purecrypter | 8650dcaece1489d98b7f6782ae638de33797f2a1018f949ec270054f0893aea0

General

Target

tmp.exe
Size

6KB
MD5

48a13c217c965ed66e5d6c018b89217b
SHA1

2d8b62d02c73e7e2fc367fc64b51350564c7acb4
SHA256

8650dcaece1489d98b7f6782ae638de33797f2a1018f949ec270054f0893aea0
SHA512

b0e5556ad36a74ddfbbbfcd94f04635a614bc70d159aaab8fb540ecd0d823e14c2ed8687b95943cd992b434c37c9bfaa04db79c62f9d654b85616f45d275802a
SSDEEP

96:4rs7rOMGPGDupbGL7g8y23I6mUUWH78kVl6l2xzNt:oKrsPGDupKL7nNhVlk2T

Score

10^/10

purecrypter remcos remotehost collection downloader loader persistence rat spyware stealer

Malware Config

Extracted

Family

purecrypter

C2

https://onedrive.live.com/download?cid=A113DD34A0D77810&resid=A113DD34A0D77810%21121&authkey=APUVM8ZXD6Jpjd0

Extracted

Family

remcos

Botnet

RemoteHost

C2

top.thekillforabuse1.xyz:1068

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-R762FE
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

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral2/memory/3180-152-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral2/memory/3860-153-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3860-154-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1568-151-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3180-152-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral2/memory/3860-153-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3860-154-0x0000000000400000-0x0000000000478000-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

Processes:

tmp.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation tmp.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

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	tmp.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

Processes:

tmp.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	tmp.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

tmp.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Tqgxduxq = "\"C:\\Users\\Admin\\AppData\\Roaming\\Fnslyd\\Tqgxduxq.exe\""	tmp.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

tmp.exetmp.exe

description	pid	process	target process
PID 5020 set thread context of 4272	5020	tmp.exe	tmp.exe
PID 4272 set thread context of 3860	4272	tmp.exe	tmp.exe
PID 4272 set thread context of 3180	4272	tmp.exe	tmp.exe
PID 4272 set thread context of 1568	4272	tmp.exe	tmp.exe

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

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

powershell.exetmp.exetmp.exe

pid process

3952 powershell.exe
3952 powershell.exe
1568 tmp.exe
1568 tmp.exe
3860 tmp.exe
3860 tmp.exe
3860 tmp.exe
3860 tmp.exe
Suspicious behavior: MapViewOfSection 4 IoCs

Processes:

tmp.exe

pid process

4272 tmp.exe
4272 tmp.exe
4272 tmp.exe
4272 tmp.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

tmp.exepowershell.exetmp.exe

description pid process

Token: SeDebugPrivilege 5020 tmp.exe
Token: SeDebugPrivilege 3952 powershell.exe
Token: SeDebugPrivilege 1568 tmp.exe

pid	process
3952	powershell.exe
3952	powershell.exe
1568	tmp.exe
1568	tmp.exe
3860	tmp.exe
3860	tmp.exe
3860	tmp.exe
3860	tmp.exe

pid	process
4272	tmp.exe
4272	tmp.exe
4272	tmp.exe
4272	tmp.exe

description	pid	process
Token: SeDebugPrivilege	5020	tmp.exe
Token: SeDebugPrivilege	3952	powershell.exe
Token: SeDebugPrivilege	1568	tmp.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

tmp.exetmp.exe

description	pid	process	target process
PID 5020 wrote to memory of 3952	5020	tmp.exe	powershell.exe
PID 5020 wrote to memory of 3952	5020	tmp.exe	powershell.exe
PID 5020 wrote to memory of 3952	5020	tmp.exe	powershell.exe
PID 5020 wrote to memory of 4272	5020	tmp.exe	tmp.exe
PID 5020 wrote to memory of 4272	5020	tmp.exe	tmp.exe
PID 5020 wrote to memory of 4272	5020	tmp.exe	tmp.exe
PID 5020 wrote to memory of 4272	5020	tmp.exe	tmp.exe
PID 5020 wrote to memory of 4272	5020	tmp.exe	tmp.exe
PID 5020 wrote to memory of 4272	5020	tmp.exe	tmp.exe
PID 5020 wrote to memory of 4272	5020	tmp.exe	tmp.exe
PID 5020 wrote to memory of 4272	5020	tmp.exe	tmp.exe
PID 5020 wrote to memory of 4272	5020	tmp.exe	tmp.exe
PID 5020 wrote to memory of 4272	5020	tmp.exe	tmp.exe
PID 5020 wrote to memory of 4272	5020	tmp.exe	tmp.exe
PID 5020 wrote to memory of 4272	5020	tmp.exe	tmp.exe
PID 4272 wrote to memory of 3860	4272	tmp.exe	tmp.exe
PID 4272 wrote to memory of 3860	4272	tmp.exe	tmp.exe
PID 4272 wrote to memory of 3860	4272	tmp.exe	tmp.exe
PID 4272 wrote to memory of 3860	4272	tmp.exe	tmp.exe
PID 4272 wrote to memory of 3180	4272	tmp.exe	tmp.exe
PID 4272 wrote to memory of 3180	4272	tmp.exe	tmp.exe
PID 4272 wrote to memory of 3180	4272	tmp.exe	tmp.exe
PID 4272 wrote to memory of 3180	4272	tmp.exe	tmp.exe
PID 4272 wrote to memory of 2484	4272	tmp.exe	tmp.exe
PID 4272 wrote to memory of 2484	4272	tmp.exe	tmp.exe
PID 4272 wrote to memory of 2484	4272	tmp.exe	tmp.exe
PID 4272 wrote to memory of 1568	4272	tmp.exe	tmp.exe
PID 4272 wrote to memory of 1568	4272	tmp.exe	tmp.exe
PID 4272 wrote to memory of 1568	4272	tmp.exe	tmp.exe
PID 4272 wrote to memory of 1568	4272	tmp.exe	tmp.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.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:5020

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3952

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4272

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe /stext "C:\Users\Admin\AppData\Local\Temp\edenryuyzsvzjmasxaqbneg"
3⤵
- Suspicious behavior: EnumeratesProcesses
PID:3860

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe /stext "C:\Users\Admin\AppData\Local\Temp\ogsysrnrvanmlswwokdcqjtmjg"
3⤵
- Accesses Microsoft Outlook accounts
PID:3180

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe /stext "C:\Users\Admin\AppData\Local\Temp\yaxrljytjigrvykaxvqwbwndrvgufh"
3⤵
PID:2484

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe /stext "C:\Users\Admin\AppData\Local\Temp\yaxrljytjigrvykaxvqwbwndrvgufh"
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1568

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\edenryuyzsvzjmasxaqbneg
Filesize
4KB

MD5
9945b47a62f116c5707cfe39eba4e3a3

SHA1
3a891690b33791216df5ca70ff15c288b8ec3223

SHA256
bec9bca76621ea0f0db461945ca513d00aba466d4cf882a437a8de82075784f1

SHA512
7c0ba560d4332ca00c6b2e3e938c50e7006b0775ba2eec3ff287adf656de508795be097a6a12d9f3cb9a43ac63c0f52f2574ad1cdebe868fd4ac02e683687e48

Download Submit
memory/1568-151-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1568-150-0x0000000000000000-mapping.dmp

Download
memory/2484-149-0x0000000000000000-mapping.dmp

Download
memory/3180-152-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/3180-148-0x0000000000000000-mapping.dmp

Download
memory/3860-147-0x0000000000000000-mapping.dmp

Download
memory/3860-154-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3860-153-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3952-139-0x00000000066E0000-0x00000000066FE000-memory.dmp

Filesize
120KB

Download
memory/3952-134-0x0000000000000000-mapping.dmp

Download
memory/3952-135-0x00000000030F0000-0x0000000003126000-memory.dmp

Filesize
216KB

Download
memory/3952-136-0x00000000058B0000-0x0000000005ED8000-memory.dmp

Filesize
6.2MB

Download
memory/3952-137-0x0000000006050000-0x00000000060B6000-memory.dmp

Filesize
408KB

Download
memory/3952-138-0x00000000060C0000-0x0000000006126000-memory.dmp

Filesize
408KB

Download
memory/3952-141-0x0000000006BE0000-0x0000000006BFA000-memory.dmp

Filesize
104KB

Download
memory/3952-140-0x0000000007D30000-0x00000000083AA000-memory.dmp

Filesize
6.5MB

Download
memory/4272-146-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4272-145-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4272-144-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4272-143-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4272-142-0x0000000000000000-mapping.dmp

Download
memory/4272-156-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4272-159-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4272-160-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4272-161-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4272-162-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/5020-132-0x0000000000580000-0x0000000000588000-memory.dmp

Filesize
32KB

Download
memory/5020-133-0x0000000007A50000-0x0000000007A72000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads