remcos | 7bd46b7c65926d301ef6d867258e13c68e9f6c8fc721cc541cf084aa0df47133

Analysis

max time kernel
163s
max time network
160s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
19/11/2022, 04:30

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General

Target
a5d90c7d3e393ee48132480fca1532cf.exe
Size 2.3MB
Sample221119-e4tcgadf29
SHA256 7bd46b7c65926d301ef6d867258e13c68e9f6c8fc721cc541cf084aa0df47133
MD5 a5d90c7d3e393ee48132480fca1532cf
SHA1 7c533f9f322a6efd50de5e1c3551571eccf0f408
SHA512 0e5b577e128dfc20878737e7cace196e9e8cd9784d3451162aaf6cb577efd0c96d96bed9b2e158e14f67de96697c6eca1ad0706fb20481d09c8a071afdd78912
SSDEEP 49152:8Uscf2YXnRNaqzu2yghkAwwpLTKrRMVl4pVYW17x:K8LD7pXWMTy17x
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos freestyle persistence rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

freestyle

107.174.202.148:14207

Attributes

audio_folder
MicRecords
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-VWYDEN
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/628-157-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/628-160-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 4 IoCs

resource	yara_rule
behavioral2/memory/628-157-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/1288-158-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/1288-159-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/628-160-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	a5d90c7d3e393ee48132480fca1532cf.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Fiyjdwaazb = "\"C:\\Users\\Admin\\AppData\\Roaming\\Fkgfqcjzll\\Fiyjdwaazb.exe\""	a5d90c7d3e393ee48132480fca1532cf.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4120 set thread context of 5024	4120	a5d90c7d3e393ee48132480fca1532cf.exe	82
PID 5024 set thread context of 628	5024	a5d90c7d3e393ee48132480fca1532cf.exe	83
PID 5024 set thread context of 1704	5024	a5d90c7d3e393ee48132480fca1532cf.exe	84
PID 5024 set thread context of 1288	5024	a5d90c7d3e393ee48132480fca1532cf.exe	85

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4488	1704	WerFault.exe	84

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2720	powershell.exe
2720	powershell.exe
628	a5d90c7d3e393ee48132480fca1532cf.exe
628	a5d90c7d3e393ee48132480fca1532cf.exe
1288	a5d90c7d3e393ee48132480fca1532cf.exe
1288	a5d90c7d3e393ee48132480fca1532cf.exe
628	a5d90c7d3e393ee48132480fca1532cf.exe
628	a5d90c7d3e393ee48132480fca1532cf.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
5024	a5d90c7d3e393ee48132480fca1532cf.exe
5024	a5d90c7d3e393ee48132480fca1532cf.exe
5024	a5d90c7d3e393ee48132480fca1532cf.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4120	a5d90c7d3e393ee48132480fca1532cf.exe
Token: SeDebugPrivilege	2720	powershell.exe
Token: SeDebugPrivilege	1288	a5d90c7d3e393ee48132480fca1532cf.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5024	a5d90c7d3e393ee48132480fca1532cf.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
1704	a5d90c7d3e393ee48132480fca1532cf.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 4120 wrote to memory of 2720	4120	a5d90c7d3e393ee48132480fca1532cf.exe	79
PID 4120 wrote to memory of 2720	4120	a5d90c7d3e393ee48132480fca1532cf.exe	79
PID 4120 wrote to memory of 2720	4120	a5d90c7d3e393ee48132480fca1532cf.exe	79
PID 4120 wrote to memory of 5024	4120	a5d90c7d3e393ee48132480fca1532cf.exe	82
PID 4120 wrote to memory of 5024	4120	a5d90c7d3e393ee48132480fca1532cf.exe	82
PID 4120 wrote to memory of 5024	4120	a5d90c7d3e393ee48132480fca1532cf.exe	82
PID 4120 wrote to memory of 5024	4120	a5d90c7d3e393ee48132480fca1532cf.exe	82
PID 4120 wrote to memory of 5024	4120	a5d90c7d3e393ee48132480fca1532cf.exe	82
PID 4120 wrote to memory of 5024	4120	a5d90c7d3e393ee48132480fca1532cf.exe	82
PID 4120 wrote to memory of 5024	4120	a5d90c7d3e393ee48132480fca1532cf.exe	82
PID 4120 wrote to memory of 5024	4120	a5d90c7d3e393ee48132480fca1532cf.exe	82
PID 4120 wrote to memory of 5024	4120	a5d90c7d3e393ee48132480fca1532cf.exe	82
PID 4120 wrote to memory of 5024	4120	a5d90c7d3e393ee48132480fca1532cf.exe	82
PID 4120 wrote to memory of 5024	4120	a5d90c7d3e393ee48132480fca1532cf.exe	82
PID 4120 wrote to memory of 5024	4120	a5d90c7d3e393ee48132480fca1532cf.exe	82
PID 5024 wrote to memory of 628	5024	a5d90c7d3e393ee48132480fca1532cf.exe	83
PID 5024 wrote to memory of 628	5024	a5d90c7d3e393ee48132480fca1532cf.exe	83
PID 5024 wrote to memory of 628	5024	a5d90c7d3e393ee48132480fca1532cf.exe	83
PID 5024 wrote to memory of 628	5024	a5d90c7d3e393ee48132480fca1532cf.exe	83
PID 5024 wrote to memory of 1704	5024	a5d90c7d3e393ee48132480fca1532cf.exe	84
PID 5024 wrote to memory of 1704	5024	a5d90c7d3e393ee48132480fca1532cf.exe	84
PID 5024 wrote to memory of 1704	5024	a5d90c7d3e393ee48132480fca1532cf.exe	84
PID 5024 wrote to memory of 1704	5024	a5d90c7d3e393ee48132480fca1532cf.exe	84
PID 5024 wrote to memory of 1288	5024	a5d90c7d3e393ee48132480fca1532cf.exe	85
PID 5024 wrote to memory of 1288	5024	a5d90c7d3e393ee48132480fca1532cf.exe	85
PID 5024 wrote to memory of 1288	5024	a5d90c7d3e393ee48132480fca1532cf.exe	85
PID 5024 wrote to memory of 1288	5024	a5d90c7d3e393ee48132480fca1532cf.exe	85

C:\Users\Admin\AppData\Local\Temp\a5d90c7d3e393ee48132480fca1532cf.exe
"C:\Users\Admin\AppData\Local\Temp\a5d90c7d3e393ee48132480fca1532cf.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4120
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMwA1AA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2720
- C:\Users\Admin\AppData\Local\Temp\a5d90c7d3e393ee48132480fca1532cf.exe
  C:\Users\Admin\AppData\Local\Temp\a5d90c7d3e393ee48132480fca1532cf.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5024
- - C:\Users\Admin\AppData\Local\Temp\a5d90c7d3e393ee48132480fca1532cf.exe
    C:\Users\Admin\AppData\Local\Temp\a5d90c7d3e393ee48132480fca1532cf.exe /stext "C:\Users\Admin\AppData\Local\Temp\kkjtfvmkaudscglnzjp"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:628
- - C:\Users\Admin\AppData\Local\Temp\a5d90c7d3e393ee48132480fca1532cf.exe
    C:\Users\Admin\AppData\Local\Temp\a5d90c7d3e393ee48132480fca1532cf.exe /stext "C:\Users\Admin\AppData\Local\Temp\ueplgoxmocvxemhrqtcrkhe"
    3⤵
    - Suspicious use of UnmapMainImage
    PID:1704
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1704 -s 12
      4⤵
      Program crash
      PID:4488
- - C:\Users\Admin\AppData\Local\Temp\a5d90c7d3e393ee48132480fca1532cf.exe
    C:\Users\Admin\AppData\Local\Temp\a5d90c7d3e393ee48132480fca1532cf.exe /stext "C:\Users\Admin\AppData\Local\Temp\wguehgifcknkosvvaewsumrxdt"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1288

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1704 -ip 1704
1⤵
PID:4916

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

kkjtfvmkaudscglnzjp

Path C:\Users\Admin\AppData\Local\Temp\kkjtfvmkaudscglnzjp
Size 4KB
SHA256 8d46702077d776b04085cbe5ce2f0e5971595ea4e11b025a215c4379e7fc18f8
MD5 07c14121728256ad56b1ef039a28e4a6
SHA1 0f39e1e02cd5e2b1b22d9e5470757ae13fe96738
SHA512 03d9113095e7b6143c4f99b131462fa451a9c2d7e841461603dace64bd6d525cb63d074384d2b3ff285a7183116f1715138beeb756fced9a6b1ad6fde36d4789
SSDEEP 48:wvvv0pxfvvcpxfdvv0pxBvv0pxakvv0p7:mvgxvYp1vgPvgbvg7
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/628-160-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/628-157-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/1288-159-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/1288-158-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/2720-147-0x0000000006410000-0x000000000642A000-memory.dmp

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memory/2720-141-0x0000000002950000-0x0000000002986000-memory.dmp

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memory/2720-145-0x0000000005F30000-0x0000000005F4E000-memory.dmp

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memory/2720-146-0x0000000007580000-0x0000000007BFA000-memory.dmp

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memory/2720-144-0x00000000058B0000-0x0000000005916000-memory.dmp

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memory/2720-143-0x0000000005840000-0x00000000058A6000-memory.dmp

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memory/2720-142-0x0000000005140000-0x0000000005768000-memory.dmp

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memory/4120-135-0x0000000000B60000-0x0000000000DB6000-memory.dmp

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memory/4120-136-0x0000000005D80000-0x0000000006324000-memory.dmp

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memory/4120-137-0x00000000057D0000-0x0000000005862000-memory.dmp

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memory/4120-138-0x0000000005760000-0x000000000576A000-memory.dmp

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memory/4120-139-0x00000000059E0000-0x0000000005A02000-memory.dmp

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memory/5024-153-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/5024-152-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/5024-151-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/5024-150-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/5024-149-0x0000000000400000-0x000000000047F000-memory.dmp

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