purecrypter | 464bf35525b6f482b91e5a1ba287c58304e7c41558c8070e42bdaa19769b5b05

Analysis

max time kernel
43s
max time network
46s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
03/02/2023, 19:19

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General

Target

SMGS.exe
Size

4.8MB
MD5

973d6bb15efd90c87c861bb50682b4e0
SHA1

6be806023c19d7b332118bdc60ec2cabf4afd7a7
SHA256

464bf35525b6f482b91e5a1ba287c58304e7c41558c8070e42bdaa19769b5b05
SHA512

02355d9053c02c7470cdf6bde0a7d30ddf8a15a98c70dedf67a44639db3f92f1f961cb887e262b91eaeaeeef406e83c1294c690165afe2d7b50bae2e13896237
SSDEEP

24576:VBgHFLM9d5M7WbzMdMp+5R6hIONsEQ/xWxPNnb1T/d+BIPFsKmQhhEG6veOSV1jF:

Score

10^/10

purecrypter downloader loader persistence

Malware Config

Signatures

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/1952-55-0x0000000006180000-0x00000000063E6000-memory.dmp	family_purecrypter

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

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\Zzycvoloo = "\"C:\\Users\\Admin\\AppData\\Roaming\\Nqtsofal\\Zzycvoloo.exe\""	SMGS.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 11 IoCs

pid	Process
828	powershell.exe
1952	SMGS.exe
1952	SMGS.exe
1952	SMGS.exe
1952	SMGS.exe
1952	SMGS.exe
1952	SMGS.exe
1952	SMGS.exe
1952	SMGS.exe
1952	SMGS.exe
1952	SMGS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1952	SMGS.exe
Token: SeDebugPrivilege	828	powershell.exe

Suspicious use of WriteProcessMemory 44 IoCs

description	pid	Process	procid_target
PID 1952 wrote to memory of 828	1952	SMGS.exe	28
PID 1952 wrote to memory of 828	1952	SMGS.exe	28
PID 1952 wrote to memory of 828	1952	SMGS.exe	28
PID 1952 wrote to memory of 828	1952	SMGS.exe	28
PID 1952 wrote to memory of 1700	1952	SMGS.exe	30
PID 1952 wrote to memory of 1700	1952	SMGS.exe	30
PID 1952 wrote to memory of 1700	1952	SMGS.exe	30
PID 1952 wrote to memory of 1700	1952	SMGS.exe	30
PID 1952 wrote to memory of 1176	1952	SMGS.exe	31
PID 1952 wrote to memory of 1176	1952	SMGS.exe	31
PID 1952 wrote to memory of 1176	1952	SMGS.exe	31
PID 1952 wrote to memory of 1176	1952	SMGS.exe	31
PID 1952 wrote to memory of 1144	1952	SMGS.exe	32
PID 1952 wrote to memory of 1144	1952	SMGS.exe	32
PID 1952 wrote to memory of 1144	1952	SMGS.exe	32
PID 1952 wrote to memory of 1144	1952	SMGS.exe	32
PID 1952 wrote to memory of 564	1952	SMGS.exe	33
PID 1952 wrote to memory of 564	1952	SMGS.exe	33
PID 1952 wrote to memory of 564	1952	SMGS.exe	33
PID 1952 wrote to memory of 564	1952	SMGS.exe	33
PID 1952 wrote to memory of 888	1952	SMGS.exe	34
PID 1952 wrote to memory of 888	1952	SMGS.exe	34
PID 1952 wrote to memory of 888	1952	SMGS.exe	34
PID 1952 wrote to memory of 888	1952	SMGS.exe	34
PID 1952 wrote to memory of 1084	1952	SMGS.exe	35
PID 1952 wrote to memory of 1084	1952	SMGS.exe	35
PID 1952 wrote to memory of 1084	1952	SMGS.exe	35
PID 1952 wrote to memory of 1084	1952	SMGS.exe	35
PID 1952 wrote to memory of 1436	1952	SMGS.exe	36
PID 1952 wrote to memory of 1436	1952	SMGS.exe	36
PID 1952 wrote to memory of 1436	1952	SMGS.exe	36
PID 1952 wrote to memory of 1436	1952	SMGS.exe	36
PID 1952 wrote to memory of 908	1952	SMGS.exe	37
PID 1952 wrote to memory of 908	1952	SMGS.exe	37
PID 1952 wrote to memory of 908	1952	SMGS.exe	37
PID 1952 wrote to memory of 908	1952	SMGS.exe	37
PID 1952 wrote to memory of 892	1952	SMGS.exe	38
PID 1952 wrote to memory of 892	1952	SMGS.exe	38
PID 1952 wrote to memory of 892	1952	SMGS.exe	38
PID 1952 wrote to memory of 892	1952	SMGS.exe	38
PID 1952 wrote to memory of 336	1952	SMGS.exe	39
PID 1952 wrote to memory of 336	1952	SMGS.exe	39
PID 1952 wrote to memory of 336	1952	SMGS.exe	39
PID 1952 wrote to memory of 336	1952	SMGS.exe	39

C:\Users\Admin\AppData\Local\Temp\SMGS.exe
"C:\Users\Admin\AppData\Local\Temp\SMGS.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1952
- 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:828
- C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  2⤵
  PID:1700
- C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  2⤵
  PID:1176
- C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  2⤵
  PID:1144
- C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  2⤵
  PID:564
- C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  2⤵
  PID:888
- C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  2⤵
  PID:1084
- C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  2⤵
  PID:1436
- C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  2⤵
  PID:908
- C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  2⤵
  PID:892
- C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  C:\Users\Admin\AppData\Local\Temp\SMGS.exe
  2⤵
  PID:336

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/828-57-0x0000000075E31000-0x0000000075E33000-memory.dmp

Filesize
8KB

Download
memory/828-58-0x000000006FCC0000-0x000000007026B000-memory.dmp

Filesize
5.7MB

Download
memory/828-59-0x000000006FCC0000-0x000000007026B000-memory.dmp

Filesize
5.7MB

Download
memory/828-60-0x000000006FCC0000-0x000000007026B000-memory.dmp

Filesize
5.7MB

Download
memory/1952-54-0x00000000000B0000-0x0000000000578000-memory.dmp

Filesize
4.8MB

Download
memory/1952-55-0x0000000006180000-0x00000000063E6000-memory.dmp

Filesize
2.4MB

Download
memory/1952-61-0x0000000004F40000-0x0000000004F8A000-memory.dmp

Filesize
296KB

Download