guloader | 25c15c9681089beffc8e40612a9b1c257cb170c08946b2ff88f15a36de7848c2

General

Target

5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe
Size

307KB
MD5

63532a519bd02c6aae21d1af04c8d91f
SHA1

9f4593a6241658698f6aa84fe2f590ccecc21f28
SHA256

5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890
SHA512

7d0dfc91e9d7f3747bbf137b1f0155a0068bbb39db4e8129f780a5e49cb9c23d3aad92c961609513c410f12207fbef41ec8dc0bf26fe2f4c9af6a93e5cf33e1b
SSDEEP

6144:E1ssjH3zJkAD54sRVruVPYQcBHy5aFKJz5thM7O8LY1gPfxVJMyF:5sjD19FCmLlKFvhM7bf/

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	5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe

Loads dropped DLL 1 IoCs

pid	Process
3904	5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3904	5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe
4688	5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3904 set thread context of 4688	3904	5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe	91

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Udsanering\Preinherit\Forgngernes\reagenten.vac	5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\Kurths\Skeers\Fjerdingers.Sal	5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3904	5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3904 wrote to memory of 4688	3904	5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe	91
PID 3904 wrote to memory of 4688	3904	5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe	91
PID 3904 wrote to memory of 4688	3904	5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe	91
PID 3904 wrote to memory of 4688	3904	5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe	91

C:\Users\Admin\AppData\Local\Temp\5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe
"C:\Users\Admin\AppData\Local\Temp\5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3904
- C:\Users\Admin\AppData\Local\Temp\5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe
  "C:\Users\Admin\AppData\Local\Temp\5dd0b3b36f6e543617bd5d1c7f45ec56406ab95d585cbcfea73a7a0877f8c890.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:4688

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\nsqE188.tmp\System.dll

Filesize
12KB

MD5
792b6f86e296d3904285b2bf67ccd7e0

SHA1
966b16f84697552747e0ddd19a4ba8ab5083af31

SHA256
c7a20bcaa0197aedddc8e4797bbb33fdf70d980f5e83c203d148121c2106d917

SHA512
97edc3410b88ca31abc0af0324258d2b59127047810947d0fb5e7e12957db34d206ffd70a0456add3a26b0546643ff0234124b08423c2c9ffe9bdec6eb210f2c

Download Submit
memory/3904-10-0x0000000002A40000-0x0000000002B60000-memory.dmp

Filesize
1.1MB

Download
memory/3904-11-0x0000000002A40000-0x0000000002B60000-memory.dmp

Filesize
1.1MB

Download
memory/3904-12-0x0000000076F51000-0x0000000077071000-memory.dmp

Filesize
1.1MB

Download
memory/3904-13-0x0000000073DB5000-0x0000000073DB6000-memory.dmp

Filesize
4KB

Download
memory/3904-26-0x0000000002A40000-0x0000000002B60000-memory.dmp

Filesize
1.1MB

Download
memory/4688-15-0x0000000001660000-0x0000000001760000-memory.dmp

Filesize
1024KB

Download
memory/4688-16-0x0000000076F51000-0x0000000077071000-memory.dmp

Filesize
1.1MB

Download
memory/4688-17-0x0000000001660000-0x0000000001760000-memory.dmp

Filesize
1024KB

Download
memory/4688-18-0x0000000076FD8000-0x0000000076FD9000-memory.dmp

Filesize
4KB

Download
memory/4688-19-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4688-20-0x0000000076F51000-0x0000000077071000-memory.dmp

Filesize
1.1MB

Download
memory/4688-14-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download

Analysis

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