guloader | 34125118c603cbb2c4f6e6362e28ab2b8162de4eadf86dcda60c9df74b8be350

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-11-2024 20:44

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General

Target

d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe
Size

164KB
MD5

0040a650409cbf4a64597ee1f64b874f
SHA1

3a54dce238334d6d59ba7a796a43e86c917478a8
SHA256

d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7
SHA512

e54cfb9af724864753a8a6eede4b1ffa5b1e95e8082d5c306f6ad16342af2e48bcb4bf6b137ca43407970cb18ebab16580eeeaf50d425d06fe40e761d93dda49
SSDEEP

3072:etOcNsL93qdY0F51nCyBQifSgwKAs/RF53IyVx1rm7gwc3yGChGZrjFZxFsKdxw6:eUV0rC3i6gys/RF53IyVx1rm7gwc3yG3

Score

10^/10

guloader discovery downloader

Malware Config

Extracted

Family

guloader

http://45.85.90.226/kt.bin

xor.base64

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	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
532	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe
3596	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 532 set thread context of 3596	532	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe	96

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	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
532	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
532	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 532 wrote to memory of 3596	532	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe	96
PID 532 wrote to memory of 3596	532	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe	96
PID 532 wrote to memory of 3596	532	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe	96
PID 532 wrote to memory of 3596	532	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe	96

C:\Users\Admin\AppData\Local\Temp\d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe
"C:\Users\Admin\AppData\Local\Temp\d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe"
1⤵
- Checks QEMU agent file
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:532
- C:\Users\Admin\AppData\Local\Temp\d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe
  "C:\Users\Admin\AppData\Local\Temp\d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:3596

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

memory/532-2-0x0000000002370000-0x000000000237B000-memory.dmp

Filesize
44KB

Download
memory/532-3-0x0000000002370000-0x000000000237B000-memory.dmp

Filesize
44KB

Download
memory/532-4-0x0000000077671000-0x0000000077791000-memory.dmp

Filesize
1.1MB

Download
memory/532-7-0x0000000002370000-0x000000000237B000-memory.dmp

Filesize
44KB

Download
memory/3596-5-0x0000000000400000-0x000000000055D000-memory.dmp

Filesize
1.4MB

Download
memory/3596-8-0x0000000000560000-0x0000000000660000-memory.dmp

Filesize
1024KB

Download
memory/3596-9-0x0000000000400000-0x000000000055D000-memory.dmp

Filesize
1.4MB

Download