guloader | 9ac04c980e1d877c558fc9218766386ec896bcce2d675cd25ecaa74b990b08fa

Analysis

max time kernel
149s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
24-12-2024 09:47

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General

Target

WTF.exe
Size

344KB
MD5

9b3059448f3fa6da827ef925f9f86e33
SHA1

9854bd2c791a99d6409c66ea0f5806d615720e20
SHA256

8e9488d20c505541485cbaf7a2716c0567512de6f3f87bb34b5ddc87a0fe78b9
SHA512

f74f8dfe9f88ffc69e0d71c442b6195640a145da11c7d2bca5529710fa8fed2355d63e68e160f991a8c9d822561ce7e0d518a0075ef48710be3b24b26ea5cda0
SSDEEP

6144:IbE/HU7YLR1SIk6HRa5fjt/iW3DIM4xIhM1IiQ/q+A9TgOCkjMJCRu0Wp3Ww:IbALvSCHWf1tiQC+A9Tbz03Ww

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	WTF.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	WTF.exe

Loads dropped DLL 1 IoCs

pid	Process
4720	WTF.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4720	WTF.exe
2100	WTF.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4720 set thread context of 2100	4720	WTF.exe	83

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	WTF.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WTF.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4720	WTF.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4720 wrote to memory of 2100	4720	WTF.exe	83
PID 4720 wrote to memory of 2100	4720	WTF.exe	83
PID 4720 wrote to memory of 2100	4720	WTF.exe	83
PID 4720 wrote to memory of 2100	4720	WTF.exe	83

C:\Users\Admin\AppData\Local\Temp\WTF.exe
"C:\Users\Admin\AppData\Local\Temp\WTF.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:4720
- C:\Users\Admin\AppData\Local\Temp\WTF.exe
  "C:\Users\Admin\AppData\Local\Temp\WTF.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2100

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nslC93C.tmp\System.dll

Filesize
12KB

MD5
cff85c549d536f651d4fb8387f1976f2

SHA1
d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

SHA256
8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

SHA512
531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

Download Submit
memory/2100-10-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2100-11-0x0000000001660000-0x0000000001760000-memory.dmp

Filesize
1024KB

Download
memory/2100-12-0x0000000001660000-0x0000000001760000-memory.dmp

Filesize
1024KB

Download
memory/2100-13-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4720-5-0x0000000002AD0000-0x0000000002C20000-memory.dmp

Filesize
1.3MB

Download
memory/4720-6-0x00000000773D1000-0x00000000774F1000-memory.dmp

Filesize
1.1MB

Download
memory/4720-7-0x0000000002AD0000-0x0000000002C20000-memory.dmp

Filesize
1.3MB

Download
memory/4720-8-0x00000000773D1000-0x00000000774F1000-memory.dmp

Filesize
1.1MB

Download
memory/4720-9-0x0000000002AD0000-0x0000000002C20000-memory.dmp

Filesize
1.3MB

Download