guloader | 3c74c62451d876da8642fc1b4f1e689b7b6d03aa74dd9baa0aefde62cd3c13b5

Analysis

max time kernel
148s
max time network
147s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
25/09/2024, 20:07

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General

Target

DZELTLDSZLEMEpdf.bat.exe
Size

554KB
MD5

8681ab3286a883dbfaad479b99aef9d1
SHA1

c3df94522f79f288c5178083bb3085bb61f6ce01
SHA256

3c74c62451d876da8642fc1b4f1e689b7b6d03aa74dd9baa0aefde62cd3c13b5
SHA512

9430594953d979cab8fc58dd493c8bc248cf70051093ac4c415addcf7c2c1c1c39a4c695aa89a6dcf42cb8596302d4d8be5ebe79e317a0b910de3fee5b49e2fb
SSDEEP

12288:qX6kgpq5+/10ikjy6jEgMNtTJXPjQewu5xWUPJbbiEUW34/:qX68W1P6jEgMDFjmUBqEUW

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
2168	DZELTLDSZLEMEpdf.bat.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\hulas.flo	DZELTLDSZLEMEpdf.bat.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2168	DZELTLDSZLEMEpdf.bat.exe
2624	DZELTLDSZLEMEpdf.bat.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2168 set thread context of 2624	2168	DZELTLDSZLEMEpdf.bat.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	DZELTLDSZLEMEpdf.bat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DZELTLDSZLEMEpdf.bat.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2168	DZELTLDSZLEMEpdf.bat.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2168 wrote to memory of 2624	2168	DZELTLDSZLEMEpdf.bat.exe	31
PID 2168 wrote to memory of 2624	2168	DZELTLDSZLEMEpdf.bat.exe	31
PID 2168 wrote to memory of 2624	2168	DZELTLDSZLEMEpdf.bat.exe	31
PID 2168 wrote to memory of 2624	2168	DZELTLDSZLEMEpdf.bat.exe	31
PID 2168 wrote to memory of 2624	2168	DZELTLDSZLEMEpdf.bat.exe	31
PID 2168 wrote to memory of 2624	2168	DZELTLDSZLEMEpdf.bat.exe	31

C:\Users\Admin\AppData\Local\Temp\DZELTLDSZLEMEpdf.bat.exe
"C:\Users\Admin\AppData\Local\Temp\DZELTLDSZLEMEpdf.bat.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Users\Admin\AppData\Local\Temp\DZELTLDSZLEMEpdf.bat.exe
  "C:\Users\Admin\AppData\Local\Temp\DZELTLDSZLEMEpdf.bat.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2624

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

\Users\Admin\AppData\Local\Temp\nsdD673.tmp\System.dll

Filesize
12KB

MD5
4add245d4ba34b04f213409bfe504c07

SHA1
ef756d6581d70e87d58cc4982e3f4d18e0ea5b09

SHA256
9111099efe9d5c9b391dc132b2faf0a3851a760d4106d5368e30ac744eb42706

SHA512
1bd260cabe5ea3cefbbc675162f30092ab157893510f45a1b571489e03ebb2903c55f64f89812754d3fe03c8f10012b8078d1261a7e73ac1f87c82f714bce03d

Download Submit
memory/2168-13-0x0000000004010000-0x00000000050D6000-memory.dmp

Filesize
16.8MB

Download
memory/2168-14-0x00000000772F1000-0x00000000773F2000-memory.dmp

Filesize
1.0MB

Download
memory/2168-15-0x00000000772F0000-0x0000000077499000-memory.dmp

Filesize
1.7MB

Download
memory/2168-16-0x0000000004010000-0x00000000050D6000-memory.dmp

Filesize
16.8MB

Download
memory/2168-32-0x0000000004010000-0x00000000050D6000-memory.dmp

Filesize
16.8MB

Download
memory/2624-17-0x0000000001470000-0x0000000002536000-memory.dmp

Filesize
16.8MB

Download
memory/2624-18-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2624-19-0x00000000772F0000-0x0000000077499000-memory.dmp

Filesize
1.7MB

Download
memory/2624-20-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download