purecrypter | 1501ed409db46bc33f3f4a13c9d2150308597fb91cff20e04c9df0d5f3dec37d

Analysis

max time kernel
91s
max time network
105s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
02-02-2023 11:17

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General

Target

deliver.exe
Size

172KB
MD5

6f97a3f9d8c88ac5ba01fccf033a66aa
SHA1

5152b20ec9d63e9decb5a17ae652ebd105ce0a24
SHA256

1501ed409db46bc33f3f4a13c9d2150308597fb91cff20e04c9df0d5f3dec37d
SHA512

a6c3afda108f973a0a4d424db289726c5ee0a46c88030e9354ffa639e81e03a6c4209dbfef4d0c384e919a7a904d4c15feef8e33057017f6a62843362640bdcb
SSDEEP

1536:pc9URWzKr7PhuuUpV7+5JTiy95UuUCQahsf5mZIWiwwr7QXsouW2ASDDA6rRcC+R:ppWaxa7Dy956S2j4xnsvXtPdSae1

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

Processes:

deliver.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation deliver.exe
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	deliver.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

deliver.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\exoduswallett = "\"C:\\Users\\Admin\\AppData\\Roaming\\Exodus\\exoduswallett.exe\""	deliver.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

deliver.exe

description pid process target process

PID 3040 set thread context of 3540 3040 deliver.exe RegAsm.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

4544 powershell.exe
4544 powershell.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

deliver.exepowershell.exeRegAsm.exe

description pid process

Token: SeDebugPrivilege 3040 deliver.exe
Token: SeDebugPrivilege 4544 powershell.exe
Token: SeDebugPrivilege 3540 RegAsm.exe

description	pid	process	target process
PID 3040 set thread context of 3540	3040	deliver.exe	RegAsm.exe

pid	process
4544	powershell.exe
4544	powershell.exe

description	pid	process
Token: SeDebugPrivilege	3040	deliver.exe
Token: SeDebugPrivilege	4544	powershell.exe
Token: SeDebugPrivilege	3540	RegAsm.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

deliver.exe

description	pid	process	target process
PID 3040 wrote to memory of 4544	3040	deliver.exe	powershell.exe
PID 3040 wrote to memory of 4544	3040	deliver.exe	powershell.exe
PID 3040 wrote to memory of 4544	3040	deliver.exe	powershell.exe
PID 3040 wrote to memory of 3540	3040	deliver.exe	RegAsm.exe
PID 3040 wrote to memory of 3540	3040	deliver.exe	RegAsm.exe
PID 3040 wrote to memory of 3540	3040	deliver.exe	RegAsm.exe
PID 3040 wrote to memory of 3540	3040	deliver.exe	RegAsm.exe
PID 3040 wrote to memory of 3540	3040	deliver.exe	RegAsm.exe
PID 3040 wrote to memory of 3540	3040	deliver.exe	RegAsm.exe
PID 3040 wrote to memory of 3540	3040	deliver.exe	RegAsm.exe
PID 3040 wrote to memory of 3540	3040	deliver.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\deliver.exe
"C:\Users\Admin\AppData\Local\Temp\deliver.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:3040

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:4544

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:3540

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/3040-132-0x0000000000060000-0x0000000000090000-memory.dmp

Filesize
192KB

Download
memory/3040-133-0x00000000073B0000-0x00000000073D2000-memory.dmp

Filesize
136KB

Download
memory/3540-142-0x0000000000000000-mapping.dmp

Download
memory/3540-143-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4544-134-0x0000000000000000-mapping.dmp

Download
memory/4544-135-0x00000000044A0000-0x00000000044D6000-memory.dmp

Filesize
216KB

Download
memory/4544-136-0x0000000004B10000-0x0000000005138000-memory.dmp

Filesize
6.2MB

Download
memory/4544-137-0x0000000005350000-0x00000000053B6000-memory.dmp

Filesize
408KB

Download
memory/4544-138-0x00000000053C0000-0x0000000005426000-memory.dmp

Filesize
408KB

Download
memory/4544-139-0x0000000005A40000-0x0000000005A5E000-memory.dmp

Filesize
120KB

Download
memory/4544-140-0x0000000007140000-0x00000000077BA000-memory.dmp

Filesize
6.5MB

Download
memory/4544-141-0x0000000006B00000-0x0000000006B1A000-memory.dmp

Filesize
104KB

Download