purecrypter | 471d501162e2a5cb6aab3f4f5362ff843d05ef9f20d9fd7ea29733d3a9875747

General

Target

5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe
Size

3.6MB
MD5

36fd273ea7607d3a203f257f4e2649ed
SHA1

5e243f79ecb539d0d1f75fce7ddfedeccee70a48
SHA256

471d501162e2a5cb6aab3f4f5362ff843d05ef9f20d9fd7ea29733d3a9875747
SHA512

cf81163bc6d1f1141130fbe70944387b97d322afe837ad21a88a0be8f9fd87615bd7022cc572b1783871cc99f224258bae75855e805c733793b723ba0483597d
SSDEEP

98304:VQF9SqUKUehGS26Ish7MUTjA+1VFnqWXvqaY4:VSSzMGS26x1MUTM+/Fh

Score

10^/10

purecrypter downloader loader persistence

Malware Config

Signatures

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/1044-66-0x0000000006480000-0x0000000006820000-memory.dmp	family_purecrypter

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

Executes dropped EXE 2 IoCs

pid	Process
1792	voiceadequovl.exe
1044	voiceadequovl.exe

Loads dropped DLL 4 IoCs

pid	Process
1792	voiceadequovl.exe
1792	voiceadequovl.exe
1792	voiceadequovl.exe
1792	voiceadequovl.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe
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\\\""	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.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 1 IoCs

pid	Process
1920	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1044	voiceadequovl.exe
Token: SeDebugPrivilege	1920	powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1352 wrote to memory of 1792	1352	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe	28
PID 1352 wrote to memory of 1792	1352	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe	28
PID 1352 wrote to memory of 1792	1352	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe	28
PID 1352 wrote to memory of 1792	1352	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe	28
PID 1792 wrote to memory of 1044	1792	voiceadequovl.exe	29
PID 1792 wrote to memory of 1044	1792	voiceadequovl.exe	29
PID 1792 wrote to memory of 1044	1792	voiceadequovl.exe	29
PID 1792 wrote to memory of 1044	1792	voiceadequovl.exe	29
PID 1044 wrote to memory of 1920	1044	voiceadequovl.exe	30
PID 1044 wrote to memory of 1920	1044	voiceadequovl.exe	30
PID 1044 wrote to memory of 1920	1044	voiceadequovl.exe	30
PID 1044 wrote to memory of 1920	1044	voiceadequovl.exe	30

C:\Users\Admin\AppData\Local\Temp\5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe
"C:\Users\Admin\AppData\Local\Temp\5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1352
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\voiceadequovl.exe
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\voiceadequovl.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1792
- - C:\Users\Admin\AppData\Roaming\Voice\voiceadequovl.exe
    "C:\Users\Admin\AppData\Roaming\Voice\voiceadequovl.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1044
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMwA1AA==
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1920

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\voiceadequovl.exe

Filesize
265.2MB

MD5
43b35853aec156974a8a774edd76921e

SHA1
7a3c9b6582acca954882f5a1d3506e4e0a6a26c3

SHA256
511ace7768cf2c2e1d163fe3e264c10ef7a4c5514e53305a71230520a6c144d1

SHA512
ddfc7c929539ba3751f6c2fc4b9e6ea589cb9db94f7b09201bf4e05047ded9858893b94fe3d7129f4025c6e4cc2ecef7bf4f6fc557a8259465f4b864e7e57e74

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\voiceadequovl.exe

Filesize
365.5MB

MD5
ba50f2bca86ba947a8d2035bb9b35123

SHA1
a542b5c5d41174dc2475a219978123b7d14f958f

SHA256
17790c5c071280462ed8e617fd2edfff5bf0f40fb9add57f866f058fdbf24cb5

SHA512
08fdb619e411247c571710bc47df2463c95dc2fee82025e548b65ff1a3e4a53e663fafec9bcc5cc234f32211b25f6f9472786c1be543eb71629f32ec09f04379

Download Submit
C:\Users\Admin\AppData\Roaming\Voice\voiceadequovl.exe

Filesize
276.6MB

MD5
876e3aa319394c2aa7b509553628ae26

SHA1
bbe50398fe1ab6225cef98eeb8a9a3db8d01932f

SHA256
8b3427eb5f14d8f5ab14b064aef02b23b7771af3d8e3985351a82fcb90a9d6ea

SHA512
685a6ac62f173565052277f060454d5833c086488c384479f372dd8f2dd73653a009e612c09ddab58e82dde0428fbe45d0b52acc58831665017048f0ef0303eb

Download Submit
C:\Users\Admin\AppData\Roaming\Voice\voiceadequovl.exe

Filesize
276.6MB

MD5
0f9a28d3275fbcfc512cde3d4d8a067a

SHA1
bae156d10c64a28f9e1efc8ec47b73a2f33304a8

SHA256
26400181b6da3ef0d1cc6a51e04019141594491ccf157286a7df272ce2cc95f2

SHA512
b9e0efb3562cd522216026cdc6b2ce18ad50920cd7df418aebea971dfbfa6a72eaa7d92575b4ce8d1daa68281b3015611e7e6716284407a47f4891ab4655e3e6

Download Submit
\Users\Admin\AppData\Roaming\Voice\voiceadequovl.exe

Filesize
287.1MB

MD5
110700a9b719d2ab13474d7d9639a4f2

SHA1
768faca5e6b206d8165cd7a16f2a5d5773abd3b1

SHA256
1d5c101218e0dc6fdb0b08c27ee1c15d87625490af8c72a097b2a177ca4da786

SHA512
ab1fb81a3c18d79721aec9045528171e4a8681a65b8e6556f7b3cb0e704adc09f98ea735142c347057398bbf88c2b704186b0bec672d5f8dae3dc06055382803

Download Submit
\Users\Admin\AppData\Roaming\Voice\voiceadequovl.exe

Filesize
283.4MB

MD5
fcc7811a3639e4caaca70c5fb6ba14b0

SHA1
05b9e510d9456f3a6d29eb855871e5a70e184bfd

SHA256
a088465788c4c940d185840570b6355da138247d27b9e4aa90fb184b31f040cb

SHA512
55938d0b2ca6c86845093e8cb03ef33744bee74404e43438d623fcd3ccc9a0d66ca96d0894c418b07ceff1eba1be78248be8081b0672c4ccdc02d069897afa03

Download Submit
\Users\Admin\AppData\Roaming\Voice\voiceadequovl.exe

Filesize
282.6MB

MD5
282f0991487d5dc0ca237ce9230a8cd1

SHA1
9e422199551d864e506a23c4cdf09ffca4ae9f36

SHA256
3369a739852aafc2b7c05eac90c9335418258accc40ab6b225f7790f1cc2920c

SHA512
0130e2e6ed7f0190a5b39cb3a47935d9ca20ba539e697e04e86e4fa76d632225867940de8ac048da8d3ddbd62e04f904544de0a2c735064670f09e6bf4138692

Download Submit
\Users\Admin\AppData\Roaming\Voice\voiceadequovl.exe

Filesize
275.9MB

MD5
f03d76204f6021c458e8ce5a97c9e382

SHA1
00e95d2d4cf43003c95db68701c30190ac309764

SHA256
72a2cebe30bc8625b43b859ed22a6423c972852e139d1a38903f0d303b5a41c3

SHA512
3a6ca951dad09a75e770adc35ac6409a3b1117ea17986f52aa298cd900acc797dc01ea5a67da4e5b6916eeb2372b29b8efada727508d16eb22410c8e4b54f284

Download Submit
memory/1044-65-0x00000000009C0000-0x0000000001134000-memory.dmp

Filesize
7.5MB

Download
memory/1044-66-0x0000000006480000-0x0000000006820000-memory.dmp

Filesize
3.6MB

Download
memory/1792-56-0x00000000760A1000-0x00000000760A3000-memory.dmp

Filesize
8KB

Download
memory/1920-69-0x000000006FB00000-0x00000000700AB000-memory.dmp

Filesize
5.7MB

Download
memory/1920-70-0x000000006FB00000-0x00000000700AB000-memory.dmp

Filesize
5.7MB

Download
memory/1920-71-0x000000006FB00000-0x00000000700AB000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing