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 downloader loader persistence rat

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
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

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

Processes:

tmp.exe

description pid process target process

PID 1060 set thread context of 3600 1060 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 6 IoCs

Processes:

powershell.exetmp.exe

pid process

2700 powershell.exe
2700 powershell.exe
1060 tmp.exe
1060 tmp.exe
1060 tmp.exe
1060 tmp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

tmp.exepowershell.exe

description pid process

Token: SeDebugPrivilege 1060 tmp.exe
Token: SeDebugPrivilege 2700 powershell.exe

description	pid	process	target process
PID 1060 set thread context of 3600	1060	tmp.exe	tmp.exe

pid	process
2700	powershell.exe
2700	powershell.exe
1060	tmp.exe
1060	tmp.exe
1060	tmp.exe
1060	tmp.exe

description	pid	process
Token: SeDebugPrivilege	1060	tmp.exe
Token: SeDebugPrivilege	2700	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

tmp.exe

description	pid	process	target process
PID 1060 wrote to memory of 2700	1060	tmp.exe	powershell.exe
PID 1060 wrote to memory of 2700	1060	tmp.exe	powershell.exe
PID 1060 wrote to memory of 2700	1060	tmp.exe	powershell.exe
PID 1060 wrote to memory of 4056	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 4056	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 4056	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 2716	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 2716	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 2716	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 3600	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 3600	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 3600	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 3600	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 3600	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 3600	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 3600	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 3600	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 3600	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 3600	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 3600	1060	tmp.exe	tmp.exe
PID 1060 wrote to memory of 3600	1060	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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1060

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:2700

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
PID:4056

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
PID:2716

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
PID:3600

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

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1060-132-0x0000000000EF0000-0x0000000000EF8000-memory.dmp

Filesize
32KB

Download
memory/1060-133-0x0000000008360000-0x0000000008382000-memory.dmp

Filesize
136KB

Download
memory/2700-140-0x0000000008200000-0x000000000887A000-memory.dmp

Filesize
6.5MB

Download
memory/2700-141-0x0000000006E80000-0x0000000006E9A000-memory.dmp

Filesize
104KB

Download
memory/2700-136-0x0000000005AB0000-0x00000000060D8000-memory.dmp

Filesize
6.2MB

Download
memory/2700-137-0x00000000062B0000-0x0000000006316000-memory.dmp

Filesize
408KB

Download
memory/2700-138-0x0000000006320000-0x0000000006386000-memory.dmp

Filesize
408KB

Download
memory/2700-139-0x00000000069A0000-0x00000000069BE000-memory.dmp

Filesize
120KB

Download
memory/2700-134-0x0000000000000000-mapping.dmp

Download
memory/2700-135-0x00000000033C0000-0x00000000033F6000-memory.dmp

Filesize
216KB

Download
memory/2716-143-0x0000000000000000-mapping.dmp

Download
memory/3600-144-0x0000000000000000-mapping.dmp

Download
memory/3600-145-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3600-146-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3600-147-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3600-148-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3600-149-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4056-142-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads