guloader | 07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b

General

Target

07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe
Size

524KB
MD5

5516decfc8b4ca782e66470f274e7850
SHA1

f11499f5fa5134f61a885f9805bb844fbd39fef0
SHA256

07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b
SHA512

3fba54ce3e7b5d05999a72593718357c60a8f677d922f010f9a18b191732ac6c102b7db0e9df65cc178a195763c57a08672af5efecfd705929ddc6a68d2d0762
SSDEEP

12288:E5INMIx1otFZEFiZ71EJNnjtGnUrDvJL9MI8UXBuuO7:8IK+obG0+7RGnIB9MSLO7

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 7 IoCs

pid	Process
4852	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe
4852	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe
4852	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe
4852	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe
4852	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe
4852	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe
4852	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4852	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe
2280	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4852 set thread context of 2280	4852	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe	92

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\fiskestimernes\Kjv.ini	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.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	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4852	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4852 wrote to memory of 2280	4852	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe	92
PID 4852 wrote to memory of 2280	4852	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe	92
PID 4852 wrote to memory of 2280	4852	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe	92
PID 4852 wrote to memory of 2280	4852	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe	92
PID 4852 wrote to memory of 2280	4852	07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe	92

C:\Users\Admin\AppData\Local\Temp\07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe
"C:\Users\Admin\AppData\Local\Temp\07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.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:4852
- C:\Users\Admin\AppData\Local\Temp\07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe
  "C:\Users\Admin\AppData\Local\Temp\07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2280

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\nss72EF.tmp\LangDLL.dll

Filesize
5KB

MD5
adad756e278127e9d31eb33d6e053740

SHA1
71943b9697441152b131a21075f5463ab40ca6ed

SHA256
d1fa47d8485b212eccd266fe5fc2be9750c4b843da78bddd2349ab58ef138b32

SHA512
047fa57a44ed2c2f214be68af1b2740591e4b508a4ca9c2eed7f84b3bb5b6f0a7c1d584e6790cc231dfbb6a23a96f826079ed5b0d9d961e95397ffc345cb7a5c

Download Submit
C:\Users\Admin\AppData\Local\Temp\nss72EF.tmp\System.dll

Filesize
11KB

MD5
34442e1e0c2870341df55e1b7b3cccdc

SHA1
99b2fa21aead4b6ccd8ff2f6d3d3453a51d9c70c

SHA256
269d232712c86983336badb40b9e55e80052d8389ed095ebf9214964d43b6bb1

SHA512
4a8c57fb12997438b488b862f3fc9dc0f236e07bb47b2bce6053dcb03ac7ad171842f02ac749f02dda4719c681d186330524cd2953d33cb50854844e74b33d51

Download Submit
memory/2280-39-0x00000000016D0000-0x0000000002981000-memory.dmp

Filesize
18.7MB

Download
memory/2280-36-0x00000000016D0000-0x0000000002981000-memory.dmp

Filesize
18.7MB

Download
memory/2280-37-0x00000000778B8000-0x00000000778B9000-memory.dmp

Filesize
4KB

Download
memory/2280-38-0x00000000778D5000-0x00000000778D6000-memory.dmp

Filesize
4KB

Download
memory/2280-40-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2280-41-0x0000000077831000-0x0000000077951000-memory.dmp

Filesize
1.1MB

Download
memory/4852-33-0x0000000077831000-0x0000000077951000-memory.dmp

Filesize
1.1MB

Download
memory/4852-34-0x0000000004A10000-0x0000000005CC1000-memory.dmp

Filesize
18.7MB

Download
memory/4852-35-0x0000000074484000-0x0000000074485000-memory.dmp

Filesize
4KB

Download
memory/4852-32-0x0000000004A10000-0x0000000005CC1000-memory.dmp

Filesize
18.7MB

Download
memory/4852-47-0x0000000004A10000-0x0000000005CC1000-memory.dmp

Filesize
18.7MB

Download

Analysis

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