kutaki | 1a3baff7083619571a375795049718bc745e555a25ea3e248848c536671fef35

Analysis

max time kernel
150s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
19/01/2023, 08:14

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General

Target
7ff7b7eedc089b658ba80ec8cb0748f9.exe
Size 453KB
Sample230119-j42fasfd86
SHA256 1a3baff7083619571a375795049718bc745e555a25ea3e248848c536671fef35
MD5 7ff7b7eedc089b658ba80ec8cb0748f9
SHA1 1840814d053eb5327e68db983215316008e84bdb
SHA512 5c370ad1314d4d0c66aad6518b93ecba45835766feabd26bada33e6b6aa4ba68ff766257db0f91f2643a680fbbf061bf99185dfc5e55fec20a9e86c7256b4472
SSDEEP 12288:+U4Tisi246A9jmP/uhu/yMS08CkntxYRPL:lDsKfmP/UDMS08Ckn3K
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

kutaki keylogger stealer

Malware Config

Extracted

Family

kutaki

http://newbosslink.xyz/baba/new4.php

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/0x0009000000022f52-136.dat	family_kutaki
behavioral2/files/0x0009000000022f52-137.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
3624	zbdjegfk.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	cmd.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbdjegfk.exe	7ff7b7eedc089b658ba80ec8cb0748f9.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbdjegfk.exe	7ff7b7eedc089b658ba80ec8cb0748f9.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	mspaint.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4308	mspaint.exe
4308	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
4324	7ff7b7eedc089b658ba80ec8cb0748f9.exe
4324	7ff7b7eedc089b658ba80ec8cb0748f9.exe
4324	7ff7b7eedc089b658ba80ec8cb0748f9.exe
3624	zbdjegfk.exe
3624	zbdjegfk.exe
3624	zbdjegfk.exe
4308	mspaint.exe
4308	mspaint.exe
4308	mspaint.exe
4308	mspaint.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4324 wrote to memory of 5016	4324	7ff7b7eedc089b658ba80ec8cb0748f9.exe	80
PID 4324 wrote to memory of 5016	4324	7ff7b7eedc089b658ba80ec8cb0748f9.exe	80
PID 4324 wrote to memory of 5016	4324	7ff7b7eedc089b658ba80ec8cb0748f9.exe	80
PID 4324 wrote to memory of 3624	4324	7ff7b7eedc089b658ba80ec8cb0748f9.exe	82
PID 4324 wrote to memory of 3624	4324	7ff7b7eedc089b658ba80ec8cb0748f9.exe	82
PID 4324 wrote to memory of 3624	4324	7ff7b7eedc089b658ba80ec8cb0748f9.exe	82
PID 5016 wrote to memory of 4308	5016	cmd.exe	83
PID 5016 wrote to memory of 4308	5016	cmd.exe	83
PID 5016 wrote to memory of 4308	5016	cmd.exe	83

C:\Users\Admin\AppData\Local\Temp\7ff7b7eedc089b658ba80ec8cb0748f9.exe
"C:\Users\Admin\AppData\Local\Temp\7ff7b7eedc089b658ba80ec8cb0748f9.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4324
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp
  2⤵
  - Checks computer location settings
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:5016
- - C:\Windows\SysWOW64\mspaint.exe
    "C:\Windows\system32\mspaint.exe" "C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp"
    3⤵
    - Drops file in Windows directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:4308
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbdjegfk.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbdjegfk.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:3624

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:4540

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

zbdjegfk.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbdjegfk.exe
Size 453KB
SHA256 1a3baff7083619571a375795049718bc745e555a25ea3e248848c536671fef35
MD5 7ff7b7eedc089b658ba80ec8cb0748f9
SHA1 1840814d053eb5327e68db983215316008e84bdb
SHA512 5c370ad1314d4d0c66aad6518b93ecba45835766feabd26bada33e6b6aa4ba68ff766257db0f91f2643a680fbbf061bf99185dfc5e55fec20a9e86c7256b4472
SSDEEP 12288:+U4Tisi246A9jmP/uhu/yMS08CkntxYRPL:lDsKfmP/UDMS08Ckn3K
MD5 SHA1 SHA512 SSDEEP

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zbdjegfk.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbdjegfk.exe
Size 453KB
SHA256 1a3baff7083619571a375795049718bc745e555a25ea3e248848c536671fef35
MD5 7ff7b7eedc089b658ba80ec8cb0748f9
SHA1 1840814d053eb5327e68db983215316008e84bdb
SHA512 5c370ad1314d4d0c66aad6518b93ecba45835766feabd26bada33e6b6aa4ba68ff766257db0f91f2643a680fbbf061bf99185dfc5e55fec20a9e86c7256b4472
SSDEEP 12288:+U4Tisi246A9jmP/uhu/yMS08CkntxYRPL:lDsKfmP/UDMS08Ckn3K
MD5 SHA1 SHA512 SSDEEP

Submit Download