guloader | 14573d72508f6702068bdbe98f350829250f67ec262c663170ad26178f4ccf17

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
26/08/2024, 15:36

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General

Target
14573d72508f6702068bdbe98f350829250f67ec262c663170ad26178f4ccf17.vbs
Size 679KB
Sample240826-s2bars1fkb
SHA256 14573d72508f6702068bdbe98f350829250f67ec262c663170ad26178f4ccf17
MD5 b774ea18fabf676e405184e790f090e7
SHA1 010503468b1d41cdb3e97731ebeb32152f77e025
SHA512 958b2833754221fbef57187b02a43b30ffa693e1cd10525c4c4d82fcd81a2623023f27f97335d4c046bd1394aed66336b47d98ccf50229aed7b99ed8885c7d5c
SSDEEP 12288:1cWfA3m/CEVFB8l8LWsZMCE8PPUzSQD98yclxOCi3ifD8zlva:9A3mvFvKsZMC5veuWCmifOly
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
2596	x.exe

Loads dropped DLL 2 IoCs

pid	Process
2596	x.exe
2768	x.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2768	x.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2596	x.exe
2768	x.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2596 set thread context of 2768	2596	x.exe	95

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

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
2768	x.exe
2768	x.exe
2768	x.exe
2768	x.exe
2768	x.exe
2768	x.exe
2768	x.exe
2768	x.exe
2768	x.exe
2768	x.exe
2768	x.exe
2768	x.exe
2768	x.exe
2768	x.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2596	x.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3180 wrote to memory of 2596	3180	WScript.exe	84
PID 3180 wrote to memory of 2596	3180	WScript.exe	84
PID 3180 wrote to memory of 2596	3180	WScript.exe	84
PID 2596 wrote to memory of 2768	2596	x.exe	95
PID 2596 wrote to memory of 2768	2596	x.exe	95
PID 2596 wrote to memory of 2768	2596	x.exe	95
PID 2596 wrote to memory of 2768	2596	x.exe	95
PID 2596 wrote to memory of 2768	2596	x.exe	95

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\14573d72508f6702068bdbe98f350829250f67ec262c663170ad26178f4ccf17.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3180
- C:\Users\Admin\AppData\Local\Temp\x.exe
  "C:\Users\Admin\AppData\Local\Temp\x.exe"
  2⤵
  - Executes dropped EXE
  - 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:2596
- - C:\Users\Admin\AppData\Local\Temp\x.exe
    "C:\Users\Admin\AppData\Local\Temp\x.exe"
    3⤵
    - Loads dropped DLL
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2768

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

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

System.dll

Path C:\Users\Admin\AppData\Local\Temp\nsvB989.tmp\System.dll
Size 12KB
SHA256 8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8
MD5 cff85c549d536f651d4fb8387f1976f2
SHA1 d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e
SHA512 531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88
SSDEEP 192:Zjvco0qWTlt70m5Aj/lQ0sEWD/wtYbBHFNaDybC7y+XBz0QPi:FHQlt70mij/lQRv/9VMjzr
MD5 SHA1 SHA512 SSDEEP

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x.exe

Path C:\Users\Admin\AppData\Local\Temp\x.exe
Size 458KB
SHA256 d827a9d3f94f948b8e622495ad37ea5bec064d41612bc956eb5cf78d76d94589
MD5 4651ba76d209195cce549d778890d60f
SHA1 7cb761f66c827ca325eac0c7cef77e51c5f182fa
SHA512 530135e50e0bcb6b183ba2edd389f37862f7e1222238fb6c2ccaf8fa2646c630de4f80af4bae0fc05aaea022b94dacd12e180d57053a1ebc47231072bf905201
SSDEEP 12288:eNCdzE3UK4Vtb6jQNtBMsC5FKUfQ22EfdFiMP:eNczE3UzVtwoQsCmxTEfdP
MD5 SHA1 SHA512 SSDEEP

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memory/2596-35-0x0000000003090000-0x000000000416F000-memory.dmp

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memory/2596-21-0x0000000003090000-0x000000000416F000-memory.dmp

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memory/2596-22-0x0000000077611000-0x0000000077731000-memory.dmp

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memory/2596-23-0x0000000074AB5000-0x0000000074AB6000-memory.dmp

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memory/2596-25-0x0000000003090000-0x000000000416F000-memory.dmp

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memory/2768-26-0x00000000016C0000-0x000000000279F000-memory.dmp

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memory/2768-33-0x0000000000460000-0x00000000016B4000-memory.dmp

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memory/2768-36-0x0000000000460000-0x00000000016B4000-memory.dmp

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memory/2768-37-0x00000000016C0000-0x000000000279F000-memory.dmp

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memory/2768-38-0x0000000000460000-0x00000000016B4000-memory.dmp

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memory/2768-39-0x0000000000460000-0x00000000016B4000-memory.dmp

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memory/2768-42-0x0000000000460000-0x00000000016B4000-memory.dmp

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