guloader | 164d2088fffcd3505e2b84e3447cdc51edfc635ee7f9af47ba514da0317db07b

General

Target

Drjhederne.exe
Size

355KB
MD5

3ed7fca45612a450729f2106bffc98f3
SHA1

b4c06fd414d49d91ec39fc988f5a6834eee5eeaf
SHA256

164d2088fffcd3505e2b84e3447cdc51edfc635ee7f9af47ba514da0317db07b
SHA512

07ae61d06218ed39d830474e08f6ac436dacfbb12a4acf3464225056069d46f5e57da75c03b57616f88dbda69614481c4f3b1c30299e5df5cb51b333c0905ff0
SSDEEP

6144:WRlWoKEPgXCiSs0sndk13ZWLDiyB9JisWFwd3kQg/+Ha6F8:m5SSv0S14XiS9Jitwih/Kl

Score

10^/10

guloader remcos remotehost downloader rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

172.93.187.111:2404

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-SOF1RR
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

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

Loads dropped DLL 2 IoCs

pid	Process
1676	Drjhederne.exe
1676	Drjhederne.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1040	Drjhederne.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1676	Drjhederne.exe
1040	Drjhederne.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1676 set thread context of 1040	1676	Drjhederne.exe	28

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\Absurditets\Bevidstgrelsernes.ini	Drjhederne.exe

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

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1676	Drjhederne.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1040	Drjhederne.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1676 wrote to memory of 1040	1676	Drjhederne.exe	28
PID 1676 wrote to memory of 1040	1676	Drjhederne.exe	28
PID 1676 wrote to memory of 1040	1676	Drjhederne.exe	28
PID 1676 wrote to memory of 1040	1676	Drjhederne.exe	28
PID 1676 wrote to memory of 1040	1676	Drjhederne.exe	28

C:\Users\Admin\AppData\Local\Temp\Drjhederne.exe
"C:\Users\Admin\AppData\Local\Temp\Drjhederne.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:1676
- C:\Users\Admin\AppData\Local\Temp\Drjhederne.exe
  "C:\Users\Admin\AppData\Local\Temp\Drjhederne.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetWindowsHookEx
  PID:1040

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

1

T1102

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\ProgramData\remcos\logs.dat

Filesize
196B

MD5
2a8bc6fd0a99d54b0c55a1208316245b

SHA1
ac77a211d70386fb5d25902ed028235e0954be0b

SHA256
ef4c1e11ab17f5a61849bd45dceabb8c3c6650eb5fb321b0f05ef2f9f9d3ed45

SHA512
a3170eabb8cb045cb1221ad4b51dafbe43a6dc2a2044c012648707cdcec3e5cc85e333f114d8918f521e0aff8629e2cfeb00841a56c14aeee0bac05059f25bfd

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsdFA96.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
\Users\Admin\AppData\Local\Temp\nsdFA96.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
\Users\Admin\AppData\Local\Temp\nsdFA96.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
memory/1040-120-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1040-68-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1040-143-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1040-71-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1040-94-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1040-98-0x0000000001470000-0x0000000001E2A000-memory.dmp

Filesize
9.7MB

Download
memory/1040-99-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1040-100-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1040-101-0x0000000001470000-0x0000000001E2A000-memory.dmp

Filesize
9.7MB

Download
memory/1040-105-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1040-108-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1040-69-0x0000000001470000-0x0000000001E2A000-memory.dmp

Filesize
9.7MB

Download
memory/1040-112-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1040-116-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1040-139-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1040-124-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1040-127-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1040-131-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1040-135-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1676-67-0x0000000002D50000-0x000000000370A000-memory.dmp

Filesize
9.7MB

Download
memory/1676-70-0x0000000002D50000-0x000000000370A000-memory.dmp

Filesize
9.7MB

Download

Analysis

Sharing