guloader | 643a505fefdbf1f0fa9915550a75b2b739aba1683858f92f332c9585c838690d

General

Target

rpedido-002297.exe
Size

555KB
MD5

e7b674773e7c72426b2bcc90a9c1e299
SHA1

174323edc68682341dd312095cefaa2c6680de24
SHA256

643a505fefdbf1f0fa9915550a75b2b739aba1683858f92f332c9585c838690d
SHA512

88775e285072fd73cc42eb162b30f81197830befe7751529b4dc3a4d021571a17b90323805236149683097850916cc534205467ed0f584f67cb79b029f771ddb
SSDEEP

12288:TaIq2S5iC8dHsPeOXHO80cE6PU2dLkbdG0A:WrJ8MLXHO8ZE6PU4IdGb

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
2376	rpedido-002297.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
1292	rpedido-002297.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2376	rpedido-002297.exe
1292	rpedido-002297.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2376 set thread context of 1292	2376	rpedido-002297.exe	31

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	rpedido-002297.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rpedido-002297.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1292	rpedido-002297.exe
1292	rpedido-002297.exe
1292	rpedido-002297.exe
1292	rpedido-002297.exe
1292	rpedido-002297.exe
1292	rpedido-002297.exe
1292	rpedido-002297.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2376	rpedido-002297.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2376 wrote to memory of 1292	2376	rpedido-002297.exe	31
PID 2376 wrote to memory of 1292	2376	rpedido-002297.exe	31
PID 2376 wrote to memory of 1292	2376	rpedido-002297.exe	31
PID 2376 wrote to memory of 1292	2376	rpedido-002297.exe	31
PID 2376 wrote to memory of 1292	2376	rpedido-002297.exe	31
PID 2376 wrote to memory of 1292	2376	rpedido-002297.exe	31

C:\Users\Admin\AppData\Local\Temp\rpedido-002297.exe
"C:\Users\Admin\AppData\Local\Temp\rpedido-002297.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2376
- C:\Users\Admin\AppData\Local\Temp\rpedido-002297.exe
  "C:\Users\Admin\AppData\Local\Temp\rpedido-002297.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:1292

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\Roaming\Microsoft\Windows\Templates\Gaulin.ini

Filesize
37B

MD5
cfda8e6aade7958f94a959bdb29cb209

SHA1
59c459e105a7af33d13a365f735e3cb7b8e5ddb0

SHA256
b4543e8ab4997934d2edc7de8a76a24b7c2ccb641212ae3b9b17fe05b71d3e87

SHA512
edfdca00667ed3a5558f7e614373f0b8393763a979154666972c659cb44e75ccd51170e4e2189043046eb4ddb8a68642bbdb6f98a0e494e76e86faaf14f993b2

Download Submit
\Users\Admin\AppData\Local\Temp\nsoD358.tmp\System.dll

Filesize
11KB

MD5
8b3830b9dbf87f84ddd3b26645fed3a0

SHA1
223bef1f19e644a610a0877d01eadc9e28299509

SHA256
f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37

SHA512
d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

Download Submit
memory/1292-307-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1292-316-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1292-310-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1292-309-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1292-283-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1292-284-0x00000000778F0000-0x0000000077A99000-memory.dmp

Filesize
1.7MB

Download
memory/1292-308-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1292-304-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1292-306-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2376-280-0x00000000778F1000-0x00000000779F2000-memory.dmp

Filesize
1.0MB

Download
memory/2376-305-0x00000000036B0000-0x00000000040C8000-memory.dmp

Filesize
10.1MB

Download
memory/2376-282-0x00000000036B0000-0x00000000040C8000-memory.dmp

Filesize
10.1MB

Download
memory/2376-281-0x00000000778F0000-0x0000000077A99000-memory.dmp

Filesize
1.7MB

Download
memory/2376-279-0x00000000036B0000-0x00000000040C8000-memory.dmp

Filesize
10.1MB

Download

Analysis

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