540fd74258f274c057bb438f6bdb6b9373e234ed2e6aa2632f357f5b1f614b9e

Analysis

max time kernel
121s
max time network
121s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
27-01-2025 22:29

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General

Target

540fd74258f274c057bb438f6bdb6b9373e234ed2e6aa2632f357f5b1f614b9e.dll
Size

137KB
MD5

399a611c5bad73f94427f4ae0c6ea524
SHA1

33967c83797d264354ff50d748a48cb437c1b518
SHA256

540fd74258f274c057bb438f6bdb6b9373e234ed2e6aa2632f357f5b1f614b9e
SHA512

4b20f23373f6e825f74ca01ef01dfeb1f432ad87ec38bb5c69ca576177d8bf2853e1f7475e6a7940e8e3f75782d37745990c9911bf42e75ad2e8a9154df15a7d
SSDEEP

3072:6R02WMK8RJGInTlhnaBanONVk40rpg4yeF/TyUGSK9FrafcUksPxx6iTUuV:v25GgFny61mraz

Score

5^/10

discovery

Malware Config

Signatures

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\com\comb.dll	rundll32.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\AppPatch\ComBack.Dll	rundll32.exe
File opened for modification	C:\Windows\AppPatch\ComBack.Dll	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2624	1616	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 1720 wrote to memory of 1616	1720	rundll32.exe	30
PID 1720 wrote to memory of 1616	1720	rundll32.exe	30
PID 1720 wrote to memory of 1616	1720	rundll32.exe	30
PID 1720 wrote to memory of 1616	1720	rundll32.exe	30
PID 1720 wrote to memory of 1616	1720	rundll32.exe	30
PID 1720 wrote to memory of 1616	1720	rundll32.exe	30
PID 1720 wrote to memory of 1616	1720	rundll32.exe	30
PID 1616 wrote to memory of 2624	1616	rundll32.exe	31
PID 1616 wrote to memory of 2624	1616	rundll32.exe	31
PID 1616 wrote to memory of 2624	1616	rundll32.exe	31
PID 1616 wrote to memory of 2624	1616	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\540fd74258f274c057bb438f6bdb6b9373e234ed2e6aa2632f357f5b1f614b9e.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1720
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\540fd74258f274c057bb438f6bdb6b9373e234ed2e6aa2632f357f5b1f614b9e.dll,#1
  2⤵
  - Drops file in System32 directory
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1616
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1616 -s 228
    3⤵
    - Program crash
    PID:2624

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

memory/1616-3-0x0000000043E50000-0x0000000043E77000-memory.dmp

Filesize
156KB

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