537a88d2c2c8cee418e6b1da94d655caa0ece2beb6c04fe1f96aeb199d87eded

Analysis

max time kernel
63s
max time network
17s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
31/12/2024, 12:11

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General

Target

msvcr71.dll
Size

340KB
MD5

5d70d744b237a3a1f57c475600764c3e
SHA1

87bad3d29394b08459d164a6047657a3f9498f60
SHA256

525b896a6de9d1c400a61d09cbd1248376f64559da5ef22380600efefdd06078
SHA512

730e876de54596e5ef9e7e14a5eb74efd1661659ebb06c0be8ff7055d62103d5fedd11c07ccf1a2b958c46542cff580ce3a22d4d313cb8ed8b82e6ba6db3571a
SSDEEP

6144:PcV9z83OtqxnEYmt3NEnvfF+Tbmbw6An8FMciFMNrb3YgxxpbCAOxO2ElvlE:Poz83OtIEzW+/m/AyF7bCrO/E

Score

3^/10

discovery

Malware Config

Signatures

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3024	1172	WerFault.exe	30

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 11 IoCs

description	pid	Process	procid_target
PID 528 wrote to memory of 1172	528	rundll32.exe	30
PID 528 wrote to memory of 1172	528	rundll32.exe	30
PID 528 wrote to memory of 1172	528	rundll32.exe	30
PID 528 wrote to memory of 1172	528	rundll32.exe	30
PID 528 wrote to memory of 1172	528	rundll32.exe	30
PID 528 wrote to memory of 1172	528	rundll32.exe	30
PID 528 wrote to memory of 1172	528	rundll32.exe	30
PID 1172 wrote to memory of 3024	1172	rundll32.exe	31
PID 1172 wrote to memory of 3024	1172	rundll32.exe	31
PID 1172 wrote to memory of 3024	1172	rundll32.exe	31
PID 1172 wrote to memory of 3024	1172	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\msvcr71.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:528
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\msvcr71.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1172
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1172 -s 224
    3⤵
    - Program crash
    PID:3024

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

Windows 7 deprecation

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