purecrypter | c89c19f79b2fdf5a50b4f152327956504b80758552625d4d9562dc66e14b90df

General

Target

deflated-unityinstaller.exe
Size

278KB
MD5

fb48937c11f4bda57dad5c55bb7bcc0e
SHA1

e559b23402f70d80b7f26b37c965a4ef17d9c2d4
SHA256

c89c19f79b2fdf5a50b4f152327956504b80758552625d4d9562dc66e14b90df
SHA512

f58403183ea9bb119411559aa186395440015255e74c0126bd242e2db63b4537eef5a4581754f22a84f47d233655d46c1fbebe5c273c15d030506641f8bcb999
SSDEEP

3072:ecssB5G0w2Zoh30PMgXTmQrV9XqH8NiqpytGSdfD:enYZC30PwQh9Lr+

Score

10^/10

purecrypter discovery downloader loader spyware stealer

Malware Config

Signatures

Detect PureCrypter injector 1 IoCs

loader

Processes:

resource	yara_rule
behavioral1/memory/1740-57-0x0000000006260000-0x00000000064E8000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Suspicious use of SetThreadContext 1 IoCs

Processes:

deflated-unityinstaller.exe

description pid process target process

PID 1740 set thread context of 884 1740 deflated-unityinstaller.exe deflated-unityinstaller.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

1120 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

deflated-unityinstaller.exepowershell.exe

description pid process

Token: SeDebugPrivilege 1740 deflated-unityinstaller.exe
Token: SeDebugPrivilege 1120 powershell.exe

description	pid	process	target process
PID 1740 set thread context of 884	1740	deflated-unityinstaller.exe	deflated-unityinstaller.exe

pid	process
1120	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1740	deflated-unityinstaller.exe
Token: SeDebugPrivilege	1120	powershell.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

deflated-unityinstaller.exe

description	pid	process	target process
PID 1740 wrote to memory of 1120	1740	deflated-unityinstaller.exe	powershell.exe
PID 1740 wrote to memory of 1120	1740	deflated-unityinstaller.exe	powershell.exe
PID 1740 wrote to memory of 1120	1740	deflated-unityinstaller.exe	powershell.exe
PID 1740 wrote to memory of 1120	1740	deflated-unityinstaller.exe	powershell.exe
PID 1740 wrote to memory of 884	1740	deflated-unityinstaller.exe	deflated-unityinstaller.exe
PID 1740 wrote to memory of 884	1740	deflated-unityinstaller.exe	deflated-unityinstaller.exe
PID 1740 wrote to memory of 884	1740	deflated-unityinstaller.exe	deflated-unityinstaller.exe
PID 1740 wrote to memory of 884	1740	deflated-unityinstaller.exe	deflated-unityinstaller.exe
PID 1740 wrote to memory of 884	1740	deflated-unityinstaller.exe	deflated-unityinstaller.exe
PID 1740 wrote to memory of 884	1740	deflated-unityinstaller.exe	deflated-unityinstaller.exe
PID 1740 wrote to memory of 884	1740	deflated-unityinstaller.exe	deflated-unityinstaller.exe
PID 1740 wrote to memory of 884	1740	deflated-unityinstaller.exe	deflated-unityinstaller.exe
PID 1740 wrote to memory of 884	1740	deflated-unityinstaller.exe	deflated-unityinstaller.exe
PID 1740 wrote to memory of 884	1740	deflated-unityinstaller.exe	deflated-unityinstaller.exe
PID 1740 wrote to memory of 884	1740	deflated-unityinstaller.exe	deflated-unityinstaller.exe
PID 1740 wrote to memory of 884	1740	deflated-unityinstaller.exe	deflated-unityinstaller.exe
PID 1740 wrote to memory of 884	1740	deflated-unityinstaller.exe	deflated-unityinstaller.exe
PID 1740 wrote to memory of 884	1740	deflated-unityinstaller.exe	deflated-unityinstaller.exe

C:\Users\Admin\AppData\Local\Temp\deflated-unityinstaller.exe
"C:\Users\Admin\AppData\Local\Temp\deflated-unityinstaller.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1740

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:1120

C:\Users\Admin\AppData\Local\Temp\deflated-unityinstaller.exe
C:\Users\Admin\AppData\Local\Temp\deflated-unityinstaller.exe
2⤵
PID:884

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/884-73-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/884-70-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/884-77-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/884-64-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/884-74-0x00000000004090AC-mapping.dmp

Download
memory/884-71-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/884-69-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/884-65-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/884-78-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/884-76-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/884-67-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1120-62-0x000000006ECF0000-0x000000006F29B000-memory.dmp

Filesize
5.7MB

Download
memory/1120-61-0x000000006ECF0000-0x000000006F29B000-memory.dmp

Filesize
5.7MB

Download
memory/1120-60-0x000000006ECF0000-0x000000006F29B000-memory.dmp

Filesize
5.7MB

Download
memory/1120-58-0x0000000000000000-mapping.dmp

Download
memory/1740-55-0x0000000074FA1000-0x0000000074FA3000-memory.dmp

Filesize
8KB

Download
memory/1740-54-0x0000000001280000-0x00000000012CA000-memory.dmp

Filesize
296KB

Download
memory/1740-57-0x0000000006260000-0x00000000064E8000-memory.dmp

Filesize
2.5MB

Download
memory/1740-56-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1740-63-0x0000000005060000-0x00000000050B8000-memory.dmp

Filesize
352KB

Download

Analysis

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