guloader | db9d7fa72ddabfa9e6998ad24073c8a72f2188cf13115a4cca48a93267f35105

General

Target

PORUDZBENICA.exe
Size

820KB
MD5

5854b91e3d1ef91530f96c70c8425106
SHA1

f6739b8f7d97012d8d21f94ef0116b860b120b9c
SHA256

5fb792bb1793ff9314b4a3a4d3f8e267f9b833ae9467b42f0bd7df012de5d0f0
SHA512

1fb6e0cf17dfef6945b11fc4d5faed2a926826b64be1a76add384dc51fcd1f0c76bb8e722bcc32e2b5d0d43e807132762048e48b8fdaf42def346b53dbd685d5
SSDEEP

24576:TG+yYqTgm8Lt7VUD7LE8oy9jRKta3uja581CV:66eJKUD7L7o/aT

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Loads dropped DLL 2 IoCs

pid	Process
4060	PORUDZBENICA.exe
4060	PORUDZBENICA.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
396	PORUDZBENICA.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4060	PORUDZBENICA.exe
396	PORUDZBENICA.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4060 set thread context of 396	4060	PORUDZBENICA.exe	97

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\customization.rom	PORUDZBENICA.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\primy.ini	PORUDZBENICA.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	PORUDZBENICA.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PORUDZBENICA.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
396	PORUDZBENICA.exe
396	PORUDZBENICA.exe
396	PORUDZBENICA.exe
396	PORUDZBENICA.exe
396	PORUDZBENICA.exe
396	PORUDZBENICA.exe
396	PORUDZBENICA.exe
396	PORUDZBENICA.exe
396	PORUDZBENICA.exe
396	PORUDZBENICA.exe
396	PORUDZBENICA.exe
396	PORUDZBENICA.exe
396	PORUDZBENICA.exe
396	PORUDZBENICA.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4060	PORUDZBENICA.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4060 wrote to memory of 396	4060	PORUDZBENICA.exe	97
PID 4060 wrote to memory of 396	4060	PORUDZBENICA.exe	97
PID 4060 wrote to memory of 396	4060	PORUDZBENICA.exe	97
PID 4060 wrote to memory of 396	4060	PORUDZBENICA.exe	97
PID 4060 wrote to memory of 396	4060	PORUDZBENICA.exe	97

C:\Users\Admin\AppData\Local\Temp\PORUDZBENICA.exe
"C:\Users\Admin\AppData\Local\Temp\PORUDZBENICA.exe"
1⤵
- 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:4060
- C:\Users\Admin\AppData\Local\Temp\PORUDZBENICA.exe
  "C:\Users\Admin\AppData\Local\Temp\PORUDZBENICA.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:396

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

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\nsq9480.tmp\System.dll

Filesize
12KB

MD5
192639861e3dc2dc5c08bb8f8c7260d5

SHA1
58d30e460609e22fa0098bc27d928b689ef9af78

SHA256
23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6

SHA512
6e573d8b2ef6ed719e271fd0b2fd9cd451f61fc9a9459330108d6d7a65a0f64016303318cad787aa1d5334ba670d8f1c7c13074e1be550b4a316963ecc465cdc

Download Submit
memory/396-23252-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/396-23257-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/396-23251-0x0000000077B01000-0x0000000077C21000-memory.dmp

Filesize
1.1MB

Download
memory/396-23264-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/396-23241-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/396-23242-0x0000000001660000-0x00000000020C9000-memory.dmp

Filesize
10.4MB

Download
memory/396-23243-0x0000000077B88000-0x0000000077B89000-memory.dmp

Filesize
4KB

Download
memory/396-23244-0x0000000077BA5000-0x0000000077BA6000-memory.dmp

Filesize
4KB

Download
memory/396-23254-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/396-23249-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/396-23263-0x0000000001660000-0x00000000020C9000-memory.dmp

Filesize
10.4MB

Download
memory/396-23262-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/396-23248-0x0000000001660000-0x00000000020C9000-memory.dmp

Filesize
10.4MB

Download
memory/396-23253-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/396-23255-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/396-23256-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/396-23259-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/396-23258-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4060-23238-0x0000000077B01000-0x0000000077C21000-memory.dmp

Filesize
1.1MB

Download
memory/4060-23239-0x00000000747F5000-0x00000000747F6000-memory.dmp

Filesize
4KB

Download
memory/4060-23240-0x0000000002F20000-0x0000000003989000-memory.dmp

Filesize
10.4MB

Download
memory/4060-23237-0x0000000002F20000-0x0000000003989000-memory.dmp

Filesize
10.4MB

Download

Analysis

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