remcos | a8e552944846a2f5e8fefea4a250046da29d74d1f58f7a868258e6ded9597958

General

Target

a8e552944846a2f5e8fefea4a250046da29d74d1f58f7a868258e6ded9597958.exe
Size

4.6MB
MD5

25860926414bf43383246f7c773a8d6c
SHA1

760390a4a14df085f4c841067f52c79409cdc93e
SHA256

a8e552944846a2f5e8fefea4a250046da29d74d1f58f7a868258e6ded9597958
SHA512

61825ef1b03f5516f2820faae3dad01911054debb714b2162fd28cdc7c26199eb6174eddb3e48a4b200c350a083a561a58bd2724496fcb71e87d4492e2ec5a07
SSDEEP

98304:+pbYDHaUeRG/GnYDievJRVrQo4QGB0s53+sTH7/93veWGLRHHk:+pbu9e+qYDiQf1hfGWsBVb/rGLhE

Score

10^/10

remcos back-september discovery rat

Malware Config

Extracted

Family

remcos

Botnet

Back-September

C2

fullimmersion777.com:8090

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
hello.exe
copy_folder
windw
delete_file
false
hide_file
true
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
rimcsl-94LESJ
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

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	a8e552944846a2f5e8fefea4a250046da29d74d1f58f7a868258e6ded9597958.exe

Executes dropped EXE 2 IoCs

pid	Process
4992	DZIPR.exe
1808	DZIPR.exe

Loads dropped DLL 2 IoCs

pid	Process
4992	DZIPR.exe
1808	DZIPR.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1808 set thread context of 3564	1808	DZIPR.exe	84

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\lnfast_x64.job	cmd.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 5 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a8e552944846a2f5e8fefea4a250046da29d74d1f58f7a868258e6ded9597958.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DZIPR.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DZIPR.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
4992	DZIPR.exe
1808	DZIPR.exe
1808	DZIPR.exe
3564	cmd.exe
3564	cmd.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
1808	DZIPR.exe
3564	cmd.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4952 wrote to memory of 4992	4952	a8e552944846a2f5e8fefea4a250046da29d74d1f58f7a868258e6ded9597958.exe	82
PID 4952 wrote to memory of 4992	4952	a8e552944846a2f5e8fefea4a250046da29d74d1f58f7a868258e6ded9597958.exe	82
PID 4952 wrote to memory of 4992	4952	a8e552944846a2f5e8fefea4a250046da29d74d1f58f7a868258e6ded9597958.exe	82
PID 4992 wrote to memory of 1808	4992	DZIPR.exe	83
PID 4992 wrote to memory of 1808	4992	DZIPR.exe	83
PID 4992 wrote to memory of 1808	4992	DZIPR.exe	83
PID 1808 wrote to memory of 3564	1808	DZIPR.exe	84
PID 1808 wrote to memory of 3564	1808	DZIPR.exe	84
PID 1808 wrote to memory of 3564	1808	DZIPR.exe	84
PID 1808 wrote to memory of 3564	1808	DZIPR.exe	84
PID 3564 wrote to memory of 2724	3564	cmd.exe	95
PID 3564 wrote to memory of 2724	3564	cmd.exe	95
PID 3564 wrote to memory of 2724	3564	cmd.exe	95
PID 3564 wrote to memory of 2724	3564	cmd.exe	95
PID 3564 wrote to memory of 2724	3564	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\a8e552944846a2f5e8fefea4a250046da29d74d1f58f7a868258e6ded9597958.exe
"C:\Users\Admin\AppData\Local\Temp\a8e552944846a2f5e8fefea4a250046da29d74d1f58f7a868258e6ded9597958.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4952
- C:\Users\Admin\DZIPR.exe
  "C:\Users\Admin\DZIPR.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4992
- - C:\Users\Admin\AppData\Roaming\Ruy_driverv2\DZIPR.exe
    C:\Users\Admin\AppData\Roaming\Ruy_driverv2\DZIPR.exe
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:1808
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\SysWOW64\cmd.exe
      4⤵
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:3564
    - - C:\Windows\SysWOW64\explorer.exe
        
        C:\Windows\SysWOW64\explorer.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2724

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\5433df25

Filesize
1.2MB

MD5
2270c9007533db5d4ec79b9c1db5f807

SHA1
1839f6915ab7d6f88ac792919957d48e67d77c9c

SHA256
bce7810ee8d4f288cf6c6fb3d4a70cb86c6c0813be6cd14883a002a01616dbb4

SHA512
616d0ee8489bb21f13b8ae0c3ca4d0d498abb78dba61e80e86b97ee7b61925907846211c296891886b18b2e3c48e81351edb90d2baacbf89ad5b1edceebd0981

Download Submit
C:\Users\Admin\DZIPR.dll

Filesize
346KB

MD5
ad28d4167571382569d2384ffd7bd2a9

SHA1
efc7534bcb1645d4056702e073519f571d8db77b

SHA256
f919a8e63ec0f2f05ac01a6cab4088c13fbf14a38b071cfa9f710c9e069462eb

SHA512
8f28867b46dd7a801cbf70d8d7fe5f2bfb8654a417c40ba264faf81af8bb1a28e1a1200fdc9828a4a4c6df0a13817055290c16f9468d311b8d8049a2439348d9

Download Submit
C:\Users\Admin\DZIPR.exe

Filesize
8.4MB

MD5
ec9ce1d67f98072281015c7726fba245

SHA1
e89b16265acf4a251b527ddf22830f2650987263

SHA256
9ab4145d5525ae741b80f4e66f505abba59adcbe01868dfef84fbe4450634cc1

SHA512
21db8f3ae325021589de9c2489ab2ce6814722a17a92476a56147478aa9767ce5c4769169f287060cc08ad76019178ba547fcef32074ef1afb1926845e7158e1

Download Submit
C:\Users\Admin\ekqqtq

Filesize
952KB

MD5
4649f3a4e58c6040b07f6d486c149a71

SHA1
64f8fc631c5fb4e5f6bc20c207047d8e2b500587

SHA256
5d81ca77492946aa2cfe00349342de8cceb317d8649bedbfd95992dca885f184

SHA512
4e1b229d30403b594e992fe0893e568161c8d901fe20461093d11159ab03b5dd410d1834bc64ac4ccc39d4f6b072946703f06eeb982d79b1c9a1b773b57013b7

Download Submit
C:\Users\Admin\ipqtwm

Filesize
70KB

MD5
f125e72b3968ca233ef3c7e2f4db34e7

SHA1
4fb34044ef18cedbd3ede4272c44416d3f11735c

SHA256
ced30560c6c0fc15cbdbdbc0d480dca6b41ce3183057e43b419dd6814a33db92

SHA512
b645d1eb685a69b9ca9bbdb1f4638af8ae151ddfb9527c423f7779971246ed60f981ce26ce8af2fc7b63164e7c13e9c6e98a7f148831a1e59318e60e5a39f881

Download Submit
memory/1808-56-0x0000000075693000-0x0000000075695000-memory.dmp

Filesize
8KB

Download
memory/1808-58-0x0000000075680000-0x00000000757FB000-memory.dmp

Filesize
1.5MB

Download
memory/1808-54-0x0000000075680000-0x00000000757FB000-memory.dmp

Filesize
1.5MB

Download
memory/1808-55-0x00007FFDC03D0000-0x00007FFDC05C5000-memory.dmp

Filesize
2.0MB

Download
memory/1808-57-0x0000000075680000-0x00000000757FB000-memory.dmp

Filesize
1.5MB

Download
memory/2724-75-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/2724-77-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/2724-81-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/2724-80-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/2724-79-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/2724-78-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/2724-69-0x00007FFDC03D0000-0x00007FFDC05C5000-memory.dmp

Filesize
2.0MB

Download
memory/2724-70-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/2724-72-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/2724-73-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/2724-74-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/2724-76-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/3564-67-0x0000000075680000-0x00000000757FB000-memory.dmp

Filesize
1.5MB

Download
memory/3564-64-0x0000000075680000-0x00000000757FB000-memory.dmp

Filesize
1.5MB

Download
memory/3564-62-0x00007FFDC03D0000-0x00007FFDC05C5000-memory.dmp

Filesize
2.0MB

Download
memory/4992-40-0x0000000073C90000-0x0000000073E0B000-memory.dmp

Filesize
1.5MB

Download
memory/4992-47-0x0000000000400000-0x0000000000C69000-memory.dmp

Filesize
8.4MB

Download
memory/4992-41-0x00007FFDC03D0000-0x00007FFDC05C5000-memory.dmp

Filesize
2.0MB

Download

Analysis

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