bb3123329c8bb31c63d05d9f70841ebc83b7bb9ea7c200dc98f928482121d3e8

Analysis

max time kernel
92s
max time network
93s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-01-2025 09:15

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General

Target

bb3123329c8bb31c63d05d9f70841ebc83b7bb9ea7c200dc98f928482121d3e8N.dll
Size

272KB
MD5

7b51b95c561438dcb22d9be973ef8160
SHA1

b53dcb42c37225681f407ae675996d42f0fd7a87
SHA256

bb3123329c8bb31c63d05d9f70841ebc83b7bb9ea7c200dc98f928482121d3e8
SHA512

cedec3092b14964f68d7e49754167241c0564768a1807ce63a02182105d5452215aaf395fa5534ecbb12042da8806f8f5023e3688cf0c5e453e37d08f28d25b0
SSDEEP

6144:qTdB2d3g5lWbJmjU8NuPeLj+BFDMyksw/Q+e9:ydKzJm+CjYIsw1S

Score

7^/10

discovery upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2832	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/0x000c000000023b0e-3.dat	upx
behavioral2/memory/2832-4-0x0000000000400000-0x0000000000482000-memory.dmp	upx
behavioral2/memory/2832-9-0x0000000000400000-0x0000000000482000-memory.dmp	upx

Program crash 2 IoCs

pid	pid_target	Process	procid_target
216	2832	WerFault.exe	83
316	4468	WerFault.exe	82

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 2864 wrote to memory of 4468	2864	rundll32.exe	82
PID 2864 wrote to memory of 4468	2864	rundll32.exe	82
PID 2864 wrote to memory of 4468	2864	rundll32.exe	82
PID 4468 wrote to memory of 2832	4468	rundll32.exe	83
PID 4468 wrote to memory of 2832	4468	rundll32.exe	83
PID 4468 wrote to memory of 2832	4468	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bb3123329c8bb31c63d05d9f70841ebc83b7bb9ea7c200dc98f928482121d3e8N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2864
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\bb3123329c8bb31c63d05d9f70841ebc83b7bb9ea7c200dc98f928482121d3e8N.dll,#1
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4468
- - C:\Windows\SysWOW64\rundll32mgr.exe
    C:\Windows\SysWOW64\rundll32mgr.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2832
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2832 -s 524
      4⤵
      Program crash
      PID:216
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4468 -s 628
    3⤵
    - Program crash
    PID:316

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4468 -ip 4468
1⤵
PID:224

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 2832 -ip 2832
1⤵
PID:4780

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
215KB

MD5
4708ac54fd941df7678999c9e81472c0

SHA1
87a36accbe7b0223149548abf38d2ac76405b12b

SHA256
eda34e7b659d40e08ca97cea9c9d8c6d9f5c96556a1adc5d74e58c6b7ca2ea0d

SHA512
c7a7854b94e56b649118a3bfcfe0c08584ea141235f763fa5c3e2490f784b13a84b0361384064f371d0b2e71274bac30c44676e89ca6e77df033a0febc580308

Download Submit
memory/2832-4-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-6-0x00000000008E0000-0x00000000008E2000-memory.dmp

Filesize
8KB

Download
memory/2832-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4468-0-0x0000000013500000-0x0000000013545000-memory.dmp

Filesize
276KB

Download
memory/4468-7-0x0000000013500000-0x0000000013545000-memory.dmp

Filesize
276KB

Download