purecrypter | 1501ed409db46bc33f3f4a13c9d2150308597fb91cff20e04c9df0d5f3dec37d

Analysis

max time kernel
91s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
01/02/2023, 15:56

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General

Target
6f97a3f9d8c88ac5ba01fccf033a66aa.exe
Size 172KB
Sample230201-tdcdlacd61
SHA256 1501ed409db46bc33f3f4a13c9d2150308597fb91cff20e04c9df0d5f3dec37d
MD5 6f97a3f9d8c88ac5ba01fccf033a66aa
SHA1 5152b20ec9d63e9decb5a17ae652ebd105ce0a24
SHA512 a6c3afda108f973a0a4d424db289726c5ee0a46c88030e9354ffa639e81e03a6c4209dbfef4d0c384e919a7a904d4c15feef8e33057017f6a62843362640bdcb
SSDEEP 1536:pc9URWzKr7PhuuUpV7+5JTiy95UuUCQahsf5mZIWiwwr7QXsouW2ASDDA6rRcC+R:ppWaxa7Dy956S2j4xnsvXtPdSae1
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

purecrypter downloader loader persistence spyware

Malware Config

Extracted

Family

purecrypter

http://163.123.142.210/Twpowpijhqf.dat

Signatures

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	6f97a3f9d8c88ac5ba01fccf033a66aa.exe

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

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-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\exoduswallett = "\"C:\\Users\\Admin\\AppData\\Roaming\\Exodus\\exoduswallett.exe\""	6f97a3f9d8c88ac5ba01fccf033a66aa.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1476 set thread context of 3472	1476	6f97a3f9d8c88ac5ba01fccf033a66aa.exe	87

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

pid	Process
4048	powershell.exe
4048	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1476	6f97a3f9d8c88ac5ba01fccf033a66aa.exe
Token: SeDebugPrivilege	4048	powershell.exe
Token: SeDebugPrivilege	3472	RegAsm.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1476 wrote to memory of 4048	1476	6f97a3f9d8c88ac5ba01fccf033a66aa.exe	79
PID 1476 wrote to memory of 4048	1476	6f97a3f9d8c88ac5ba01fccf033a66aa.exe	79
PID 1476 wrote to memory of 4048	1476	6f97a3f9d8c88ac5ba01fccf033a66aa.exe	79
PID 1476 wrote to memory of 3472	1476	6f97a3f9d8c88ac5ba01fccf033a66aa.exe	87
PID 1476 wrote to memory of 3472	1476	6f97a3f9d8c88ac5ba01fccf033a66aa.exe	87
PID 1476 wrote to memory of 3472	1476	6f97a3f9d8c88ac5ba01fccf033a66aa.exe	87
PID 1476 wrote to memory of 3472	1476	6f97a3f9d8c88ac5ba01fccf033a66aa.exe	87
PID 1476 wrote to memory of 3472	1476	6f97a3f9d8c88ac5ba01fccf033a66aa.exe	87
PID 1476 wrote to memory of 3472	1476	6f97a3f9d8c88ac5ba01fccf033a66aa.exe	87
PID 1476 wrote to memory of 3472	1476	6f97a3f9d8c88ac5ba01fccf033a66aa.exe	87
PID 1476 wrote to memory of 3472	1476	6f97a3f9d8c88ac5ba01fccf033a66aa.exe	87

C:\Users\Admin\AppData\Local\Temp\6f97a3f9d8c88ac5ba01fccf033a66aa.exe
"C:\Users\Admin\AppData\Local\Temp\6f97a3f9d8c88ac5ba01fccf033a66aa.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:1476
- 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:4048
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3472

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/1476-132-0x0000000000920000-0x0000000000950000-memory.dmp

Download

memory/1476-133-0x0000000007B20000-0x0000000007B42000-memory.dmp

Download

memory/3472-143-0x0000000000400000-0x0000000000484000-memory.dmp

Download

memory/4048-135-0x0000000002E60000-0x0000000002E96000-memory.dmp

Download

memory/4048-136-0x0000000005690000-0x0000000005CB8000-memory.dmp

Download

memory/4048-137-0x00000000054F0000-0x0000000005556000-memory.dmp

Download

memory/4048-138-0x0000000005610000-0x0000000005676000-memory.dmp

Download

memory/4048-139-0x0000000006430000-0x000000000644E000-memory.dmp

Download

memory/4048-140-0x0000000007A80000-0x00000000080FA000-memory.dmp

Download

memory/4048-141-0x0000000006930000-0x000000000694A000-memory.dmp

Download