4bcbb8983fe7425976c5a1789deff73fb138e80981f5ebfef1f835bcc6757760

Analysis

max time kernel
149s
max time network
24s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:18

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General

Target

f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe
Size

373KB
MD5

1390a05960fe6acd3fd25279513346f0
SHA1

c65393f72d9e00c770ba3ef393701bc87e13b938
SHA256

f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5
SHA512

90c3d8d61687e3bccd9e6e15f6c5f3db6770471878b452f9a11874ea70391eac5639424fd3f4a03de7729d642355fb2e6e0c4e65e3e4765cb76111a7b2de5bcc
SSDEEP

6144:tyMIULPy/x3xUArN62f7GU7njrbma/3LaQURrM2TuP6zJcW:XDy/xhUAtf7tjrbma7OJxuSzp

Score

7^/10

discovery persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2984	grotesque.exe

Loads dropped DLL 2 IoCs

pid	Process
804	f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe
804	f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\kokobaka = "C:\\Users\\Admin\\AppData\\Roaming\\future\\grotesque.exe"	f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\AudioClient	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2984 set thread context of 2124	2984	grotesque.exe	31

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Microsoft.NET\Framework\v2.0.50727\dtmp1.tmp	vbc.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	grotesque.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2124	vbc.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 804 wrote to memory of 2984	804	f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe	30
PID 804 wrote to memory of 2984	804	f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe	30
PID 804 wrote to memory of 2984	804	f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe	30
PID 804 wrote to memory of 2984	804	f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe	30
PID 2984 wrote to memory of 2124	2984	grotesque.exe	31
PID 2984 wrote to memory of 2124	2984	grotesque.exe	31
PID 2984 wrote to memory of 2124	2984	grotesque.exe	31
PID 2984 wrote to memory of 2124	2984	grotesque.exe	31
PID 2984 wrote to memory of 2124	2984	grotesque.exe	31
PID 2984 wrote to memory of 2124	2984	grotesque.exe	31
PID 2984 wrote to memory of 2124	2984	grotesque.exe	31
PID 2984 wrote to memory of 2124	2984	grotesque.exe	31
PID 2984 wrote to memory of 2124	2984	grotesque.exe	31
PID 2984 wrote to memory of 2124	2984	grotesque.exe	31

C:\Users\Admin\AppData\Local\Temp\f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe
"C:\Users\Admin\AppData\Local\Temp\f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:804
- C:\Users\Admin\AppData\Roaming\future\grotesque.exe
  "C:\Users\Admin\AppData\Roaming\future\grotesque.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2984
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    3⤵
    - Adds Run key to start application
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:2124

Network

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

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Roaming\future\grotesque.exe

Filesize
374KB

MD5
b7c799111365f587e44c2148b77eb40f

SHA1
1ff8ebc720d8e09366331c98caac3cb986382d13

SHA256
42bd5854cdf3cbc276574a8064b6bac6f48227e6b4026b405e6f0f3b69d2d474

SHA512
cf93e2ae5bbf7c1a018c07b6d9c4ebd6890a248a44436907fdb916e9218ca318adcdad8afe224dd3647544e9b4e40a4dfca6939598ecbc5e7546e0df13117601

Download Submit
memory/804-16-0x0000000074C50000-0x00000000751FB000-memory.dmp

Filesize
5.7MB

Download
memory/804-1-0x0000000074C50000-0x00000000751FB000-memory.dmp

Filesize
5.7MB

Download
memory/804-2-0x0000000074C50000-0x00000000751FB000-memory.dmp

Filesize
5.7MB

Download
memory/804-0-0x0000000074C51000-0x0000000074C52000-memory.dmp

Filesize
4KB

Download
memory/2124-20-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/2124-18-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/2124-17-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/2124-19-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/2124-21-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/2124-23-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/2124-24-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/2984-15-0x0000000074C50000-0x00000000751FB000-memory.dmp

Filesize
5.7MB

Download
memory/2984-14-0x0000000074C50000-0x00000000751FB000-memory.dmp

Filesize
5.7MB

Download
memory/2984-22-0x0000000074C50000-0x00000000751FB000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads