guloader | 98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6

Analysis

max time kernel
142s
max time network
237s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
29-01-2023 15:21

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General

Target

98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe
Size

100KB
MD5

b4dbd048b22d8e94490388cae3c59928
SHA1

d001c360adec029f459b03cdb7bcad0bcf419814
SHA256

98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6
SHA512

496a36a47ad1e58b0433d3d983b9b5225ba31a7ce899f66f41dca732476c7acd32d8482e11c4dec007b9190cb370fbade45dc0a265579ece573d01e45fd0ad6b
SSDEEP

1536:1WWTwV4fVhubszPs45N/igfQAIqcc0423pN1lA6XVCiHX:5wVUPhzEWN/NoKj23r1lA6XVCiX

Score

10^/10

guloader downloader

Malware Config

Extracted

Family

guloader

https://cdn.discordapp.com/attachments/807722001241210933/813865812821409822/ePbJss27.bin

xor.base64

Signatures

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

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

Processes:

98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe

pid	process
2232	98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe
4396	98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe

description	pid	process	target process
PID 2232 set thread context of 4396	2232	98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe	98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe

pid process

2232 98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe

pid process

2232 98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe

description	pid	process	target process
PID 2232 wrote to memory of 4396	2232	98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe	98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe
PID 2232 wrote to memory of 4396	2232	98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe	98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe
PID 2232 wrote to memory of 4396	2232	98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe	98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe
PID 2232 wrote to memory of 4396	2232	98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe	98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe

C:\Users\Admin\AppData\Local\Temp\98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe
"C:\Users\Admin\AppData\Local\Temp\98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe"
1⤵
- Checks QEMU agent file
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2232
- C:\Users\Admin\AppData\Local\Temp\98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe
  "C:\Users\Admin\AppData\Local\Temp\98be1a60aeeb3e42443c670b0e9f185c07b776e2347b8f4e58f7cc85c12fb3e6.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:4396

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2232-134-0x0000000002290000-0x000000000229D000-memory.dmp

Filesize
52KB

Download
memory/2232-135-0x00007FFB11270000-0x00007FFB11465000-memory.dmp

Filesize
2.0MB

Download
memory/2232-139-0x0000000002290000-0x000000000229D000-memory.dmp

Filesize
52KB

Download
memory/2232-141-0x0000000077180000-0x0000000077323000-memory.dmp

Filesize
1.6MB

Download
memory/4396-136-0x0000000000000000-mapping.dmp

Download
memory/4396-137-0x0000000000400000-0x000000000055D000-memory.dmp

Filesize
1.4MB

Download
memory/4396-140-0x0000000000401000-0x0000000000506000-memory.dmp

Filesize
1.0MB

Download
memory/4396-143-0x00007FFB11270000-0x00007FFB11465000-memory.dmp

Filesize
2.0MB

Download
memory/4396-142-0x0000000000560000-0x0000000000660000-memory.dmp

Filesize
1024KB

Download
memory/4396-144-0x0000000077180000-0x0000000077323000-memory.dmp

Filesize
1.6MB

Download
memory/4396-145-0x0000000000560000-0x0000000000660000-memory.dmp

Filesize
1024KB

Download