93f252c7cc740746ed38

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\idbflyfk.exe

Filesize
529KB

MD5
8a182209d4a6fea9223298590e59bd7e

SHA1
909b60f35926c3173d36ce80127fb7792ef86402

SHA256
ec5a7e9539938fcb1c2feadf59afa9e864144e52aeb6a4715cc50f188c72c053

SHA512
425d15a1e9c9967514edaad9357182fe0ef5b392d072cf300bdf02e9927687adbc00c45b7345aae481e38dbbf4a4a3152756cb89e99a93f252c7cc740746ed38

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\idbflyfk.exe

Filesize
529KB

MD5
8a182209d4a6fea9223298590e59bd7e

SHA1
909b60f35926c3173d36ce80127fb7792ef86402

SHA256
ec5a7e9539938fcb1c2feadf59afa9e864144e52aeb6a4715cc50f188c72c053

SHA512
425d15a1e9c9967514edaad9357182fe0ef5b392d072cf300bdf02e9927687adbc00c45b7345aae481e38dbbf4a4a3152756cb89e99a93f252c7cc740746ed38

Download Submit
memory/2576-56-0x00000000038B0000-0x0000000004912000-memory.dmp

Filesize
16.4MB

Download
memory/2816-84-0x0000000003790000-0x00000000047F2000-memory.dmp

Filesize
16.4MB

Download