zloader | 66f49a261b6086dfdd1c3e2a21f7cb746aa35707490cbd64693d66383ba54c64

Analysis

max time kernel
510s
max time network
513s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
27-10-2022 06:35

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General

Target

66f49a261b6086dfdd1c3e2a21f7cb746aa35707490cbd64693d66383ba54c64.dll
Size

128KB
MD5

33d2581d7d36acde729ce52c5d106d79
SHA1

48b9cbe0f6922d6c844ab7b7122bc0cd389bf711
SHA256

66f49a261b6086dfdd1c3e2a21f7cb746aa35707490cbd64693d66383ba54c64
SHA512

75acc63cb9c38c0dd3d1759c93f38fc41e62b8853146267b6d80c7b979cf9bf281d3bd44519f1f6a9085d161a4a3d5abc5c71702c914382645e55af3fd6c8770
SSDEEP

3072:f9r5C53D8cD2blVIevrYc/vdDwfYX8D5/x6tT8Wfgpwylb:ft5C53D8ckM6sDW5g6yl

Score

10^/10

zloader 04/02 botnet persistence trojan

Malware Config

Extracted

Family

zloader

Botnet

04/02

https://brewaz.club/milagrecf.php

https://buhjike.host/milagrecf.php

Attributes

build_id
49

rc4.plain

Signatures

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

Blocklisted process makes network request 10 IoCs

flow	pid	Process
36	1424	msiexec.exe
37	1424	msiexec.exe
38	1424	msiexec.exe
39	1424	msiexec.exe
40	1424	msiexec.exe
47	1424	msiexec.exe
48	1424	msiexec.exe
49	1424	msiexec.exe
51	1424	msiexec.exe
52	1424	msiexec.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run	msiexec.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Efeg = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\Hydoco\\fobua.dll,DllRegisterServer"	msiexec.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4968 set thread context of 1424	4968	regsvr32.exe	89

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeSecurityPrivilege	1424	msiexec.exe
Token: SeSecurityPrivilege	1424	msiexec.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4744 wrote to memory of 4968	4744	regsvr32.exe	81
PID 4744 wrote to memory of 4968	4744	regsvr32.exe	81
PID 4744 wrote to memory of 4968	4744	regsvr32.exe	81
PID 4968 wrote to memory of 1424	4968	regsvr32.exe	89
PID 4968 wrote to memory of 1424	4968	regsvr32.exe	89
PID 4968 wrote to memory of 1424	4968	regsvr32.exe	89
PID 4968 wrote to memory of 1424	4968	regsvr32.exe	89
PID 4968 wrote to memory of 1424	4968	regsvr32.exe	89

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\66f49a261b6086dfdd1c3e2a21f7cb746aa35707490cbd64693d66383ba54c64.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:4744
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\66f49a261b6086dfdd1c3e2a21f7cb746aa35707490cbd64693d66383ba54c64.dll
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:4968
- - C:\Windows\SysWOW64\msiexec.exe
    msiexec.exe
    3⤵
    - Blocklisted process makes network request
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    PID:1424

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1424-134-0x0000000000700000-0x0000000000725000-memory.dmp

Filesize
148KB

Download
memory/1424-135-0x0000000000700000-0x0000000000725000-memory.dmp

Filesize
148KB

Download
memory/1424-136-0x0000000000700000-0x0000000000725000-memory.dmp

Filesize
148KB

Download