c69456fed0c554dd1086d060dd4d9ba78f6f1c277fdc33a6dd45708d1ca1b2e3

Analysis

max time kernel
15s
max time network
122s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
30-12-2023 06:34

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General

Target

112ff066b5319b525b2a4d90a636a513.exe
Size

13KB
MD5

112ff066b5319b525b2a4d90a636a513
SHA1

9a4fa11c8cd6644209303a6712f01c802a8fcdca
SHA256

c69456fed0c554dd1086d060dd4d9ba78f6f1c277fdc33a6dd45708d1ca1b2e3
SHA512

a440cdfaaf6668dcb0d435b7ac6e940ad317866115d1274972677cefb61ec357d477748d4385edc31fe7ec745f11c8879906160f29008fa14bc9c0d590a641cb
SSDEEP

192:j4Rew/Pw5+7Gb8IdKR6UdbHdACY+P8nbzZ1MPC+/os0aGFYigLMPGRzz7o/Os6G:E9gRbZYMAHtEbjnWzL1zz72F

Score

8^/10

persistence upx

Malware Config

Signatures

Modifies AppInit DLL entries 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1547.001

Modify Registry
T1112

Executes dropped EXE 1 IoCs

pid	Process
4008	welyczk.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4780-0-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral2/files/0x000200000001fafe-5.dat	upx
behavioral2/memory/4008-7-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral2/memory/4780-6-0x0000000000400000-0x000000000040F000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\welycz.dll	112ff066b5319b525b2a4d90a636a513.exe
File created	C:\Windows\SysWOW64\welyczk.exe	112ff066b5319b525b2a4d90a636a513.exe
File opened for modification	C:\Windows\SysWOW64\welyczk.exe	112ff066b5319b525b2a4d90a636a513.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4780 wrote to memory of 4008	4780	112ff066b5319b525b2a4d90a636a513.exe	19
PID 4780 wrote to memory of 4008	4780	112ff066b5319b525b2a4d90a636a513.exe	19
PID 4780 wrote to memory of 4008	4780	112ff066b5319b525b2a4d90a636a513.exe	19

C:\Users\Admin\AppData\Local\Temp\112ff066b5319b525b2a4d90a636a513.exe
"C:\Users\Admin\AppData\Local\Temp\112ff066b5319b525b2a4d90a636a513.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:4780
- C:\Windows\SysWOW64\welyczk.exe
  C:\Windows\system32\welyczk.exe ˜‰
  2⤵
  - Executes dropped EXE
  PID:4008
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\112ff066b5319b525b2a4d90a636a513.exe.bat
  2⤵
  PID:4444

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\112ff066b5319b525b2a4d90a636a513.exe.bat

Filesize
182B

MD5
7338709651bfcf1e1838748ffe515be3

SHA1
ab45b4f8f17c797c348b0309c3090317b1590328

SHA256
f77277a71c228789f6832148baec6dd1aa1a9919f298027fce4b601a911d327c

SHA512
bcb3b3bb89df6dbe20ef079a5644fad03db92c1974b74d1e83e7259a09484062a7ebb57e98ffbc1098c3adf9fa3e36a1d00fee3d272697013a45efc361e5816a

Download Submit
C:\Windows\SysWOW64\welyczk.exe

Filesize
13KB

MD5
112ff066b5319b525b2a4d90a636a513

SHA1
9a4fa11c8cd6644209303a6712f01c802a8fcdca

SHA256
c69456fed0c554dd1086d060dd4d9ba78f6f1c277fdc33a6dd45708d1ca1b2e3

SHA512
a440cdfaaf6668dcb0d435b7ac6e940ad317866115d1274972677cefb61ec357d477748d4385edc31fe7ec745f11c8879906160f29008fa14bc9c0d590a641cb

Download Submit
memory/4008-7-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/4780-0-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/4780-6-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download