81a0fbf5bb98f65c5c7c8140113b555bf3712477163cad9146f2f585cf458cbd

Analysis

max time kernel
240s
max time network
274s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
26/12/2023, 02:26 UTC

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General

Target

4ca1d55fc6c8f36d8e435cf9743b1b2e.exe
Size

24KB
MD5

4ca1d55fc6c8f36d8e435cf9743b1b2e
SHA1

16cb028e0d876d0654b7cec76948b6220b76e583
SHA256

81a0fbf5bb98f65c5c7c8140113b555bf3712477163cad9146f2f585cf458cbd
SHA512

d9b7178a882f4e1e7587314b8a59c98aeec28e56b1c31907288faaf0d83676a5be5429cdaf52930410fd9762b34896f686ff7d5b87e8d2d80e97ae2cb7d63521
SSDEEP

384:E3eVES+/xwGkRKJtCxlM61qmTTMVF9/q5K0:bGS+ZfbJ4xO8qYoA7

Score

6^/10

persistence

Malware Config

Signatures

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Start GeekBuddy = "C:\\Program Files\\Common Files\\Microsoft Shared\\Web Folders\\1033\\spoolsv.exe"	4ca1d55fc6c8f36d8e435cf9743b1b2e.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\Microsoft Shared\Web Folders\1033\spoolsv.exe	4ca1d55fc6c8f36d8e435cf9743b1b2e.exe

Enumerates processes with tasklist 1 TTPs 1 IoCs

Process Discovery

T1057

pid	Process
2016	tasklist.exe

Gathers network information 2 TTPs 2 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
1612	NETSTAT.EXE
1988	ipconfig.exe

Runs net.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2016	tasklist.exe
Token: SeDebugPrivilege	1612	NETSTAT.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3064	4ca1d55fc6c8f36d8e435cf9743b1b2e.exe
3064	4ca1d55fc6c8f36d8e435cf9743b1b2e.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 3064 wrote to memory of 1620	3064	4ca1d55fc6c8f36d8e435cf9743b1b2e.exe	27
PID 3064 wrote to memory of 1620	3064	4ca1d55fc6c8f36d8e435cf9743b1b2e.exe	27
PID 3064 wrote to memory of 1620	3064	4ca1d55fc6c8f36d8e435cf9743b1b2e.exe	27
PID 3064 wrote to memory of 1620	3064	4ca1d55fc6c8f36d8e435cf9743b1b2e.exe	27
PID 1620 wrote to memory of 2908	1620	cmd.exe	29
PID 1620 wrote to memory of 2908	1620	cmd.exe	29
PID 1620 wrote to memory of 2908	1620	cmd.exe	29
PID 1620 wrote to memory of 2908	1620	cmd.exe	29
PID 1620 wrote to memory of 1988	1620	cmd.exe	30
PID 1620 wrote to memory of 1988	1620	cmd.exe	30
PID 1620 wrote to memory of 1988	1620	cmd.exe	30
PID 1620 wrote to memory of 1988	1620	cmd.exe	30
PID 1620 wrote to memory of 2016	1620	cmd.exe	31
PID 1620 wrote to memory of 2016	1620	cmd.exe	31
PID 1620 wrote to memory of 2016	1620	cmd.exe	31
PID 1620 wrote to memory of 2016	1620	cmd.exe	31
PID 1620 wrote to memory of 1660	1620	cmd.exe	36
PID 1620 wrote to memory of 1660	1620	cmd.exe	36
PID 1620 wrote to memory of 1660	1620	cmd.exe	36
PID 1620 wrote to memory of 1660	1620	cmd.exe	36
PID 1660 wrote to memory of 1556	1660	net.exe	33
PID 1660 wrote to memory of 1556	1660	net.exe	33
PID 1660 wrote to memory of 1556	1660	net.exe	33
PID 1660 wrote to memory of 1556	1660	net.exe	33
PID 1620 wrote to memory of 1612	1620	cmd.exe	34
PID 1620 wrote to memory of 1612	1620	cmd.exe	34
PID 1620 wrote to memory of 1612	1620	cmd.exe	34
PID 1620 wrote to memory of 1612	1620	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\4ca1d55fc6c8f36d8e435cf9743b1b2e.exe
"C:\Users\Admin\AppData\Local\Temp\4ca1d55fc6c8f36d8e435cf9743b1b2e.exe"
1⤵
- Adds Run key to start application
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3064
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ver >c:\windows\temp\flash.log & cmd /c set >>c:\windows\temp\flash.log & ipconfig /all >>c:\windows\temp\flash.log & tasklist >>c:\windows\temp\flash.log & net start>>c:\windows\temp\flash.log & netstat -an >>c:\windows\temp\flash.log
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1620
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c set
    3⤵
    PID:2908
- - C:\Windows\SysWOW64\ipconfig.exe
    ipconfig /all
    3⤵
    - Gathers network information
    PID:1988
- - C:\Windows\SysWOW64\tasklist.exe
    tasklist
    3⤵
    - Enumerates processes with tasklist
    - Suspicious use of AdjustPrivilegeToken
    PID:2016
- - C:\Windows\SysWOW64\NETSTAT.EXE
    netstat -an
    3⤵
    - Gathers network information
    - Suspicious use of AdjustPrivilegeToken
    PID:1612
- - C:\Windows\SysWOW64\net.exe
    net start
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1660

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 start
1⤵
PID:1556

Network

DNS

www.kvic.jp

4ca1d55fc6c8f36d8e435cf9743b1b2e.exe

Remote address:

8.8.8.8:53

Request

www.kvic.jp

IN A

Response

No results found

8.8.8.8:53

www.kvic.jp

dns

4ca1d55fc6c8f36d8e435cf9743b1b2e.exe

57 B
107 B
1
1

DNS Request

www.kvic.jp

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Process Discovery

T1057

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\??\c:\windows\temp\flash.log

Filesize
8KB

MD5
01e06d05e9eb3295d4da110f666b6b85

SHA1
d3122cc6d1196dcfd78b3e7a0c11fa707789590c

SHA256
0ef5e03a86df1b029e61c0af50b644236d7e5c1b06263ad0b59a5c9544d4ccc1

SHA512
c7798cd00dd5c7871d37148f6f50a0ac5478e352ef6127afb4b7bd90016e9e868fe875e5c369237a5896c2d9421239c8e93e8a4f01695b67ededf6be7f062aeb

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

DNS Request

MITRE ATT&CK Enterprise v15

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