guloader | 0b503c9f8f6f4879b48c019d31ac921f11d62ab469aa0fce0ac309aca525cde2

General

Target

skihejsene.exe
Size

426KB
MD5

3d5c45dfc5e4d5e92519baaa10eef55e
SHA1

4060970106372cca520182bd6767a372cb1d8881
SHA256

0b503c9f8f6f4879b48c019d31ac921f11d62ab469aa0fce0ac309aca525cde2
SHA512

a02be1e1b1e3ad70208b781ce6f42e7d61ce275f7330acc834832831a1e7abdb89b06907fe39622649ab1dfa61a6631d147c36b14c7aeaa4dfaf1b671b5a3c8e
SSDEEP

12288:oSZkNErxea4TdsqFodI6Ck45qnHY4XfoYX:VZ6Eroa4vFNIPb

Score

10^/10

guloader remcos remotehost downloader rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.3.223.132:2404

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-JJJLWY
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

Processes:

skihejsene.exeskihejsene.exe

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

Loads dropped DLL 1 IoCs

Processes:

skihejsene.exe

pid process

948 skihejsene.exe
Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

skihejsene.exe

pid process

1780 skihejsene.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

skihejsene.exeskihejsene.exe

pid process

948 skihejsene.exe
1780 skihejsene.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

skihejsene.exe

description pid process target process

PID 948 set thread context of 1780 948 skihejsene.exe skihejsene.exe

pid	process
948	skihejsene.exe

pid	process
1780	skihejsene.exe

pid	process
948	skihejsene.exe
1780	skihejsene.exe

description	pid	process	target process
PID 948 set thread context of 1780	948	skihejsene.exe	skihejsene.exe

Drops file in Windows directory 2 IoCs

Processes:

skihejsene.exe

description	ioc	process
File opened for modification	C:\Windows\Fonts\Superdatamat18.ini	skihejsene.exe
File opened for modification	C:\Windows\Ruellia\Tilgangsrettighederne\Scranny.Pat	skihejsene.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

skihejsene.exe

pid process

948 skihejsene.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

skihejsene.exe

pid process

1780 skihejsene.exe

pid	process
948	skihejsene.exe

pid	process
1780	skihejsene.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

skihejsene.exe

description	pid	process	target process
PID 948 wrote to memory of 1780	948	skihejsene.exe	skihejsene.exe
PID 948 wrote to memory of 1780	948	skihejsene.exe	skihejsene.exe
PID 948 wrote to memory of 1780	948	skihejsene.exe	skihejsene.exe
PID 948 wrote to memory of 1780	948	skihejsene.exe	skihejsene.exe
PID 948 wrote to memory of 1780	948	skihejsene.exe	skihejsene.exe

C:\Users\Admin\AppData\Local\Temp\skihejsene.exe
"C:\Users\Admin\AppData\Local\Temp\skihejsene.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:948

C:\Users\Admin\AppData\Local\Temp\skihejsene.exe
"C:\Users\Admin\AppData\Local\Temp\skihejsene.exe"
2⤵
- Checks QEMU agent file
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
PID:1780

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Windows\Fonts\Superdatamat18.ini
Filesize
42B

MD5
0efb517a38bad656ca0827dbef67154b

SHA1
96c246f8d332e42f17ec5d63f73f319fe0c5fa8a

SHA256
2a51482adc1ee0a79bff2a3f5ac2e9e300478856ae83d129aceed76f0354926c

SHA512
ecea23873e00adbcd2a0a839a6aaaee20bdfc5c72cd22b560564f8e894845a1c840d4d85643f0a3e09a054018273816c4b5d8a41828e3d9a324590d7293e9227

Download Submit
\Users\Admin\AppData\Local\Temp\nsy4829.tmp\System.dll
Filesize
11KB

MD5
375e8a08471dc6f85f3828488b1147b3

SHA1
1941484ac710fc301a7d31d6f1345e32a21546af

SHA256
4c86b238e64ecfaabe322a70fd78db229a663ccc209920f3385596a6e3205f78

SHA512
5ba29db13723ddf27b265a4548606274b850d076ae1f050c64044f8ccd020585ad766c85c3e20003a22f356875f76fb3679c89547b0962580d8e5a42b082b9a8

Download Submit
memory/948-17099-0x0000000003BA0000-0x0000000005C34000-memory.dmp

Filesize
32.6MB

Download
memory/948-17100-0x0000000003BA0000-0x0000000005C34000-memory.dmp

Filesize
32.6MB

Download
memory/1780-17101-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1780-17102-0x0000000001470000-0x0000000003504000-memory.dmp

Filesize
32.6MB

Download
memory/1780-17103-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1780-17104-0x0000000001470000-0x0000000003504000-memory.dmp

Filesize
32.6MB

Download
memory/1780-17105-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1780-17111-0x0000000001470000-0x0000000003504000-memory.dmp

Filesize
32.6MB

Download
memory/1780-17114-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1780-17118-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads