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 spyware stealer

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

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral1/memory/1468-17131-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral1/memory/1468-17144-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral1/memory/1176-17129-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/1176-17126-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/1176-17141-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 7 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1176-17129-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1468-17131-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/1176-17126-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1520-17134-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1520-17135-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1176-17141-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1468-17144-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft

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

1556 skihejsene.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

skihejsene.exe

pid process

1136 skihejsene.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

skihejsene.exeskihejsene.exe

pid process

1556 skihejsene.exe
1136 skihejsene.exe

pid	process
1556	skihejsene.exe

pid	process
1136	skihejsene.exe

pid	process
1556	skihejsene.exe
1136	skihejsene.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

skihejsene.exeskihejsene.exe

description	pid	process	target process
PID 1556 set thread context of 1136	1556	skihejsene.exe	skihejsene.exe
PID 1136 set thread context of 1176	1136	skihejsene.exe	skihejsene.exe
PID 1136 set thread context of 1468	1136	skihejsene.exe	skihejsene.exe
PID 1136 set thread context of 1520	1136	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: EnumeratesProcesses 2 IoCs

Processes:

skihejsene.exe

pid process

1176 skihejsene.exe
1176 skihejsene.exe
Suspicious behavior: MapViewOfSection 4 IoCs

Processes:

skihejsene.exeskihejsene.exe

pid process

1556 skihejsene.exe
1136 skihejsene.exe
1136 skihejsene.exe
1136 skihejsene.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

skihejsene.exe

description pid process

Token: SeDebugPrivilege 1520 skihejsene.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

skihejsene.exe

pid process

1136 skihejsene.exe

pid	process
1176	skihejsene.exe
1176	skihejsene.exe

pid	process
1556	skihejsene.exe
1136	skihejsene.exe
1136	skihejsene.exe
1136	skihejsene.exe

description	pid	process
Token: SeDebugPrivilege	1520	skihejsene.exe

pid	process
1136	skihejsene.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

skihejsene.exeskihejsene.exe

description	pid	process	target process
PID 1556 wrote to memory of 1136	1556	skihejsene.exe	skihejsene.exe
PID 1556 wrote to memory of 1136	1556	skihejsene.exe	skihejsene.exe
PID 1556 wrote to memory of 1136	1556	skihejsene.exe	skihejsene.exe
PID 1556 wrote to memory of 1136	1556	skihejsene.exe	skihejsene.exe
PID 1556 wrote to memory of 1136	1556	skihejsene.exe	skihejsene.exe
PID 1136 wrote to memory of 1176	1136	skihejsene.exe	skihejsene.exe
PID 1136 wrote to memory of 1176	1136	skihejsene.exe	skihejsene.exe
PID 1136 wrote to memory of 1176	1136	skihejsene.exe	skihejsene.exe
PID 1136 wrote to memory of 1176	1136	skihejsene.exe	skihejsene.exe
PID 1136 wrote to memory of 1468	1136	skihejsene.exe	skihejsene.exe
PID 1136 wrote to memory of 1468	1136	skihejsene.exe	skihejsene.exe
PID 1136 wrote to memory of 1468	1136	skihejsene.exe	skihejsene.exe
PID 1136 wrote to memory of 1468	1136	skihejsene.exe	skihejsene.exe
PID 1136 wrote to memory of 1520	1136	skihejsene.exe	skihejsene.exe
PID 1136 wrote to memory of 1520	1136	skihejsene.exe	skihejsene.exe
PID 1136 wrote to memory of 1520	1136	skihejsene.exe	skihejsene.exe
PID 1136 wrote to memory of 1520	1136	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:1556

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 SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1136

C:\Users\Admin\AppData\Local\Temp\skihejsene.exe
C:\Users\Admin\AppData\Local\Temp\skihejsene.exe /stext "C:\Users\Admin\AppData\Local\Temp\uumncenbiiiqzjacjoyrwvyhta"
3⤵
- Suspicious behavior: EnumeratesProcesses
PID:1176

C:\Users\Admin\AppData\Local\Temp\skihejsene.exe
C:\Users\Admin\AppData\Local\Temp\skihejsene.exe /stext "C:\Users\Admin\AppData\Local\Temp\eosfdwyuwqavkqwgsylshzkyugxii"
3⤵
PID:1468

C:\Users\Admin\AppData\Local\Temp\skihejsene.exe
C:\Users\Admin\AppData\Local\Temp\skihejsene.exe /stext "C:\Users\Admin\AppData\Local\Temp\gixqepiwrysameksbjfmjmfhdngrjiff"
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:1520

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\ProgramData\remcos\logs.dat
Filesize
170B

MD5
e046f662848ce179c7f890fed3cc3691

SHA1
eca30063e28060d980721db56cfd35fb06780653

SHA256
bdfcb8043bb972756ac8c2699b4aad6ceabade35b354e161827672878532b5e0

SHA512
cb1c7f2e61809303eab18c22216a1b11edbc540a76706641668fd89ed1031c87ce2873025648025abb3bd505a8c04708c1a092b39e6ce6ea08d863f460af7562

Download Submit
C:\Users\Admin\AppData\Local\Temp\uumncenbiiiqzjacjoyrwvyhta
Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

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

MD5
0efb517a38bad656ca0827dbef67154b

SHA1
96c246f8d332e42f17ec5d63f73f319fe0c5fa8a

SHA256
2a51482adc1ee0a79bff2a3f5ac2e9e300478856ae83d129aceed76f0354926c

SHA512
ecea23873e00adbcd2a0a839a6aaaee20bdfc5c72cd22b560564f8e894845a1c840d4d85643f0a3e09a054018273816c4b5d8a41828e3d9a324590d7293e9227

Download Submit
\Users\Admin\AppData\Local\Temp\nsj4B74.tmp\System.dll
Filesize
11KB

MD5
375e8a08471dc6f85f3828488b1147b3

SHA1
1941484ac710fc301a7d31d6f1345e32a21546af

SHA256
4c86b238e64ecfaabe322a70fd78db229a663ccc209920f3385596a6e3205f78

SHA512
5ba29db13723ddf27b265a4548606274b850d076ae1f050c64044f8ccd020585ad766c85c3e20003a22f356875f76fb3679c89547b0962580d8e5a42b082b9a8

Download Submit
memory/1136-17103-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1136-17102-0x0000000001470000-0x0000000003504000-memory.dmp

Filesize
32.6MB

Download
memory/1136-17101-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1136-17104-0x0000000001470000-0x0000000003504000-memory.dmp

Filesize
32.6MB

Download
memory/1136-17105-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1136-17111-0x0000000001470000-0x0000000003504000-memory.dmp

Filesize
32.6MB

Download
memory/1136-17114-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1136-17118-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1136-17146-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1176-17124-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1176-17141-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1176-17121-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1176-17126-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1176-17129-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1468-17131-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1468-17127-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1468-17123-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1468-17144-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1520-17128-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1520-17133-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1520-17134-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1520-17135-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1556-17100-0x0000000003B60000-0x0000000005BF4000-memory.dmp

Filesize
32.6MB

Download
memory/1556-17099-0x0000000003B60000-0x0000000005BF4000-memory.dmp

Filesize
32.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads