remcos | 7efd9de26a438503b6d0bc112ed76e29db45c3341b4b82ad81556c6218ca37cd

General

Target

7efd9de26a438503b6d0bc112ed76e29db45c3341b4b82ad81556c6218ca37cd.exe
Size

136KB
MD5

b2232a781127819d4b424924bc07ad8d
SHA1

3635c05508b6d1deaf1fac2f3339ded446f84096
SHA256

7efd9de26a438503b6d0bc112ed76e29db45c3341b4b82ad81556c6218ca37cd
SHA512

5aa987d546741d0519903a78aa39932579f2a7a70d35764d770e46824ab80fb79d13780c4c2e9864faf49bcfd3c4ac665bb4bdb0a9466acda6a4bafa36ad8973
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKU:xPd4n/M+WLcilrpgGH/GwY87mVmIXha

Score

10^/10

remcos host persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

systemcontrol.ddns.net:45000

systemcontrol2.ddns.net:45000

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
OfficeUpgrade.exe
copy_folder
OfficeUpgrade
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
Upgrader.dat
keylog_flag
false
keylog_folder
Upgrader
keylog_path
%AppData%
mouse_option
false
mutex
req_khauflaoyr
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
OfficeUpgrade
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

detects Windows exceutables potentially bypassing UAC using eventvwr.exe 6 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1596-25-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral2/memory/1596-26-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral2/memory/1596-27-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral2/memory/1596-30-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral2/memory/1596-31-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral2/memory/1596-33-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

7efd9de26a438503b6d0bc112ed76e29db45c3341b4b82ad81556c6218ca37cd.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	7efd9de26a438503b6d0bc112ed76e29db45c3341b4b82ad81556c6218ca37cd.exe

Executes dropped EXE 2 IoCs

Processes:

wn2ra4ohzdr.exewn2ra4ohzdr.exe

pid process

1120 wn2ra4ohzdr.exe
1596 wn2ra4ohzdr.exe

pid	process
1120	wn2ra4ohzdr.exe
1596	wn2ra4ohzdr.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

7efd9de26a438503b6d0bc112ed76e29db45c3341b4b82ad81556c6218ca37cd.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	7efd9de26a438503b6d0bc112ed76e29db45c3341b4b82ad81556c6218ca37cd.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

wn2ra4ohzdr.exe

description pid process target process

PID 1120 set thread context of 1596 1120 wn2ra4ohzdr.exe wn2ra4ohzdr.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

wn2ra4ohzdr.exe

pid process

1596 wn2ra4ohzdr.exe

description	pid	process	target process
PID 1120 set thread context of 1596	1120	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe

pid	process
1596	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

7efd9de26a438503b6d0bc112ed76e29db45c3341b4b82ad81556c6218ca37cd.exewn2ra4ohzdr.exe

description	pid	process	target process
PID 2196 wrote to memory of 1120	2196	7efd9de26a438503b6d0bc112ed76e29db45c3341b4b82ad81556c6218ca37cd.exe	wn2ra4ohzdr.exe
PID 2196 wrote to memory of 1120	2196	7efd9de26a438503b6d0bc112ed76e29db45c3341b4b82ad81556c6218ca37cd.exe	wn2ra4ohzdr.exe
PID 2196 wrote to memory of 1120	2196	7efd9de26a438503b6d0bc112ed76e29db45c3341b4b82ad81556c6218ca37cd.exe	wn2ra4ohzdr.exe
PID 1120 wrote to memory of 1596	1120	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 1120 wrote to memory of 1596	1120	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 1120 wrote to memory of 1596	1120	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 1120 wrote to memory of 1596	1120	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 1120 wrote to memory of 1596	1120	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 1120 wrote to memory of 1596	1120	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 1120 wrote to memory of 1596	1120	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 1120 wrote to memory of 1596	1120	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe
PID 1120 wrote to memory of 1596	1120	wn2ra4ohzdr.exe	wn2ra4ohzdr.exe

C:\Users\Admin\AppData\Local\Temp\7efd9de26a438503b6d0bc112ed76e29db45c3341b4b82ad81556c6218ca37cd.exe
"C:\Users\Admin\AppData\Local\Temp\7efd9de26a438503b6d0bc112ed76e29db45c3341b4b82ad81556c6218ca37cd.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2196

C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
"C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1120

C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
"C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:1596

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 --no-appcompat-clear --mojo-platform-channel-handle=3496 --field-trial-handle=2236,i,5367110156796017614,12594004256180761011,262144 --variations-seed-version /prefetch:8
1⤵
PID:3708

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
Filesize
136KB

MD5
86744a207d75a4fb303ae1099cf36993

SHA1
b5e22aa493c74802ef93b55a622b255dfe46b92b

SHA256
2145a225a400441848a05492dd2bc1cd3054b436eea0f51a77bd40ae2aa92a86

SHA512
9ab8d000cc447fcc399ede482abd790ffd45a464b649d614811a7f8876a7d07afa8e46bb4499d3149ffed2d43e71692922825099b9350dbaa2445bc24c5bc6fe

Download Submit
memory/1120-35-0x00000000744B0000-0x0000000074C60000-memory.dmp

Filesize
7.7MB

Download
memory/1120-21-0x0000000005170000-0x0000000005180000-memory.dmp

Filesize
64KB

Download
memory/1120-20-0x00000000744B0000-0x0000000074C60000-memory.dmp

Filesize
7.7MB

Download
memory/1596-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1596-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1596-33-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1596-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1596-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1596-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1596-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2196-16-0x00000000744B0000-0x0000000074C60000-memory.dmp

Filesize
7.7MB

Download
memory/2196-23-0x00000000744B0000-0x0000000074C60000-memory.dmp

Filesize
7.7MB

Download
memory/2196-2-0x00000000057F0000-0x0000000005D94000-memory.dmp

Filesize
5.6MB

Download
memory/2196-3-0x0000000005240000-0x00000000052D2000-memory.dmp

Filesize
584KB

Download
memory/2196-0-0x00000000744B0000-0x0000000074C60000-memory.dmp

Filesize
7.7MB

Download
memory/2196-5-0x00000000051E0000-0x00000000051EA000-memory.dmp

Filesize
40KB

Download
memory/2196-4-0x0000000005200000-0x0000000005210000-memory.dmp

Filesize
64KB

Download
memory/2196-6-0x0000000005760000-0x0000000005780000-memory.dmp

Filesize
128KB

Download
memory/2196-1-0x00000000007B0000-0x00000000007D8000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads