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

Executes dropped EXE 1 IoCs

pid	Process
2796	yava_vd.exe

Loads dropped DLL 2 IoCs

pid	Process
684	bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe
684	bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-D7NPY6 = "\"C:\\Users\\Admin\\AppData\\Roaming\\yava\\yava_vd.exe\""	bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\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

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

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 684 wrote to memory of 2796	684	bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe	30
PID 684 wrote to memory of 2796	684	bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe	30
PID 684 wrote to memory of 2796	684	bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe	30
PID 684 wrote to memory of 2796	684	bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe	30

C:\Users\Admin\AppData\Local\Temp\bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe
"C:\Users\Admin\AppData\Local\Temp\bc5291ee0d10c3c162be7663068790322127c781d1ed8789a847c140dd0075ad.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:684
- 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:2796

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

System Information Discovery

1

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/684-1-0x00000000006B0000-0x00000000007B0000-memory.dmp

Filesize
1024KB

Download
memory/684-2-0x0000000000230000-0x00000000002AA000-memory.dmp

Filesize
488KB

Download
memory/684-3-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/684-15-0x00000000006B0000-0x00000000007B0000-memory.dmp

Filesize
1024KB

Download
memory/684-14-0x0000000000230000-0x00000000002AA000-memory.dmp

Filesize
488KB

Download
memory/684-13-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/684-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2796-19-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/2796-18-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/2796-20-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/2796-22-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/2796-23-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/2796-24-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/2796-25-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/2796-26-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/2796-27-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download
memory/2796-28-0x0000000000400000-0x0000000000568000-memory.dmp

Filesize
1.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads