guloader | 5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54c

General

Target

5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe
Size

854KB
MD5

c872967e9175a5345d11a0a7ba1a2240
SHA1

1a7a1388ee67fde14c22a38f9a630aecae796272
SHA256

5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54c
SHA512

f6d2e5938b450b38e4d311c994afc59093342c5305165380a0dc3bc8491c561d30fc4ca9049861d6df0d466bde1d204e606d71e5a554eadf89c2c6232d235f9e
SSDEEP

12288:wrRquUH6UROvPORRu4B5jPlxxsUzZbhuOWzM6QnVKEYyO/7zieeP:j/H6URd/B5Zxx3zZ9uFzTEKE7Oaeq

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

Guloader family
guloader
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

description	ioc	Process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe

Loads dropped DLL 1 IoCs

pid	Process
2660	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2660	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe
2848	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2660 set thread context of 2848	2660	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe	29

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2660	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2660 wrote to memory of 2848	2660	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe	29
PID 2660 wrote to memory of 2848	2660	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe	29
PID 2660 wrote to memory of 2848	2660	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe	29
PID 2660 wrote to memory of 2848	2660	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe	29
PID 2660 wrote to memory of 2848	2660	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe	29

C:\Users\Admin\AppData\Local\Temp\5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe
"C:\Users\Admin\AppData\Local\Temp\5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2660
- C:\Users\Admin\AppData\Local\Temp\5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe
  "C:\Users\Admin\AppData\Local\Temp\5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2848

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nsz3D41.tmp\System.dll

Filesize
11KB

MD5
0063d48afe5a0cdc02833145667b6641

SHA1
e7eb614805d183ecb1127c62decb1a6be1b4f7a8

SHA256
ac9dfe3b35ea4b8932536ed7406c29a432976b685cc5322f94ef93df920fede7

SHA512
71cbbcaeb345e09306e368717ea0503fe8df485be2e95200febc61bcd8ba74fb4211cd263c232f148c0123f6c6f2e3fd4ea20bdecc4070f5208c35c6920240f0

Download Submit
memory/2660-11-0x0000000003200000-0x0000000004B86000-memory.dmp

Filesize
25.5MB

Download
memory/2660-12-0x0000000003200000-0x0000000004B86000-memory.dmp

Filesize
25.5MB

Download
memory/2660-13-0x00000000775C1000-0x00000000776C2000-memory.dmp

Filesize
1.0MB

Download
memory/2660-14-0x00000000775C0000-0x0000000077769000-memory.dmp

Filesize
1.7MB

Download
memory/2660-28-0x0000000003200000-0x0000000004B86000-memory.dmp

Filesize
25.5MB

Download
memory/2848-16-0x00000000775C0000-0x0000000077769000-memory.dmp

Filesize
1.7MB

Download
memory/2848-15-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2848-17-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2848-19-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download

Analysis

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