21dc4187a7b5a5fda2a5f73101c27a4cd4dcc65566b1ff7327863f4e91211abd

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03/03/2025, 20:55

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General

Target

21dc4187a7b5a5fda2a5f73101c27a4cd4dcc65566b1ff7327863f4e91211abd.dll
Size

137KB
MD5

a5a34d6d4a69354254a7749b25b48c50
SHA1

a69e7b69b2815d7f72000274f00ddd36515142e5
SHA256

21dc4187a7b5a5fda2a5f73101c27a4cd4dcc65566b1ff7327863f4e91211abd
SHA512

3ea06284b10766143a301f6ea7936ed37f46e35c7b4c16fa48e2422aef5ab06d7c9b166e495bb7c636b57b708816ba5dfb5acc462ef5c94c21ea646411dec2bd
SSDEEP

3072:cR02WMK8RJGInTlhnaBanONVk40rpg4yeF/TyUGSK9FrafcUksPxx6iTUuQ:p25GgFny61mraW

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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2908	2904	WerFault.exe	31

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 2036 wrote to memory of 2904	2036	rundll32.exe	31
PID 2036 wrote to memory of 2904	2036	rundll32.exe	31
PID 2036 wrote to memory of 2904	2036	rundll32.exe	31
PID 2036 wrote to memory of 2904	2036	rundll32.exe	31
PID 2036 wrote to memory of 2904	2036	rundll32.exe	31
PID 2036 wrote to memory of 2904	2036	rundll32.exe	31
PID 2036 wrote to memory of 2904	2036	rundll32.exe	31
PID 2904 wrote to memory of 2908	2904	rundll32.exe	32
PID 2904 wrote to memory of 2908	2904	rundll32.exe	32
PID 2904 wrote to memory of 2908	2904	rundll32.exe	32
PID 2904 wrote to memory of 2908	2904	rundll32.exe	32

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\21dc4187a7b5a5fda2a5f73101c27a4cd4dcc65566b1ff7327863f4e91211abd.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2036
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\21dc4187a7b5a5fda2a5f73101c27a4cd4dcc65566b1ff7327863f4e91211abd.dll,#1
  2⤵
  - Drops file in System32 directory
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2904
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2904 -s 228
    3⤵
    - Program crash
    PID:2908

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/2904-3-0x0000000043E50000-0x0000000043E77000-memory.dmp

Filesize
156KB

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