guloader | f392bfa146ad86308fa464a9505708645f99618d54483cbc6b746b656f26a3fb

Analysis

max time kernel
10s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-11-2024 03:31

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General

Target

f392bfa146ad86308fa464a9505708645f99618d54483cbc6b746b656f26a3fb.exe
Size

810KB
MD5

f7fc33c3bcded454047a6bfaf99f1452
SHA1

a23a2448f373a4319fc0722b72595815d27c62c6
SHA256

f392bfa146ad86308fa464a9505708645f99618d54483cbc6b746b656f26a3fb
SHA512

0211b32321c50653fbf67190cd24455d997016f7cc9fe7e86457dfeda647ba326c2e0c2fa5d352a98ef4ec82724cd7ab50dc9988cb7e354f99623e0aa6740d29
SSDEEP

24576:pG+yftcZ0DbBTVsVQ7LE8oy9jRKta3uja581Cj:wPcZ0BuO7L7o/a5

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
2992	f392bfa146ad86308fa464a9505708645f99618d54483cbc6b746b656f26a3fb.exe
2992	f392bfa146ad86308fa464a9505708645f99618d54483cbc6b746b656f26a3fb.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\customization.rom	f392bfa146ad86308fa464a9505708645f99618d54483cbc6b746b656f26a3fb.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\primy.ini	f392bfa146ad86308fa464a9505708645f99618d54483cbc6b746b656f26a3fb.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3896	4972	WerFault.exe	96

System Location Discovery: System Language Discovery 1 TTPs 1 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	f392bfa146ad86308fa464a9505708645f99618d54483cbc6b746b656f26a3fb.exe

C:\Users\Admin\AppData\Local\Temp\f392bfa146ad86308fa464a9505708645f99618d54483cbc6b746b656f26a3fb.exe
"C:\Users\Admin\AppData\Local\Temp\f392bfa146ad86308fa464a9505708645f99618d54483cbc6b746b656f26a3fb.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
PID:2992
- C:\Users\Admin\AppData\Local\Temp\f392bfa146ad86308fa464a9505708645f99618d54483cbc6b746b656f26a3fb.exe
  "C:\Users\Admin\AppData\Local\Temp\f392bfa146ad86308fa464a9505708645f99618d54483cbc6b746b656f26a3fb.exe"
  2⤵
  PID:4972
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4972 -s 1068
    3⤵
    - Program crash
    PID:3896

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4972 -ip 4972
1⤵
PID:672

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsx23EF.tmp\System.dll

Filesize
12KB

MD5
192639861e3dc2dc5c08bb8f8c7260d5

SHA1
58d30e460609e22fa0098bc27d928b689ef9af78

SHA256
23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6

SHA512
6e573d8b2ef6ed719e271fd0b2fd9cd451f61fc9a9459330108d6d7a65a0f64016303318cad787aa1d5334ba670d8f1c7c13074e1be550b4a316963ecc465cdc

Download Submit
C:\Windows\Resources\primy.ini

Filesize
33B

MD5
76d9175a3db7407eb0bfc3c07ddcd9d2

SHA1
72071127e9a44935cb02650ed715ccaf6a8f8418

SHA256
1f7119996dd17af05bf05e497104715bbbc3909676afa4329fbd59502be1a1a5

SHA512
5032dab71e70a4bd1dad2f5cf9380e0097be7993bc46886fed6e4bdd8781f2b10d31338d90d0dc5804665bda2cbfe93f1172250e1a8ab7c9118baf9f156e3c69

Download Submit
memory/2992-23237-0x0000000002F20000-0x0000000003CD5000-memory.dmp

Filesize
13.7MB

Download
memory/2992-23238-0x0000000077DE1000-0x0000000077F01000-memory.dmp

Filesize
1.1MB

Download
memory/2992-23239-0x0000000002F20000-0x0000000003CD5000-memory.dmp

Filesize
13.7MB

Download
memory/4972-23243-0x0000000077E85000-0x0000000077E86000-memory.dmp

Filesize
4KB

Download
memory/4972-23250-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4972-23242-0x0000000077E68000-0x0000000077E69000-memory.dmp

Filesize
4KB

Download
memory/4972-23240-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4972-23247-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4972-23248-0x0000000001660000-0x0000000002415000-memory.dmp

Filesize
13.7MB

Download
memory/4972-23249-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/4972-23241-0x0000000001660000-0x0000000002415000-memory.dmp

Filesize
13.7MB

Download
memory/4972-23251-0x0000000077DE1000-0x0000000077F01000-memory.dmp

Filesize
1.1MB

Download
memory/4972-23252-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4972-23253-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/4972-23254-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4972-23255-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4972-23257-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download