purecrypter | 9fbd44c68c8181d842e2553efc72b2f56324d638f56e2581b2db2ce53421d70f

Analysis

max time kernel
148s
max time network
152s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
16-02-2023 07:27

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General

Target

b67649a9a69b4891e75746f8ed5ffbec.exe
Size

1.5MB
MD5

b67649a9a69b4891e75746f8ed5ffbec
SHA1

4d59dcf71f149fbd482e045bd58742d8589b7d4b
SHA256

9fbd44c68c8181d842e2553efc72b2f56324d638f56e2581b2db2ce53421d70f
SHA512

6edfb13376787e5a2f6fcfc5126421c60080c2504b48cad2b37cde73e441a66462220b6e2ca56e1223c864df0c2011c6244e5139b70744141fc6b59a60771e70
SSDEEP

24576:DP/kDXWkQpq97UrOPdDOBeWICivr9kDXWkQpq97UrOPdDOBeWICivp:DUm5pYI6PdDAeTvr2m5pYI6PdDAeTvp

Score

10^/10

purecrypter downloader loader

Malware Config

Extracted

Family

purecrypter

http://rssh.li/panel/uploads/Vvfilmvppec.dat

Signatures

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

Looks up external IP address via web service 1 IoCs

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

flow	ioc
13	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1780 set thread context of 1372	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	36

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
552	ipconfig.exe
944	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
520	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1780	b67649a9a69b4891e75746f8ed5ffbec.exe
Token: SeDebugPrivilege	520	powershell.exe
Token: SeDebugPrivilege	1372	b67649a9a69b4891e75746f8ed5ffbec.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 1780 wrote to memory of 468	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	28
PID 1780 wrote to memory of 468	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	28
PID 1780 wrote to memory of 468	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	28
PID 1780 wrote to memory of 468	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	28
PID 468 wrote to memory of 552	468	cmd.exe	30
PID 468 wrote to memory of 552	468	cmd.exe	30
PID 468 wrote to memory of 552	468	cmd.exe	30
PID 468 wrote to memory of 552	468	cmd.exe	30
PID 1780 wrote to memory of 520	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	31
PID 1780 wrote to memory of 520	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	31
PID 1780 wrote to memory of 520	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	31
PID 1780 wrote to memory of 520	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	31
PID 1780 wrote to memory of 1152	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	33
PID 1780 wrote to memory of 1152	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	33
PID 1780 wrote to memory of 1152	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	33
PID 1780 wrote to memory of 1152	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	33
PID 1152 wrote to memory of 944	1152	cmd.exe	35
PID 1152 wrote to memory of 944	1152	cmd.exe	35
PID 1152 wrote to memory of 944	1152	cmd.exe	35
PID 1152 wrote to memory of 944	1152	cmd.exe	35
PID 1780 wrote to memory of 1372	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	36
PID 1780 wrote to memory of 1372	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	36
PID 1780 wrote to memory of 1372	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	36
PID 1780 wrote to memory of 1372	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	36
PID 1780 wrote to memory of 1372	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	36
PID 1780 wrote to memory of 1372	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	36
PID 1780 wrote to memory of 1372	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	36
PID 1780 wrote to memory of 1372	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	36
PID 1780 wrote to memory of 1372	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	36
PID 1780 wrote to memory of 1372	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	36
PID 1780 wrote to memory of 1372	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	36
PID 1780 wrote to memory of 1372	1780	b67649a9a69b4891e75746f8ed5ffbec.exe	36

C:\Users\Admin\AppData\Local\Temp\b67649a9a69b4891e75746f8ed5ffbec.exe
"C:\Users\Admin\AppData\Local\Temp\b67649a9a69b4891e75746f8ed5ffbec.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1780
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c ipconfig/release
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:468
- - C:\Windows\SysWOW64\ipconfig.exe
    ipconfig /release
    3⤵
    - Gathers network information
    PID:552
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMQAyADAA
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:520
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c ipconfig/renew
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1152
- - C:\Windows\SysWOW64\ipconfig.exe
    ipconfig /renew
    3⤵
    - Gathers network information
    PID:944
- C:\Users\Admin\AppData\Local\Temp\b67649a9a69b4891e75746f8ed5ffbec.exe
  C:\Users\Admin\AppData\Local\Temp\b67649a9a69b4891e75746f8ed5ffbec.exe
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1372

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

T1059

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/520-63-0x000000006F120000-0x000000006F6CB000-memory.dmp

Filesize
5.7MB

Download
memory/520-65-0x000000006F120000-0x000000006F6CB000-memory.dmp

Filesize
5.7MB

Download
memory/520-64-0x000000006F120000-0x000000006F6CB000-memory.dmp

Filesize
5.7MB

Download
memory/1372-69-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1372-70-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1372-72-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1372-73-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1372-74-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1372-77-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1372-79-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1780-57-0x0000000000870000-0x000000000088C000-memory.dmp

Filesize
112KB

Download
memory/1780-56-0x0000000005970000-0x0000000005A24000-memory.dmp

Filesize
720KB

Download
memory/1780-54-0x0000000000D30000-0x0000000000D50000-memory.dmp

Filesize
128KB

Download
memory/1780-55-0x0000000075991000-0x0000000075993000-memory.dmp

Filesize
8KB

Download