guloader | 28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece

General

Target

28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe
Size

139KB
MD5

9b0d831c2f8640ba99b167a8198cc6a8
SHA1

0dbd78d7572a27d49bba5e458fd314c7e2405d48
SHA256

28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece
SHA512

266a31d3af5ec80ed528a7e584c46ab6f013c148203da75bdeee0bd2fa7242152614700049f090f830774c7bcf54dc5738b4ec0657c879f9a9f6ab7244f84bd5

Score

10^/10

guloader 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:

28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe

Loads dropped DLL 1 IoCs

Processes:

28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe

pid process

4348 28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe

pid	process
4348	28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe
3716	28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe

description	pid	process	target process
PID 4348 set thread context of 3716	4348	28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe	28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.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:

28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe

pid process

4348 28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe

description	pid	process	target process
PID 4348 wrote to memory of 3716	4348	28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe	28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe
PID 4348 wrote to memory of 3716	4348	28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe	28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe
PID 4348 wrote to memory of 3716	4348	28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe	28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe
PID 4348 wrote to memory of 3716	4348	28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe	28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe

C:\Users\Admin\AppData\Local\Temp\28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe
"C:\Users\Admin\AppData\Local\Temp\28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4348

C:\Users\Admin\AppData\Local\Temp\28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe
"C:\Users\Admin\AppData\Local\Temp\28106556ae6c11dd40bcdbc70a846eeb898637559c1b5e41447d1d80c266eece.exe"
2⤵
- Checks QEMU agent file
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:3716

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsfC78C.tmp\System.dll
Filesize
12KB

MD5
cff85c549d536f651d4fb8387f1976f2

SHA1
d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

SHA256
8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

SHA512
531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

Download Submit
memory/3716-134-0x0000000000000000-mapping.dmp

Download
memory/3716-136-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3716-137-0x0000000001660000-0x0000000001760000-memory.dmp

Filesize
1024KB

Download
memory/3716-138-0x00007FF8B4050000-0x00007FF8B4245000-memory.dmp

Filesize
2.0MB

Download
memory/3716-139-0x0000000077060000-0x0000000077203000-memory.dmp

Filesize
1.6MB

Download
memory/4348-131-0x0000000004AB0000-0x0000000004BC7000-memory.dmp

Filesize
1.1MB

Download
memory/4348-132-0x00007FF8B4050000-0x00007FF8B4245000-memory.dmp

Filesize
2.0MB

Download
memory/4348-133-0x0000000077060000-0x0000000077203000-memory.dmp

Filesize
1.6MB

Download
memory/4348-135-0x0000000077060000-0x0000000077203000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads