guloader | ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba

General

Target

ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.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
2072	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe
2072	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe
2072	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe
2072	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe
2072	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe
2072	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe
2072	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\spankingerne\Vidnesbyrd.Syn106	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe
File created	C:\Windows\SysWOW64\Dogmefastes.lnk	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe
File opened for modification	C:\Windows\SysWOW64\Dogmefastes.lnk	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2468	wab.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2072	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe
2468	wab.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2072 set thread context of 2468	2072	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe	29

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\eudaemons.ini	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\Opkomlinge\undersluice.yed	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe
File opened for modification	C:\Windows\resources\lizis\seadromes.ett	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe
File opened for modification	C:\Windows\resources\sygelejet\devested.per	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe
File opened for modification	C:\Windows\totlafholdenhedens\Sagittaries.ini	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.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	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wab.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2072	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2468	wab.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2072 wrote to memory of 2468	2072	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe	29
PID 2072 wrote to memory of 2468	2072	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe	29
PID 2072 wrote to memory of 2468	2072	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe	29
PID 2072 wrote to memory of 2468	2072	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe	29
PID 2072 wrote to memory of 2468	2072	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe	29
PID 2072 wrote to memory of 2468	2072	ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe	29

C:\Users\Admin\AppData\Local\Temp\ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe
"C:\Users\Admin\AppData\Local\Temp\ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.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:2072
- C:\Program Files (x86)\windows mail\wab.exe
  "C:\Users\Admin\AppData\Local\Temp\ab4df763c5581670d4163462003abad97e8a309fa976fb0d840f44bdd17db7ba.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2468

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
da051b41c15772fa697bd936b8b2bd24

SHA1
7eb44f005005c3d20f43c9e920b24367f789b4dc

SHA256
4bcc1cd87baf7e642ce14ff8b8097d3e5290241c2b603e8c3ed7f26d62bbf7f4

SHA512
28d56608d3f2715fce0ca401d20857a5a4e55ca08d519c61abb77a03417e529a49e45d67c3da55402c8906849295aa21aea1d153956cc8b288b52034df7b2e74

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

Filesize
996B

MD5
50bb577896fb0b724957302a2483dab3

SHA1
8f79346718490d1d20e7fce74dce18f58ba9def3

SHA256
a16c8eab557a564582dea1c7978e5390eea5576c2539bf91d52e4767e79b78af

SHA512
2adf919646f0040fd71242bc570f5f4fc40a27d5e46279393d1a173354966b72ffe7399509bb7b17e3a7eee80d068da500872a0a6849e53f7167f1dfbcb9e0c8

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

Filesize
1KB

MD5
ffe035c81a0aa6c88c2153adb2eba78f

SHA1
93a4844088995342bb4b6c7444ed025fa15e0655

SHA256
9cf9bee9a85f081d53233780541044d214e7fdd75fce8e8cc2f50edbe91aff05

SHA512
bcf714a7cec73dee8acc9e43bda0cb2553456d1c3f34f86e74be0848306b22643ade2b6a54decd9d269046cb76e35aefbd509e2c927b2b742515b62924ed80c7

Download Submit
\Users\Admin\AppData\Local\Temp\nseE4A6.tmp\LangDLL.dll

Filesize
5KB

MD5
f1e9eed02db3a822a7ddef0c724e5f1f

SHA1
65864992f5b6c79c5efbefb5b1354648a8a86709

SHA256
6dff504c6759c418c6635c9b25b8c91d0d9ef7787a3a93610d7670bb563c09df

SHA512
c22b64fff76b25cf53231b8636f07b361d95791c4646787ce7beac27ad6a0de88337dcceb25b5196f97c452dda72e2614647f51a8a18cb4d5228a82ed2e0780c

Download Submit
\Users\Admin\AppData\Local\Temp\nseE4A6.tmp\System.dll

Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

Download Submit
memory/2072-642-0x00000000042E0000-0x0000000006539000-memory.dmp

Filesize
34.3MB

Download
memory/2072-632-0x00000000042E0000-0x0000000006539000-memory.dmp

Filesize
34.3MB

Download
memory/2072-633-0x00000000042E0000-0x0000000006539000-memory.dmp

Filesize
34.3MB

Download
memory/2072-635-0x0000000076E90000-0x0000000077039000-memory.dmp

Filesize
1.7MB

Download
memory/2072-634-0x0000000076E91000-0x0000000076F92000-memory.dmp

Filesize
1.0MB

Download
memory/2468-644-0x0000000000BA0000-0x0000000001C02000-memory.dmp

Filesize
16.4MB

Download
memory/2468-656-0x0000000000BA0000-0x0000000001C02000-memory.dmp

Filesize
16.4MB

Download
memory/2468-637-0x0000000000BA0000-0x0000000001C02000-memory.dmp

Filesize
16.4MB

Download
memory/2468-647-0x0000000000BA0000-0x0000000001C02000-memory.dmp

Filesize
16.4MB

Download
memory/2468-636-0x0000000076E90000-0x0000000077039000-memory.dmp

Filesize
1.7MB

Download
memory/2468-650-0x0000000000BA0000-0x0000000001C02000-memory.dmp

Filesize
16.4MB

Download
memory/2468-653-0x0000000000BA0000-0x0000000001C02000-memory.dmp

Filesize
16.4MB

Download
memory/2468-641-0x0000000000BA0000-0x0000000001C02000-memory.dmp

Filesize
16.4MB

Download
memory/2468-659-0x0000000000BA0000-0x0000000001C02000-memory.dmp

Filesize
16.4MB

Download
memory/2468-662-0x0000000000BA0000-0x0000000001C02000-memory.dmp

Filesize
16.4MB

Download
memory/2468-665-0x0000000000BA0000-0x0000000001C02000-memory.dmp

Filesize
16.4MB

Download
memory/2468-668-0x0000000000BA0000-0x0000000001C02000-memory.dmp

Filesize
16.4MB

Download
memory/2468-671-0x0000000000BA0000-0x0000000001C02000-memory.dmp

Filesize
16.4MB

Download
memory/2468-674-0x0000000000BA0000-0x0000000001C02000-memory.dmp

Filesize
16.4MB

Download
memory/2468-677-0x0000000000BA0000-0x0000000001C02000-memory.dmp

Filesize
16.4MB

Download

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