guloader | e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7

General

Target

e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe
Size

861KB
MD5

61518cfded3109fac04ee916ab275c26
SHA1

c624a4ee78183d82fb8264f74953d32ddcae5481
SHA256

e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7
SHA512

478737a68a76e03b10e477a47115eb643e9c7242e5a5d7ef0c635060cb0318fd185c6be59793ba66057f811d6f623c68daabd5dfddcc8c3d4dc4d9b8be7096af
SSDEEP

24576:yiGFaq43NvC7kHJTPrbG4ujTrlq8e+xfJ/QOeaq:yiGFu3Nv3HJTkdde+tJ/qaq

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 1 IoCs

pid	Process
3948	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe

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

Web Service

T1102

flow	ioc
22	drive.google.com
23	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3948	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe
4988	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3948 set thread context of 4988	3948	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe	88

Drops file in Windows directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\storsejlenes\blackweed.hor	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe
File opened for modification	C:\Windows\Arder.lnk	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe
File created	C:\Windows\Arder.lnk	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe
File opened for modification	C:\Windows\resources\0409\figenkaktusses\Ea40.ini	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe
File opened for modification	C:\Windows\Fonts\heraclitic.Wom	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.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	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3948	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3948 wrote to memory of 4988	3948	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe	88
PID 3948 wrote to memory of 4988	3948	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe	88
PID 3948 wrote to memory of 4988	3948	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe	88
PID 3948 wrote to memory of 4988	3948	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe	88
PID 3948 wrote to memory of 4988	3948	e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe	88

C:\Users\Admin\AppData\Local\Temp\e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe
"C:\Users\Admin\AppData\Local\Temp\e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe"
1⤵
- Loads dropped DLL
- 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:3948
- C:\Users\Admin\AppData\Local\Temp\e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe
  "C:\Users\Admin\AppData\Local\Temp\e67d5a5be1e0f1033957b79737340afe9889998f6c2db786144b415ddf202ee7.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:4988

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\AppData\Local\Temp\nsi7521.tmp\System.dll

Filesize
11KB

MD5
34442e1e0c2870341df55e1b7b3cccdc

SHA1
99b2fa21aead4b6ccd8ff2f6d3d3453a51d9c70c

SHA256
269d232712c86983336badb40b9e55e80052d8389ed095ebf9214964d43b6bb1

SHA512
4a8c57fb12997438b488b862f3fc9dc0f236e07bb47b2bce6053dcb03ac7ad171842f02ac749f02dda4719c681d186330524cd2953d33cb50854844e74b33d51

Download Submit
C:\Windows\Arder.lnk

Filesize
722B

MD5
77cfdd8ecc72742c11f8232be8aeeea8

SHA1
4e8d47e77da50524d7fca9b1af3eabd727676bfc

SHA256
c5049fc02d6a4572756ca526a89be896434c3f2f61a4aaf7179fffbff907eca5

SHA512
1ee0a0c75b439bbb4216874758954be1545ccede31000da478f55a756bc42d6f361c2cb9cf6b3a4fa264641a450b3f1d408986fe622ead177d8504196ed16117

Download Submit
memory/3948-307-0x00000000029B0000-0x0000000004667000-memory.dmp

Filesize
28.7MB

Download
memory/3948-279-0x00000000029B0000-0x0000000004667000-memory.dmp

Filesize
28.7MB

Download
memory/3948-280-0x0000000076EF1000-0x0000000077011000-memory.dmp

Filesize
1.1MB

Download
memory/3948-281-0x00000000029B0000-0x0000000004667000-memory.dmp

Filesize
28.7MB

Download
memory/3948-282-0x0000000074394000-0x0000000074395000-memory.dmp

Filesize
4KB

Download
memory/4988-283-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4988-285-0x0000000076F78000-0x0000000076F79000-memory.dmp

Filesize
4KB

Download
memory/4988-286-0x0000000076F95000-0x0000000076F96000-memory.dmp

Filesize
4KB

Download
memory/4988-299-0x0000000001660000-0x0000000003317000-memory.dmp

Filesize
28.7MB

Download
memory/4988-300-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4988-301-0x0000000076EF1000-0x0000000077011000-memory.dmp

Filesize
1.1MB

Download
memory/4988-284-0x0000000001660000-0x0000000003317000-memory.dmp

Filesize
28.7MB

Download

Analysis

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