639221ee46673a58d845ed93fad26cc2f689ae8ebe833fed4ea901b00d367575

Analysis

max time kernel
94s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05/10/2024, 12:36

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General

Target
639221ee46673a58d845ed93fad26cc2f689ae8ebe833fed4ea901b00d367575N.dll
Size 148KB
Sample241005-psxwmatank
SHA256 639221ee46673a58d845ed93fad26cc2f689ae8ebe833fed4ea901b00d367575
MD5 5a57e8e4272c83281ad7861a84fbfce0
SHA1 422e3cb42b0069965ee7e93e4b1a46f5afcdd2aa
SHA512 4f51a951f510a9b2640e4cdd0fe9911a39ce5e3944db02231a6d1e3b82161293a698f94323e68d24eaa4acf9d02d2c44d1596e824e2e4a4f1975ebdd4378d8c1
SSDEEP 3072:cudz5JDDwv6mT7AEkiIcaXLBlbndy8Z6GRkaNgIG:NrSLHDIcwTngo6GI
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

discovery upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4728	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/0x00090000000233d6-3.dat	upx
behavioral2/memory/4728-4-0x0000000000400000-0x0000000000463000-memory.dmp	upx
behavioral2/memory/4728-7-0x0000000000400000-0x0000000000463000-memory.dmp	upx

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1468	4728	WerFault.exe	83

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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32mgr.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 492 wrote to memory of 3096	492	rundll32.exe	82
PID 492 wrote to memory of 3096	492	rundll32.exe	82
PID 492 wrote to memory of 3096	492	rundll32.exe	82
PID 3096 wrote to memory of 4728	3096	rundll32.exe	83
PID 3096 wrote to memory of 4728	3096	rundll32.exe	83
PID 3096 wrote to memory of 4728	3096	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\639221ee46673a58d845ed93fad26cc2f689ae8ebe833fed4ea901b00d367575N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:492
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\639221ee46673a58d845ed93fad26cc2f689ae8ebe833fed4ea901b00d367575N.dll,#1
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3096
- - C:\Windows\SysWOW64\rundll32mgr.exe
    C:\Windows\SysWOW64\rundll32mgr.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4728
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4728 -s 264
      4⤵
      Program crash
      PID:1468

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4728 -ip 4728
1⤵
PID:3652

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

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Downloads

rundll32mgr.exe

Path C:\Windows\SysWOW64\rundll32mgr.exe
Size 105KB
SHA256 e50689964fa016ff34ad6517bb863e26e571f907635e719f1fe5e70a61763d95
MD5 98a8ced05b34189b8b36760049b2ea36
SHA1 a5271250fb91d891c7df0cae7812ed68907ae076
SHA512 8548b7dc08007fe55e2b7f9bf502c7271655edff52100bb8445a321f37137139c0cd54f7f85558a2f99b38dd574c8435371adc07f8c365bf8a8561c63fe6be45
SSDEEP 1536:SsOC0FvV4OguHxjhpA4Bm7uW0vSUsghQevBFkutIbgTuFqKRr0aF5frleGhd9Tf8:SswV4OgSzBmh04eZFkz3Rr0gwGj9Tf8
MD5 SHA1 SHA512 SSDEEP

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memory/3096-1-0x0000000075830000-0x0000000075859000-memory.dmp

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memory/4728-4-0x0000000000400000-0x0000000000463000-memory.dmp

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memory/4728-6-0x00000000004F0000-0x00000000004F1000-memory.dmp

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memory/4728-7-0x0000000000400000-0x0000000000463000-memory.dmp

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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