purecrypter | d9a6784d3b2bad93ddeeed54bfa5897b58d8f156172b307701b95e19a4fd3c7c

Analysis

max time kernel
47s
max time network
152s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
27-01-2023 14:14

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General

Target

7f98f49b5c7c21fa388f00acff0f37bd.exe
Size

7KB
MD5

7f98f49b5c7c21fa388f00acff0f37bd
SHA1

8c3c26d459069cf012d3b301e9349730dd262b6c
SHA256

d9a6784d3b2bad93ddeeed54bfa5897b58d8f156172b307701b95e19a4fd3c7c
SHA512

69322d61a7d7068418aaee919e6cb2983e6060ccc6c1f7afb69407d49be59462a98a5dcadc0689484b5c41ed9aaa7294653c6873828ad3e374776090a9055064
SSDEEP

96:ymITl1KYgrxmJZVqPjTLosmiZ0RxqRvD8phOx6kqOazZSOzNt:ymIpBgmJZVqPr7miZ0yp8hOxH+zoI

Score

10^/10

purecrypter collection downloader loader persistence spyware stealer

Malware Config

Signatures

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/1564-56-0x0000000006490000-0x00000000066F4000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
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 Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	7f98f49b5c7c21fa388f00acff0f37bd.exe
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	7f98f49b5c7c21fa388f00acff0f37bd.exe
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	7f98f49b5c7c21fa388f00acff0f37bd.exe

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-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\Lvjganvnh = "\"C:\\Users\\Admin\\AppData\\Roaming\\Spnieqcykqk\\Lvjganvnh.exe\""	7f98f49b5c7c21fa388f00acff0f37bd.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
6	api.ipify.org
7	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1564 set thread context of 2016	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	39

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Gathers network information 2 TTPs 2 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command-Line Interface

T1059

pid	Process
1992	ipconfig.exe
1904	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1772	powershell.exe
1564	7f98f49b5c7c21fa388f00acff0f37bd.exe
1564	7f98f49b5c7c21fa388f00acff0f37bd.exe
1564	7f98f49b5c7c21fa388f00acff0f37bd.exe
1564	7f98f49b5c7c21fa388f00acff0f37bd.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe
Token: SeDebugPrivilege	1772	powershell.exe
Token: SeDebugPrivilege	2016	7f98f49b5c7c21fa388f00acff0f37bd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2016	7f98f49b5c7c21fa388f00acff0f37bd.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 1564 wrote to memory of 2036	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	28
PID 1564 wrote to memory of 2036	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	28
PID 1564 wrote to memory of 2036	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	28
PID 1564 wrote to memory of 2036	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	28
PID 2036 wrote to memory of 1992	2036	cmd.exe	30
PID 2036 wrote to memory of 1992	2036	cmd.exe	30
PID 2036 wrote to memory of 1992	2036	cmd.exe	30
PID 2036 wrote to memory of 1992	2036	cmd.exe	30
PID 1564 wrote to memory of 1772	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	31
PID 1564 wrote to memory of 1772	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	31
PID 1564 wrote to memory of 1772	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	31
PID 1564 wrote to memory of 1772	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	31
PID 1564 wrote to memory of 268	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	34
PID 1564 wrote to memory of 268	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	34
PID 1564 wrote to memory of 268	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	34
PID 1564 wrote to memory of 268	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	34
PID 268 wrote to memory of 1904	268	cmd.exe	36
PID 268 wrote to memory of 1904	268	cmd.exe	36
PID 268 wrote to memory of 1904	268	cmd.exe	36
PID 268 wrote to memory of 1904	268	cmd.exe	36
PID 1564 wrote to memory of 1104	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	37
PID 1564 wrote to memory of 1104	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	37
PID 1564 wrote to memory of 1104	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	37
PID 1564 wrote to memory of 1104	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	37
PID 1564 wrote to memory of 340	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	38
PID 1564 wrote to memory of 340	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	38
PID 1564 wrote to memory of 340	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	38
PID 1564 wrote to memory of 340	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	38
PID 1564 wrote to memory of 2016	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	39
PID 1564 wrote to memory of 2016	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	39
PID 1564 wrote to memory of 2016	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	39
PID 1564 wrote to memory of 2016	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	39
PID 1564 wrote to memory of 2016	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	39
PID 1564 wrote to memory of 2016	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	39
PID 1564 wrote to memory of 2016	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	39
PID 1564 wrote to memory of 2016	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	39
PID 1564 wrote to memory of 2016	1564	7f98f49b5c7c21fa388f00acff0f37bd.exe	39

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	7f98f49b5c7c21fa388f00acff0f37bd.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	7f98f49b5c7c21fa388f00acff0f37bd.exe

C:\Users\Admin\AppData\Local\Temp\7f98f49b5c7c21fa388f00acff0f37bd.exe
"C:\Users\Admin\AppData\Local\Temp\7f98f49b5c7c21fa388f00acff0f37bd.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1564
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c ipconfig/release
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2036
- - C:\Windows\SysWOW64\ipconfig.exe
    ipconfig /release
    3⤵
    - Gathers network information
    PID:1992
- 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:1772
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c ipconfig/renew
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:268
- - C:\Windows\SysWOW64\ipconfig.exe
    ipconfig /renew
    3⤵
    - Gathers network information
    PID:1904
- C:\Users\Admin\AppData\Local\Temp\7f98f49b5c7c21fa388f00acff0f37bd.exe
  C:\Users\Admin\AppData\Local\Temp\7f98f49b5c7c21fa388f00acff0f37bd.exe
  2⤵
  PID:1104
- C:\Users\Admin\AppData\Local\Temp\7f98f49b5c7c21fa388f00acff0f37bd.exe
  C:\Users\Admin\AppData\Local\Temp\7f98f49b5c7c21fa388f00acff0f37bd.exe
  2⤵
  PID:340
- C:\Users\Admin\AppData\Local\Temp\7f98f49b5c7c21fa388f00acff0f37bd.exe
  C:\Users\Admin\AppData\Local\Temp\7f98f49b5c7c21fa388f00acff0f37bd.exe
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - outlook_office_path
  - outlook_win_path
  PID:2016

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

T1059

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

memory/1564-55-0x0000000075FB1000-0x0000000075FB3000-memory.dmp

Filesize
8KB

Download
memory/1564-56-0x0000000006490000-0x00000000066F4000-memory.dmp

Filesize
2.4MB

Download
memory/1564-68-0x00000000052F0000-0x0000000005344000-memory.dmp

Filesize
336KB

Download
memory/1564-54-0x00000000008E0000-0x00000000008E8000-memory.dmp

Filesize
32KB

Download
memory/1772-62-0x000000006F3E0000-0x000000006F98B000-memory.dmp

Filesize
5.7MB

Download
memory/1772-63-0x000000006F3E0000-0x000000006F98B000-memory.dmp

Filesize
5.7MB

Download
memory/1772-64-0x000000006F3E0000-0x000000006F98B000-memory.dmp

Filesize
5.7MB

Download
memory/2016-69-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2016-70-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2016-73-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2016-72-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2016-74-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2016-77-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2016-79-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download