84e867c1cb20e12e3bda10755a456757f5d67f0d564ece60687dd0236e079ac2

Analysis

max time kernel
101s
max time network
103s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
18/08/2024, 10:44

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General

Target
b1664af46c2821cd50ce37492cf08e90N.dll
Size 76KB
Sample240818-mstsvszdrf
SHA256 84e867c1cb20e12e3bda10755a456757f5d67f0d564ece60687dd0236e079ac2
MD5 b1664af46c2821cd50ce37492cf08e90
SHA1 e7d8e6239e71497cb2e666eb91cdd8ef88782508
SHA512 56d39f5ead43e2b93ba6d59c4d36fac2a1c8b7d789f6f1cf3b93ac429f394e00840addd3a519e8df1d46aad83046f7ecb334422b4068179db8740007b6caf5d3
SSDEEP 1536:YjV8y93KQpFQmPLRk7G50zy/riF12jvRyo0hQk7Z4nRz:c8y93KQjy7G55riF1cMo03yRz
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

discovery persistence privilege_escalation upx

Malware Config

Signatures

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4636-0-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4636-2-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1472	4636	WerFault.exe	84

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 AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4636	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3100 wrote to memory of 4636	3100	rundll32.exe	84
PID 3100 wrote to memory of 4636	3100	rundll32.exe	84
PID 3100 wrote to memory of 4636	3100	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b1664af46c2821cd50ce37492cf08e90N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3100
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\b1664af46c2821cd50ce37492cf08e90N.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4636
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4636 -s 716
    3⤵
    - Program crash
    PID:1472

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4636 -ip 4636
1⤵
PID:4800

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Privilege Escalation

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

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/4636-0-0x0000000010000000-0x0000000010030000-memory.dmp

Download

memory/4636-2-0x0000000010000000-0x0000000010030000-memory.dmp