purecrypter | 4134bd82bbea78103d0e32728df856870eaa2c0188b59423115c7d779b2bf83a

General

Target

tmp.exe
Size

6KB
MD5

679104fb0479ff61c4b5e4b88f77d94b
SHA1

bfbcb5d48fb4ab25d52e4e1bedf37a4e7a4a3cab
SHA256

4134bd82bbea78103d0e32728df856870eaa2c0188b59423115c7d779b2bf83a
SHA512

7cb36200865267885939956614a7b8603cd16575a3857e0ecc238ff22d296b29bfb208bb11f61f3856278f6b4585afdb2c8456d2f2630f0fbc33fa298df0253e
SSDEEP

192:zU3efq7iEM9gdH98dfQbLE5lF22vjWwID:Q3efq7iEM9gdH98dfgLE5lI2vjlI

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%21125&authkey=AIgE8y9D-kUp_qA

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\Romgl = "\"C:\\Users\\Admin\\AppData\\Roaming\\Taaewqbiqv\\Romgl.exe\""	tmp.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

tmp.exe

description pid process target process

PID 4736 set thread context of 2120 4736 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 2 IoCs

Processes:

powershell.exe

pid process

1112 powershell.exe
1112 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

tmp.exepowershell.exe

description pid process

Token: SeDebugPrivilege 4736 tmp.exe
Token: SeDebugPrivilege 1112 powershell.exe

description	pid	process	target process
PID 4736 set thread context of 2120	4736	tmp.exe	tmp.exe

pid	process
1112	powershell.exe
1112	powershell.exe

description	pid	process
Token: SeDebugPrivilege	4736	tmp.exe
Token: SeDebugPrivilege	1112	powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

tmp.exe

description	pid	process	target process
PID 4736 wrote to memory of 1112	4736	tmp.exe	powershell.exe
PID 4736 wrote to memory of 1112	4736	tmp.exe	powershell.exe
PID 4736 wrote to memory of 1112	4736	tmp.exe	powershell.exe
PID 4736 wrote to memory of 2120	4736	tmp.exe	tmp.exe
PID 4736 wrote to memory of 2120	4736	tmp.exe	tmp.exe
PID 4736 wrote to memory of 2120	4736	tmp.exe	tmp.exe
PID 4736 wrote to memory of 2120	4736	tmp.exe	tmp.exe
PID 4736 wrote to memory of 2120	4736	tmp.exe	tmp.exe
PID 4736 wrote to memory of 2120	4736	tmp.exe	tmp.exe
PID 4736 wrote to memory of 2120	4736	tmp.exe	tmp.exe
PID 4736 wrote to memory of 2120	4736	tmp.exe	tmp.exe
PID 4736 wrote to memory of 2120	4736	tmp.exe	tmp.exe
PID 4736 wrote to memory of 2120	4736	tmp.exe	tmp.exe
PID 4736 wrote to memory of 2120	4736	tmp.exe	tmp.exe
PID 4736 wrote to memory of 2120	4736	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:4736

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:1112

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
PID:2120

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

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Downloads

memory/1112-140-0x00000000070F0000-0x000000000776A000-memory.dmp

Filesize
6.5MB

Download
memory/1112-136-0x0000000004C00000-0x0000000005228000-memory.dmp

Filesize
6.2MB

Download
memory/1112-134-0x0000000000000000-mapping.dmp

Download
memory/1112-135-0x0000000004500000-0x0000000004536000-memory.dmp

Filesize
216KB

Download
memory/1112-139-0x0000000005AA0000-0x0000000005ABE000-memory.dmp

Filesize
120KB

Download
memory/1112-137-0x0000000005330000-0x0000000005396000-memory.dmp

Filesize
408KB

Download
memory/1112-141-0x0000000005F90000-0x0000000005FAA000-memory.dmp

Filesize
104KB

Download
memory/1112-138-0x0000000005450000-0x00000000054B6000-memory.dmp

Filesize
408KB

Download
memory/2120-142-0x0000000000000000-mapping.dmp

Download
memory/2120-143-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2120-144-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2120-145-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2120-146-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2120-147-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4736-133-0x00000000066B0000-0x00000000066D2000-memory.dmp

Filesize
136KB

Download
memory/4736-132-0x00000000004D0000-0x00000000004D8000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads