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

Downloads MZ/PE file 1 IoCs

flow	pid	Process
46	444	Process not Found

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
228	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
228	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe
3976	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 228 set thread context of 3976	228	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe	89

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 3 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	MicrosoftEdgeUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
448	MicrosoftEdgeUpdate.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
228	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 228 wrote to memory of 3976	228	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe	89
PID 228 wrote to memory of 3976	228	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe	89
PID 228 wrote to memory of 3976	228	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe	89
PID 228 wrote to memory of 3976	228	5f6366e20fde275710415f996748edb9f1091c0b0e47bf2ddc91a59ecd90d54cN.exe	89

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:228
- 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:3976

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIxIiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDU4NjAiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODIxNjMwOTAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1MzYzMDkzNjk4Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:448

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

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\nshA615.tmp\System.dll

Filesize
11KB

MD5
0063d48afe5a0cdc02833145667b6641

SHA1
e7eb614805d183ecb1127c62decb1a6be1b4f7a8

SHA256
ac9dfe3b35ea4b8932536ed7406c29a432976b685cc5322f94ef93df920fede7

SHA512
71cbbcaeb345e09306e368717ea0503fe8df485be2e95200febc61bcd8ba74fb4211cd263c232f148c0123f6c6f2e3fd4ea20bdecc4070f5208c35c6920240f0

Download Submit
memory/228-10-0x00000000041F0000-0x0000000005B76000-memory.dmp

Filesize
25.5MB

Download
memory/228-11-0x00000000041F0000-0x0000000005B76000-memory.dmp

Filesize
25.5MB

Download
memory/228-12-0x0000000077021000-0x0000000077141000-memory.dmp

Filesize
1.1MB

Download
memory/228-13-0x00000000736F4000-0x00000000736F5000-memory.dmp

Filesize
4KB

Download
memory/3976-14-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3976-15-0x0000000001660000-0x0000000002FE6000-memory.dmp

Filesize
25.5MB

Download
memory/3976-16-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3976-17-0x0000000001660000-0x0000000002FE6000-memory.dmp

Filesize
25.5MB

Download
memory/3976-18-0x0000000077021000-0x0000000077141000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing