guloader | 174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a

General

Target
174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe
Size 402KB
Sample260810-ej1wta1aqe
SHA256 174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a
MD5 05303a7d2a6b9a8672abaa23abf2c99c
SHA1 6c7c555a55f3b3d7b58c71f6ecb8df87e9296a06
SHA512 8402dc6f418451b3b832e367ddf35758e7b10ca2e3c59d1057cb736a134ed9d5a86f85a4a726b5fbcd77fc764da6862c803eec8ed4b518c4491f54df8e5fbaea
SSDEEP 6144:Jwq3Nplp8rtzZ3vxjmMAQFEY86jgGf5LYR1tQ73cnfU71437AU4asFS7kq9DCfQz:JzhufPAgEYFVLaFkqooa4F8LW/cQ5
TLSH
T1F294BF423D0CA8D7ED3D2372296785862FB474BA4B92169F7AAFF65648023034E1FD5C
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery downloader guloader persistence

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
3356	174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1875162379-3804078649-638427191-1000\Software\Microsoft\Windows\CurrentVersion\Run\Startup key = "C:\\Users\\Admin\\AppData\\Local\\Temp\\directory\\filename.exe"	174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3356	174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe
2288	174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1636	2288	WerFault.exe	91

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	174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3356	174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3356 wrote to memory of 2868	3356	174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe	90
PID 3356 wrote to memory of 2288	3356	174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe	91
PID 3356 wrote to memory of 2288	3356	174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe	91
PID 2288 wrote to memory of 2624	2288	174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe	93

C:\Users\Admin\AppData\Local\Temp\174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe
"C:\Users\Admin\AppData\Local\Temp\174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3356
- C:\Users\Admin\AppData\Local\Temp\174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe
  "C:\Users\Admin\AppData\Local\Temp\174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe"
  2⤵
  PID:2868
- C:\Users\Admin\AppData\Local\Temp\174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe
  "C:\Users\Admin\AppData\Local\Temp\174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2288
- - C:\Users\Admin\AppData\Local\Temp\174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe
    "C:\Users\Admin\AppData\Local\Temp\174047faedae187b42c666c6c34ba1fdb1791b16f1c63f6bd2258fbd6409b77a.exe"
    3⤵
    PID:2624
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2288 -s 1268
    3⤵
    - Program crash
    PID:1636

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 2288 -ip 2288
1⤵
PID:4956

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

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

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Downloads

System.dll

Path C:\Users\Admin\AppData\Local\Temp\nsu74DB.tmp\System.dll
Size 11KB
SHA256 bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb
MD5 17ed1c86bd67e78ade4712be48a7d2bd
SHA1 1cc9fe86d6d6030b4dae45ecddce5907991c01a0
SHA512 0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5
SSDEEP 192:eY24sihno00Wfl97nH6T2enXwWobpWBTU4VtHT7dmN35Ol+Sl:E8QIl975eXqlWBrz7YLOl+
TLSH
T1E3325C12135081F3E4918138C86B3A276B6A15029BF98E57DFD39546BE31BE3BD7D603
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2288-11-0x0000000000400000-0x00000000016E6000-memory.dmp

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memory/2288-12-0x00000000016F0000-0x000000000455E000-memory.dmp

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memory/2288-13-0x0000000000400000-0x00000000016E6000-memory.dmp

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memory/2288-14-0x00000000016F0000-0x000000000455E000-memory.dmp

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memory/2288-16-0x00000000016F0000-0x000000000455E000-memory.dmp

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memory/3356-9-0x0000000003B80000-0x00000000069EE000-memory.dmp

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memory/3356-10-0x0000000010004000-0x0000000010005000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads