remcos | 7fce076ae6458c561dcb1e5cd6a1de47aa114d5758dc791f0a94402ac4a9f2ee

Analysis

max time kernel
146s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
03-12-2024 14:18

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General

Target

7fce076ae6458c561dcb1e5cd6a1de47aa114d5758dc791f0a94402ac4a9f2ee.exe
Size

455KB
MD5

60e18d4606431a33c406c1ad21ddc4e2
SHA1

f8e773f104fcfd6df48ee21591ce8890fd8942c5
SHA256

7fce076ae6458c561dcb1e5cd6a1de47aa114d5758dc791f0a94402ac4a9f2ee
SHA512

00c74a249be8ac164be201161aceb35e272f007e65ea6d740043ba89a55a69b7a01283d50fd446e774df05f869d9d6418f8d82fff5422133a36bebc2f8faf22e
SSDEEP

6144:sPm7KDoBlJL4vhsEAC7rWzLKmVn4RIM0EeNXWizh/Kkc6k4qHVWO1XO/gvJ/j:IELksjq0KmFbEeJN1Kkc6xqHVlVj

Score

10^/10

remcos yavakosa discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Yavakosa

198.23.227.212:32583

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
yava_vd.exe
copy_folder
yava
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-D7NPY6
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

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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	7fce076ae6458c561dcb1e5cd6a1de47aa114d5758dc791f0a94402ac4a9f2ee.exe

Executes dropped EXE 1 IoCs

pid	Process
1588	yava_vd.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-D7NPY6 = "\"C:\\Users\\Admin\\AppData\\Roaming\\yava\\yava_vd.exe\""	7fce076ae6458c561dcb1e5cd6a1de47aa114d5758dc791f0a94402ac4a9f2ee.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-D7NPY6 = "\"C:\\Users\\Admin\\AppData\\Roaming\\yava\\yava_vd.exe\""	yava_vd.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 28 IoCs

pid	pid_target	Process	procid_target
3736	2652	WerFault.exe	81
2248	2652	WerFault.exe	81
1984	2652	WerFault.exe	81
348	2652	WerFault.exe	81
1936	2652	WerFault.exe	81
1456	2652	WerFault.exe	81
3780	2652	WerFault.exe	81
5000	1588	WerFault.exe	95
4200	1588	WerFault.exe	95
4836	1588	WerFault.exe	95
3564	1588	WerFault.exe	95
2732	1588	WerFault.exe	95
4564	1588	WerFault.exe	95
5020	1588	WerFault.exe	95
3944	1588	WerFault.exe	95
2912	1588	WerFault.exe	95
1660	1588	WerFault.exe	95
1668	1588	WerFault.exe	95
2456	1588	WerFault.exe	95
1904	1588	WerFault.exe	95
2748	1588	WerFault.exe	95
2692	1588	WerFault.exe	95
2728	1588	WerFault.exe	95
1924	1588	WerFault.exe	95
4732	1588	WerFault.exe	95
4536	1588	WerFault.exe	95
4036	1588	WerFault.exe	95
4912	1588	WerFault.exe	95

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	7fce076ae6458c561dcb1e5cd6a1de47aa114d5758dc791f0a94402ac4a9f2ee.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yava_vd.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2652 wrote to memory of 1588	2652	7fce076ae6458c561dcb1e5cd6a1de47aa114d5758dc791f0a94402ac4a9f2ee.exe	95
PID 2652 wrote to memory of 1588	2652	7fce076ae6458c561dcb1e5cd6a1de47aa114d5758dc791f0a94402ac4a9f2ee.exe	95
PID 2652 wrote to memory of 1588	2652	7fce076ae6458c561dcb1e5cd6a1de47aa114d5758dc791f0a94402ac4a9f2ee.exe	95

C:\Users\Admin\AppData\Local\Temp\7fce076ae6458c561dcb1e5cd6a1de47aa114d5758dc791f0a94402ac4a9f2ee.exe
"C:\Users\Admin\AppData\Local\Temp\7fce076ae6458c561dcb1e5cd6a1de47aa114d5758dc791f0a94402ac4a9f2ee.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2652
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2652 -s 996
  2⤵
  - Program crash
  PID:3736
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2652 -s 996
  2⤵
  - Program crash
  PID:2248
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2652 -s 1184
  2⤵
  - Program crash
  PID:1984
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2652 -s 1000
  2⤵
  - Program crash
  PID:348
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2652 -s 1204
  2⤵
  - Program crash
  PID:1936
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2652 -s 1172
  2⤵
  - Program crash
  PID:1456
- C:\Users\Admin\AppData\Roaming\yava\yava_vd.exe
  "C:\Users\Admin\AppData\Roaming\yava\yava_vd.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  PID:1588
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 684
    3⤵
    - Program crash
    PID:5000
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 712
    3⤵
    - Program crash
    PID:4200
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 740
    3⤵
    - Program crash
    PID:4836
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 776
    3⤵
    - Program crash
    PID:3564
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 792
    3⤵
    - Program crash
    PID:2732
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 948
    3⤵
    - Program crash
    PID:4564
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 988
    3⤵
    - Program crash
    PID:5020
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 988
    3⤵
    - Program crash
    PID:3944
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 948
    3⤵
    - Program crash
    PID:2912
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 1088
    3⤵
    - Program crash
    PID:1660
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 1304
    3⤵
    - Program crash
    PID:1668
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 800
    3⤵
    - Program crash
    PID:2456
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 1452
    3⤵
    - Program crash
    PID:1904
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 1284
    3⤵
    - Program crash
    PID:2748
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 1460
    3⤵
    - Program crash
    PID:2692
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 1268
    3⤵
    - Program crash
    PID:2728
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 1256
    3⤵
    - Program crash
    PID:1924
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 1284
    3⤵
    - Program crash
    PID:4732
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 1412
    3⤵
    - Program crash
    PID:4536
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 1284
    3⤵
    - Program crash
    PID:4036
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 944
    3⤵
    - Program crash
    PID:4912
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2652 -s 1240
  2⤵
  - Program crash
  PID:3780

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2652 -ip 2652
1⤵
PID:3708

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2652 -ip 2652
1⤵
PID:3148

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 2652 -ip 2652
1⤵
PID:624

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 2652 -ip 2652
1⤵
PID:2552

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 2652 -ip 2652
1⤵
PID:1848

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 2652 -ip 2652
1⤵
PID:2404

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2652 -ip 2652
1⤵
PID:3000

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1588 -ip 1588
1⤵
PID:2208

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 1588 -ip 1588
1⤵
PID:3252

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1588 -ip 1588
1⤵
PID:1540

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 1588 -ip 1588
1⤵
PID:412

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 1588 -ip 1588
1⤵
PID:4652

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 1588 -ip 1588
1⤵
PID:3476

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 1588 -ip 1588
1⤵
PID:4460

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 1588 -ip 1588
1⤵
PID:4500

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 1588 -ip 1588
1⤵
PID:1016

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 1588 -ip 1588
1⤵
PID:4716

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 1588 -ip 1588
1⤵
PID:1852

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 1588 -ip 1588
1⤵
PID:4304

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 1588 -ip 1588
1⤵
PID:4968

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 1588 -ip 1588
1⤵
PID:736

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 384 -p 1588 -ip 1588
1⤵
PID:5044

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 1588 -ip 1588
1⤵
PID:3948

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 1588 -ip 1588
1⤵
PID:1952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1588 -ip 1588
1⤵
PID:2068

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1588 -ip 1588
1⤵
PID:1164

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 384 -p 1588 -ip 1588
1⤵
PID:2880

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 1588 -ip 1588
1⤵
PID:1052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\yava\yava_vd.exe

Filesize
455KB

MD5
60e18d4606431a33c406c1ad21ddc4e2

SHA1
f8e773f104fcfd6df48ee21591ce8890fd8942c5

SHA256
7fce076ae6458c561dcb1e5cd6a1de47aa114d5758dc791f0a94402ac4a9f2ee

SHA512
00c74a249be8ac164be201161aceb35e272f007e65ea6d740043ba89a55a69b7a01283d50fd446e774df05f869d9d6418f8d82fff5422133a36bebc2f8faf22e

Download Submit
memory/1588-28-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-30-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-23-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-35-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-24-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-34-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-16-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-25-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-18-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-20-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-21-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-22-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-33-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-32-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-17-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-26-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-27-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-31-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/1588-29-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/2652-3-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2652-1-0x0000000002C40000-0x0000000002D40000-memory.dmp

Filesize
1024KB

Download
memory/2652-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2652-2-0x0000000003010000-0x000000000308A000-memory.dmp

Filesize
488KB

Download
memory/2652-12-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/2652-13-0x0000000003010000-0x000000000308A000-memory.dmp

Filesize
488KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads