zloader | d4592471179f7d3fbd94be05591c09c74b0d8b7dcca580504694c7514c1d9ef0

General

Target

case (1522).xls
Size

153KB
MD5

933ac69cb772d6e28636a81fc7665a26
SHA1

7bb7870ebb261a2e0302600330abbc819d00acd3
SHA256

d4592471179f7d3fbd94be05591c09c74b0d8b7dcca580504694c7514c1d9ef0
SHA512

e4be1fa90192bb991468ce7edd1b951358de9287f26a1975a82ac60ded95ca9d337a0b89dc1deacc9ef836077c7345c4067de99bf82d15a406b6b3ce53ad8b52

Score

10^/10

zloader kev 26/01 botnet ransomware trojan

Malware Config

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.

Processes:

rundll32.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	860	4000	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 2 IoCs

Processes:

msiexec.exe

flow pid process

32 776 msiexec.exe
33 776 msiexec.exe
Loads dropped DLL 2 IoCs

Processes:

rundll32.exe

pid process

1904 rundll32.exe
1904 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

Processes:

rundll32.exe

description pid process target process

PID 1904 set thread context of 776 1904 rundll32.exe msiexec.exe

flow	pid	process
32	776	msiexec.exe
33	776	msiexec.exe

pid	process
1904	rundll32.exe
1904	rundll32.exe

description	pid	process	target process
PID 1904 set thread context of 776	1904	rundll32.exe	msiexec.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

4000 EXCEL.EXE
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

msiexec.exe

description pid process

Token: SeSecurityPrivilege 776 msiexec.exe
Token: SeSecurityPrivilege 776 msiexec.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

4000 EXCEL.EXE
4000 EXCEL.EXE

description	pid	process
Token: SeSecurityPrivilege	776	msiexec.exe
Token: SeSecurityPrivilege	776	msiexec.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

EXCEL.EXErundll32.exerundll32.exe

description	pid	process	target process
PID 4000 wrote to memory of 860	4000	EXCEL.EXE	rundll32.exe
PID 4000 wrote to memory of 860	4000	EXCEL.EXE	rundll32.exe
PID 860 wrote to memory of 1904	860	rundll32.exe	rundll32.exe
PID 860 wrote to memory of 1904	860	rundll32.exe	rundll32.exe
PID 860 wrote to memory of 1904	860	rundll32.exe	rundll32.exe
PID 1904 wrote to memory of 776	1904	rundll32.exe	msiexec.exe
PID 1904 wrote to memory of 776	1904	rundll32.exe	msiexec.exe
PID 1904 wrote to memory of 776	1904	rundll32.exe	msiexec.exe
PID 1904 wrote to memory of 776	1904	rundll32.exe	msiexec.exe
PID 1904 wrote to memory of 776	1904	rundll32.exe	msiexec.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\case (1522).xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4000

C:\Windows\System32\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\ProgramData\formnet.dll,DllRegisterServer
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:860

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\ProgramData\formnet.dll,DllRegisterServer
3⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1904

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
4⤵
- Blocklisted process makes network request
- Suspicious use of AdjustPrivilegeToken
PID:776

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

3

T1082

Query Registry

2

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\ProgramData\formnet.dll
MD5
b0f3fa047f6ae39a145fd364f693638e

SHA1
1951696d8aca4a31614bb68f9da392402785e14e

SHA256
0bf22b8f9aaef21afe71fcbbea62325e7582dad410b0a537f38a9eb8e6855890

SHA512
86e4516705380617a9f48b2e1cd7d9e676439398b802eb6047cd478d4b10bf8f4ba20e019f337b01761fa247cd631ccab22851f078089c2e1c61574bca9f5b98

Download Submit
\ProgramData\formnet.dll
MD5
b0f3fa047f6ae39a145fd364f693638e

SHA1
1951696d8aca4a31614bb68f9da392402785e14e

SHA256
0bf22b8f9aaef21afe71fcbbea62325e7582dad410b0a537f38a9eb8e6855890

SHA512
86e4516705380617a9f48b2e1cd7d9e676439398b802eb6047cd478d4b10bf8f4ba20e019f337b01761fa247cd631ccab22851f078089c2e1c61574bca9f5b98

Download Submit
\ProgramData\formnet.dll
MD5
b0f3fa047f6ae39a145fd364f693638e

SHA1
1951696d8aca4a31614bb68f9da392402785e14e

SHA256
0bf22b8f9aaef21afe71fcbbea62325e7582dad410b0a537f38a9eb8e6855890

SHA512
86e4516705380617a9f48b2e1cd7d9e676439398b802eb6047cd478d4b10bf8f4ba20e019f337b01761fa247cd631ccab22851f078089c2e1c61574bca9f5b98

Download Submit
memory/776-16-0x0000000000A30000-0x0000000000A56000-memory.dmp

Filesize
152KB

Download
memory/776-15-0x0000000000000000-mapping.dmp

Download
memory/860-7-0x0000000000000000-mapping.dmp

Download
memory/1904-12-0x00000000042A1000-0x0000000004370000-memory.dmp

Filesize
828KB

Download
memory/1904-9-0x0000000000000000-mapping.dmp

Download
memory/1904-13-0x00000000042A0000-0x00000000042C6000-memory.dmp

Filesize
152KB

Download
memory/1904-14-0x0000000000840000-0x0000000000841000-memory.dmp

Filesize
4KB

Download
memory/4000-5-0x00007FFCC0350000-0x00007FFCC0987000-memory.dmp

Filesize
6.2MB

Download
memory/4000-2-0x00007FFC9C810000-0x00007FFC9C820000-memory.dmp

Filesize
64KB

Download
memory/4000-6-0x00007FFC9C810000-0x00007FFC9C820000-memory.dmp

Filesize
64KB

Download
memory/4000-4-0x00007FFC9C810000-0x00007FFC9C820000-memory.dmp

Filesize
64KB

Download
memory/4000-3-0x00007FFC9C810000-0x00007FFC9C820000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads