guloader | 51aec932db01fc08aec8d681c44129d3850bb8a60dfe4632a28eda582123325c

Analysis

max time kernel
71s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20220718-en
resource tags

arch:x64arch:x86image:win10v2004-20220718-enlocale:en-usos:windows10-2004-x64system
submitted
18-07-2022 13:28

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General

Target

SOA.exe
Size

188KB
MD5

513180affbaff85bb0fc7cfda975eed0
SHA1

2c2a6467f735c400cd6d6b7bd134c88170b53c64
SHA256

05804946495c374598d2e32fe407b86a8668fb67b28591953ee320e3b71d63c3
SHA512

88c0e48c17ee5f0e15d0047934e5f4dc845dadf56bbd4304e8dfe8283c1e6f52282c4a602da872abc5bc769c6c569d5d1755d331c7e396ee742f1b81ab003675

Score

10^/10

guloader downloader guloader

Malware Config

Extracted

Family

guloader

https://drive.google.com/uc?export=download&id=1fnZYdfwUJYzHFLrXgG7wIq6WxcijjIHV

xor.base64

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Guloader payload 2 IoCs

guloader

Processes:

resource	yara_rule
behavioral2/memory/1048-132-0x0000000000000000-mapping.dmp	family_guloader
behavioral2/memory/1048-136-0x0000000001300000-0x0000000001400000-memory.dmp	family_guloader

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

SOA.exeRegAsm.exe

pid process

868 SOA.exe
1048 RegAsm.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

SOA.exe

description pid process target process

PID 868 set thread context of 1048 868 SOA.exe RegAsm.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

SOA.exe

pid process

868 SOA.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

SOA.exe

pid process

868 SOA.exe

pid	process
868	SOA.exe
1048	RegAsm.exe

description	pid	process	target process
PID 868 set thread context of 1048	868	SOA.exe	RegAsm.exe

pid	process
868	SOA.exe

pid	process
868	SOA.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

SOA.exe

description	pid	process	target process
PID 868 wrote to memory of 1048	868	SOA.exe	RegAsm.exe
PID 868 wrote to memory of 1048	868	SOA.exe	RegAsm.exe
PID 868 wrote to memory of 1048	868	SOA.exe	RegAsm.exe
PID 868 wrote to memory of 1048	868	SOA.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\SOA.exe
"C:\Users\Admin\AppData\Local\Temp\SOA.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:868

C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
"C:\Users\Admin\AppData\Local\Temp\SOA.exe"
2⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:1048

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

T1102

Impact

Replay Monitor

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Downloads

memory/868-133-0x00000000022A0000-0x00000000022AA000-memory.dmp

Filesize
40KB

Download
memory/868-134-0x00007FF8CC4B0000-0x00007FF8CC6A5000-memory.dmp

Filesize
2.0MB

Download
memory/868-135-0x0000000077AD0000-0x0000000077C73000-memory.dmp

Filesize
1.6MB

Download
memory/868-141-0x00000000022A0000-0x00000000022AA000-memory.dmp

Filesize
40KB

Download
memory/868-142-0x0000000077AD0000-0x0000000077C73000-memory.dmp

Filesize
1.6MB

Download
memory/1048-132-0x0000000000000000-mapping.dmp

Download
memory/1048-137-0x00007FF8CC4B0000-0x00007FF8CC6A5000-memory.dmp

Filesize
2.0MB

Download
memory/1048-136-0x0000000001300000-0x0000000001400000-memory.dmp

Filesize
1024KB

Download
memory/1048-138-0x0000000077AD0000-0x0000000077C73000-memory.dmp

Filesize
1.6MB

Download
memory/1048-139-0x00007FF8CC4B0000-0x00007FF8CC6A5000-memory.dmp

Filesize
2.0MB

Download
memory/1048-140-0x0000000077AD0000-0x0000000077C73000-memory.dmp

Filesize
1.6MB

Download