41dcfef8aa5c73b86e19d6a364a97f187026ee91ad2e5651fdd1bd02bc13d3da

Analysis

max time kernel
94s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16-12-2024 06:15

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General

Target

41dcfef8aa5c73b86e19d6a364a97f187026ee91ad2e5651fdd1bd02bc13d3daN.dll
Size

272KB
MD5

b8296554fab9c16346eb39fad1946170
SHA1

a31007dd5221b9a1573b28185c45db00d6ca6fdb
SHA256

41dcfef8aa5c73b86e19d6a364a97f187026ee91ad2e5651fdd1bd02bc13d3da
SHA512

61a210c5399d4bf0d6f55b8a5561bdd753811c1d6fbb615e49aff8c95ed3d2936c6bcdbf42d1fb3aeb7c37f7db518acebc32e25705c8402f6871a63c7348aaea
SSDEEP

3072:XAG3k/7fvPxnCi6IQCavh+tqZBosJ56GTuXHHetkqcqvnhzduT:QG3krP47IQd4tmZTuXHHel/VgT

Score

7^/10

discovery upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
208	rundll32mgr.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rundll32mgr.exe	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0009000000023b01-3.dat	upx
behavioral2/memory/208-5-0x0000000000400000-0x000000000045B000-memory.dmp	upx
behavioral2/memory/208-7-0x0000000000400000-0x000000000045B000-memory.dmp	upx

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4444	2584	WerFault.exe	83
4320	208	WerFault.exe	84

System Location Discovery: System Language Discovery 1 TTPs 2 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	rundll32mgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1200 wrote to memory of 2584	1200	rundll32.exe	83
PID 1200 wrote to memory of 2584	1200	rundll32.exe	83
PID 1200 wrote to memory of 2584	1200	rundll32.exe	83
PID 2584 wrote to memory of 208	2584	rundll32.exe	84
PID 2584 wrote to memory of 208	2584	rundll32.exe	84
PID 2584 wrote to memory of 208	2584	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\41dcfef8aa5c73b86e19d6a364a97f187026ee91ad2e5651fdd1bd02bc13d3daN.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1200
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\41dcfef8aa5c73b86e19d6a364a97f187026ee91ad2e5651fdd1bd02bc13d3daN.dll,#1
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2584
- - C:\Windows\SysWOW64\rundll32mgr.exe
    C:\Windows\SysWOW64\rundll32mgr.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:208
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 208 -s 264
      4⤵
      Program crash
      PID:4320
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2584 -s 620
    3⤵
    - Program crash
    PID:4444

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 2584 -ip 2584
1⤵
PID:4884

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 208 -ip 208
1⤵
PID:3888

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

C:\Windows\SysWOW64\rundll32mgr.exe

Filesize
105KB

MD5
dfb5daabb95dcfad1a5faf9ab1437076

SHA1
4a199569a9b52911bee7fb19ab80570cc5ff9ed1

SHA256
54282ec29d4993ed6e9972122cfbb70bba4898a21d527bd9e72a166d7ec2fdc0

SHA512
5d31c34403ab5f8db4a6d84f2b5579d4ea18673914b626d78e458a648ac20ddd8e342818e807331036d7bb064f596a02b9737acac42fbead29260343a30717e8

Download Submit
memory/208-6-0x0000000000570000-0x0000000000571000-memory.dmp

Filesize
4KB

Download
memory/208-5-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/208-7-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/2584-0-0x0000000010000000-0x0000000010045000-memory.dmp

Filesize
276KB

Download
memory/2584-8-0x0000000010000000-0x0000000010045000-memory.dmp

Filesize
276KB

Download