zloader | 3e43ec6538c8a8e0e3eee05ddfe1f304e9d42c9647c7df186c61c5e2d3c6218d

General

Target

Documents_2107120546.xls
Size

273KB
MD5

ab63a0153a6fe4e139ad83a6ffbab090
SHA1

1995e0863944a36b315a04b3ad7d073d50e16d05
SHA256

3e43ec6538c8a8e0e3eee05ddfe1f304e9d42c9647c7df186c61c5e2d3c6218d
SHA512

b2bd1ed261d87760265f82304f6feb4981d994217350325bb3e8715355f8acdeb782936861b18513544f8873ee344699670415d3e74798fa18ac256dad200a78

Score

10^/10

zloader kev 12/03 botnet trojan

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

https://sssolutionsllc.org/k.php

Extracted

Family

zloader

Botnet

kev

Campaign

12/03

C2

https://dazzlingnight.com/post.php

https://rylaconfxilo.tk/post.php

https://seaofsilver.com/post.php

https://kenthehafana.tk/post.php

rc4.plain

rsa_pubkey.plain

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

rundll32.exe

description	pid	pid_target	process	target process
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	968	744	rundll32.exe	EXCEL.EXE

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 4 IoCs

Processes:

msiexec.exe

flow pid process

13 844 msiexec.exe
15 844 msiexec.exe
17 844 msiexec.exe
19 844 msiexec.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

968 rundll32.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

rundll32.exe

description pid process target process

PID 968 set thread context of 844 968 rundll32.exe msiexec.exe
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

EXCEL.EXE

description ioc process

Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE

flow	pid	process
13	844	msiexec.exe
15	844	msiexec.exe
17	844	msiexec.exe
19	844	msiexec.exe

pid	process
968	rundll32.exe

description	pid	process	target process
PID 968 set thread context of 844	968	rundll32.exe	msiexec.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

744 EXCEL.EXE
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

msiexec.exe

description pid process

Token: SeSecurityPrivilege 844 msiexec.exe
Token: SeSecurityPrivilege 844 msiexec.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

744 EXCEL.EXE
744 EXCEL.EXE
744 EXCEL.EXE

pid	process
744	EXCEL.EXE

description	pid	process
Token: SeSecurityPrivilege	844	msiexec.exe
Token: SeSecurityPrivilege	844	msiexec.exe

pid	process
744	EXCEL.EXE
744	EXCEL.EXE
744	EXCEL.EXE

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

EXCEL.EXErundll32.exe

description	pid	process	target process
PID 744 wrote to memory of 968	744	EXCEL.EXE	rundll32.exe
PID 744 wrote to memory of 968	744	EXCEL.EXE	rundll32.exe
PID 744 wrote to memory of 968	744	EXCEL.EXE	rundll32.exe
PID 744 wrote to memory of 968	744	EXCEL.EXE	rundll32.exe
PID 744 wrote to memory of 968	744	EXCEL.EXE	rundll32.exe
PID 744 wrote to memory of 968	744	EXCEL.EXE	rundll32.exe
PID 744 wrote to memory of 968	744	EXCEL.EXE	rundll32.exe
PID 968 wrote to memory of 844	968	rundll32.exe	msiexec.exe
PID 968 wrote to memory of 844	968	rundll32.exe	msiexec.exe
PID 968 wrote to memory of 844	968	rundll32.exe	msiexec.exe
PID 968 wrote to memory of 844	968	rundll32.exe	msiexec.exe
PID 968 wrote to memory of 844	968	rundll32.exe	msiexec.exe
PID 968 wrote to memory of 844	968	rundll32.exe	msiexec.exe
PID 968 wrote to memory of 844	968	rundll32.exe	msiexec.exe
PID 968 wrote to memory of 844	968	rundll32.exe	msiexec.exe
PID 968 wrote to memory of 844	968	rundll32.exe	msiexec.exe

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\Documents_2107120546.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:744

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\sfdgsd.dss,DllRegisterServer
2⤵
- Process spawned unexpected child process
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:968

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
3⤵
- Blocklisted process makes network request
- Suspicious use of AdjustPrivilegeToken
PID:844

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\sfdgsd.dss
MD5
c6b02277b3dd7e0fd1133cf9290cdef6

SHA1
754cc1546ceafe9f62db188e214d5696aed609d5

SHA256
d20f5e6ff3b8af7d2adb395d2fc57b5c35343fc7b17865ccbbc66b66711a3b4c

SHA512
e5702c48ce1dcdde8c059502f4c316ec31dd02ff0995ce33ebadbca913d31d0e213089c162e8cdbe356f7ca806e00ffe5f00f4ccc7ed97b6a09966fad392a701

Download Submit
\Users\Admin\sfdgsd.dss
MD5
c6b02277b3dd7e0fd1133cf9290cdef6

SHA1
754cc1546ceafe9f62db188e214d5696aed609d5

SHA256
d20f5e6ff3b8af7d2adb395d2fc57b5c35343fc7b17865ccbbc66b66711a3b4c

SHA512
e5702c48ce1dcdde8c059502f4c316ec31dd02ff0995ce33ebadbca913d31d0e213089c162e8cdbe356f7ca806e00ffe5f00f4ccc7ed97b6a09966fad392a701

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memory/744-2-0x000000002F521000-0x000000002F524000-memory.dmp

Filesize
12KB

Download
memory/744-3-0x0000000071441000-0x0000000071443000-memory.dmp

Filesize
8KB

Download
memory/744-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

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memory/844-12-0x0000000000000000-mapping.dmp

Download
memory/844-14-0x00000000000F0000-0x0000000000119000-memory.dmp

Filesize
164KB

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memory/968-6-0x0000000000000000-mapping.dmp

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memory/968-7-0x0000000075E51000-0x0000000075E53000-memory.dmp

Filesize
8KB

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memory/968-10-0x000000006C560000-0x000000006C589000-memory.dmp

Filesize
164KB

Download
memory/968-11-0x0000000000180000-0x0000000000181000-memory.dmp

Filesize
4KB

Download
memory/1768-5-0x000007FEF62A0000-0x000007FEF651A000-memory.dmp

Filesize
2.5MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads