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 11 IoCs

pid	Process
436	HSBCPaymentAdvice.exe
436	HSBCPaymentAdvice.exe
436	HSBCPaymentAdvice.exe
436	HSBCPaymentAdvice.exe
436	HSBCPaymentAdvice.exe
436	HSBCPaymentAdvice.exe
436	HSBCPaymentAdvice.exe
436	HSBCPaymentAdvice.exe
436	HSBCPaymentAdvice.exe
436	HSBCPaymentAdvice.exe
436	HSBCPaymentAdvice.exe

Drops file in System32 directory 3 IoCs

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

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3372	wab.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
436	HSBCPaymentAdvice.exe
3372	wab.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 436 set thread context of 3372	436	HSBCPaymentAdvice.exe	103

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\totlafholdenhedens\Sagittaries.ini	HSBCPaymentAdvice.exe
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

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
436	HSBCPaymentAdvice.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3372	wab.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 436 wrote to memory of 3372	436	HSBCPaymentAdvice.exe	103
PID 436 wrote to memory of 3372	436	HSBCPaymentAdvice.exe	103
PID 436 wrote to memory of 3372	436	HSBCPaymentAdvice.exe	103
PID 436 wrote to memory of 3372	436	HSBCPaymentAdvice.exe	103
PID 436 wrote to memory of 3372	436	HSBCPaymentAdvice.exe	103

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:436
- 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:3372

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4336,i,16316361669272684588,6171287487746154806,262144 --variations-seed-version --mojo-platform-channel-handle=4328 /prefetch:8
1⤵
PID:2512

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
decbf9b29fbb78ee4add35766f24a54b

SHA1
4463e36acf7020b2031e2dd1e3a002884f7c38b1

SHA256
b16c8b35827f65509115314374f89468859d997497269d165a0e0df09367f064

SHA512
93f807882d8df64fb057f54de7be2ada5536eca46a40da2f9d2c7de97dd9b276b478d12c7c7e2053ff9bb11d7924506b244c560b9dbe05577318f7b2c1d3ca2b

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsj67DF.tmp\LangDLL.dll

Filesize
5KB

MD5
f1e9eed02db3a822a7ddef0c724e5f1f

SHA1
65864992f5b6c79c5efbefb5b1354648a8a86709

SHA256
6dff504c6759c418c6635c9b25b8c91d0d9ef7787a3a93610d7670bb563c09df

SHA512
c22b64fff76b25cf53231b8636f07b361d95791c4646787ce7beac27ad6a0de88337dcceb25b5196f97c452dda72e2614647f51a8a18cb4d5228a82ed2e0780c

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsj67DF.tmp\System.dll

Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

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

Filesize
982B

MD5
0d664fcc75ce201ad783b5fc5785b726

SHA1
9e075824aa8d4c587e4b2e8609a576de5d702465

SHA256
0604c824959c46096ebb636b07c6611b804d01f91d41d3af6bd14ab82cc8ceca

SHA512
85ae841deacfc93ce5b779bfac6c410bd2912e8b176b4a233778b000532ad0fa722febe9aa12629801607cdf9eb9b68392d24723e8ea74a4d620379ca28cf53c

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

Filesize
1KB

MD5
9a7570a2ae3eb2aaff3b087334399664

SHA1
7e40ca29666f6069cdcbdd0ec21d9ecdcb88b582

SHA256
d249d44486121683a83b6578b1dd046a641202ceb7fb21b445e13448338fc867

SHA512
907a03a40319f8919ef3f436e9485923f3f392e08a8cea0495fbc7947955d105662dafee7bef9e34be792b210e957a498cd5fb37f6257e0081e59fde624b502d

Download Submit
memory/436-643-0x0000000004CA0000-0x0000000006EF9000-memory.dmp

Filesize
34.3MB

Download
memory/436-633-0x0000000004CA0000-0x0000000006EF9000-memory.dmp

Filesize
34.3MB

Download
memory/436-634-0x0000000004CA0000-0x0000000006EF9000-memory.dmp

Filesize
34.3MB

Download
memory/436-635-0x0000000076F51000-0x0000000077071000-memory.dmp

Filesize
1.1MB

Download
memory/436-636-0x0000000076F51000-0x0000000077071000-memory.dmp

Filesize
1.1MB

Download
memory/436-637-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/3372-644-0x0000000000B30000-0x0000000001D84000-memory.dmp

Filesize
18.3MB

Download
memory/3372-657-0x0000000000B30000-0x0000000001D84000-memory.dmp

Filesize
18.3MB

Download
memory/3372-645-0x0000000001D90000-0x0000000003FE9000-memory.dmp

Filesize
34.3MB

Download
memory/3372-648-0x0000000000B30000-0x0000000001D84000-memory.dmp

Filesize
18.3MB

Download
memory/3372-651-0x0000000000B30000-0x0000000001D84000-memory.dmp

Filesize
18.3MB

Download
memory/3372-638-0x0000000001D90000-0x0000000003FE9000-memory.dmp

Filesize
34.3MB

Download
memory/3372-654-0x0000000000B30000-0x0000000001D84000-memory.dmp

Filesize
18.3MB

Download
memory/3372-639-0x0000000000B30000-0x0000000001D84000-memory.dmp

Filesize
18.3MB

Download
memory/3372-660-0x0000000000B30000-0x0000000001D84000-memory.dmp

Filesize
18.3MB

Download
memory/3372-663-0x0000000000B30000-0x0000000001D84000-memory.dmp

Filesize
18.3MB

Download
memory/3372-666-0x0000000000B30000-0x0000000001D84000-memory.dmp

Filesize
18.3MB

Download
memory/3372-669-0x0000000000B30000-0x0000000001D84000-memory.dmp

Filesize
18.3MB

Download
memory/3372-672-0x0000000000B30000-0x0000000001D84000-memory.dmp

Filesize
18.3MB

Download
memory/3372-674-0x0000000000B30000-0x0000000001D84000-memory.dmp

Filesize
18.3MB

Download
memory/3372-677-0x0000000000B30000-0x0000000001D84000-memory.dmp

Filesize
18.3MB

Download

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