guloader | b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
14-11-2024 06:16

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General

Target

Trykblgens.exe
Size

354KB
MD5

0f34c819b26907e1508f9cc886cd5440
SHA1

790d7283f25f77ad24de07368194d4266c24f051
SHA256

b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92
SHA512

9b359aaa21b81d6751f3ff1061286a7118847427a07b449e2d31f5dfad55d9ce6cd958b7e70b0d62cbe1b1bb4924af2673a35049ab821d5a57657bb077f55c8d
SSDEEP

6144:tNDlOlZOvRQmfszRZBdhOSmhhyDRXR0OjN5c/9WG3ktHhpBnyv+bx2MTxrLM37Vh:tsZOv09dhOSmCVhjg/9WG3QBPyv+9Zt

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

Processes:

Trykblgens.exeTrykblgens.exe

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

Loads dropped DLL 1 IoCs

Processes:

Trykblgens.exe

pid process

4744 Trykblgens.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

Trykblgens.exeTrykblgens.exe

pid process

4744 Trykblgens.exe
2832 Trykblgens.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

Trykblgens.exe

description pid process target process

PID 4744 set thread context of 2832 4744 Trykblgens.exe Trykblgens.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4744	Trykblgens.exe

pid	process
4744	Trykblgens.exe
2832	Trykblgens.exe

description	pid	process	target process
PID 4744 set thread context of 2832	4744	Trykblgens.exe	Trykblgens.exe

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

Processes:

Trykblgens.exeTrykblgens.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Trykblgens.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Trykblgens.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

Trykblgens.exe

pid process

4744 Trykblgens.exe

pid	process
4744	Trykblgens.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

Trykblgens.exe

description	pid	process	target process
PID 4744 wrote to memory of 2832	4744	Trykblgens.exe	Trykblgens.exe
PID 4744 wrote to memory of 2832	4744	Trykblgens.exe	Trykblgens.exe
PID 4744 wrote to memory of 2832	4744	Trykblgens.exe	Trykblgens.exe
PID 4744 wrote to memory of 2832	4744	Trykblgens.exe	Trykblgens.exe
PID 4744 wrote to memory of 2832	4744	Trykblgens.exe	Trykblgens.exe

C:\Users\Admin\AppData\Local\Temp\Trykblgens.exe
"C:\Users\Admin\AppData\Local\Temp\Trykblgens.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:4744
- C:\Users\Admin\AppData\Local\Temp\Trykblgens.exe
  "C:\Users\Admin\AppData\Local\Temp\Trykblgens.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2832

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\nsqA1BF.tmp\System.dll

Filesize
12KB

MD5
8cf2ac271d7679b1d68eefc1ae0c5618

SHA1
7cc1caaa747ee16dc894a600a4256f64fa65a9b8

SHA256
6950991102462d84fdc0e3b0ae30c95af8c192f77ce3d78e8d54e6b22f7c09ba

SHA512
ce828fb9ecd7655cc4c974f78f209d3326ba71ced60171a45a437fc3fff3bd0d69a0997adaca29265c7b5419bdea2b17f8cc8ceae1b8ce6b22b7ed9120bb5ad3

Download Submit
memory/2832-14-0x0000000000450000-0x000000000130E000-memory.dmp

Filesize
14.7MB

Download
memory/2832-15-0x0000000077148000-0x0000000077149000-memory.dmp

Filesize
4KB

Download
memory/2832-16-0x0000000077165000-0x0000000077166000-memory.dmp

Filesize
4KB

Download
memory/2832-17-0x0000000000450000-0x000000000130E000-memory.dmp

Filesize
14.7MB

Download
memory/2832-18-0x0000000072A20000-0x0000000073C74000-memory.dmp

Filesize
18.3MB

Download
memory/2832-19-0x00000000770C1000-0x00000000771E1000-memory.dmp

Filesize
1.1MB

Download
memory/4744-10-0x0000000004A00000-0x00000000058BE000-memory.dmp

Filesize
14.7MB

Download
memory/4744-11-0x00000000770C1000-0x00000000771E1000-memory.dmp

Filesize
1.1MB

Download
memory/4744-12-0x0000000073F25000-0x0000000073F26000-memory.dmp

Filesize
4KB

Download
memory/4744-13-0x0000000004A00000-0x00000000058BE000-memory.dmp

Filesize
14.7MB

Download