zloader | 8176f21fb83482ae1e7a723fdc352697795f07d03c30ff68410203127369c974

Analysis

max time kernel
149s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
22/05/2026, 18:06

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General

Target
tmp2jnxx4kq.exe
Size 1.0MB
Sample260522-wp4ckaex4z
SHA256 8176f21fb83482ae1e7a723fdc352697795f07d03c30ff68410203127369c974
MD5 ea1c4f1656731c8e075fcc06557e71d1
SHA1 81fc93fa20955013e7fcacdde22a9f204dc50459
SHA512 510f37a08724dbc701b1975cc497e503672d19fd4a73ad7668a5d83f001f13219cdc86d3f72bf8714f42ede6da753f5eea175455e732d382ae5ca4f565594d3a
SSDEEP 3072:szVNTuo0I5VCxmUd12i/8Y8rfulU8bax1i2NXu02LbjfrzyJKqAcwBuOo4Xl:sznu+5E3dUi278b4NX07fsALuo
TLSH
T18635D06E50BBDD71FD9034BDAB4240BBC417CDA95B6A5163B3A1DB14284D3CF98B830A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

botnet new new discovery zloader persistence trojan

Malware Config

Extracted

Family

zloader

Botnet

Campaign

https://sfturedfyr.xyz/int.php

Attributes

build_id
42

rc4.plain

rsa_pubkey.plain

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
5344	reyqynx.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-226940941-599731907-2645636698-1000\Software\Microsoft\Windows\CurrentVersion\Run\Usymqym = "C:\\Users\\Admin\\AppData\\Roaming\\Zyqel\\reyqynx.exe"	msiexec.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2612 set thread context of 2368	2612	tmp2jnxx4kq.exe	80
PID 5344 set thread context of 692	5344	reyqynx.exe	83

System Location Discovery: System Language Discovery 1 TTPs 4 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	reyqynx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmp2jnxx4kq.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeSecurityPrivilege	2368	msiexec.exe
Token: SeSecurityPrivilege	2368	msiexec.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2612 wrote to memory of 2368	2612	tmp2jnxx4kq.exe	80
PID 2612 wrote to memory of 2368	2612	tmp2jnxx4kq.exe	80
PID 5344 wrote to memory of 692	5344	reyqynx.exe	83
PID 5344 wrote to memory of 692	5344	reyqynx.exe	83

C:\Users\Admin\AppData\Local\Temp\tmp2jnxx4kq.exe
"C:\Users\Admin\AppData\Local\Temp\tmp2jnxx4kq.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2612
- C:\Windows\SysWOW64\msiexec.exe
  msiexec.exe
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2368

C:\Users\Admin\AppData\Roaming\Zyqel\reyqynx.exe
C:\Users\Admin\AppData\Roaming\Zyqel\reyqynx.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5344
- C:\Windows\SysWOW64\msiexec.exe
  msiexec.exe
  2⤵
  - System Location Discovery: System Language Discovery
  PID:692

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

reyqynx.exe

Path C:\Users\Admin\AppData\Roaming\Zyqel\reyqynx.exe
Size 1.0MB
SHA256 8176f21fb83482ae1e7a723fdc352697795f07d03c30ff68410203127369c974
MD5 ea1c4f1656731c8e075fcc06557e71d1
SHA1 81fc93fa20955013e7fcacdde22a9f204dc50459
SHA512 510f37a08724dbc701b1975cc497e503672d19fd4a73ad7668a5d83f001f13219cdc86d3f72bf8714f42ede6da753f5eea175455e732d382ae5ca4f565594d3a
SSDEEP 3072:szVNTuo0I5VCxmUd12i/8Y8rfulU8bax1i2NXu02LbjfrzyJKqAcwBuOo4Xl:sznu+5E3dUi278b4NX07fsALuo
TLSH
T18635D06E50BBDD71FD9034BDAB4240BBC417CDA95B6A5163B3A1DB14284D3CF98B830A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/692-14-0x00000000006A0000-0x00000000006CC000-memory.dmp

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memory/692-18-0x00000000006A0000-0x00000000006CC000-memory.dmp

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memory/692-17-0x00000000006A0000-0x00000000006CC000-memory.dmp

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memory/692-16-0x00000000006A0000-0x00000000006CC000-memory.dmp

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memory/2368-4-0x0000000000D70000-0x0000000000D9C000-memory.dmp

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memory/2368-7-0x0000000000D70000-0x0000000000D9C000-memory.dmp

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memory/2368-8-0x0000000000D70000-0x0000000000D9C000-memory.dmp

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memory/2612-5-0x0000000000400000-0x000000000050B000-memory.dmp

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memory/2612-0-0x0000000002210000-0x0000000002239000-memory.dmp

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memory/2612-1-0x0000000000400000-0x000000000050B000-memory.dmp

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memory/5344-15-0x0000000000400000-0x000000000050B000-memory.dmp

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memory/5344-11-0x0000000000400000-0x000000000050B000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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