zloader | 38bc13ef112b2f17d4d1a80243fac6a521b5d58228984aae0752d79487fa3b66

Analysis

max time kernel
102s
max time network
115s
platform
windows10-2004_x64
resource
win10v2004-20250610-en
resource tags

arch:x64arch:x86image:win10v2004-20250610-enlocale:en-usos:windows10-2004-x64system
submitted
17/06/2025, 23:14

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General

Target
95560f1a465e8ba87a73f8e60a6657545073d55c3b5cfc2ffdaf3d69d46afcf9.dll
Size 260KB
Sample250617-28f92aspx3
SHA256 95560f1a465e8ba87a73f8e60a6657545073d55c3b5cfc2ffdaf3d69d46afcf9
MD5 9e9719483cc24dc0ab94b31f76981f42
SHA1 dad2cbcedfa94a2d2f0fde521d6f57a094d7c85b
SHA512 83cff2d55df7d40aea1357515cc673792b367718e57624a2eedd531fd51c49ff165e5e69065efa09148d550644ea1106f54dea35aaadcebaa9ed911532c44309
SSDEEP 6144:HP2sOvpPfQUH6+SqpcH1lH0CIuK8AWaULcka:HPXOv9RH6fEcH1h0vuLNyk
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

zloader botnet discovery trojan

Malware Config

Signatures

Zloader family
zloader
Zloader, Terdot, DELoader, ZeusSphinx
Zloader is a malware strain that was initially discovered back in August 2015.
trojan botnet zloader

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1940 set thread context of 4824	1940	regsvr32.exe	91

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4768	4824	WerFault.exe	91

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	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 5196 wrote to memory of 1940	5196	regsvr32.exe	87
PID 5196 wrote to memory of 1940	5196	regsvr32.exe	87
PID 5196 wrote to memory of 1940	5196	regsvr32.exe	87
PID 1940 wrote to memory of 4824	1940	regsvr32.exe	91
PID 1940 wrote to memory of 4824	1940	regsvr32.exe	91
PID 1940 wrote to memory of 4824	1940	regsvr32.exe	91
PID 1940 wrote to memory of 4824	1940	regsvr32.exe	91
PID 1940 wrote to memory of 4824	1940	regsvr32.exe	91

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\95560f1a465e8ba87a73f8e60a6657545073d55c3b5cfc2ffdaf3d69d46afcf9.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:5196
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\95560f1a465e8ba87a73f8e60a6657545073d55c3b5cfc2ffdaf3d69d46afcf9.dll
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1940
- - C:\Windows\SysWOW64\msiexec.exe
    msiexec.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4824
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4824 -s 576
      4⤵
      Program crash
      PID:4768

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4824 -ip 4824
1⤵
PID:4920

Network

MITRE ATT&CK Enterprise v16

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/4824-0-0x0000000001260000-0x000000000128E000-memory.dmp

Download

memory/4824-1-0x0000000001260000-0x000000000128E000-memory.dmp