kutaki | 541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b

General

Target

541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe
Size

754KB
MD5

cc3dea0182a77c7ca10925e2c180bc62
SHA1

537cd49fa4abf265b69d9d0de982373544c643fc
SHA256

541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b
SHA512

99655f1a80a9aacb5f77917700f4303a53368e62d7807196b6e5fa917a40382523ea9ab42a81ba66d7c2bab12ff291bd2efc0399922ae578f8332e982fda40e0
SSDEEP

12288:K39b2oWvRykNICNEZjwJxtk46A9jmP/uhu/yMS08CkntxYRcBAL:KeNIuEZjqxVfmP/UDMS08Ckn3A

Score

10^/10

kutaki keylogger stealer

Malware Config

Extracted

Family

kutaki

C2

http://newlinkwotolove.club/love/three.php

Signatures

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

Kutaki Executable 1 IoCs

Processes:

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

Drops startup file 2 IoCs

Processes:

541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\risbwsfk.exe	541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\risbwsfk.exe	541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe

Executes dropped EXE 1 IoCs

Processes:

risbwsfk.exe

pid process

2792 risbwsfk.exe

pid	process
2792	risbwsfk.exe

Loads dropped DLL 2 IoCs

Processes:

541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe

pid	process
2288	541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe
2288	541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 2 IoCs

adware spyware

Modify Registry

T1112

Processes:

541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exerisbwsfk.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000\Software\Microsoft\Internet Explorer\Main	541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe
Key created	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000\Software\Microsoft\Internet Explorer\Main	risbwsfk.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

DllHost.exe

pid process

2920 DllHost.exe

pid	process
2920	DllHost.exe

Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exerisbwsfk.exe

pid	process
2288	541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe
2288	541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe
2288	541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe
2792	risbwsfk.exe
2792	risbwsfk.exe
2792	risbwsfk.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe

description	pid	process	target process
PID 2288 wrote to memory of 2300	2288	541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe	cmd.exe
PID 2288 wrote to memory of 2300	2288	541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe	cmd.exe
PID 2288 wrote to memory of 2300	2288	541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe	cmd.exe
PID 2288 wrote to memory of 2300	2288	541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe	cmd.exe
PID 2288 wrote to memory of 2792	2288	541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe	risbwsfk.exe
PID 2288 wrote to memory of 2792	2288	541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe	risbwsfk.exe
PID 2288 wrote to memory of 2792	2288	541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe	risbwsfk.exe
PID 2288 wrote to memory of 2792	2288	541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe	risbwsfk.exe

C:\Users\Admin\AppData\Local\Temp\541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe
"C:\Users\Admin\AppData\Local\Temp\541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2288

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp
2⤵
PID:2300

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\risbwsfk.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\risbwsfk.exe"
2⤵
- Executes dropped EXE
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:2792

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- Suspicious use of FindShellTrayWindow
PID:2920

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\528EVS6A\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\528EVS6A\httpErrorPagesScripts[2]
Filesize
8KB

MD5
3f57b781cb3ef114dd0b665151571b7b

SHA1
ce6a63f996df3a1cccb81720e21204b825e0238c

SHA256
46e019fa34465f4ed096a9665d1827b54553931ad82e98be01edb1ddbc94d3ad

SHA512
8cbf4ef582332ae7ea605f910ad6f8a4bc28513482409fa84f08943a72cac2cf0fa32b6af4c20c697e1fac2c5ba16b5a64a23af0c11eefbf69625b8f9f90c8fa

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\OV51DDG5\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\OV51DDG5\dnserrordiagoff[1]
Filesize
1KB

MD5
47f581b112d58eda23ea8b2e08cf0ff0

SHA1
6ec1df5eaec1439573aef0fb96dabfc953305e5b

SHA256
b1c947d00db5fce43314c56c663dbeae0ffa13407c9c16225c17ccefc3afa928

SHA512
187383eef3d646091e9f68eff680a11c7947b3d9b54a78cc6de4a04629d7037e9c97673ac054a6f1cf591235c110ca181a6b69ecba0e5032168f56f4486fff92

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\risbwsfk.exe
Filesize
754KB

MD5
cc3dea0182a77c7ca10925e2c180bc62

SHA1
537cd49fa4abf265b69d9d0de982373544c643fc

SHA256
541ce09cec54e8df1f14a5e25064929e3f3c151f0d68dd6968d229668443444b

SHA512
99655f1a80a9aacb5f77917700f4303a53368e62d7807196b6e5fa917a40382523ea9ab42a81ba66d7c2bab12ff291bd2efc0399922ae578f8332e982fda40e0

Download Submit
memory/2288-45-0x0000000004370000-0x00000000053D2000-memory.dmp

Filesize
16.4MB

Download
memory/2288-60-0x0000000005A10000-0x0000000005E22000-memory.dmp

Filesize
4.1MB

Download
memory/2300-52-0x0000000000580000-0x0000000000582000-memory.dmp

Filesize
8KB

Download
memory/2792-82-0x0000000004230000-0x0000000005292000-memory.dmp

Filesize
16.4MB

Download
memory/2920-53-0x0000000000320000-0x0000000000322000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads