zloader | e7a8396f875706bb367572480a2fe01be5a70163659fa9478e72779d553bae99

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25-12-2023 23:04

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General

Target

4204cc08265199def9a90a8401139adf.dll
Size

316KB
MD5

4204cc08265199def9a90a8401139adf
SHA1

ba1a47f6131106145030c09620388d4f9e188de8
SHA256

e7a8396f875706bb367572480a2fe01be5a70163659fa9478e72779d553bae99
SHA512

4f354b4b021ba9ea364b61c55df59bfdef4bdf7e1072b29572478eab3f7ad0fc3ab6d24f4ea498da2fe6db9d362ce3632057a328caba66eded55f828d0297dcc
SSDEEP

6144:VO7Ec2ccPvATdPsM2JSzwMxZS6VWxtoloBj5rbx:Q7vLGoZPs6NxZnVJ6Bj5rbx

Score

10^/10

zloader botnet persistence trojan

Malware Config

Extracted

Family

zloader

Attributes

build_id
808400176

Signatures

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

msiexec.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Udohegi = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\Dyod\\ecidcegy.dll,DllRegisterServer"	msiexec.exe

Blocklisted process makes network request 5 IoCs

Processes:

msiexec.exe

flow pid process

123 916 msiexec.exe
125 916 msiexec.exe
126 916 msiexec.exe
129 916 msiexec.exe
131 916 msiexec.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

rundll32.exe

description pid process target process

PID 2248 set thread context of 916 2248 rundll32.exe msiexec.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1816 2248 WerFault.exe rundll32.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

msiexec.exe

description pid process

Token: SeSecurityPrivilege 916 msiexec.exe
Token: SeSecurityPrivilege 916 msiexec.exe

flow	pid	process
123	916	msiexec.exe
125	916	msiexec.exe
126	916	msiexec.exe
129	916	msiexec.exe
131	916	msiexec.exe

description	pid	process	target process
PID 2248 set thread context of 916	2248	rundll32.exe	msiexec.exe

pid	pid_target	process	target process
1816	2248	WerFault.exe	rundll32.exe

description	pid	process
Token: SeSecurityPrivilege	916	msiexec.exe
Token: SeSecurityPrivilege	916	msiexec.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 220 wrote to memory of 2248	220	rundll32.exe	rundll32.exe
PID 220 wrote to memory of 2248	220	rundll32.exe	rundll32.exe
PID 220 wrote to memory of 2248	220	rundll32.exe	rundll32.exe
PID 2248 wrote to memory of 916	2248	rundll32.exe	msiexec.exe
PID 2248 wrote to memory of 916	2248	rundll32.exe	msiexec.exe
PID 2248 wrote to memory of 916	2248	rundll32.exe	msiexec.exe
PID 2248 wrote to memory of 916	2248	rundll32.exe	msiexec.exe
PID 2248 wrote to memory of 916	2248	rundll32.exe	msiexec.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4204cc08265199def9a90a8401139adf.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:220

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4204cc08265199def9a90a8401139adf.dll,#1
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2248

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
3⤵
- Adds Run key to start application
- Blocklisted process makes network request
- Suspicious use of AdjustPrivilegeToken
PID:916

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2248 -s 600
3⤵
- Program crash
PID:1816

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2248 -ip 2248
1⤵
PID:2448

Network

MITRE ATT&CK Enterprise v15

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/916-8-0x0000000000800000-0x0000000000826000-memory.dmp

Filesize
152KB

Download
memory/916-11-0x0000000000800000-0x0000000000826000-memory.dmp

Filesize
152KB

Download
memory/916-12-0x0000000000800000-0x0000000000826000-memory.dmp

Filesize
152KB

Download
memory/2248-0-0x0000000001620000-0x0000000001642000-memory.dmp

Filesize
136KB

Download
memory/2248-1-0x0000000010000000-0x0000000010052000-memory.dmp

Filesize
328KB

Download
memory/2248-2-0x0000000010000000-0x0000000010052000-memory.dmp

Filesize
328KB

Download
memory/2248-3-0x0000000010000000-0x0000000010052000-memory.dmp

Filesize
328KB

Download
memory/2248-4-0x0000000010000000-0x0000000010052000-memory.dmp

Filesize
328KB

Download
memory/2248-5-0x0000000010000000-0x0000000010052000-memory.dmp

Filesize
328KB

Download
memory/2248-6-0x0000000010000000-0x0000000010052000-memory.dmp

Filesize
328KB

Download
memory/2248-7-0x0000000010000000-0x0000000010052000-memory.dmp

Filesize
328KB

Download
memory/2248-9-0x0000000010000000-0x0000000010052000-memory.dmp

Filesize
328KB

Download