guloader | e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937

General

Target

e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe
Size

872KB
MD5

f7a24870d5299a3f89dae6a25c3889a6
SHA1

5e352f6f8fa9eefb48048309daeaf985aeb64321
SHA256

e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937
SHA512

ee234cac02ed83eed3f82b1707e02c30299a81d12fb02fe119aea512629576ff1bbf160a515e0df117d3ae92fab0956c4e12d4dc2b3a2a45bc239f3e48ecb8e0
SSDEEP

24576:EiGFaq43NvCH2BLmBVfdywujTrlC6hBrlhJ/QOeal:EiGFu3Nv2Vy/dC+FlhJ/qal

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
2520	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe

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

Web Service

T1102

flow	ioc
4	drive.google.com
5	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1596	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2520	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe
1596	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2520 set thread context of 1596	2520	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe	31

Drops file in Windows directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\heraclitic.Wom	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe
File opened for modification	C:\Windows\storsejlenes\blackweed.hor	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe
File opened for modification	C:\Windows\Arder.lnk	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe
File created	C:\Windows\Arder.lnk	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe
File opened for modification	C:\Windows\resources\0409\figenkaktusses\Ea40.ini	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2692	1596	WerFault.exe	31

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	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1596	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2520	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 1596	2520	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe	31
PID 2520 wrote to memory of 1596	2520	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe	31
PID 2520 wrote to memory of 1596	2520	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe	31
PID 2520 wrote to memory of 1596	2520	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe	31
PID 2520 wrote to memory of 1596	2520	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe	31
PID 2520 wrote to memory of 1596	2520	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe	31
PID 1596 wrote to memory of 2692	1596	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe	34
PID 1596 wrote to memory of 2692	1596	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe	34
PID 1596 wrote to memory of 2692	1596	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe	34
PID 1596 wrote to memory of 2692	1596	e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe	34

C:\Users\Admin\AppData\Local\Temp\e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe
"C:\Users\Admin\AppData\Local\Temp\e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.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:2520
- C:\Users\Admin\AppData\Local\Temp\e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe
  "C:\Users\Admin\AppData\Local\Temp\e8b0ae0b538855299301ba758e7064d59a05e75ac8469156dac3cbab4b56c937.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1596
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1596 -s 68
    3⤵
    - Program crash
    PID:2692

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:\Windows\Arder.lnk

Filesize
714B

MD5
7257edefdaea4c943811bdc84cdae54d

SHA1
dfad1c16bb860d3eadb1dee332784f30e0c37752

SHA256
9ad4b914519f0f830c7ed62b2dbaefb541dc25a885d324ebdc8a5d3664008db3

SHA512
4d292c828f023b15d6858cec97e9be25153103763388dbeb5ba7c9c87cc821e8bc90eca5e276293608bd681194be0bf29e47eb83dd8216b5818b0fd2c947526e

Download Submit
\Users\Admin\AppData\Local\Temp\nst9B66.tmp\System.dll

Filesize
11KB

MD5
34442e1e0c2870341df55e1b7b3cccdc

SHA1
99b2fa21aead4b6ccd8ff2f6d3d3453a51d9c70c

SHA256
269d232712c86983336badb40b9e55e80052d8389ed095ebf9214964d43b6bb1

SHA512
4a8c57fb12997438b488b862f3fc9dc0f236e07bb47b2bce6053dcb03ac7ad171842f02ac749f02dda4719c681d186330524cd2953d33cb50854844e74b33d51

Download Submit
memory/1596-307-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1596-312-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1596-310-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1596-309-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1596-285-0x00000000775F0000-0x0000000077799000-memory.dmp

Filesize
1.7MB

Download
memory/1596-284-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1596-305-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1596-308-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2520-282-0x00000000775F0000-0x0000000077799000-memory.dmp

Filesize
1.7MB

Download
memory/2520-306-0x0000000002EC0000-0x000000000503E000-memory.dmp

Filesize
33.5MB

Download
memory/2520-283-0x0000000002EC0000-0x000000000503E000-memory.dmp

Filesize
33.5MB

Download
memory/2520-281-0x00000000775F1000-0x00000000776F2000-memory.dmp

Filesize
1.0MB

Download
memory/2520-280-0x0000000002EC0000-0x000000000503E000-memory.dmp

Filesize
33.5MB

Download

Analysis

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