276da67100830bf7791e788022716f1a730118b3b6b8956dc732893653f0a83c

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20-01-2025 22:22

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General

Target

276da67100830bf7791e788022716f1a730118b3b6b8956dc732893653f0a83c.dll
Size

144KB
MD5

57cb789b0c748b0a4f930a0e353a23e4
SHA1

3dfe3d6a8cbe1362063b6df7dd247ec9e0f1f842
SHA256

276da67100830bf7791e788022716f1a730118b3b6b8956dc732893653f0a83c
SHA512

542c7e05b30935c4c23f7f25e62bd8d3ea8c55ed208be55e8b72a1d9e9eba72fb76ad7eeb5f4e2e4baac0f965e08a223e1cbda95b45625297f18b1ef8a7ed4b9
SSDEEP

3072:sdSdb6JJWj6QGFOTRM5Yry8cOHz4zUkpgzag:sdSJ6nWGvFOdM5YT4zUkpsag

Score

7^/10

discovery upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4220	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/0x0009000000023c8e-3.dat	upx
behavioral2/memory/4220-5-0x0000000000400000-0x000000000045D000-memory.dmp	upx
behavioral2/memory/4220-8-0x0000000000400000-0x000000000045D000-memory.dmp	upx

Program crash 2 IoCs

pid	pid_target	Process	procid_target
5068	3020	WerFault.exe	83
3668	4220	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	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 4004 wrote to memory of 3020	4004	rundll32.exe	83
PID 4004 wrote to memory of 3020	4004	rundll32.exe	83
PID 4004 wrote to memory of 3020	4004	rundll32.exe	83
PID 3020 wrote to memory of 4220	3020	rundll32.exe	84
PID 3020 wrote to memory of 4220	3020	rundll32.exe	84
PID 3020 wrote to memory of 4220	3020	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\276da67100830bf7791e788022716f1a730118b3b6b8956dc732893653f0a83c.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4004
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\276da67100830bf7791e788022716f1a730118b3b6b8956dc732893653f0a83c.dll,#1
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3020
- - C:\Windows\SysWOW64\rundll32mgr.exe
    C:\Windows\SysWOW64\rundll32mgr.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4220
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4220 -s 264
      4⤵
      Program crash
      PID:3668
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3020 -s 608
    3⤵
    - Program crash
    PID:5068

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4220 -ip 4220
1⤵
PID:3744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3020 -ip 3020
1⤵
PID:1280

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
106KB

MD5
7550804dcb2dd83c3383835d26d750fd

SHA1
fc22ba558f6251ced1b9ba0117d23b8cfdcc8f2f

SHA256
22365d7b52523ed42509ed9d80eb32a1094ffe39946e6016ff678713053412f5

SHA512
01cd7e614c25c9213ad439d4996780d510107ab9ddb904f78d19b2c583d22901fb29cae5459a8203214b968736403d9f5ff6adf94019186008f4b9806a28e884

Download Submit
memory/3020-0-0x000000006D180000-0x000000006D1A4000-memory.dmp

Filesize
144KB

Download
memory/3020-9-0x000000006D180000-0x000000006D1A4000-memory.dmp

Filesize
144KB

Download
memory/4220-5-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/4220-6-0x0000000000570000-0x0000000000571000-memory.dmp

Filesize
4KB

Download
memory/4220-8-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download