guloader | f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91

General

Target

f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.exe
Size

1.0MB
MD5

fd533f80090c761f06b499dd63f5cb10
SHA1

2534671af3824e6b8edcdbdf6e06789050074e0e
SHA256

f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91
SHA512

083e8e1e00c39b9e5e708f0f3149313ba46659e7503791aee5ac31deb64413c7890633c4f3e4869abcefd55880e2e2b538b1003de3f4944b6979cbe13e049508
SSDEEP

24576:+5bgDPHeGskuYMexXYvRCEOYkYRU2fNYwYtYPY:+5qPHeGh5ovRH1bqyuXOg

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Downloads MZ/PE file 1 IoCs

flow	pid	Process
41	4012	Process not Found

Loads dropped DLL 2 IoCs

pid	Process
1684	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.exe
1684	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1684	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.exe
3768	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\Gundelet\gleditsia.ini	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.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 3 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	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MicrosoftEdgeUpdate.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1876	MicrosoftEdgeUpdate.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1684	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1684 wrote to memory of 3768	1684	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.exe	89
PID 1684 wrote to memory of 3768	1684	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.exe	89
PID 1684 wrote to memory of 3768	1684	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.exe	89
PID 1684 wrote to memory of 3768	1684	f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.exe	89

C:\Users\Admin\AppData\Local\Temp\f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.exe
"C:\Users\Admin\AppData\Local\Temp\f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1684
- C:\Users\Admin\AppData\Local\Temp\f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.exe
  "C:\Users\Admin\AppData\Local\Temp\f7b61d74ed091d52a93af97e15333b59cec299e026647c58830ccf0baf3d9c91N.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:3768

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIxIiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDY0MzMiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODc1OTU2NTAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1MzgwMTI2OTU5Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:1876

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nssA605.tmp\System.dll

Filesize
11KB

MD5
cf85183b87314359488b850f9e97a698

SHA1
6b6c790037eec7ebea4d05590359cb4473f19aea

SHA256
3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac

SHA512
fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

Download Submit
C:\Users\Admin\Quiddler\markus\superceded\ned.ini

Filesize
34KB

MD5
46d760ff5d80888a54a38d5bd968c3b9

SHA1
074ffba863941492da6fceb711fc6f6d49884d62

SHA256
89da4d13eedf0d1128752be5993608a45d8b1d3377ce852cac6938c0514f7952

SHA512
5c1429bc19c1c154a746ba09376d35293b60a4f95196db3acbbc738d4f3a65c93fc67bdcfc4d15db5485d4bf8cc7bddd8d93c150e2760c88b1bca8aef0cb27c8

Download Submit
memory/1684-29-0x0000000077841000-0x0000000077961000-memory.dmp

Filesize
1.1MB

Download
memory/1684-30-0x0000000077841000-0x0000000077961000-memory.dmp

Filesize
1.1MB

Download
memory/1684-31-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/3768-32-0x0000000001660000-0x0000000006C2A000-memory.dmp

Filesize
85.8MB

Download
memory/3768-33-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3768-34-0x00000000778C8000-0x00000000778C9000-memory.dmp

Filesize
4KB

Download
memory/3768-35-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3768-36-0x00000000778E5000-0x00000000778E6000-memory.dmp

Filesize
4KB

Download
memory/3768-37-0x0000000077841000-0x0000000077961000-memory.dmp

Filesize
1.1MB

Download

Analysis

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