guloader | bf99b231b81ab2ba895c0cbf395a5fdb5fc18d3465592150e365f31302c8250a

General

Target

547612a9ff746063a74c71b009230500.exe
Size

112KB
MD5

547612a9ff746063a74c71b009230500
SHA1

c04b0adc612addc701e3a0336a4e8a23fbd331c4
SHA256

bf99b231b81ab2ba895c0cbf395a5fdb5fc18d3465592150e365f31302c8250a
SHA512

545b74192e076e46a960a05e5281dedfd00c7fc002aeec60f04f55543eb79beaa2866ab20e16903e2d1601275e28be73fa0a5ef5abe23fd2e13c38805cdd9402

Score

10^/10

guloader neshta downloader persistence spyware stealer

Malware Config

Signatures

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

Modifies system executable filetype association 2 TTPs 1 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1042

Processes:

547612a9ff746063a74c71b009230500.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*"	547612a9ff746063a74c71b009230500.exe

Neshta
Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.
persistence spyware neshta
Executes dropped EXE 1 IoCs

Processes:

547612a9ff746063a74c71b009230500.exe

pid process

1640 547612a9ff746063a74c71b009230500.exe
Checks QEMU agent file 2 TTPs 1 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry
T1012

System Information Discovery
T1082

Processes:

547612a9ff746063a74c71b009230500.exe

description ioc process

File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe 547612a9ff746063a74c71b009230500.exe
Loads dropped DLL 1 IoCs

Processes:

547612a9ff746063a74c71b009230500.exe

pid process

2648 547612a9ff746063a74c71b009230500.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

547612a9ff746063a74c71b009230500.exe

pid process

1640 547612a9ff746063a74c71b009230500.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

547612a9ff746063a74c71b009230500.exe

description pid process target process

PID 1640 set thread context of 2648 1640 547612a9ff746063a74c71b009230500.exe 547612a9ff746063a74c71b009230500.exe

pid	process
1640	547612a9ff746063a74c71b009230500.exe

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	547612a9ff746063a74c71b009230500.exe

pid	process
2648	547612a9ff746063a74c71b009230500.exe

pid	process
1640	547612a9ff746063a74c71b009230500.exe

description	pid	process	target process
PID 1640 set thread context of 2648	1640	547612a9ff746063a74c71b009230500.exe	547612a9ff746063a74c71b009230500.exe

Drops file in Program Files directory 55 IoCs

Processes:

547612a9ff746063a74c71b009230500.exe

description	ioc	process
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\READER~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Google\Update\1335~1.452\GOOGLE~2.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\MAINTE~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\FULLTR~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Java\JAVAUP~1\jaureg.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\AcroRd32.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Google\Update\1335~1.452\GOOGLE~3.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Google\Update\DISABL~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{CA675~1\VCREDI~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ielowutil.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\WINDOW~2\WinMail.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ADOBEC~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\plug_ins\PI_BRO~1\32BITM~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\MSInfo\msinfo32.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Google\Update\1335~1.452\GOOGLE~4.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\plug_ins\PI_BRO~1\64BITM~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmpconfig.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ieinstal.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\ARM\1.0\AdobeARM.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Google\Update\1335~1.452\GOOGLE~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Google\Update\1335~1.452\GO664E~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmpshare.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Java\JAVAUP~1\jucheck.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Google\Temp\GUM18A1.tmp\GOFB2B~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\LOGTRA~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\AcroCEF\RdrCEF.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROBR~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Java\JAVAUP~1\jusched.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmprph.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\ACCESS~1\wordpad.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~3\Adobe\Setup\{AC76B~1\setup.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\ARM\1.0\ADOBEA~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\VSTO\10.0\VSTOIN~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\INTERN~1\iexplore.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmplayer.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Google\Update\1335~1.452\GOFB2B~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\WINDOW~2\wab.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\WI8A19~1\ImagingDevices.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{F4220~1\VC_RED~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROTE~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\Browser\WCCHRO~1\WCCHRO~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Google\Update\1335~1.452\GOF5E2~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\setup_wm.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Google\Update\1335~1.452\GOBD5D~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ExtExport.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\UNINST~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\ARM\1.0\armsvc.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\WINDOW~2\wabmig.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ADelRCP.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\arh.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\Eula.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\WOW_HE~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmlaunch.exe	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~3\MICROS~1\CLICKT~1\{9AC08~1\INTEGR~1.EXE	547612a9ff746063a74c71b009230500.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{EF6B0~1\VCREDI~1.EXE	547612a9ff746063a74c71b009230500.exe

Drops file in Windows directory 1 IoCs

Processes:

547612a9ff746063a74c71b009230500.exe

description ioc process

File opened for modification C:\Windows\svchost.com 547612a9ff746063a74c71b009230500.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	ioc	process
File opened for modification	C:\Windows\svchost.com	547612a9ff746063a74c71b009230500.exe

Modifies registry class 1 IoCs

Processes:

547612a9ff746063a74c71b009230500.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*"	547612a9ff746063a74c71b009230500.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

547612a9ff746063a74c71b009230500.exe

pid process

1640 547612a9ff746063a74c71b009230500.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

547612a9ff746063a74c71b009230500.exe

pid process

1640 547612a9ff746063a74c71b009230500.exe

pid	process
1640	547612a9ff746063a74c71b009230500.exe

pid	process
1640	547612a9ff746063a74c71b009230500.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

547612a9ff746063a74c71b009230500.exe547612a9ff746063a74c71b009230500.exe

description	pid	process	target process
PID 3008 wrote to memory of 1640	3008	547612a9ff746063a74c71b009230500.exe	547612a9ff746063a74c71b009230500.exe
PID 3008 wrote to memory of 1640	3008	547612a9ff746063a74c71b009230500.exe	547612a9ff746063a74c71b009230500.exe
PID 3008 wrote to memory of 1640	3008	547612a9ff746063a74c71b009230500.exe	547612a9ff746063a74c71b009230500.exe
PID 1640 wrote to memory of 2648	1640	547612a9ff746063a74c71b009230500.exe	547612a9ff746063a74c71b009230500.exe
PID 1640 wrote to memory of 2648	1640	547612a9ff746063a74c71b009230500.exe	547612a9ff746063a74c71b009230500.exe
PID 1640 wrote to memory of 2648	1640	547612a9ff746063a74c71b009230500.exe	547612a9ff746063a74c71b009230500.exe
PID 1640 wrote to memory of 2648	1640	547612a9ff746063a74c71b009230500.exe	547612a9ff746063a74c71b009230500.exe

C:\Users\Admin\AppData\Local\Temp\547612a9ff746063a74c71b009230500.exe
"C:\Users\Admin\AppData\Local\Temp\547612a9ff746063a74c71b009230500.exe"
1⤵
- Modifies system executable filetype association
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3008

C:\Users\Admin\AppData\Local\Temp\3582-490\547612a9ff746063a74c71b009230500.exe
"C:\Users\Admin\AppData\Local\Temp\3582-490\547612a9ff746063a74c71b009230500.exe"
2⤵
- Executes dropped EXE
- Checks QEMU agent file
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1640

C:\Users\Admin\AppData\Local\Temp\3582-490\547612a9ff746063a74c71b009230500.exe
"C:\Users\Admin\AppData\Local\Temp\3582-490\547612a9ff746063a74c71b009230500.exe"
3⤵
- Loads dropped DLL
PID:2648

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Change Default File Association

1

T1042

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\3582-490\547612a9ff746063a74c71b009230500.exe
MD5
6ce7cc1f376f6bd9d090eaf04ef72dfe

SHA1
fb2693061f91f2c9fa4480edac7cae0fa7602ec7

SHA256
2e87815522531721634be2ef071b1292612fc7a8a07e785645c37eaf56e0a6e9

SHA512
3d10aa247c8953d20a00af5d46e1e720a14967ff3306d9009c87c8c0754a5d6f924517882503e422513b54b51de0187769fa9f7c0abf3b3f773d5ef6243c2042

Download Submit
C:\Users\Admin\AppData\Local\Temp\3582-490\547612a9ff746063a74c71b009230500.exe
MD5
6ce7cc1f376f6bd9d090eaf04ef72dfe

SHA1
fb2693061f91f2c9fa4480edac7cae0fa7602ec7

SHA256
2e87815522531721634be2ef071b1292612fc7a8a07e785645c37eaf56e0a6e9

SHA512
3d10aa247c8953d20a00af5d46e1e720a14967ff3306d9009c87c8c0754a5d6f924517882503e422513b54b51de0187769fa9f7c0abf3b3f773d5ef6243c2042

Download Submit
C:\Users\Admin\AppData\Local\Temp\3582-490\547612a9ff746063a74c71b009230500.exe
MD5
6ce7cc1f376f6bd9d090eaf04ef72dfe

SHA1
fb2693061f91f2c9fa4480edac7cae0fa7602ec7

SHA256
2e87815522531721634be2ef071b1292612fc7a8a07e785645c37eaf56e0a6e9

SHA512
3d10aa247c8953d20a00af5d46e1e720a14967ff3306d9009c87c8c0754a5d6f924517882503e422513b54b51de0187769fa9f7c0abf3b3f773d5ef6243c2042

Download Submit
memory/1640-114-0x0000000000000000-mapping.dmp

Download
memory/1640-119-0x0000000003510000-0x000000000351F000-memory.dmp

Filesize
60KB

Download
memory/1640-124-0x00007FFFFE1A0000-0x00007FFFFE37B000-memory.dmp

Filesize
1.9MB

Download
memory/1640-125-0x00000000771E0000-0x000000007736E000-memory.dmp

Filesize
1.6MB

Download
memory/1640-126-0x00000000771E0000-0x000000007736E000-memory.dmp

Filesize
1.6MB

Download
memory/2648-120-0x000000000040135C-mapping.dmp

Download
memory/2648-122-0x0000000000400000-0x0000000000553000-memory.dmp

Filesize
1.3MB

Download
memory/2648-123-0x0000000000401000-0x00000000004FD000-memory.dmp

Filesize
1008KB

Download
memory/2648-127-0x0000000000560000-0x0000000000660000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads