guloader | 8c902fc0f78ef5ae8375f02f7b48020972ea2b22fb2eb01398ac2517074ccc52

Analysis

max time kernel
142s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
30-09-2024 16:59

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General

Target

WireTransferInvoicePaymentRef89507.exe
Size

532KB
MD5

861734e77cbfd9b0663419e053b8f100
SHA1

b7f908d8cf86cc9e20a51d9020d2b6860c8e4433
SHA256

8c902fc0f78ef5ae8375f02f7b48020972ea2b22fb2eb01398ac2517074ccc52
SHA512

0467e62b8781748d49ed33595fc15e8ef0ff4a01e62ed111838158f1cfeb3a55007573e8b36e38606d00359038dc1d4ca3fb71ba9816a9e6ab31e53884c67ce1
SSDEEP

12288:zBbNp7y7wNaoecSRZfiRYiWvCwr5ym2FV:9y7wgBcSDKi9qW5y

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
1304	WireTransferInvoicePaymentRef89507.exe
1304	WireTransferInvoicePaymentRef89507.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1304	WireTransferInvoicePaymentRef89507.exe
1380	WireTransferInvoicePaymentRef89507.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1304 set thread context of 1380	1304	WireTransferInvoicePaymentRef89507.exe	86

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\Mancus.phi	WireTransferInvoicePaymentRef89507.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	WireTransferInvoicePaymentRef89507.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WireTransferInvoicePaymentRef89507.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1304	WireTransferInvoicePaymentRef89507.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1304 wrote to memory of 1380	1304	WireTransferInvoicePaymentRef89507.exe	86
PID 1304 wrote to memory of 1380	1304	WireTransferInvoicePaymentRef89507.exe	86
PID 1304 wrote to memory of 1380	1304	WireTransferInvoicePaymentRef89507.exe	86
PID 1304 wrote to memory of 1380	1304	WireTransferInvoicePaymentRef89507.exe	86
PID 1304 wrote to memory of 1380	1304	WireTransferInvoicePaymentRef89507.exe	86

C:\Users\Admin\AppData\Local\Temp\WireTransferInvoicePaymentRef89507.exe
"C:\Users\Admin\AppData\Local\Temp\WireTransferInvoicePaymentRef89507.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:1304
- C:\Users\Admin\AppData\Local\Temp\WireTransferInvoicePaymentRef89507.exe
  "C:\Users\Admin\AppData\Local\Temp\WireTransferInvoicePaymentRef89507.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:1380

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsy757F.tmp\System.dll

Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
memory/1304-13-0x0000000004B00000-0x0000000006657000-memory.dmp

Filesize
27.3MB

Download
memory/1304-14-0x0000000077B71000-0x0000000077C91000-memory.dmp

Filesize
1.1MB

Download
memory/1304-15-0x0000000004B00000-0x0000000006657000-memory.dmp

Filesize
27.3MB

Download
memory/1304-17-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/1304-28-0x0000000004B00000-0x0000000006657000-memory.dmp

Filesize
27.3MB

Download
memory/1380-16-0x00000000016D0000-0x0000000003227000-memory.dmp

Filesize
27.3MB

Download
memory/1380-18-0x0000000077BF8000-0x0000000077BF9000-memory.dmp

Filesize
4KB

Download
memory/1380-19-0x00000000016D0000-0x0000000003227000-memory.dmp

Filesize
27.3MB

Download
memory/1380-20-0x0000000077C15000-0x0000000077C16000-memory.dmp

Filesize
4KB

Download
memory/1380-21-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/1380-22-0x0000000077B71000-0x0000000077C91000-memory.dmp

Filesize
1.1MB

Download