guloader | 94ba462fd78d3561b0a7472c6d96eb62bd902b68a49c7ca0cb5b5a6c03796a8c

General

Target

factura 563423.exe
Size

901KB
MD5

6cb35cad38c80bbb552c99caf75f9371
SHA1

f1dcc7d9805738aaf1f30b32383674ea30706269
SHA256

057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf
SHA512

638594b7228a8e747c34f1ab7916774feaff1ce58e875e64bb28cc6742472a305c5aa06e709ec708aad990d9e78ce828509af8a575b3fe62082699de1bb81734
SSDEEP

12288:TSlZI9dcNnPmsS7wkJW7DQFeh2FCCMntz6I8128TsXULDh+gDBf6j4Ydcv+l:2lTnpc/J2d2UVf+DLD1BbYGW

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 2 IoCs

pid	Process
2620	factura 563423.exe
2620	factura 563423.exe

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

Web Service

T1102

flow	ioc
3	drive.google.com
5	drive.google.com

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\oecus\svante.Eft	factura 563423.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1640	factura 563423.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2620	factura 563423.exe
1640	factura 563423.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2620 set thread context of 1640	2620	factura 563423.exe	32

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\sankthansaftnerne\clodpoll.saf	factura 563423.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	factura 563423.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	factura 563423.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2620	factura 563423.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2620 wrote to memory of 1640	2620	factura 563423.exe	32
PID 2620 wrote to memory of 1640	2620	factura 563423.exe	32
PID 2620 wrote to memory of 1640	2620	factura 563423.exe	32
PID 2620 wrote to memory of 1640	2620	factura 563423.exe	32
PID 2620 wrote to memory of 1640	2620	factura 563423.exe	32
PID 2620 wrote to memory of 1640	2620	factura 563423.exe	32

C:\Users\Admin\AppData\Local\Temp\factura 563423.exe
"C:\Users\Admin\AppData\Local\Temp\factura 563423.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2620
- C:\Users\Admin\AppData\Local\Temp\factura 563423.exe
  "C:\Users\Admin\AppData\Local\Temp\factura 563423.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:1640

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

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\Desktop\peripheries.lnk

Filesize
856B

MD5
35051d8132b702d06ae92d716daa8325

SHA1
d780139bce873b9cea9f3d067d03dd0e2e43dc28

SHA256
8913c70de6fb9f789eb8c7c214d1ec534b2463173d634b57bb730fb931d04839

SHA512
afa2bc9a7b6aef6d9d10d94bf2530bf17e5681b863ba89e73a19a6181a569d2711b5cabf9bb7efae57a73aab9c7e1d43277a752a7637aa4477455d5de14f3aa6

Download Submit
C:\Users\Admin\Desktop\peripheries.lnk

Filesize
826B

MD5
1b5dba842f7f0d5f0a1c9fdfb670bfa8

SHA1
9dd9bf5e0eb756ab8dbdec0869b6b156700fc5bd

SHA256
3cdd4d8bb60d898851735427e4ea085161c09194da3dec593c1868cf59dbcebd

SHA512
f7bb2b820bfb352e769dc5991c13b769cc57d5e7c039cfccc223b90cc3c4068b70606ed210be80cb3441061c6c417bea788c03fb2cfc5ac3c5db7c6f741a59de

Download Submit
\Users\Admin\AppData\Local\Temp\nsuEFBD.tmp\System.dll

Filesize
11KB

MD5
cf85183b87314359488b850f9e97a698

SHA1
6b6c790037eec7ebea4d05590359cb4473f19aea

SHA256
3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac

SHA512
fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

Download Submit
memory/1640-24651-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1640-24676-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1640-24677-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1640-24675-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1640-24653-0x0000000077380000-0x0000000077529000-memory.dmp

Filesize
1.7MB

Download
memory/1640-24648-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1640-24650-0x0000000077380000-0x0000000077529000-memory.dmp

Filesize
1.7MB

Download
memory/2620-24644-0x0000000003040000-0x00000000048AB000-memory.dmp

Filesize
24.4MB

Download
memory/2620-24649-0x0000000003040000-0x00000000048AB000-memory.dmp

Filesize
24.4MB

Download
memory/2620-24647-0x0000000077380000-0x0000000077529000-memory.dmp

Filesize
1.7MB

Download
memory/2620-24646-0x0000000077381000-0x0000000077482000-memory.dmp

Filesize
1.0MB

Download
memory/2620-24645-0x0000000003040000-0x00000000048AB000-memory.dmp

Filesize
24.4MB

Download

Analysis

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