guloader | b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92

General

Target

b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.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:

b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exeb199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe

Loads dropped DLL 1 IoCs

Processes:

b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe

pid process

4736 b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exeb199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe

pid	process
4736	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe
228	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe

description	pid	process	target process
PID 4736 set thread context of 228	4736	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe

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

Processes:

b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exeb199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe

pid process

4736 b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe

description	pid	process	target process
PID 4736 wrote to memory of 228	4736	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe
PID 4736 wrote to memory of 228	4736	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe
PID 4736 wrote to memory of 228	4736	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe
PID 4736 wrote to memory of 228	4736	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe
PID 4736 wrote to memory of 228	4736	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe	b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe

C:\Users\Admin\AppData\Local\Temp\b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe
"C:\Users\Admin\AppData\Local\Temp\b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.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:4736
- C:\Users\Admin\AppData\Local\Temp\b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe
  "C:\Users\Admin\AppData\Local\Temp\b199b1b1500796c646cfb42f1175b84b7e1493694a80bea9d5de5a0550ed4f92.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:228

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsk9319.tmp\System.dll

Filesize
12KB

MD5
8cf2ac271d7679b1d68eefc1ae0c5618

SHA1
7cc1caaa747ee16dc894a600a4256f64fa65a9b8

SHA256
6950991102462d84fdc0e3b0ae30c95af8c192f77ce3d78e8d54e6b22f7c09ba

SHA512
ce828fb9ecd7655cc4c974f78f209d3326ba71ced60171a45a437fc3fff3bd0d69a0997adaca29265c7b5419bdea2b17f8cc8ceae1b8ce6b22b7ed9120bb5ad3

Download Submit
memory/228-14-0x0000000000450000-0x000000000130E000-memory.dmp

Filesize
14.7MB

Download
memory/228-15-0x0000000076FE8000-0x0000000076FE9000-memory.dmp

Filesize
4KB

Download
memory/228-16-0x0000000077005000-0x0000000077006000-memory.dmp

Filesize
4KB

Download
memory/228-17-0x0000000000450000-0x000000000130E000-memory.dmp

Filesize
14.7MB

Download
memory/228-18-0x00000000728C0000-0x0000000073B14000-memory.dmp

Filesize
18.3MB

Download
memory/228-19-0x0000000076F61000-0x0000000077081000-memory.dmp

Filesize
1.1MB

Download
memory/4736-10-0x0000000004A20000-0x00000000058DE000-memory.dmp

Filesize
14.7MB

Download
memory/4736-11-0x0000000076F61000-0x0000000077081000-memory.dmp

Filesize
1.1MB

Download
memory/4736-12-0x0000000073DC5000-0x0000000073DC6000-memory.dmp

Filesize
4KB

Download
memory/4736-13-0x0000000004A20000-0x00000000058DE000-memory.dmp

Filesize
14.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads