remcos | ad39a998b7f7b0889d74b2377b4ef09cb4827b314052e6280f2925bdc06ae248

General

Target

Order.exe
Size

809KB
MD5

8849e2039f215fdc3d18270bff047810
SHA1

b5276ad1f216f5de3d2edccfa598a0eaf676821f
SHA256

ad39a998b7f7b0889d74b2377b4ef09cb4827b314052e6280f2925bdc06ae248
SHA512

4779f5586c928f606185418f1320a8255598a122018230e547053afea09971d6aee80273c75e0ba26facea459a315ee53325104f5cf689067f04135aad4d7638
SSDEEP

24576:url6kD68JmlotQf4uvwKMXeDyEpyrX5WIYz8g3Q:Ml328U2yfxvwdgSrpkz3

Score

10^/10

remcos remotehost discovery rat upx

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

196.251.86.41:2404

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
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-83VOGC
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Countee.vbs	Countee.exe

Executes dropped EXE 1 IoCs

pid	Process
4680	Countee.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/1880-18-0x0000000000870000-0x0000000000A32000-memory.dmp	autoit_exe
behavioral1/memory/4680-40-0x0000000000BC0000-0x0000000000D82000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4680 set thread context of 2340	4680	Countee.exe	93

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/1880-0-0x0000000000870000-0x0000000000A32000-memory.dmp	upx
behavioral1/files/0x0012000000023e17-15.dat	upx
behavioral1/memory/4680-16-0x0000000000BC0000-0x0000000000D82000-memory.dmp	upx
behavioral1/memory/1880-18-0x0000000000870000-0x0000000000A32000-memory.dmp	upx
behavioral1/memory/4680-40-0x0000000000BC0000-0x0000000000D82000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 3 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	Order.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Countee.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4680	Countee.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
1880	Order.exe
1880	Order.exe
4680	Countee.exe
4680	Countee.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
1880	Order.exe
1880	Order.exe
4680	Countee.exe
4680	Countee.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1880 wrote to memory of 4680	1880	Order.exe	91
PID 1880 wrote to memory of 4680	1880	Order.exe	91
PID 1880 wrote to memory of 4680	1880	Order.exe	91
PID 4680 wrote to memory of 2340	4680	Countee.exe	93
PID 4680 wrote to memory of 2340	4680	Countee.exe	93
PID 4680 wrote to memory of 2340	4680	Countee.exe	93
PID 4680 wrote to memory of 2340	4680	Countee.exe	93

C:\Users\Admin\AppData\Local\Temp\Order.exe
"C:\Users\Admin\AppData\Local\Temp\Order.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1880
- C:\Users\Admin\AppData\Local\buncal\Countee.exe
  "C:\Users\Admin\AppData\Local\Temp\Order.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:4680
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\Order.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2340

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\flexuoseness

Filesize
56KB

MD5
9eab34dfcce1ba574cd3c88067264665

SHA1
d3026fb6a98e79973623f70690852873c757edbd

SHA256
28397000c0779d42ee2fa6c29ddd5c635cdf206d5296979e68e11197801afaf7

SHA512
79e6d2306b530de2bc8719b94947c3288e200661cf5bbeab0f65899cb5ccefcd753db76e03e41ae82dcbc709c008660ab9cd19c96b69fb8809b7a4b08c9bad25

Download Submit
C:\Users\Admin\AppData\Local\Temp\phagocytosed

Filesize
487KB

MD5
975d2f3e250eac84b67dbb5d8442acbc

SHA1
10498c75e31dfe70f4b165eb415beafb3c882a09

SHA256
b2bedca2b4226277849a88c0f3d965f022e40dad453549c6a2dff21813b5bf1c

SHA512
a2f40be8299ed633bd551ddd0b4609ce1c526daa5176a3b2fddfb90f6720e5e70b0e57006b389a15b7ce4d8881d35fe42b0caad4a561347f6d9a28a0bdad130f

Download Submit
C:\Users\Admin\AppData\Local\buncal\Countee.exe

Filesize
809KB

MD5
8849e2039f215fdc3d18270bff047810

SHA1
b5276ad1f216f5de3d2edccfa598a0eaf676821f

SHA256
ad39a998b7f7b0889d74b2377b4ef09cb4827b314052e6280f2925bdc06ae248

SHA512
4779f5586c928f606185418f1320a8255598a122018230e547053afea09971d6aee80273c75e0ba26facea459a315ee53325104f5cf689067f04135aad4d7638

Download Submit
memory/1880-12-0x00000000012A0000-0x00000000016A0000-memory.dmp

Filesize
4.0MB

Download
memory/1880-0-0x0000000000870000-0x0000000000A32000-memory.dmp

Filesize
1.8MB

Download
memory/1880-18-0x0000000000870000-0x0000000000A32000-memory.dmp

Filesize
1.8MB

Download
memory/2340-42-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-54-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-35-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-36-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-37-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-39-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-57-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-58-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-43-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-44-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-45-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-48-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-49-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-50-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-51-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-53-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-56-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2340-55-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4680-33-0x0000000001710000-0x0000000001B10000-memory.dmp

Filesize
4.0MB

Download
memory/4680-40-0x0000000000BC0000-0x0000000000D82000-memory.dmp

Filesize
1.8MB

Download
memory/4680-16-0x0000000000BC0000-0x0000000000D82000-memory.dmp

Filesize
1.8MB

Download

Analysis

Sharing