guloader | d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400

General

Target

d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe
Size

539KB
MD5

4183d5786fe2a0e4563c5a0cf57d92f6
SHA1

2fc414de34b92a56712c6684c84af970037b81f5
SHA256

d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400
SHA512

8d86235c4d4060d656a1a2349a43e7ddfc9d036d476dbf8b9d404af060b754eb33bdc74ee03881f769fd19a60b87daefc696e48ee33f40b1e24f358dfe9a87fc
SSDEEP

12288:DMq47lWuTq/3dOxotjTps+ZHmkHN3HiPCpfBVxe:I/WuTsoWt1HnHpHiwVI

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 2 IoCs

pid	Process
4324	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe
4324	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
18	drive.google.com
19	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4324	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe
1972	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4324 set thread context of 1972	4324	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe	95

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\Trnregimenternes\totalsanerende.Obs202	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.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 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	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4324	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4324 wrote to memory of 1972	4324	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe	95
PID 4324 wrote to memory of 1972	4324	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe	95
PID 4324 wrote to memory of 1972	4324	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe	95
PID 4324 wrote to memory of 1972	4324	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe	95
PID 4324 wrote to memory of 1972	4324	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe	95

C:\Users\Admin\AppData\Local\Temp\d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe
"C:\Users\Admin\AppData\Local\Temp\d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4324
- C:\Users\Admin\AppData\Local\Temp\d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe
  "C:\Users\Admin\AppData\Local\Temp\d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:1972

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

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\nsc8B0B.tmp\System.dll

Filesize
11KB

MD5
cf85183b87314359488b850f9e97a698

SHA1
6b6c790037eec7ebea4d05590359cb4473f19aea

SHA256
3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac

SHA512
fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

Download Submit
C:\Users\Admin\Music\incinerations.lnk

Filesize
750B

MD5
f4cb5afbacccac64bcc8bde38e8494fe

SHA1
388cbac200068e294897108a89466fe215ae2a48

SHA256
09e4f47a6fc2db5acb8e3f57a3fac640daba8cfe77650d63c57d0f31b736da96

SHA512
ae7e0f2e9f846d3740f7e8667a36f70f77892375b8f182ea917aa0f356595131b75c19be117378b0c09dbca52a481f28f1b70ee0d259379c20b984586e5b1e4f

Download Submit
memory/1972-435-0x00000000016B0000-0x0000000003C01000-memory.dmp

Filesize
37.3MB

Download
memory/1972-445-0x0000000000450000-0x00000000016A4000-memory.dmp

Filesize
18.3MB

Download
memory/1972-449-0x00000000016B0000-0x0000000003C01000-memory.dmp

Filesize
37.3MB

Download
memory/4324-429-0x0000000003460000-0x00000000059B1000-memory.dmp

Filesize
37.3MB

Download
memory/4324-430-0x0000000003460000-0x00000000059B1000-memory.dmp

Filesize
37.3MB

Download
memory/4324-431-0x0000000077691000-0x00000000777B1000-memory.dmp

Filesize
1.1MB

Download
memory/4324-433-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/4324-432-0x0000000077691000-0x00000000777B1000-memory.dmp

Filesize
1.1MB

Download
memory/4324-434-0x0000000003460000-0x00000000059B1000-memory.dmp

Filesize
37.3MB

Download

Analysis

Sharing