guloader | 4d99dbdd282865eaf0dc3fd76d9eb031a3e1565d6e8e3101da0009262aa16872

General

Target

07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe
Size

269KB
MD5

d2e31c73af82cd670b487cf9bb5daf7f
SHA1

7954c56dc41baff77c51d9b52626fe8bb9298751
SHA256

07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b
SHA512

e682bb8137a21956e37594bbd1a20007a9f6938ef56db9be19dea04b8e61584db398a81dbf6c842c24deb705150d4f38403143dff33d38b250aefcfd7abd44e7
SSDEEP

6144:X1ssjw8OeS6xxJUwM5ew23FIgWcU7ipzWKXzY:usketJUB5ew2yuU7iNfE

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	07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe

Loads dropped DLL 1 IoCs

pid	Process
2764	07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2764	07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe
2524	07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2764 set thread context of 2524	2764	07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe	31

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\Sjakaltpperne\Uselviskheds\Konversationsleksikons227\Retsforflgelsernes.Man	07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.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	07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2764	07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2764 wrote to memory of 2524	2764	07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe	31
PID 2764 wrote to memory of 2524	2764	07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe	31
PID 2764 wrote to memory of 2524	2764	07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe	31
PID 2764 wrote to memory of 2524	2764	07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe	31
PID 2764 wrote to memory of 2524	2764	07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe	31

C:\Users\Admin\AppData\Local\Temp\07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe
"C:\Users\Admin\AppData\Local\Temp\07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe"
1⤵
- Checks QEMU agent file
- 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:2764
- C:\Users\Admin\AppData\Local\Temp\07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe
  "C:\Users\Admin\AppData\Local\Temp\07b35bc0d76eebc56cd228b1212d08f693cbefcad6878970b626b0ac1809a55b.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2524

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

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

\Users\Admin\AppData\Local\Temp\nseECB2.tmp\System.dll

Filesize
12KB

MD5
792b6f86e296d3904285b2bf67ccd7e0

SHA1
966b16f84697552747e0ddd19a4ba8ab5083af31

SHA256
c7a20bcaa0197aedddc8e4797bbb33fdf70d980f5e83c203d148121c2106d917

SHA512
97edc3410b88ca31abc0af0324258d2b59127047810947d0fb5e7e12957db34d206ffd70a0456add3a26b0546643ff0234124b08423c2c9ffe9bdec6eb210f2c

Download Submit
memory/2524-16-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2524-17-0x00000000773A0000-0x0000000077549000-memory.dmp

Filesize
1.7MB

Download
memory/2524-18-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2764-12-0x0000000003800000-0x0000000003920000-memory.dmp

Filesize
1.1MB

Download
memory/2764-13-0x00000000773A1000-0x00000000774A2000-memory.dmp

Filesize
1.0MB

Download
memory/2764-14-0x00000000773A0000-0x0000000077549000-memory.dmp

Filesize
1.7MB

Download
memory/2764-15-0x0000000003800000-0x0000000003920000-memory.dmp

Filesize
1.1MB

Download
memory/2764-30-0x0000000003800000-0x0000000003920000-memory.dmp

Filesize
1.1MB

Download

Analysis

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