zloader | baf5a4d8895b91205e8e83f4899546031020b8be5ef1adb543a5289a8baa6568

General

Target

baf5a4d8895b91205e8e83f4899546031020b8be5ef1adb543a5289a8baa6568.dll
Size

375KB
MD5

07138aec070b27a80e7ae1fe273c05a2
SHA1

e119d237fe730112fef7c8d8ee36d06e083d150c
SHA256

baf5a4d8895b91205e8e83f4899546031020b8be5ef1adb543a5289a8baa6568
SHA512

f73f1c14e2ae1a10ac2c7d4f5ce8f19c5cf8590f50754e0685591e99aa732f8e92b6d22ecc68bb615e4259bfa66afda0f02762e7b8b0b8d8a678f948922cb20a

Score

10^/10

zloader caspam caspam botnet persistence trojan

Malware Config

Extracted

Family

zloader

Botnet

CASPAM

Campaign

CASPAM

C2

http://marchadvertisingnetwork4.com/post.php

http://marchadvertisingnetwork5.com/post.php

http://marchadvertisingnetwork6.com/post.php

http://marchadvertisingnetwork7.com/post.php

http://marchadvertisingnetwork8.com/post.php

http://marchadvertisingnetwork9.com/post.php

http://marchadvertisingnetwork10.com/post.php

Attributes

build_id
24

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 1 IoCs

Processes:

msiexec.exe

flow pid process

9 1844 msiexec.exe

flow	pid	process
9	1844	msiexec.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

msiexec.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows\CurrentVersion\Run	msiexec.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows\CurrentVersion\Run\Gyza = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\Wyiz\\wiedese.dll,DllRegisterServer"	msiexec.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

rundll32.exe

description pid process target process

PID 1648 set thread context of 1844 1648 rundll32.exe msiexec.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

msiexec.exe

description pid process

Token: SeSecurityPrivilege 1844 msiexec.exe
Token: SeSecurityPrivilege 1844 msiexec.exe

description	pid	process	target process
PID 1648 set thread context of 1844	1648	rundll32.exe	msiexec.exe

description	pid	process
Token: SeSecurityPrivilege	1844	msiexec.exe
Token: SeSecurityPrivilege	1844	msiexec.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1548 wrote to memory of 1648	1548	rundll32.exe	rundll32.exe
PID 1548 wrote to memory of 1648	1548	rundll32.exe	rundll32.exe
PID 1548 wrote to memory of 1648	1548	rundll32.exe	rundll32.exe
PID 1548 wrote to memory of 1648	1548	rundll32.exe	rundll32.exe
PID 1548 wrote to memory of 1648	1548	rundll32.exe	rundll32.exe
PID 1548 wrote to memory of 1648	1548	rundll32.exe	rundll32.exe
PID 1548 wrote to memory of 1648	1548	rundll32.exe	rundll32.exe
PID 1648 wrote to memory of 1844	1648	rundll32.exe	msiexec.exe
PID 1648 wrote to memory of 1844	1648	rundll32.exe	msiexec.exe
PID 1648 wrote to memory of 1844	1648	rundll32.exe	msiexec.exe
PID 1648 wrote to memory of 1844	1648	rundll32.exe	msiexec.exe
PID 1648 wrote to memory of 1844	1648	rundll32.exe	msiexec.exe
PID 1648 wrote to memory of 1844	1648	rundll32.exe	msiexec.exe
PID 1648 wrote to memory of 1844	1648	rundll32.exe	msiexec.exe
PID 1648 wrote to memory of 1844	1648	rundll32.exe	msiexec.exe
PID 1648 wrote to memory of 1844	1648	rundll32.exe	msiexec.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\baf5a4d8895b91205e8e83f4899546031020b8be5ef1adb543a5289a8baa6568.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1548

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\baf5a4d8895b91205e8e83f4899546031020b8be5ef1adb543a5289a8baa6568.dll,#1
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1648

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
3⤵
- Blocklisted process makes network request
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
PID:1844

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1648-54-0x0000000076451000-0x0000000076453000-memory.dmp

Filesize
8KB

Download
memory/1648-56-0x00000000751C0000-0x000000007523D000-memory.dmp

Filesize
500KB

Download
memory/1648-55-0x00000000751C0000-0x00000000751F0000-memory.dmp

Filesize
192KB

Download
memory/1648-57-0x0000000000170000-0x0000000000171000-memory.dmp

Filesize
4KB

Download
memory/1844-58-0x0000000000110000-0x0000000000140000-memory.dmp

Filesize
192KB

Download
memory/1844-59-0x0000000000110000-0x0000000000141000-memory.dmp

Filesize
196KB

Download
memory/1844-60-0x0000000000110000-0x0000000000141000-memory.dmp

Filesize
196KB

Download
memory/1844-62-0x0000000000110000-0x0000000000140000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing