guloader | f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
07-02-2025 05:58

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General

Target

f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.exe
Size

1.0MB
MD5

fd533f80090c761f06b499dd63f5cb10
SHA1

2534671af3824e6b8edcdbdf6e06789050074e0e
SHA256

f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91
SHA512

083e8e1e00c39b9e5e708f0f3149313ba46659e7503791aee5ac31deb64413c7890633c4f3e4869abcefd55880e2e2b538b1003de3f4944b6979cbe13e049508
SSDEEP

24576:+5bgDPHeGskuYMexXYvRCEOYkYRU2fNYwYtYPY:+5qPHeGh5ovRH1bqyuXOg

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
3428	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.exe
3428	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3428	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.exe
2416	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\Gundelet\gleditsia.ini	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.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	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3428	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3428 wrote to memory of 2416	3428	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.exe	100
PID 3428 wrote to memory of 2416	3428	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.exe	100
PID 3428 wrote to memory of 2416	3428	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.exe	100
PID 3428 wrote to memory of 2416	3428	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.exe	100

C:\Users\Admin\AppData\Local\Temp\f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.exe
"C:\Users\Admin\AppData\Local\Temp\f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3428
- C:\Users\Admin\AppData\Local\Temp\f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.exe
  "C:\Users\Admin\AppData\Local\Temp\f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2416

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\nsaB9DB.tmp\System.dll

Filesize
11KB

MD5
cf85183b87314359488b850f9e97a698

SHA1
6b6c790037eec7ebea4d05590359cb4473f19aea

SHA256
3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac

SHA512
fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

Download Submit
C:\Users\Admin\Quiddler\markus\superceded\ned.ini

Filesize
34KB

MD5
46d760ff5d80888a54a38d5bd968c3b9

SHA1
074ffba863941492da6fceb711fc6f6d49884d62

SHA256
89da4d13eedf0d1128752be5993608a45d8b1d3377ce852cac6938c0514f7952

SHA512
5c1429bc19c1c154a746ba09376d35293b60a4f95196db3acbbc738d4f3a65c93fc67bdcfc4d15db5485d4bf8cc7bddd8d93c150e2760c88b1bca8aef0cb27c8

Download Submit
memory/2416-33-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2416-32-0x0000000001660000-0x0000000006C2A000-memory.dmp

Filesize
85.8MB

Download
memory/2416-34-0x0000000077218000-0x0000000077219000-memory.dmp

Filesize
4KB

Download
memory/2416-35-0x0000000077235000-0x0000000077236000-memory.dmp

Filesize
4KB

Download
memory/2416-36-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2416-37-0x0000000077191000-0x00000000772B1000-memory.dmp

Filesize
1.1MB

Download
memory/3428-29-0x0000000077191000-0x00000000772B1000-memory.dmp

Filesize
1.1MB

Download
memory/3428-31-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/3428-30-0x0000000077191000-0x00000000772B1000-memory.dmp

Filesize
1.1MB

Download