guloader | 34125118c603cbb2c4f6e6362e28ab2b8162de4eadf86dcda60c9df74b8be350

General

Target

d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe
Size

164KB
MD5

0040a650409cbf4a64597ee1f64b874f
SHA1

3a54dce238334d6d59ba7a796a43e86c917478a8
SHA256

d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7
SHA512

e54cfb9af724864753a8a6eede4b1ffa5b1e95e8082d5c306f6ad16342af2e48bcb4bf6b137ca43407970cb18ebab16580eeeaf50d425d06fe40e761d93dda49
SSDEEP

3072:etOcNsL93qdY0F51nCyBQifSgwKAs/RF53IyVx1rm7gwc3yGChGZrjFZxFsKdxw6:eUV0rC3i6gys/RF53IyVx1rm7gwc3yG3

Score

10^/10

guloader discovery downloader

Malware Config

Extracted

Family

guloader

C2

http://45.85.90.226/kt.bin

xor.base64

Signatures

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

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1992	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe
2448	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1992 set thread context of 2448	1992	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe	31

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	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1992	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1992	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1992 wrote to memory of 2448	1992	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe	31
PID 1992 wrote to memory of 2448	1992	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe	31
PID 1992 wrote to memory of 2448	1992	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe	31
PID 1992 wrote to memory of 2448	1992	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe	31
PID 1992 wrote to memory of 2448	1992	d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe	31

C:\Users\Admin\AppData\Local\Temp\d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe
"C:\Users\Admin\AppData\Local\Temp\d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe"
1⤵
- Checks QEMU agent file
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1992
- C:\Users\Admin\AppData\Local\Temp\d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe
  "C:\Users\Admin\AppData\Local\Temp\d032bf21aa1029b3d49763fd303dd84ad36c303a07ea1293e039bc8c35c0e1e7.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1992-2-0x0000000000480000-0x000000000048B000-memory.dmp

Filesize
44KB

Download
memory/1992-3-0x0000000076E51000-0x0000000076F52000-memory.dmp

Filesize
1.0MB

Download
memory/1992-4-0x0000000000480000-0x000000000048B000-memory.dmp

Filesize
44KB

Download
memory/1992-5-0x0000000076E50000-0x0000000076FF9000-memory.dmp

Filesize
1.7MB

Download
memory/1992-9-0x0000000077040000-0x0000000077116000-memory.dmp

Filesize
856KB

Download
memory/1992-8-0x0000000000480000-0x000000000048B000-memory.dmp

Filesize
44KB

Download
memory/2448-10-0x0000000076E50000-0x0000000076FF9000-memory.dmp

Filesize
1.7MB

Download
memory/2448-6-0x0000000000400000-0x0000000000553000-memory.dmp

Filesize
1.3MB

Download
memory/2448-11-0x0000000000400000-0x0000000000553000-memory.dmp

Filesize
1.3MB

Download
memory/2448-12-0x0000000000400000-0x0000000000553000-memory.dmp

Filesize
1.3MB

Download

Analysis

Sharing