purecrypter | 7cb2c350a025880efcd530e13a25bf9a11a1708a9603307e8750595b60e536ab

Analysis

max time kernel
149s
max time network
151s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
08-02-2023 09:58

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General

Target

3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
Size

2.6MB
MD5

0fb29b3596164f56c1e599e88e9de6bc
SHA1

1208d75d6fd23f64b34358254421c9c817f89802
SHA256

3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656
SHA512

e10b5fc5046723729c00f8d3a295d90a9628a41651d9fd2338edea37361924436cad668573d9bd281f94b518abd8111d067c6aa370314ddafe16ad3022eedbe8
SSDEEP

49152:rAQuUQKJOdXIA+aXnFT3rXHwrg9VM51cks3tyJGbaaIadIQEOll/WZtUYEzxCWng:unArgUw5/I0IMbW2zxCWt+

Score

10^/10

purecrypter remcos kay & matty co.collection downloader loader persistence rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

Kay & Matty Co.

176.126.86.245:62520

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-BH9O5G
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

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/1728-55-0x0000000004CB0000-0x0000000004F40000-memory.dmp	family_purecrypter

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 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/536-85-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral1/memory/536-86-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/360-83-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 4 IoCs

resource	yara_rule
behavioral1/memory/1724-82-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/360-83-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/536-85-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/536-86-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft

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

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe

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-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\frirefox = "\"C:\\Users\\Admin\\AppData\\Roaming\\downloads\\frirefox.exe\""	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1728 set thread context of 1144	1728	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 1144 set thread context of 360	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	30
PID 1144 set thread context of 536	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	31
PID 1144 set thread context of 1724	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	32

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
360	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
360	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1728	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
Token: SeDebugPrivilege	1724	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1728 wrote to memory of 1144	1728	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 1728 wrote to memory of 1144	1728	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 1728 wrote to memory of 1144	1728	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 1728 wrote to memory of 1144	1728	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 1728 wrote to memory of 1144	1728	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 1728 wrote to memory of 1144	1728	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 1728 wrote to memory of 1144	1728	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 1728 wrote to memory of 1144	1728	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 1728 wrote to memory of 1144	1728	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 1728 wrote to memory of 1144	1728	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 1728 wrote to memory of 1144	1728	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 1728 wrote to memory of 1144	1728	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 1728 wrote to memory of 1144	1728	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 1144 wrote to memory of 360	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	30
PID 1144 wrote to memory of 360	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	30
PID 1144 wrote to memory of 360	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	30
PID 1144 wrote to memory of 360	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	30
PID 1144 wrote to memory of 360	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	30
PID 1144 wrote to memory of 536	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	31
PID 1144 wrote to memory of 536	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	31
PID 1144 wrote to memory of 536	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	31
PID 1144 wrote to memory of 536	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	31
PID 1144 wrote to memory of 536	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	31
PID 1144 wrote to memory of 1724	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	32
PID 1144 wrote to memory of 1724	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	32
PID 1144 wrote to memory of 1724	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	32
PID 1144 wrote to memory of 1724	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	32
PID 1144 wrote to memory of 1724	1144	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	32

C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
"C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1728
- C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1144
- - C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
    C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe /stext "C:\Users\Admin\AppData\Local\Temp\qmorwctctplnczbss"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:360
- - C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
    C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe /stext "C:\Users\Admin\AppData\Local\Temp\sptjxvdwpxdsmfxwbazkb"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:536
- - C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
    C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe /stext "C:\Users\Admin\AppData\Local\Temp\djyuynoxdfvxotlatkllmezm"
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1724

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

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\qmorwctctplnczbss

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/360-83-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/536-86-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/536-85-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1144-63-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1144-59-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1144-64-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1144-68-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1144-66-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1144-65-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1144-70-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1144-74-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1144-75-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1144-61-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1144-92-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1144-91-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1144-90-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1144-58-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1144-87-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1724-82-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1728-56-0x0000000075881000-0x0000000075883000-memory.dmp

Filesize
8KB

Download
memory/1728-55-0x0000000004CB0000-0x0000000004F40000-memory.dmp

Filesize
2.6MB

Download
memory/1728-57-0x0000000000DA0000-0x0000000000E20000-memory.dmp

Filesize
512KB

Download
memory/1728-54-0x0000000001120000-0x00000000013C2000-memory.dmp

Filesize
2.6MB

Download