guloader | 22c12442f9ec85f619409b34efefe91b702d128ac6e0ebb4e27c021de64fd394

General

Target

4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe
Size

246KB
MD5

8ec815faae06ac952b5f1b173446946c
SHA1

df6c7646bad782a890558d0e4324ed01ce81da60
SHA256

4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300
SHA512

b1f083dc00f485fa2f6acaec22d98d8f547e520638bc9fc0293db90ab263cc7197ed39734f07609ab906375fbc875c82b24e467ea8fac1df09afb554f9a970cc
SSDEEP

6144:iT4Dt+KsyVTQuVy808j/EP/ZHUr/ic2rsqVAxvOz7:iTKtVTQur084/Q/er1VN

Score

10^/10

guloader discovery downloader

Malware Config

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	4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe

Loads dropped DLL 1 IoCs

pid	Process
4064	4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Infanterienhedernes\Chelated\Vy54.lnk	4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4064	4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe
3988	4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4064 set thread context of 3988	4064	4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe	87

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\Arius\Sveskeblomme\Mervrdiafgifts84.ini	4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.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	4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4064	4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4064 wrote to memory of 3988	4064	4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe	87
PID 4064 wrote to memory of 3988	4064	4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe	87
PID 4064 wrote to memory of 3988	4064	4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe	87
PID 4064 wrote to memory of 3988	4064	4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe	87

C:\Users\Admin\AppData\Local\Temp\4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe
"C:\Users\Admin\AppData\Local\Temp\4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Drops file in System32 directory
- 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:4064
- C:\Users\Admin\AppData\Local\Temp\4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe
  "C:\Users\Admin\AppData\Local\Temp\4783eea1eb0d11b98d15039aa6c9e5297ca7d166d3744c61ee09675f593e7300.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:3988

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

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsgA1D0.tmp\System.dll

Filesize
12KB

MD5
6e55a6e7c3fdbd244042eb15cb1ec739

SHA1
070ea80e2192abc42f358d47b276990b5fa285a9

SHA256
acf90ab6f4edc687e94aaf604d05e16e6cfb5e35873783b50c66f307a35c6506

SHA512
2d504b74da38edc967e3859733a2a9cacd885db82f0ca69bfb66872e882707314c54238344d45945dc98bae85772aceef71a741787922d640627d3c8ae8f1c35

Download Submit
memory/3988-16-0x0000000077818000-0x0000000077819000-memory.dmp

Filesize
4KB

Download
memory/3988-15-0x0000000001660000-0x0000000001760000-memory.dmp

Filesize
1024KB

Download
memory/3988-14-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3988-17-0x0000000001660000-0x0000000001760000-memory.dmp

Filesize
1024KB

Download
memory/3988-18-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3988-19-0x0000000077791000-0x00000000778B1000-memory.dmp

Filesize
1.1MB

Download
memory/4064-10-0x0000000077791000-0x00000000778B1000-memory.dmp

Filesize
1.1MB

Download
memory/4064-13-0x00000000743E5000-0x00000000743E6000-memory.dmp

Filesize
4KB

Download
memory/4064-12-0x0000000077791000-0x00000000778B1000-memory.dmp

Filesize
1.1MB

Download
memory/4064-11-0x0000000004250000-0x0000000004370000-memory.dmp

Filesize
1.1MB

Download
memory/4064-9-0x0000000004250000-0x0000000004370000-memory.dmp

Filesize
1.1MB

Download
memory/4064-25-0x0000000004250000-0x0000000004370000-memory.dmp

Filesize
1.1MB

Download

Analysis

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