399a66a264facc46f2a703c9de786fcff6707f1fa4ca383b9a35b3fdd073cb7e

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
01/10/2024, 12:13

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General

Target

bz2.dll
Size

34KB
MD5

2a7b1d2c98449faaf21a4bcaf4fbb4de
SHA1

4cb2cd2fd9311e4d3d6ec0484fc5a8c371a2c9f0
SHA256

cf1a55ad391361d401e2fad6183acd7b8a8c64c17738eedacf97e7c7279203bd
SHA512

6c40c8470d6b49975f84df13779551816ec510d5552cc235483ee5f306f72c61da0cf33ba3cc849a3b38386d770ae7fc5b292d5893fd01d8d6cb6b08d3d85265
SSDEEP

768:welRrZVnvj5+DAEy3Hu61ADZRtnntq0B9iHi/jwnbcuyD7UR:hVVb5kAEwO62xtz9+iMnouy8

Score

5^/10

discovery upx

Malware Config

Signatures

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral22/memory/3332-0-0x0000000010000000-0x0000000010019000-memory.dmp	upx
behavioral22/memory/3332-1-0x0000000074A30000-0x0000000074AE1000-memory.dmp	upx
behavioral22/memory/3332-2-0x000000001E000000-0x000000001E24E000-memory.dmp	upx
behavioral22/memory/3332-3-0x0000000010000000-0x0000000010019000-memory.dmp	upx
behavioral22/memory/3332-5-0x000000001E000000-0x000000001E24E000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 1 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	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4604 wrote to memory of 3332	4604	rundll32.exe	84
PID 4604 wrote to memory of 3332	4604	rundll32.exe	84
PID 4604 wrote to memory of 3332	4604	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bz2.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4604
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\bz2.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3332

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3332-0-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3332-1-0x0000000074A30000-0x0000000074AE1000-memory.dmp

Filesize
708KB

Download
memory/3332-2-0x000000001E000000-0x000000001E24E000-memory.dmp

Filesize
2.3MB

Download
memory/3332-4-0x0000000074A30000-0x0000000074AE1000-memory.dmp

Filesize
708KB

Download
memory/3332-3-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3332-5-0x000000001E000000-0x000000001E24E000-memory.dmp

Filesize
2.3MB

Download