guloader | 457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13

General

Target

457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe
Size

707KB
MD5

eaeb565ce0d6ae206e483e41494076c1
SHA1

d7fa7da74017ab6f376d13a87203115be32d373c
SHA256

457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13
SHA512

280360bb5d860051a7c9c7c9f432358d6d401aca2780acb835bb76a792ecbdda9df36051dd6f9d0990159c0090c079a3565ec19920ea0361fec95c6367939554
SSDEEP

12288:d35ol8MJEBhQRtZZbhhLSbWJgU8UFJ6UibZP9/I7TAWWtQnmD:d3kJEBORt7b3Oa2Udi9P9yTB0QnmD

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

Processes:

457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

pid	process
2144	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe
2144	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

pid	process
2144	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe
432	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

description	pid	process	target process
PID 2144 set thread context of 432	2144	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

Drops file in Program Files directory 1 IoCs

Processes:

457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Common Files\nomarch\gratiales.ini	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

Drops file in Windows directory 2 IoCs

Processes:

457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

description	ioc	process
File created	C:\Windows\Fonts\Gullis.lnk	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe
File opened for modification	C:\Windows\Fonts\Gullis.lnk	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.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

Processes:

457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

pid process

2144 457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

description	pid	process	target process
PID 2144 wrote to memory of 432	2144	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe
PID 2144 wrote to memory of 432	2144	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe
PID 2144 wrote to memory of 432	2144	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe
PID 2144 wrote to memory of 432	2144	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe
PID 2144 wrote to memory of 432	2144	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe	457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe

C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe
"C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.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:2144
- C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe
  "C:\Users\Admin\AppData\Local\Temp\457920271c702327ebd0b91221bab5c4c953f09a7b2a32166ebb266ff5d7bf13.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:432

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\nszB680.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
C:\Windows\Fonts\Gullis.lnk

Filesize
1KB

MD5
6f44cef252510da2d224ceb73e73a97f

SHA1
19ced1cad25585e37185b65743a1ef9473063f3d

SHA256
a36473b51c20dcd19e2b09239b2e9065bd1d861e0859f4f9a01a0fcc087793cf

SHA512
1be4bccbcf35fe8faa04b418fb778598946083dcb89fc77b657ef2581e28145faba013623b0d8227db63abad592d4fc9ed3f19aea9b49ebaf56e9a119d285e08

Download Submit
memory/432-21-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/432-22-0x0000000001660000-0x000000000454A000-memory.dmp

Filesize
46.9MB

Download
memory/432-23-0x0000000001660000-0x000000000454A000-memory.dmp

Filesize
46.9MB

Download
memory/432-24-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2144-18-0x0000000002AC0000-0x00000000059AA000-memory.dmp

Filesize
46.9MB

Download
memory/2144-19-0x0000000076FF1000-0x0000000077111000-memory.dmp

Filesize
1.1MB

Download
memory/2144-20-0x0000000002AC0000-0x00000000059AA000-memory.dmp

Filesize
46.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads