purecrypter | 95dd221630d172703a90842a31b0e25a97f98c236e7a4cc09e5dc5862d8d0370

Analysis

max time kernel
42s
max time network
45s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
26/01/2023, 22:50

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General

Target

tmp786A.tmp.exe
Size

2.7MB
MD5

e0a5c7191e00ea683c4e73b1c80b8823
SHA1

8349e708101ba87a868fcf7cb4d00b91f1620ff6
SHA256

95dd221630d172703a90842a31b0e25a97f98c236e7a4cc09e5dc5862d8d0370
SHA512

1f2c10f8205952f613f406d7ea1c4d4bcdf6c71286ca4db859e3a131b4ee30af86f0e35cbcd58e3cd2d8f05a7e4a5be4dede910980b0afbfc44b7fea4d9224fa
SSDEEP

49152:QeTuAoMnEHz/oiGhEjE0rzsK+/pWOjrz7Tt5CuU7LHkeimyVfC:Qcu+ozq6sK+sOjrKLH7Z

Score

10^/10

purecrypter downloader loader persistence

Malware Config

Signatures

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/1972-55-0x0000000004A60000-0x0000000004D14000-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\Gzltzqrlzsv = "\"C:\\Users\\Admin\\AppData\\Roaming\\Quhaolav\\Gzltzqrlzsv.exe\""	tmp786A.tmp.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
616	powershell.exe
1972	tmp786A.tmp.exe
1972	tmp786A.tmp.exe
1972	tmp786A.tmp.exe
1972	tmp786A.tmp.exe
1972	tmp786A.tmp.exe
1972	tmp786A.tmp.exe
1972	tmp786A.tmp.exe
1972	tmp786A.tmp.exe
1972	tmp786A.tmp.exe
1972	tmp786A.tmp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1972	tmp786A.tmp.exe
Token: SeDebugPrivilege	616	powershell.exe

Suspicious use of WriteProcessMemory 44 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 616	1972	tmp786A.tmp.exe	27
PID 1972 wrote to memory of 616	1972	tmp786A.tmp.exe	27
PID 1972 wrote to memory of 616	1972	tmp786A.tmp.exe	27
PID 1972 wrote to memory of 616	1972	tmp786A.tmp.exe	27
PID 1972 wrote to memory of 556	1972	tmp786A.tmp.exe	30
PID 1972 wrote to memory of 556	1972	tmp786A.tmp.exe	30
PID 1972 wrote to memory of 556	1972	tmp786A.tmp.exe	30
PID 1972 wrote to memory of 556	1972	tmp786A.tmp.exe	30
PID 1972 wrote to memory of 796	1972	tmp786A.tmp.exe	31
PID 1972 wrote to memory of 796	1972	tmp786A.tmp.exe	31
PID 1972 wrote to memory of 796	1972	tmp786A.tmp.exe	31
PID 1972 wrote to memory of 796	1972	tmp786A.tmp.exe	31
PID 1972 wrote to memory of 1064	1972	tmp786A.tmp.exe	32
PID 1972 wrote to memory of 1064	1972	tmp786A.tmp.exe	32
PID 1972 wrote to memory of 1064	1972	tmp786A.tmp.exe	32
PID 1972 wrote to memory of 1064	1972	tmp786A.tmp.exe	32
PID 1972 wrote to memory of 432	1972	tmp786A.tmp.exe	33
PID 1972 wrote to memory of 432	1972	tmp786A.tmp.exe	33
PID 1972 wrote to memory of 432	1972	tmp786A.tmp.exe	33
PID 1972 wrote to memory of 432	1972	tmp786A.tmp.exe	33
PID 1972 wrote to memory of 792	1972	tmp786A.tmp.exe	34
PID 1972 wrote to memory of 792	1972	tmp786A.tmp.exe	34
PID 1972 wrote to memory of 792	1972	tmp786A.tmp.exe	34
PID 1972 wrote to memory of 792	1972	tmp786A.tmp.exe	34
PID 1972 wrote to memory of 1880	1972	tmp786A.tmp.exe	35
PID 1972 wrote to memory of 1880	1972	tmp786A.tmp.exe	35
PID 1972 wrote to memory of 1880	1972	tmp786A.tmp.exe	35
PID 1972 wrote to memory of 1880	1972	tmp786A.tmp.exe	35
PID 1972 wrote to memory of 968	1972	tmp786A.tmp.exe	36
PID 1972 wrote to memory of 968	1972	tmp786A.tmp.exe	36
PID 1972 wrote to memory of 968	1972	tmp786A.tmp.exe	36
PID 1972 wrote to memory of 968	1972	tmp786A.tmp.exe	36
PID 1972 wrote to memory of 1352	1972	tmp786A.tmp.exe	37
PID 1972 wrote to memory of 1352	1972	tmp786A.tmp.exe	37
PID 1972 wrote to memory of 1352	1972	tmp786A.tmp.exe	37
PID 1972 wrote to memory of 1352	1972	tmp786A.tmp.exe	37
PID 1972 wrote to memory of 972	1972	tmp786A.tmp.exe	38
PID 1972 wrote to memory of 972	1972	tmp786A.tmp.exe	38
PID 1972 wrote to memory of 972	1972	tmp786A.tmp.exe	38
PID 1972 wrote to memory of 972	1972	tmp786A.tmp.exe	38
PID 1972 wrote to memory of 1620	1972	tmp786A.tmp.exe	39
PID 1972 wrote to memory of 1620	1972	tmp786A.tmp.exe	39
PID 1972 wrote to memory of 1620	1972	tmp786A.tmp.exe	39
PID 1972 wrote to memory of 1620	1972	tmp786A.tmp.exe	39

C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1972
- 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:616
- C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  2⤵
  PID:556
- C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  2⤵
  PID:796
- C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  2⤵
  PID:1064
- C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  2⤵
  PID:432
- C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  2⤵
  PID:792
- C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  2⤵
  PID:1880
- C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  2⤵
  PID:968
- C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  2⤵
  PID:1352
- C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  2⤵
  PID:972
- C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  C:\Users\Admin\AppData\Local\Temp\tmp786A.tmp.exe
  2⤵
  PID:1620

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/616-59-0x00000000700D0000-0x000000007067B000-memory.dmp

Filesize
5.7MB

Download
memory/616-60-0x00000000700D0000-0x000000007067B000-memory.dmp

Filesize
5.7MB

Download
memory/616-61-0x00000000700D0000-0x000000007067B000-memory.dmp

Filesize
5.7MB

Download
memory/1972-54-0x0000000000210000-0x00000000004C4000-memory.dmp

Filesize
2.7MB

Download
memory/1972-55-0x0000000004A60000-0x0000000004D14000-memory.dmp

Filesize
2.7MB

Download
memory/1972-56-0x0000000075CF1000-0x0000000075CF3000-memory.dmp

Filesize
8KB

Download
memory/1972-62-0x0000000005700000-0x0000000005796000-memory.dmp

Filesize
600KB

Download