remcos | bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad

General

Target

bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe
Size

436KB
MD5

347bc8ce26d1a2f12714c11f3dacdd86
SHA1

b9bf9b6161ab9a59f733c6b258a5e0977ea96f72
SHA256

bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad
SHA512

76b9ed3e398f64948643e127a8f8f9c654777995ff90cbcc58ab69c7134cf53c6c63861cd79aa5ed3eea077a1f0de6a9877708e8461cd243a3334432dcf53254
SSDEEP

12288:CtmEp/dzYtn6c1Ts8ovJlgC2PNBxqe8Ke3:QdzYd6c1TAvfgxxt8N

Score

10^/10

remcos yavakosa discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Yavakosa

C2

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

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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe

Executes dropped EXE 1 IoCs

pid	Process
1064	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-1-5-21-656926755-4116854191-210765258-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-D7NPY6 = "\"C:\\Users\\Admin\\AppData\\Roaming\\yava\\yava_vd.exe\""	bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\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 23 IoCs

pid	pid_target	Process	procid_target
2360	3744	WerFault.exe	83
956	3744	WerFault.exe	83
1464	3744	WerFault.exe	83
3304	3744	WerFault.exe	83
1860	3744	WerFault.exe	83
1460	3744	WerFault.exe	83
4964	3744	WerFault.exe	83
4564	1064	WerFault.exe	97
636	1064	WerFault.exe	97
5032	1064	WerFault.exe	97
4972	1064	WerFault.exe	97
3508	1064	WerFault.exe	97
2956	1064	WerFault.exe	97
4480	1064	WerFault.exe	97
2256	1064	WerFault.exe	97
3272	1064	WerFault.exe	97
1256	1064	WerFault.exe	97
2856	1064	WerFault.exe	97
3172	1064	WerFault.exe	97
4192	1064	WerFault.exe	97
4668	1064	WerFault.exe	97
4048	1064	WerFault.exe	97
1096	1064	WerFault.exe	97

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	yava_vd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3744 wrote to memory of 1064	3744	bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe	97
PID 3744 wrote to memory of 1064	3744	bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe	97
PID 3744 wrote to memory of 1064	3744	bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe	97

C:\Users\Admin\AppData\Local\Temp\bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe
"C:\Users\Admin\AppData\Local\Temp\bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3744
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3744 -s 1012
  2⤵
  - Program crash
  PID:2360
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3744 -s 1048
  2⤵
  - Program crash
  PID:956
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3744 -s 1160
  2⤵
  - Program crash
  PID:1464
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3744 -s 1036
  2⤵
  - Program crash
  PID:3304
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3744 -s 1188
  2⤵
  - Program crash
  PID:1860
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3744 -s 1180
  2⤵
  - Program crash
  PID:1460
- 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:1064
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 668
    3⤵
    - Program crash
    PID:4564
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 672
    3⤵
    - Program crash
    PID:636
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 748
    3⤵
    - Program crash
    PID:5032
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 784
    3⤵
    - Program crash
    PID:4972
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 796
    3⤵
    - Program crash
    PID:3508
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 948
    3⤵
    - Program crash
    PID:2956
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 988
    3⤵
    - Program crash
    PID:4480
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 1008
    3⤵
    - Program crash
    PID:2256
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 980
    3⤵
    - Program crash
    PID:3272
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 1016
    3⤵
    - Program crash
    PID:1256
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 1264
    3⤵
    - Program crash
    PID:2856
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 684
    3⤵
    - Program crash
    PID:3172
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 884
    3⤵
    - Program crash
    PID:4192
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 1304
    3⤵
    - Program crash
    PID:4668
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 1372
    3⤵
    - Program crash
    PID:4048
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 1320
    3⤵
    - Program crash
    PID:1096
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3744 -s 996
  2⤵
  - Program crash
  PID:4964

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3744 -ip 3744
1⤵
PID:1916

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3744 -ip 3744
1⤵
PID:1832

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 3744 -ip 3744
1⤵
PID:4852

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3744 -ip 3744
1⤵
PID:2448

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 3744 -ip 3744
1⤵
PID:3236

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 3744 -ip 3744
1⤵
PID:2716

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3744 -ip 3744
1⤵
PID:2968

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 1064 -ip 1064
1⤵
PID:2896

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 1064 -ip 1064
1⤵
PID:1232

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1064 -ip 1064
1⤵
PID:2736

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 1064 -ip 1064
1⤵
PID:1708

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 1064 -ip 1064
1⤵
PID:4832

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 1064 -ip 1064
1⤵
PID:3688

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 1064 -ip 1064
1⤵
PID:2728

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 1064 -ip 1064
1⤵
PID:3608

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 1064 -ip 1064
1⤵
PID:4688

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1064 -ip 1064
1⤵
PID:3060

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 1064 -ip 1064
1⤵
PID:1876

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 1064 -ip 1064
1⤵
PID:2564

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1064 -ip 1064
1⤵
PID:412

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 1064 -ip 1064
1⤵
PID:4576

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 1064 -ip 1064
1⤵
PID:3816

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 1064 -ip 1064
1⤵
PID:3076

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

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\Roaming\yava\yava_vd.exe

Filesize
436KB

MD5
347bc8ce26d1a2f12714c11f3dacdd86

SHA1
b9bf9b6161ab9a59f733c6b258a5e0977ea96f72

SHA256
bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad

SHA512
76b9ed3e398f64948643e127a8f8f9c654777995ff90cbcc58ab69c7134cf53c6c63861cd79aa5ed3eea077a1f0de6a9877708e8461cd243a3334432dcf53254

Download Submit
memory/1064-22-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/1064-21-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/1064-26-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/1064-25-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/1064-24-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/1064-23-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/1064-16-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/1064-20-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/1064-18-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/1064-17-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/3744-3-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3744-1-0x0000000000600000-0x0000000000700000-memory.dmp

Filesize
1024KB

Download
memory/3744-12-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/3744-13-0x00000000022B0000-0x000000000232A000-memory.dmp

Filesize
488KB

Download
memory/3744-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3744-2-0x00000000022B0000-0x000000000232A000-memory.dmp

Filesize
488KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads