guloader | 850f227ef098450656a0704b5507caba6bd1128de78ffc7ac037a4801716b497

Analysis

max time kernel
146s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
04/02/2025, 08:49

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General

Target

Bakir#.exe
Size

641KB
MD5

b973b8507af79f55cc863a7a592a41bd
SHA1

d53144ad185aa5587e674a459c782b508b8480fb
SHA256

1c13af8c86d902c0479b21327655caa1be826ac6129f03e61e093d6ec39b0fbe
SHA512

26bd2b1fd356a57919c7daae366bcac5091a56969a42295507e96bcd23ec208941952b94f45d2f20957baa3d23ca4c363b96d5adf93fe3771caff1a363846cd4
SSDEEP

6144:amOPe6H2QcxV+0M7dCy6WeZMnLqJTo+uMJXW30TtbLz3ZST70mw21NKl1+B/nSGc:WA+0MhCyteZMnGJ1uMJm30Jbn291YLWc

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 12 IoCs

pid	Process
4360	Bakir#.exe
4360	Bakir#.exe
4360	Bakir#.exe
4360	Bakir#.exe
4360	Bakir#.exe
4360	Bakir#.exe
4360	Bakir#.exe
4360	Bakir#.exe
4360	Bakir#.exe
4360	Bakir#.exe
4360	Bakir#.exe
4360	Bakir#.exe

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

Web Service

T1102

flow	ioc
33	drive.google.com
32	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4360	Bakir#.exe
2808	Bakir#.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4360 set thread context of 2808	4360	Bakir#.exe	89

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	Bakir#.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Bakir#.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4360	Bakir#.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4360 wrote to memory of 2808	4360	Bakir#.exe	89
PID 4360 wrote to memory of 2808	4360	Bakir#.exe	89
PID 4360 wrote to memory of 2808	4360	Bakir#.exe	89
PID 4360 wrote to memory of 2808	4360	Bakir#.exe	89
PID 4360 wrote to memory of 2808	4360	Bakir#.exe	89

C:\Users\Admin\AppData\Local\Temp\Bakir#.exe
"C:\Users\Admin\AppData\Local\Temp\Bakir#.exe"
1⤵
- 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:4360
- C:\Users\Admin\AppData\Local\Temp\Bakir#.exe
  "C:\Users\Admin\AppData\Local\Temp\Bakir#.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2808

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

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nse90D7.tmp\AdvSplash.dll

Filesize
6KB

MD5
e8b67a37fb41d54a7eda453309d45d97

SHA1
96be9bf7a988d9cea06150d57cd1de19f1fec19e

SHA256
2ad232bccf4ca06cf13475af87b510c5788aa790785fd50509be483afc0e0bcf

SHA512
20effae18eebb2df90d3186a281fa9233a97998f226f7adead0784fbc787feee419973962f8369d8822c1bbcdfb6e7948d9ca6086c9cf90190c8ab3ec97f4c38

Download Submit
C:\Users\Admin\AppData\Local\Temp\nse90D7.tmp\Banner.dll

Filesize
4KB

MD5
0d5428f7920274caedfa8f2ae980e196

SHA1
ce2ca2381a4b9ed9f06f6af5a183a840de290c3f

SHA256
4083bef584ad6793b3d57e3e3f764a31afac876412df65c5da5afee76bbd1e10

SHA512
78419752f3e6579f7caf1f9bab70a46ac2b0a7c5f08eb8604e927baea611c182133ce8d58929a059f22e6c2befb5ff0c24ee6500d0708bc884a65e395ea7c4cf

Download Submit
C:\Users\Admin\AppData\Local\Temp\nse90D7.tmp\LangDLL.dll

Filesize
5KB

MD5
376c1b784a3cca9d10ba4ca5d8cb55d2

SHA1
ad12f8ebab5b4b58eb7d5368469e82e2442b089f

SHA256
5bee24fef5c0f643adc7ee02ccb6e80a72a4eb30d9d326023ac03f0ffbc4e624

SHA512
6f02f0d878c228de114dee6b0df85152745b43893a252b2e9c309ba943ea56ab1ee678e42d9b0a89162e2bda627d396c2933c02e1c42d0169ac6e05ff3af4bbb

Download Submit
C:\Users\Admin\AppData\Local\Temp\nse90D7.tmp\System.dll

Filesize
11KB

MD5
8b3830b9dbf87f84ddd3b26645fed3a0

SHA1
223bef1f19e644a610a0877d01eadc9e28299509

SHA256
f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37

SHA512
d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

Download Submit
memory/2808-52-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2808-53-0x0000000001660000-0x0000000003BE4000-memory.dmp

Filesize
37.5MB

Download
memory/2808-66-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2808-67-0x0000000001660000-0x0000000003BE4000-memory.dmp

Filesize
37.5MB

Download
memory/4360-48-0x0000000004A20000-0x0000000006FA4000-memory.dmp

Filesize
37.5MB

Download
memory/4360-49-0x0000000077B11000-0x0000000077C31000-memory.dmp

Filesize
1.1MB

Download
memory/4360-50-0x0000000004A20000-0x0000000006FA4000-memory.dmp

Filesize
37.5MB

Download
memory/4360-51-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download