4bcbb8983fe7425976c5a1789deff73fb138e80981f5ebfef1f835bcc6757760

Resubmissions

14/04/2025, 07:51

250414-jp1kfssjz9 10

14/04/2025, 07:46

250414-jl9nyssjt9 10

08/04/2025, 15:58

250408-tevasswl18 10

08/04/2025, 14:19

250408-rm2nqsvqw2 10

Analysis

max time kernel
148s
max time network
147s
platform
windows11-21h2_x64
resource
win11-20250411-en
resource tags

arch:x64arch:x86image:win11-20250411-enlocale:en-usos:windows11-21h2-x64system
submitted
14/04/2025, 07:46

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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 2 IoCs

pid	Process
652	grotesque.exe
4576	grotesque.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-1-5-21-2316063146-1984817004-4437738-1000\Software\Microsoft\Windows\CurrentVersion\Run\kokobaka = "C:\\Users\\Admin\\AppData\\Roaming\\future\\grotesque.exe"	f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2316063146-1984817004-4437738-1000\Software\Microsoft\Windows\CurrentVersion\Run\AudioClient	vbc.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 652 set thread context of 5144	652	grotesque.exe	82
PID 4576 set thread context of 3684	4576	grotesque.exe	85

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	grotesque.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5144	vbc.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2820 wrote to memory of 652	2820	cmd.exe	80
PID 2820 wrote to memory of 652	2820	cmd.exe	80
PID 2820 wrote to memory of 652	2820	cmd.exe	80
PID 2940 wrote to memory of 4576	2940	f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe	81
PID 2940 wrote to memory of 4576	2940	f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe	81
PID 2940 wrote to memory of 4576	2940	f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe	81
PID 652 wrote to memory of 5144	652	grotesque.exe	82
PID 652 wrote to memory of 5144	652	grotesque.exe	82
PID 652 wrote to memory of 5144	652	grotesque.exe	82
PID 652 wrote to memory of 5144	652	grotesque.exe	82
PID 652 wrote to memory of 5144	652	grotesque.exe	82
PID 652 wrote to memory of 5144	652	grotesque.exe	82
PID 652 wrote to memory of 5144	652	grotesque.exe	82
PID 652 wrote to memory of 5144	652	grotesque.exe	82
PID 652 wrote to memory of 5144	652	grotesque.exe	82
PID 4576 wrote to memory of 3684	4576	grotesque.exe	85
PID 4576 wrote to memory of 3684	4576	grotesque.exe	85
PID 4576 wrote to memory of 3684	4576	grotesque.exe	85
PID 4576 wrote to memory of 3684	4576	grotesque.exe	85
PID 4576 wrote to memory of 3684	4576	grotesque.exe	85
PID 4576 wrote to memory of 3684	4576	grotesque.exe	85
PID 4576 wrote to memory of 3684	4576	grotesque.exe	85
PID 4576 wrote to memory of 3684	4576	grotesque.exe	85
PID 4576 wrote to memory of 3684	4576	grotesque.exe	85

C:\Users\Admin\AppData\Local\Temp\f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe
"C:\Users\Admin\AppData\Local\Temp\f640f01e808f31a32d455a827fd646d5faf2a452b47833597990ffe9a6597ac5.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2940
- 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:4576
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    3⤵
    PID:3684

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Roaming\future\grotesque.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:2820
- 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:652
- - 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
    - Suspicious use of SetWindowsHookEx
    PID:5144

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c 邐邐邐邐
1⤵
PID:2804

Network

MITRE ATT&CK Enterprise v16

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

C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\grotesque.exe.log

Filesize
400B

MD5
120bfac9d59228edf92ec26d4bbfaf9e

SHA1
bc36d828b7f358671ef0cb934c4ab2fdfb02b447

SHA256
c4c6e7ef90b460bf232e55933594a95ba4a2d156fa5accb06d1c7c2f817fcf35

SHA512
684f086ff7d41d85782b21f5bc7e79584f5866f3c06eabbca2c5a697c1d142aa81e0dc25c78be978ba67e9e6fc014f3b62d1da114dc1bb009c7637491a619137

Download Submit
C:\Users\Admin\AppData\Roaming\future\grotesque.exe

Filesize
374KB

MD5
d7a835d6f02b2472a6b4d4630cbe9ca6

SHA1
3b21c2d9e21d5ed85092385b33e5f580ae3577ab

SHA256
2f21c76e3284a8fcee1b5fbce5e75b0f63b28cd6f03a255c2b350542478e36d0

SHA512
bfd4f9f2ff01f3235e89e88ecbc0f37ae0a3bf3aaf88acbc78da9e877c5b220972191c7e7653892dcafe7dcced569aded5a5d91ef98be2bf99031e96ee317b19

Download Submit
memory/652-24-0x0000000075040000-0x00000000755F1000-memory.dmp

Filesize
5.7MB

Download
memory/652-9-0x0000000075040000-0x00000000755F1000-memory.dmp

Filesize
5.7MB

Download
memory/652-8-0x0000000075040000-0x00000000755F1000-memory.dmp

Filesize
5.7MB

Download
memory/652-10-0x0000000075040000-0x00000000755F1000-memory.dmp

Filesize
5.7MB

Download
memory/2940-1-0x0000000075040000-0x00000000755F1000-memory.dmp

Filesize
5.7MB

Download
memory/2940-2-0x0000000075040000-0x00000000755F1000-memory.dmp

Filesize
5.7MB

Download
memory/2940-13-0x0000000075040000-0x00000000755F1000-memory.dmp

Filesize
5.7MB

Download
memory/2940-14-0x0000000075040000-0x00000000755F1000-memory.dmp

Filesize
5.7MB

Download
memory/2940-0-0x0000000075041000-0x0000000075042000-memory.dmp

Filesize
4KB

Download
memory/3684-28-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/3684-30-0x0000000000470000-0x0000000000481000-memory.dmp

Filesize
68KB

Download
memory/3684-31-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/3684-29-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/4576-16-0x0000000075040000-0x00000000755F1000-memory.dmp

Filesize
5.7MB

Download
memory/4576-17-0x0000000075040000-0x00000000755F1000-memory.dmp

Filesize
5.7MB

Download
memory/4576-15-0x0000000075040000-0x00000000755F1000-memory.dmp

Filesize
5.7MB

Download
memory/4576-33-0x0000000075040000-0x00000000755F1000-memory.dmp

Filesize
5.7MB

Download
memory/5144-18-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/5144-21-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/5144-23-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/5144-22-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/5144-34-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads