purecrypter | 4c7081148a218b609dca62b2ce1106e4a2e075671b0fb64352056cd6e58e7873

Analysis

max time kernel
148s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
05-11-2024 02:37

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General

Target

infected/Installer.exe
Size

677.9MB
MD5

3709aaf7e625bfd4dfef3ceba18ccc4a
SHA1

17fcf830d2cf2c4a016fb438cae8bf065cc55b24
SHA256

9440450e86e40c1116742e77b3e97ddb5c4d4d149d9c36d0e1e5c156ddb85cd1
SHA512

4ea3c2ef3226b7ed9adb966708b70dd79d6295ea603a23f34b6cada7346ce08bb2f95b2ff686ee922060ab387c5a22b34ee082d23f1d69ccf3fc46036c04c000
SSDEEP

3072:gahKyd2n31z5vWp1icKAArDZz4N9GhbkENEkYg6Au/TXlbodEgY:gahOCp0yN90vEXgMrXleEd

Score

10^/10

purecrypter discovery downloader loader persistence

Malware Config

Extracted

Family

purecrypter

https://falcaoliderfm.com.br/wp-admin/images/css/cover/bo/Jvizg.dll

Signatures

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
Purecrypter family
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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	dienetwoov.exe

Executes dropped EXE 2 IoCs

pid	Process
456	dienetwoov.exe
4028	dienetwoov.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	Installer.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 456 set thread context of 4028	456	dienetwoov.exe	107

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dienetwoov.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dienetwoov.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3676	powershell.exe
3676	powershell.exe
4524	powershell.exe
4524	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	456	dienetwoov.exe
Token: SeDebugPrivilege	3676	powershell.exe
Token: SeDebugPrivilege	4524	powershell.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2456 wrote to memory of 456	2456	Installer.exe	93
PID 2456 wrote to memory of 456	2456	Installer.exe	93
PID 2456 wrote to memory of 456	2456	Installer.exe	93
PID 456 wrote to memory of 3676	456	dienetwoov.exe	99
PID 456 wrote to memory of 3676	456	dienetwoov.exe	99
PID 456 wrote to memory of 3676	456	dienetwoov.exe	99
PID 456 wrote to memory of 1492	456	dienetwoov.exe	105
PID 456 wrote to memory of 1492	456	dienetwoov.exe	105
PID 456 wrote to memory of 1492	456	dienetwoov.exe	105
PID 456 wrote to memory of 4028	456	dienetwoov.exe	107
PID 456 wrote to memory of 4028	456	dienetwoov.exe	107
PID 456 wrote to memory of 4028	456	dienetwoov.exe	107
PID 456 wrote to memory of 4028	456	dienetwoov.exe	107
PID 456 wrote to memory of 4028	456	dienetwoov.exe	107
PID 456 wrote to memory of 4028	456	dienetwoov.exe	107
PID 456 wrote to memory of 4028	456	dienetwoov.exe	107
PID 456 wrote to memory of 4028	456	dienetwoov.exe	107
PID 1492 wrote to memory of 4524	1492	cmd.exe	108
PID 1492 wrote to memory of 4524	1492	cmd.exe	108
PID 1492 wrote to memory of 4524	1492	cmd.exe	108

C:\Users\Admin\AppData\Local\Temp\infected\Installer.exe
"C:\Users\Admin\AppData\Local\Temp\infected\Installer.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2456
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\dienetwoov.exe
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\dienetwoov.exe
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:456
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMwA3AA==
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3676
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c powershell -ENC cwBlAHQALQBtAHAAcAByAGUAZgBlAHIAZQBuAGMAZQAgAC0AZQB4AGMAbAB1AHMAaQBvAG4AcABhAHQAaAAgAEMAOgBcAA==
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1492
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -ENC cwBlAHQALQBtAHAAcAByAGUAZgBlAHIAZQBuAGMAZQAgAC0AZQB4AGMAbAB1AHMAaQBvAG4AcABhAHQAaAAgAEMAOgBcAA==
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4524
- - C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\dienetwoov.exe
    C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\dienetwoov.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4028

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
1KB

MD5
4280e36a29fa31c01e4d8b2ba726a0d8

SHA1
c485c2c9ce0a99747b18d899b71dfa9a64dabe32

SHA256
e2486a1bdcba80dad6dd6210d7374bd70ae196a523c06ceda71370fd3ea78359

SHA512
494fe5f0ade03669e5830bed93c964d69b86629440148d7b0881cf53203fd89443ebff9b4d1ee9d96244f62af6edede622d9eacba37f80f389a0d522e4ad4ea4

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache

Filesize
53KB

MD5
06ad34f9739c5159b4d92d702545bd49

SHA1
9152a0d4f153f3f40f7e606be75f81b582ee0c17

SHA256
474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba

SHA512
c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
16KB

MD5
adfbebb5f67738b951933b7c53cd169f

SHA1
b3d203a126c5df2b0bbfd5dfd945b311bbaa52a4

SHA256
f9d28ff69f810139dc13b0998af8702be2d7e8c9722d69d89c623c5fb72cdb20

SHA512
efc9e58a23e2c539312821b96dd1a1c5d571b4db4d98eeca90caa39ebfaef03774324084a9920784d6f6a817d1601e61001b7d711d829221360119fecb8eb3c3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_m4gsjywx.adm.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/456-15-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-13-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-9-0x00000000052F0000-0x00000000052FA000-memory.dmp

Filesize
40KB

Download
memory/456-10-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/456-7-0x00000000058E0000-0x0000000005E84000-memory.dmp

Filesize
5.6MB

Download
memory/456-55-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-12-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-21-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-73-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-71-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-69-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-67-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-65-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-63-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-61-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-59-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-57-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-53-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-51-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-49-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-47-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-45-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-43-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-41-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-37-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-35-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-33-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-75-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-31-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-29-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-27-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-25-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-19-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-17-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-39-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-8-0x0000000005220000-0x00000000052B2000-memory.dmp

Filesize
584KB

Download
memory/456-11-0x0000000007480000-0x000000000751A000-memory.dmp

Filesize
616KB

Download
memory/456-23-0x0000000007480000-0x0000000007515000-memory.dmp

Filesize
596KB

Download
memory/456-642-0x0000000007650000-0x00000000076E2000-memory.dmp

Filesize
584KB

Download
memory/456-643-0x0000000007710000-0x0000000007732000-memory.dmp

Filesize
136KB

Download
memory/456-644-0x0000000007740000-0x0000000007A94000-memory.dmp

Filesize
3.3MB

Download
memory/456-665-0x000000007451E000-0x000000007451F000-memory.dmp

Filesize
4KB

Download
memory/456-666-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/456-676-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/456-5-0x000000007451E000-0x000000007451F000-memory.dmp

Filesize
4KB

Download
memory/456-6-0x0000000000980000-0x0000000000988000-memory.dmp

Filesize
32KB

Download
memory/3676-662-0x0000000005E90000-0x0000000005EDC000-memory.dmp

Filesize
304KB

Download
memory/3676-646-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/3676-649-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/3676-650-0x0000000005060000-0x00000000050C6000-memory.dmp

Filesize
408KB

Download
memory/3676-651-0x00000000050D0000-0x0000000005136000-memory.dmp

Filesize
408KB

Download
memory/3676-661-0x0000000005E60000-0x0000000005E7E000-memory.dmp

Filesize
120KB

Download
memory/3676-645-0x0000000002590000-0x00000000025C6000-memory.dmp

Filesize
216KB

Download
memory/3676-663-0x00000000076D0000-0x0000000007D4A000-memory.dmp

Filesize
6.5MB

Download
memory/3676-664-0x0000000006390000-0x00000000063AA000-memory.dmp

Filesize
104KB

Download
memory/3676-667-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/3676-671-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/3676-648-0x00000000051E0000-0x0000000005808000-memory.dmp

Filesize
6.2MB

Download
memory/3676-647-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/4524-710-0x00000000078C0000-0x00000000078C8000-memory.dmp

Filesize
32KB

Download
memory/4524-705-0x0000000007980000-0x0000000007A16000-memory.dmp

Filesize
600KB

Download
memory/4524-702-0x0000000006920000-0x000000000693E000-memory.dmp

Filesize
120KB

Download
memory/4524-692-0x000000006FEE0000-0x000000006FF2C000-memory.dmp

Filesize
304KB

Download
memory/4524-691-0x0000000007550000-0x0000000007582000-memory.dmp

Filesize
200KB

Download
memory/4524-703-0x0000000007630000-0x00000000076D3000-memory.dmp

Filesize
652KB

Download
memory/4524-704-0x0000000007750000-0x000000000775A000-memory.dmp

Filesize
40KB

Download
memory/4524-689-0x00000000068D0000-0x000000000691C000-memory.dmp

Filesize
304KB

Download
memory/4524-706-0x00000000061D0000-0x00000000061E1000-memory.dmp

Filesize
68KB

Download
memory/4524-707-0x0000000006200000-0x000000000620E000-memory.dmp

Filesize
56KB

Download
memory/4524-708-0x0000000007730000-0x0000000007744000-memory.dmp

Filesize
80KB

Download
memory/4524-709-0x00000000078E0000-0x00000000078FA000-memory.dmp

Filesize
104KB

Download
memory/4524-678-0x0000000005D00000-0x0000000006054000-memory.dmp

Filesize
3.3MB

Download