guloader | 76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be

General

Target

76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe
Size

949KB
MD5

452069cc035deac2144e5a854a69c586
SHA1

448825cc91b5d3248d9af52bfbcd9b29e5c040a5
SHA256

76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be
SHA512

1d4fd3d5f75916c46feaa959cd79e13497d5048a4907d508663de988e7d886c024e1e663e681bd490c98934c17879a419a6ba32b43c01af3e95064cb8b1a99e4
SSDEEP

24576:cJMWo7yZWAVax8G9MXQzQJIdN33UyWbRyEy1dmYEjH:UfZfVXOMkhEyWbRyNDmNjH

Score

10^/10

guloader discovery 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

description	ioc	Process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe

Loads dropped DLL 1 IoCs

pid	Process
824	76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
3	drive.google.com
6	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
824	76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe
1396	76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 824 set thread context of 1396	824	76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe	32

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	76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
824	76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 824 wrote to memory of 1396	824	76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe	32
PID 824 wrote to memory of 1396	824	76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe	32
PID 824 wrote to memory of 1396	824	76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe	32
PID 824 wrote to memory of 1396	824	76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe	32
PID 824 wrote to memory of 1396	824	76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe	32
PID 824 wrote to memory of 1396	824	76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe	32

C:\Users\Admin\AppData\Local\Temp\76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe
"C:\Users\Admin\AppData\Local\Temp\76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.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:824
- C:\Users\Admin\AppData\Local\Temp\76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe
  "C:\Users\Admin\AppData\Local\Temp\76352129fb5c6724d764d342ef0608392de3e50b8e2b6316552593cb7e5df3be.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:1396

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

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Public\Desktop\gasmesteren.lnk

Filesize
1KB

MD5
2addf0e61ce8f0d40afd7cb4d2bbe1b0

SHA1
bbe1ca25c0f3f4852c337b713c477800087d0116

SHA256
fb034b4e9655e9bfb1167e1bdec44ce73071f5d34ff39228a0888a084a623c9a

SHA512
4207d4f25f95df19937474dc03aa0643ab0c61e455820be62a9f386c632288786bff188872a64315064a4984359600a1da0ee3ee5f878363853cceb02c2603c4

Download Submit
\Users\Admin\AppData\Local\Temp\nstE265.tmp\System.dll

Filesize
12KB

MD5
dd87a973e01c5d9f8e0fcc81a0af7c7a

SHA1
c9206ced48d1e5bc648b1d0f54cccc18bf643a14

SHA256
7fb0f8d452fefaac789986b933df050f3d3e4feb8a8d9944ada995f572dcdca1

SHA512
4910b39b1a99622ac8b3c42f173bbe7035ac2f8d40c946468e7db7e2868a2da81ea94da453857f06f39957dd690c7f1ba498936a7aaa0039975e472376f92e8f

Download Submit
memory/824-285-0x0000000003EB0000-0x0000000005F8F000-memory.dmp

Filesize
32.9MB

Download
memory/824-286-0x0000000077AB1000-0x0000000077BB2000-memory.dmp

Filesize
1.0MB

Download
memory/824-287-0x0000000003EB0000-0x0000000005F8F000-memory.dmp

Filesize
32.9MB

Download
memory/824-288-0x0000000077AB0000-0x0000000077C59000-memory.dmp

Filesize
1.7MB

Download
memory/824-325-0x0000000003EB0000-0x0000000005F8F000-memory.dmp

Filesize
32.9MB

Download
memory/1396-289-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1396-290-0x0000000077AB0000-0x0000000077C59000-memory.dmp

Filesize
1.7MB

Download
memory/1396-291-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download

Analysis

Sharing