guloader | 2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47

General

Target

2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe
Size

354KB
MD5

20eeb332c66557d6115a6874b6716aca
SHA1

19628f536fb087bdd70233884bc2a77a1b6b0e22
SHA256

2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47
SHA512

cee82bb4339094827ce61ef1c94260cb17d0b0ac46ec9d82b34639a9e4c9e9ca7e9ac312e7a021e574d7b3feebc94767609700308dd0cd8b72735a675ab01891
SSDEEP

6144:tNDlOlZOvRQmfszRZBdhOSmhhyDRXR0OjN5c/9WG3ktHhpBnyv+bx2MTxrLM37VQ:tsZOv09dhOSmCVhjg/9WG3QBPyv+9Zt1

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	2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe

Loads dropped DLL 1 IoCs

pid	Process
2064	2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2064	2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe
3228	2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2064 set thread context of 3228	2064	2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe	93

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	2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2064	2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2064 wrote to memory of 3228	2064	2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe	93
PID 2064 wrote to memory of 3228	2064	2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe	93
PID 2064 wrote to memory of 3228	2064	2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe	93
PID 2064 wrote to memory of 3228	2064	2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe	93
PID 2064 wrote to memory of 3228	2064	2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe	93

C:\Users\Admin\AppData\Local\Temp\2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe
"C:\Users\Admin\AppData\Local\Temp\2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.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:2064
- C:\Users\Admin\AppData\Local\Temp\2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe
  "C:\Users\Admin\AppData\Local\Temp\2791f889590f7e4f9ba357857f6389d23a2dd2eeac00d04aef3893f8f0effe47.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:3228

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\nsaA0C5.tmp\System.dll

Filesize
12KB

MD5
8cf2ac271d7679b1d68eefc1ae0c5618

SHA1
7cc1caaa747ee16dc894a600a4256f64fa65a9b8

SHA256
6950991102462d84fdc0e3b0ae30c95af8c192f77ce3d78e8d54e6b22f7c09ba

SHA512
ce828fb9ecd7655cc4c974f78f209d3326ba71ced60171a45a437fc3fff3bd0d69a0997adaca29265c7b5419bdea2b17f8cc8ceae1b8ce6b22b7ed9120bb5ad3

Download Submit
memory/2064-10-0x0000000004A10000-0x00000000058CE000-memory.dmp

Filesize
14.7MB

Download
memory/2064-11-0x0000000076F71000-0x0000000077091000-memory.dmp

Filesize
1.1MB

Download
memory/2064-12-0x0000000073DD5000-0x0000000073DD6000-memory.dmp

Filesize
4KB

Download
memory/2064-13-0x0000000004A10000-0x00000000058CE000-memory.dmp

Filesize
14.7MB

Download
memory/3228-14-0x0000000000450000-0x000000000130E000-memory.dmp

Filesize
14.7MB

Download
memory/3228-15-0x0000000076FF8000-0x0000000076FF9000-memory.dmp

Filesize
4KB

Download
memory/3228-16-0x0000000077015000-0x0000000077016000-memory.dmp

Filesize
4KB

Download
memory/3228-17-0x0000000000450000-0x000000000130E000-memory.dmp

Filesize
14.7MB

Download
memory/3228-18-0x00000000728D0000-0x0000000073B24000-memory.dmp

Filesize
18.3MB

Download
memory/3228-19-0x0000000076F71000-0x0000000077091000-memory.dmp

Filesize
1.1MB

Download

Analysis

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