guloader | 8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514

General

Target

8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe
Size

970KB
MD5

492707a5e753b9c5faa6a9829e065775
SHA1

7a48c9ae447780551a9714b5cccde57f16094e01
SHA256

8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514
SHA512

e7ab1808dadb1a1da12ac66e6f9c631a5ca58b4575bebfba21aa6b6907153bd8e4af2904e3039a77f0a4f9bc94cd408f108c05181878270c5446862b01ffa707
SSDEEP

24576:oewAoAZIk1OYV8pC0SUGKSGnx7eq0xQUsHVSm:CAFLErOUGKSe5eq0xQhHs

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 6 IoCs

Processes:

8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe

pid	Process
3344	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe
3344	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe
3344	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe
3344	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe
3344	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe
3344	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe

pid	Process
3344	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe
3936	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe

description	pid	Process	procid_target
PID 3344 set thread context of 3936	3344	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe	89

Drops file in Windows directory 1 IoCs

Processes:

8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\mysterist.ini	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.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

Processes:

8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe

pid	Process
3344	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe

description	pid	Process	procid_target
PID 3344 wrote to memory of 3936	3344	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe	89
PID 3344 wrote to memory of 3936	3344	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe	89
PID 3344 wrote to memory of 3936	3344	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe	89
PID 3344 wrote to memory of 3936	3344	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe	89
PID 3344 wrote to memory of 3936	3344	8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe	89

C:\Users\Admin\AppData\Local\Temp\8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe
"C:\Users\Admin\AppData\Local\Temp\8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.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:3344
- C:\Users\Admin\AppData\Local\Temp\8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe
  "C:\Users\Admin\AppData\Local\Temp\8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:3936

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

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsn806C.tmp\LangDLL.dll

Filesize
5KB

MD5
3dd80dff583544514eeb3a5ed851a519

SHA1
56f7324d9d4230c96d1963e7b3e02b05a6cf5c24

SHA256
86cff5eaca76c49f924cb123d242fdcfd45ab99c4b638d3b8f4a8cfb1970ab5b

SHA512
955f4df195b5d134449904e9020f80125cfb64d70d9482ff583451f3fcb10d15577ceac4180f71a96452d8478f6365160ab15731f9a79a494383087c9310fd1d

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsn806C.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
memory/3344-27-0x0000000004A50000-0x0000000005C3D000-memory.dmp

Filesize
17.9MB

Download
memory/3344-28-0x0000000076E61000-0x0000000076F81000-memory.dmp

Filesize
1.1MB

Download
memory/3344-29-0x0000000073CC4000-0x0000000073CC5000-memory.dmp

Filesize
4KB

Download
memory/3344-31-0x0000000004A50000-0x0000000005C3D000-memory.dmp

Filesize
17.9MB

Download
memory/3936-30-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3936-32-0x0000000001660000-0x000000000284D000-memory.dmp

Filesize
17.9MB

Download
memory/3936-33-0x0000000076EE8000-0x0000000076EE9000-memory.dmp

Filesize
4KB

Download
memory/3936-34-0x0000000076F05000-0x0000000076F06000-memory.dmp

Filesize
4KB

Download
memory/3936-35-0x0000000001660000-0x000000000284D000-memory.dmp

Filesize
17.9MB

Download
memory/3936-37-0x0000000076E61000-0x0000000076F81000-memory.dmp

Filesize
1.1MB

Download
memory/3936-36-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads