zloader | 28ce05e2ebeec4b1754d5ffcfe3e4486e8e9201f375da899aef2ea6d3b02dd60

General

Target
case (4374).xls
Size 153KB
Sample210126-srjs948kde
SHA256 28ce05e2ebeec4b1754d5ffcfe3e4486e8e9201f375da899aef2ea6d3b02dd60
MD5 2bc3acec77fec6f8a78b77c5efb5c5ee
SHA1 e4b3f2149b6d7b8ad912b127bd8ad9fb0eb0246b
SHA512 a05914b1504997c5e52468987a20b9f2b877d665f510d985b0aa9798c936252d39986efd3e49f929c383550db1a200ba2c66c049e6340ef391d922553e828854
MD5 SHA1 SHA512

Score

10^/10

zloader kev 26/01 botnet ransomware trojan

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
https://coopacaustro.com/kev/scfrd.dll

Extracted

Family

zloader

Botnet

kev

Campaign

26/01

C2

https://gadgetswolf.com/post.php
https://homesoapmolds.com/post.php
https://govemedico.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.

description	pid	pid_target	Process	procid_target
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1176	892	rundll32.exe	24

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 3 IoCs

flow	pid	Process
12	1948	msiexec.exe
14	1948	msiexec.exe
16	1948	msiexec.exe

Loads dropped DLL 4 IoCs

pid	Process
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
ransomware

System Information Discovery
T1082

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1176 set thread context of 1948	1176	rundll32.exe	33

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

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

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	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
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
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 (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
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 (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
892	EXCEL.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeSecurityPrivilege	1948	msiexec.exe
Token: SeSecurityPrivilege	1948	msiexec.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
892	EXCEL.EXE
892	EXCEL.EXE
892	EXCEL.EXE

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 892 wrote to memory of 1176	892	EXCEL.EXE	31
PID 892 wrote to memory of 1176	892	EXCEL.EXE	31
PID 892 wrote to memory of 1176	892	EXCEL.EXE	31
PID 892 wrote to memory of 1176	892	EXCEL.EXE	31
PID 892 wrote to memory of 1176	892	EXCEL.EXE	31
PID 892 wrote to memory of 1176	892	EXCEL.EXE	31
PID 892 wrote to memory of 1176	892	EXCEL.EXE	31
PID 1176 wrote to memory of 1948	1176	rundll32.exe	33
PID 1176 wrote to memory of 1948	1176	rundll32.exe	33
PID 1176 wrote to memory of 1948	1176	rundll32.exe	33
PID 1176 wrote to memory of 1948	1176	rundll32.exe	33
PID 1176 wrote to memory of 1948	1176	rundll32.exe	33
PID 1176 wrote to memory of 1948	1176	rundll32.exe	33
PID 1176 wrote to memory of 1948	1176	rundll32.exe	33
PID 1176 wrote to memory of 1948	1176	rundll32.exe	33
PID 1176 wrote to memory of 1948	1176	rundll32.exe	33

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\case (4374).xls"
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:892
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\System32\rundll32.exe" C:\ProgramData\formnet.dll,DllRegisterServer
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1176
- - C:\Windows\SysWOW64\msiexec.exe
    msiexec.exe
    3⤵
    - Blocklisted process makes network request
    - Suspicious use of AdjustPrivilegeToken
    PID:1948

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/892-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

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memory/892-2-0x000000002FE71000-0x000000002FE74000-memory.dmp

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memory/892-3-0x00000000713C1000-0x00000000713C3000-memory.dmp

Download

memory/1176-7-0x0000000075BF1000-0x0000000075BF3000-memory.dmp

Download

memory/1176-13-0x0000000000480000-0x00000000004A6000-memory.dmp

Download

memory/1176-14-0x00000000000C0000-0x00000000000C1000-memory.dmp

Download

memory/1800-5-0x000007FEF74A0000-0x000007FEF771A000-memory.dmp

Download

memory/1948-17-0x00000000000D0000-0x00000000000F6000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads