remcos | 75a14fd568ca466ad9c8ec045fa133798dc93fbc96cfc93a27bee766460ef7b6

Analysis

max time kernel
127s
max time network
176s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
14-10-2023 01:58

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General

Target

breakdown confirmation dk transport.exe
Size

331KB
MD5

ffb5942257739fbfae0945ac0abff87d
SHA1

a46905e807670eac4377a7d85d6be997bb369fa2
SHA256

75a14fd568ca466ad9c8ec045fa133798dc93fbc96cfc93a27bee766460ef7b6
SHA512

6f9a56532af9763fc7b2da78507485c511c5495438507ab70dfb1f649e4c130d005bc22790e8fed19313206f56a034c198702f69c7f06b8b3e23a117425b17d8
SSDEEP

6144:0VGdx6xAZFn+coaljg+P6WHxYLMMAlbV0ZIwOkaMPuLOfu+dENnnbIAtdx4hj+x+:IyZFn+itXHx7MArgaVLOW+d8nbIA+kE

Score

10^/10

remcos crypted persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Crypted

ourt2949aslumes9.duckdns.org:2401

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
true
install_flag
false
keylog_crypt
false
keylog_file
paqlgkfs.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
ourvbpld-RBN2WW
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Processes:

breakdown confirmation dk transport.exewab.exe

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	breakdown confirmation dk transport.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	wab.exe

Loads dropped DLL 7 IoCs

Processes:

breakdown confirmation dk transport.exe

pid	process
2336	breakdown confirmation dk transport.exe
2336	breakdown confirmation dk transport.exe
2336	breakdown confirmation dk transport.exe
2336	breakdown confirmation dk transport.exe
2336	breakdown confirmation dk transport.exe
2336	breakdown confirmation dk transport.exe
2336	breakdown confirmation dk transport.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

wab.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3027552071-446050021-1254071215-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Startup key = "C:\\Users\\Admin\\AppData\\Local\\Temp\\subfolder1\\Bumpy.exe"	wab.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

Processes:

wab.exe

pid process

4384 wab.exe
4384 wab.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

breakdown confirmation dk transport.exewab.exe

pid process

2336 breakdown confirmation dk transport.exe
4384 wab.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

breakdown confirmation dk transport.exe

description pid process target process

PID 2336 set thread context of 4384 2336 breakdown confirmation dk transport.exe wab.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

breakdown confirmation dk transport.exe

pid process

2336 breakdown confirmation dk transport.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

wab.exe

pid process

4384 wab.exe

pid	process
4384	wab.exe
4384	wab.exe

description	pid	process	target process
PID 2336 set thread context of 4384	2336	breakdown confirmation dk transport.exe	wab.exe

pid	process
4384	wab.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

breakdown confirmation dk transport.exe

description	pid	process	target process
PID 2336 wrote to memory of 4384	2336	breakdown confirmation dk transport.exe	wab.exe
PID 2336 wrote to memory of 4384	2336	breakdown confirmation dk transport.exe	wab.exe
PID 2336 wrote to memory of 4384	2336	breakdown confirmation dk transport.exe	wab.exe
PID 2336 wrote to memory of 4384	2336	breakdown confirmation dk transport.exe	wab.exe
PID 2336 wrote to memory of 4384	2336	breakdown confirmation dk transport.exe	wab.exe

C:\Users\Admin\AppData\Local\Temp\breakdown confirmation dk transport.exe
"C:\Users\Admin\AppData\Local\Temp\breakdown confirmation dk transport.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2336

C:\Program Files (x86)\windows mail\wab.exe
"C:\Users\Admin\AppData\Local\Temp\breakdown confirmation dk transport.exe"
2⤵
- Checks QEMU agent file
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
PID:4384

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nslEE1A.tmp\LangDLL.dll
Filesize
5KB

MD5
3dd80dff583544514eeb3a5ed851a519

SHA1
56f7324d9d4230c96d1963e7b3e02b05a6cf5c24

SHA256
86cff5eaca76c49f924cb123d242fdcfd45ab99c4b638d3b8f4a8cfb1970ab5b

SHA512
955f4df195b5d134449904e9020f80125cfb64d70d9482ff583451f3fcb10d15577ceac4180f71a96452d8478f6365160ab15731f9a79a494383087c9310fd1d

Download Submit
C:\Users\Admin\AppData\Local\Temp\nslEE1A.tmp\LangDLL.dll
Filesize
5KB

MD5
3dd80dff583544514eeb3a5ed851a519

SHA1
56f7324d9d4230c96d1963e7b3e02b05a6cf5c24

SHA256
86cff5eaca76c49f924cb123d242fdcfd45ab99c4b638d3b8f4a8cfb1970ab5b

SHA512
955f4df195b5d134449904e9020f80125cfb64d70d9482ff583451f3fcb10d15577ceac4180f71a96452d8478f6365160ab15731f9a79a494383087c9310fd1d

Download Submit
C:\Users\Admin\AppData\Local\Temp\nslEE1A.tmp\LangDLL.dll
Filesize
5KB

MD5
3dd80dff583544514eeb3a5ed851a519

SHA1
56f7324d9d4230c96d1963e7b3e02b05a6cf5c24

SHA256
86cff5eaca76c49f924cb123d242fdcfd45ab99c4b638d3b8f4a8cfb1970ab5b

SHA512
955f4df195b5d134449904e9020f80125cfb64d70d9482ff583451f3fcb10d15577ceac4180f71a96452d8478f6365160ab15731f9a79a494383087c9310fd1d

Download Submit
C:\Users\Admin\AppData\Local\Temp\nslEE1A.tmp\LangDLL.dll
Filesize
5KB

MD5
3dd80dff583544514eeb3a5ed851a519

SHA1
56f7324d9d4230c96d1963e7b3e02b05a6cf5c24

SHA256
86cff5eaca76c49f924cb123d242fdcfd45ab99c4b638d3b8f4a8cfb1970ab5b

SHA512
955f4df195b5d134449904e9020f80125cfb64d70d9482ff583451f3fcb10d15577ceac4180f71a96452d8478f6365160ab15731f9a79a494383087c9310fd1d

Download Submit
C:\Users\Admin\AppData\Local\Temp\nslEE1A.tmp\LangDLL.dll
Filesize
5KB

MD5
3dd80dff583544514eeb3a5ed851a519

SHA1
56f7324d9d4230c96d1963e7b3e02b05a6cf5c24

SHA256
86cff5eaca76c49f924cb123d242fdcfd45ab99c4b638d3b8f4a8cfb1970ab5b

SHA512
955f4df195b5d134449904e9020f80125cfb64d70d9482ff583451f3fcb10d15577ceac4180f71a96452d8478f6365160ab15731f9a79a494383087c9310fd1d

Download Submit
C:\Users\Admin\AppData\Local\Temp\nslEE1A.tmp\LangDLL.dll
Filesize
5KB

MD5
3dd80dff583544514eeb3a5ed851a519

SHA1
56f7324d9d4230c96d1963e7b3e02b05a6cf5c24

SHA256
86cff5eaca76c49f924cb123d242fdcfd45ab99c4b638d3b8f4a8cfb1970ab5b

SHA512
955f4df195b5d134449904e9020f80125cfb64d70d9482ff583451f3fcb10d15577ceac4180f71a96452d8478f6365160ab15731f9a79a494383087c9310fd1d

Download Submit
C:\Users\Admin\AppData\Local\Temp\nslEE1A.tmp\System.dll
Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
C:\Users\Admin\AppData\Local\Temp\nslEE1A.tmp\System.dll
Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
C:\Users\Admin\AppData\Local\Temp\nslEE1A.tmp\System.dll
Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
memory/2336-28-0x0000000077AA1000-0x0000000077BC1000-memory.dmp

Filesize
1.1MB

Download
memory/2336-29-0x0000000077AA1000-0x0000000077BC1000-memory.dmp

Filesize
1.1MB

Download
memory/2336-30-0x0000000074780000-0x0000000074786000-memory.dmp

Filesize
24KB

Download
memory/4384-31-0x0000000077B28000-0x0000000077B29000-memory.dmp

Filesize
4KB

Download
memory/4384-32-0x0000000077AA1000-0x0000000077BC1000-memory.dmp

Filesize
1.1MB

Download
memory/4384-37-0x0000000073280000-0x00000000744D4000-memory.dmp

Filesize
18.3MB

Download
memory/4384-38-0x0000000000F30000-0x0000000004C21000-memory.dmp

Filesize
60.9MB

Download
memory/4384-40-0x0000000073280000-0x00000000744D4000-memory.dmp

Filesize
18.3MB

Download
memory/4384-41-0x0000000073280000-0x00000000744D4000-memory.dmp

Filesize
18.3MB

Download
memory/4384-39-0x0000000000F30000-0x0000000004C21000-memory.dmp

Filesize
60.9MB

Download
memory/4384-42-0x0000000073280000-0x00000000744D4000-memory.dmp

Filesize
18.3MB

Download
memory/4384-43-0x0000000073280000-0x00000000744D4000-memory.dmp

Filesize
18.3MB

Download
memory/4384-44-0x0000000073280000-0x00000000744D4000-memory.dmp

Filesize
18.3MB

Download
memory/4384-45-0x0000000073280000-0x00000000744D4000-memory.dmp

Filesize
18.3MB

Download
memory/4384-46-0x0000000073280000-0x00000000744D4000-memory.dmp

Filesize
18.3MB

Download
memory/4384-47-0x0000000073280000-0x00000000744D4000-memory.dmp

Filesize
18.3MB

Download
memory/4384-48-0x0000000073280000-0x00000000744D4000-memory.dmp

Filesize
18.3MB

Download