guloader | ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba

General

Target

HSBCPaymentAdvice.exe
Size

782KB
MD5

4198250ab9b371a88707e6f5885ad17b
SHA1

19204d4586ff59e83ccc974ddf5471690e47eaf1
SHA256

ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba
SHA512

737e445ea137224269e37e61b776f76db7704333c7f73c4bf7769521f3ca8563ebb30983111ae67eee4c9871b3a688cc9d7a3cfab370f59ebb84b18156408fb8
SSDEEP

12288:4GQBy+G5GCSd1eesm6abgGMwNUVPvHooksN:n5+Eq1yHwkvBN

Score

10^/10

guloader remcos benchao discovery downloader rat

Malware Config

Extracted

Family

remcos

Botnet

benchao

C2

tochisglobal.ddns.net:6426

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-9R4HLX
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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

Loads dropped DLL 7 IoCs

pid	Process
2472	HSBCPaymentAdvice.exe
2472	HSBCPaymentAdvice.exe
2472	HSBCPaymentAdvice.exe
2472	HSBCPaymentAdvice.exe
2472	HSBCPaymentAdvice.exe
2472	HSBCPaymentAdvice.exe
2472	HSBCPaymentAdvice.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Dogmefastes.lnk	HSBCPaymentAdvice.exe
File opened for modification	C:\Windows\SysWOW64\Dogmefastes.lnk	HSBCPaymentAdvice.exe
File opened for modification	C:\Windows\SysWOW64\spankingerne\Vidnesbyrd.Syn106	HSBCPaymentAdvice.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2016	wab.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2472	HSBCPaymentAdvice.exe
2016	wab.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2472 set thread context of 2016	2472	HSBCPaymentAdvice.exe	28

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\eudaemons.ini	HSBCPaymentAdvice.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\Opkomlinge\undersluice.yed	HSBCPaymentAdvice.exe
File opened for modification	C:\Windows\resources\lizis\seadromes.ett	HSBCPaymentAdvice.exe
File opened for modification	C:\Windows\resources\sygelejet\devested.per	HSBCPaymentAdvice.exe
File opened for modification	C:\Windows\totlafholdenhedens\Sagittaries.ini	HSBCPaymentAdvice.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	HSBCPaymentAdvice.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wab.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2472	HSBCPaymentAdvice.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2016	wab.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2472 wrote to memory of 2016	2472	HSBCPaymentAdvice.exe	28
PID 2472 wrote to memory of 2016	2472	HSBCPaymentAdvice.exe	28
PID 2472 wrote to memory of 2016	2472	HSBCPaymentAdvice.exe	28
PID 2472 wrote to memory of 2016	2472	HSBCPaymentAdvice.exe	28
PID 2472 wrote to memory of 2016	2472	HSBCPaymentAdvice.exe	28
PID 2472 wrote to memory of 2016	2472	HSBCPaymentAdvice.exe	28

C:\Users\Admin\AppData\Local\Temp\HSBCPaymentAdvice.exe
"C:\Users\Admin\AppData\Local\Temp\HSBCPaymentAdvice.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2472
- C:\Program Files (x86)\windows mail\wab.exe
  "C:\Users\Admin\AppData\Local\Temp\HSBCPaymentAdvice.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2016

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

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:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
0e8c6bfe289e7cd1e6f24579f86d2f25

SHA1
3d1f5c4fd0353935017458f70bc260ef6a17063e

SHA256
c474569716a7bdc9012151cb53dbc871c496583c245b4b63f42d0721930ec4f4

SHA512
a73b8fc3adcece45433be61be4eba8d645584f23c5d123185b983c1a103150bbde8f88a984d50a4f8466f7a71fb37137a99d30f273c763197b2bc257d08415f6

Download Submit
C:\Users\Public\Pictures\Milliluxes.lnk

Filesize
1000B

MD5
fc9144f3418c48c000debba8711d136f

SHA1
33b1d97886d3eb5084ffe1886e4d3b69ebf3239d

SHA256
d18b0e1cafc71663fb9d35d7b14639bdbc1259028bbfdc8c7092686c822c0c25

SHA512
45647c66b91a5d0184753b14b944d4b4e0ed959d4b894536d0d0011bea1f08bd31f78bc6932c7ac63b2108912931ea6a6719c6df36e0e37d718e6b1851101b21

Download Submit
C:\Windows\SysWOW64\Dogmefastes.lnk

Filesize
1KB

MD5
d9a426b0601bd28177517b89de01b553

SHA1
dd7eb7b19a774f1f742dc8d918467937e6b0cb49

SHA256
404bdb411e5af99c3f216200f2e4aab8624bb81fcdb015dd2ed7cba664a72edc

SHA512
a955337633702e0808d3274d325c446f49ca32bcf5f95103896ce0c7d213950d87bc214012c73f8ddb6bc975a439ada436f996c54163d11a4d7a9af6dfa874c6

Download Submit
\Users\Admin\AppData\Local\Temp\nsz5295.tmp\LangDLL.dll

Filesize
5KB

MD5
f1e9eed02db3a822a7ddef0c724e5f1f

SHA1
65864992f5b6c79c5efbefb5b1354648a8a86709

SHA256
6dff504c6759c418c6635c9b25b8c91d0d9ef7787a3a93610d7670bb563c09df

SHA512
c22b64fff76b25cf53231b8636f07b361d95791c4646787ce7beac27ad6a0de88337dcceb25b5196f97c452dda72e2614647f51a8a18cb4d5228a82ed2e0780c

Download Submit
\Users\Admin\AppData\Local\Temp\nsz5295.tmp\System.dll

Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

Download Submit
memory/2016-645-0x0000000000270000-0x00000000012D2000-memory.dmp

Filesize
16.4MB

Download
memory/2016-651-0x0000000000270000-0x00000000012D2000-memory.dmp

Filesize
16.4MB

Download
memory/2016-648-0x0000000000270000-0x00000000012D2000-memory.dmp

Filesize
16.4MB

Download
memory/2016-636-0x0000000076F20000-0x00000000770C9000-memory.dmp

Filesize
1.7MB

Download
memory/2016-637-0x0000000000270000-0x00000000012D2000-memory.dmp

Filesize
16.4MB

Download
memory/2016-638-0x0000000000270000-0x00000000012D2000-memory.dmp

Filesize
16.4MB

Download
memory/2016-642-0x0000000000270000-0x00000000012D2000-memory.dmp

Filesize
16.4MB

Download
memory/2472-632-0x0000000003BA0000-0x0000000005DF9000-memory.dmp

Filesize
34.3MB

Download
memory/2472-643-0x0000000003BA0000-0x0000000005DF9000-memory.dmp

Filesize
34.3MB

Download
memory/2472-635-0x0000000076F20000-0x00000000770C9000-memory.dmp

Filesize
1.7MB

Download
memory/2472-634-0x0000000076F21000-0x0000000077022000-memory.dmp

Filesize
1.0MB

Download
memory/2472-633-0x0000000003BA0000-0x0000000005DF9000-memory.dmp

Filesize
34.3MB

Download

Analysis

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