purecrypter | 85420ddd075768164031bf43563925bff88c5b298d7924ca95fe1cb0519dd76b

General

Target

Request For Quotation.exe
Size

6KB
MD5

1b7fda525abb7145a0cf5099a2bb0124
SHA1

5f0445d82f2f59d66d74df0f321bcd63023a87c5
SHA256

85420ddd075768164031bf43563925bff88c5b298d7924ca95fe1cb0519dd76b
SHA512

8e212b39215328bac75782340957ac71b3fb22f444f7ad18b14eae1a483c0413e870b677cfb48e850a9c4cc5ef182e6d1ae796d4bb7cbaf16446983c06a0d5b1
SSDEEP

96:rmc26N/JsNp8syjxQbw3kBFWkhL6CFRQt15vr3F6JNQikFtCaX/BzNt:rfJRW8HxswUnWaL6YG5vDMoFbX/D

Score

10^/10

purecrypter remcos 28282 downloader loader persistence rat

Malware Config

Extracted

Family

purecrypter

C2

http://194.180.49.17/Pruwgxlsz.bmp

Extracted

Family

remcos

Botnet

28282

C2

194.180.49.17:28282

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
gqhwjekrltlu-TOU33Q
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

Processes:

resource	yara_rule
behavioral1/memory/2032-56-0x00000000062F0000-0x00000000065A0000-memory.dmp	family_purecrypter

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

Request For Quotation.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Roaming\\Gftqyx\\Wgdlak.exe\","	Request For Quotation.exe

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
Suspicious use of SetThreadContext 1 IoCs

Processes:

Request For Quotation.exe

description pid process target process

PID 2032 set thread context of 984 2032 Request For Quotation.exe Request For Quotation.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 1 IoCs

Processes:

powershell.exe

pid process

1068 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Request For Quotation.exepowershell.exe

description pid process

Token: SeDebugPrivilege 2032 Request For Quotation.exe
Token: SeDebugPrivilege 1068 powershell.exe

description	pid	process	target process
PID 2032 set thread context of 984	2032	Request For Quotation.exe	Request For Quotation.exe

pid	process
1068	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2032	Request For Quotation.exe
Token: SeDebugPrivilege	1068	powershell.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

Request For Quotation.exe

description	pid	process	target process
PID 2032 wrote to memory of 1068	2032	Request For Quotation.exe	powershell.exe
PID 2032 wrote to memory of 1068	2032	Request For Quotation.exe	powershell.exe
PID 2032 wrote to memory of 1068	2032	Request For Quotation.exe	powershell.exe
PID 2032 wrote to memory of 1068	2032	Request For Quotation.exe	powershell.exe
PID 2032 wrote to memory of 984	2032	Request For Quotation.exe	Request For Quotation.exe
PID 2032 wrote to memory of 984	2032	Request For Quotation.exe	Request For Quotation.exe
PID 2032 wrote to memory of 984	2032	Request For Quotation.exe	Request For Quotation.exe
PID 2032 wrote to memory of 984	2032	Request For Quotation.exe	Request For Quotation.exe
PID 2032 wrote to memory of 984	2032	Request For Quotation.exe	Request For Quotation.exe
PID 2032 wrote to memory of 984	2032	Request For Quotation.exe	Request For Quotation.exe
PID 2032 wrote to memory of 984	2032	Request For Quotation.exe	Request For Quotation.exe
PID 2032 wrote to memory of 984	2032	Request For Quotation.exe	Request For Quotation.exe
PID 2032 wrote to memory of 984	2032	Request For Quotation.exe	Request For Quotation.exe
PID 2032 wrote to memory of 984	2032	Request For Quotation.exe	Request For Quotation.exe
PID 2032 wrote to memory of 984	2032	Request For Quotation.exe	Request For Quotation.exe
PID 2032 wrote to memory of 984	2032	Request For Quotation.exe	Request For Quotation.exe
PID 2032 wrote to memory of 984	2032	Request For Quotation.exe	Request For Quotation.exe

C:\Users\Admin\AppData\Local\Temp\Request For Quotation.exe
"C:\Users\Admin\AppData\Local\Temp\Request For Quotation.exe"
1⤵
- Modifies WinLogon for persistence
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2032

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:1068

C:\Users\Admin\AppData\Local\Temp\Request For Quotation.exe
"C:\Users\Admin\AppData\Local\Temp\Request For Quotation.exe"
2⤵
PID:984

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/984-73-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-70-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-66-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-69-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-68-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-81-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-80-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-79-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-63-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-64-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-76-0x0000000000432C26-mapping.dmp

Download
memory/984-75-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-71-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1068-61-0x000000006FB50000-0x00000000700FB000-memory.dmp

Filesize
5.7MB

Download
memory/1068-57-0x0000000000000000-mapping.dmp

Download
memory/1068-59-0x000000006FB50000-0x00000000700FB000-memory.dmp

Filesize
5.7MB

Download
memory/1068-60-0x000000006FB50000-0x00000000700FB000-memory.dmp

Filesize
5.7MB

Download
memory/2032-54-0x0000000000C40000-0x0000000000C48000-memory.dmp

Filesize
32KB

Download
memory/2032-56-0x00000000062F0000-0x00000000065A0000-memory.dmp

Filesize
2.7MB

Download
memory/2032-62-0x0000000000630000-0x00000000006B0000-memory.dmp

Filesize
512KB

Download
memory/2032-55-0x00000000767B1000-0x00000000767B3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads