guloader | 11ea8640caec973b1823c96000bd50a2c604317888111273f7e93a37412fa2a9

Analysis

max time kernel
149s
max time network
137s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
30-01-2023 08:14

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General

Target

BookingDetails77#6276.exe
Size

575KB
MD5

21bf08d7ebefc5793425948710c808c5
SHA1

7979095366362b5e07a1845e29d5989245dc5f6b
SHA256

11ea8640caec973b1823c96000bd50a2c604317888111273f7e93a37412fa2a9
SHA512

43f0a55c39ffb09e6b994673817fb57935c17a6e3a8c5b10f089403da58616ad92f1e8aa842e73ce6299c4fdec4eab2d3c702180f8c97ed11bed80480be5ca7e
SSDEEP

12288:b7EWNDJccwIWYh7jBw383vKmgKuICqwfmcNjRtBnMAr82:MUlyYtjDKmgmChOsNfC2

Score

10^/10

guloader discovery downloader

Malware Config

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:

ieinstal.exeBookingDetails77#6276.exe

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	ieinstal.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	BookingDetails77#6276.exe

Loads dropped DLL 1 IoCs

Processes:

BookingDetails77#6276.exe

pid process

4944 BookingDetails77#6276.exe
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

Processes:

ieinstal.exe

pid process

3564 ieinstal.exe
3564 ieinstal.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

BookingDetails77#6276.exeieinstal.exe

pid process

4944 BookingDetails77#6276.exe
3564 ieinstal.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

BookingDetails77#6276.exe

description pid process target process

PID 4944 set thread context of 3564 4944 BookingDetails77#6276.exe ieinstal.exe
Drops file in Windows directory 1 IoCs

Processes:

BookingDetails77#6276.exe

description ioc process

File opened for modification C:\Windows\resources\0409\Vre\Prstekrave\Uskadeliggjort.Pun BookingDetails77#6276.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

BookingDetails77#6276.exe

pid process

4944 BookingDetails77#6276.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

ieinstal.exe

pid process

3564 ieinstal.exe

pid	process
4944	BookingDetails77#6276.exe

pid	process
3564	ieinstal.exe
3564	ieinstal.exe

pid	process
4944	BookingDetails77#6276.exe
3564	ieinstal.exe

description	pid	process	target process
PID 4944 set thread context of 3564	4944	BookingDetails77#6276.exe	ieinstal.exe

description	ioc	process
File opened for modification	C:\Windows\resources\0409\Vre\Prstekrave\Uskadeliggjort.Pun	BookingDetails77#6276.exe

pid	process
4944	BookingDetails77#6276.exe

pid	process
3564	ieinstal.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

BookingDetails77#6276.exe

description	pid	process	target process
PID 4944 wrote to memory of 3564	4944	BookingDetails77#6276.exe	ieinstal.exe
PID 4944 wrote to memory of 3564	4944	BookingDetails77#6276.exe	ieinstal.exe
PID 4944 wrote to memory of 3564	4944	BookingDetails77#6276.exe	ieinstal.exe
PID 4944 wrote to memory of 3564	4944	BookingDetails77#6276.exe	ieinstal.exe

C:\Users\Admin\AppData\Local\Temp\BookingDetails77#6276.exe
"C:\Users\Admin\AppData\Local\Temp\BookingDetails77#6276.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4944

C:\Program Files (x86)\internet explorer\ieinstal.exe
"C:\Users\Admin\AppData\Local\Temp\BookingDetails77#6276.exe"
2⤵
- Checks QEMU agent file
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
PID:3564

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

T1102

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsx813D.tmp\System.dll
Filesize
11KB

MD5
9625d5b1754bc4ff29281d415d27a0fd

SHA1
80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

SHA256
c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

SHA512
dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

Download Submit
memory/3564-141-0x00007FFBECE30000-0x00007FFBED025000-memory.dmp

Filesize
2.0MB

Download
memory/3564-137-0x0000000000000000-mapping.dmp

Download
memory/3564-138-0x0000000000C00000-0x00000000057D7000-memory.dmp

Filesize
75.8MB

Download
memory/3564-140-0x0000000000C00000-0x00000000057D7000-memory.dmp

Filesize
75.8MB

Download
memory/3564-142-0x0000000077770000-0x0000000077913000-memory.dmp

Filesize
1.6MB

Download
memory/3564-143-0x00007FFBECE30000-0x00007FFBED025000-memory.dmp

Filesize
2.0MB

Download
memory/3564-144-0x0000000077770000-0x0000000077913000-memory.dmp

Filesize
1.6MB

Download
memory/4944-134-0x0000000004220000-0x0000000008DF7000-memory.dmp

Filesize
75.8MB

Download
memory/4944-135-0x00007FFBECE30000-0x00007FFBED025000-memory.dmp

Filesize
2.0MB

Download
memory/4944-136-0x0000000077770000-0x0000000077913000-memory.dmp

Filesize
1.6MB

Download
memory/4944-139-0x0000000077770000-0x0000000077913000-memory.dmp

Filesize
1.6MB

Download
memory/4944-133-0x0000000004220000-0x0000000008DF7000-memory.dmp

Filesize
75.8MB

Download