8d4b33f016a0358ab33a61a53be27b775979a15719e2168d66bae6a7a598d2e1

Analysis

max time kernel
150s
max time network
18s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:16

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General

Target

cb64f92875fbd6c7baa1532c3cfd4a9b3a2d12dd50afe5ace3699945d37129a6.exe
Size

373KB
MD5

981a5277b68b4e2425542fb1c82dbb6d
SHA1

2d60d098e2997e78ecb61958de52ac7ddfccf68e
SHA256

cb64f92875fbd6c7baa1532c3cfd4a9b3a2d12dd50afe5ace3699945d37129a6
SHA512

437e8360dfe27f29c91b911f0caa4b3bd62cf500603e4c474cc19db3ec3e6f35825c84ac1eede2f2df6f00a7bbe70c90c9902f30e4159ba575936cde70d3ca6e
SSDEEP

6144:tyMIULPy/x3xUArN62f7GU7njrbma/3LaQURrM2TuP6zJc8:XDy/xhUAtf7tjrbma7OJxuSzH

Score

7^/10

discovery persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2716	grotesque.exe

Loads dropped DLL 2 IoCs

pid	Process
2684	cb64f92875fbd6c7baa1532c3cfd4a9b3a2d12dd50afe5ace3699945d37129a6.exe
2684	cb64f92875fbd6c7baa1532c3cfd4a9b3a2d12dd50afe5ace3699945d37129a6.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\kokobaka = "C:\\Users\\Admin\\AppData\\Roaming\\future\\grotesque.exe"	cb64f92875fbd6c7baa1532c3cfd4a9b3a2d12dd50afe5ace3699945d37129a6.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\AudioClient	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2716 set thread context of 2892	2716	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	cb64f92875fbd6c7baa1532c3cfd4a9b3a2d12dd50afe5ace3699945d37129a6.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
2892	vbc.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2684 wrote to memory of 2716	2684	cb64f92875fbd6c7baa1532c3cfd4a9b3a2d12dd50afe5ace3699945d37129a6.exe	30
PID 2684 wrote to memory of 2716	2684	cb64f92875fbd6c7baa1532c3cfd4a9b3a2d12dd50afe5ace3699945d37129a6.exe	30
PID 2684 wrote to memory of 2716	2684	cb64f92875fbd6c7baa1532c3cfd4a9b3a2d12dd50afe5ace3699945d37129a6.exe	30
PID 2684 wrote to memory of 2716	2684	cb64f92875fbd6c7baa1532c3cfd4a9b3a2d12dd50afe5ace3699945d37129a6.exe	30
PID 2716 wrote to memory of 2892	2716	grotesque.exe	31
PID 2716 wrote to memory of 2892	2716	grotesque.exe	31
PID 2716 wrote to memory of 2892	2716	grotesque.exe	31
PID 2716 wrote to memory of 2892	2716	grotesque.exe	31
PID 2716 wrote to memory of 2892	2716	grotesque.exe	31
PID 2716 wrote to memory of 2892	2716	grotesque.exe	31
PID 2716 wrote to memory of 2892	2716	grotesque.exe	31
PID 2716 wrote to memory of 2892	2716	grotesque.exe	31
PID 2716 wrote to memory of 2892	2716	grotesque.exe	31
PID 2716 wrote to memory of 2892	2716	grotesque.exe	31

C:\Users\Admin\AppData\Local\Temp\cb64f92875fbd6c7baa1532c3cfd4a9b3a2d12dd50afe5ace3699945d37129a6.exe
"C:\Users\Admin\AppData\Local\Temp\cb64f92875fbd6c7baa1532c3cfd4a9b3a2d12dd50afe5ace3699945d37129a6.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2684
- 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:2716
- - 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:2892

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
62ec445e2cade288fa07fe0c6fae1e94

SHA1
d784e62de693f21c007b7fbd70ee4d174e00fa3d

SHA256
46d2d37d63e346fd0f66fecc87b7ac37e3dc4ee8c77e56bab2eee25dc73734d3

SHA512
a17651eafd3262300382d7a6f09644fe52559f22e4d233db197a12efe837fc7bc5424160346e6825b00dfc0b6cb4b842efaadf548b66ca040450d702e5f693e6

Download Submit
memory/2684-1-0x0000000074B20000-0x00000000750CB000-memory.dmp

Filesize
5.7MB

Download
memory/2684-2-0x0000000074B20000-0x00000000750CB000-memory.dmp

Filesize
5.7MB

Download
memory/2684-14-0x0000000074B20000-0x00000000750CB000-memory.dmp

Filesize
5.7MB

Download
memory/2684-0-0x0000000074B21000-0x0000000074B22000-memory.dmp

Filesize
4KB

Download
memory/2716-24-0x0000000074B20000-0x00000000750CB000-memory.dmp

Filesize
5.7MB

Download
memory/2716-17-0x0000000074B20000-0x00000000750CB000-memory.dmp

Filesize
5.7MB

Download
memory/2716-16-0x0000000074B20000-0x00000000750CB000-memory.dmp

Filesize
5.7MB

Download
memory/2716-15-0x0000000074B20000-0x00000000750CB000-memory.dmp

Filesize
5.7MB

Download
memory/2892-20-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/2892-18-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/2892-21-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/2892-22-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/2892-23-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/2892-19-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/2892-25-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads