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/1756-66-0x0000000006450000-0x00000000067F0000-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
896	voiceadequovl.exe
1756	voiceadequovl.exe

Loads dropped DLL 4 IoCs

pid	Process
896	voiceadequovl.exe
896	voiceadequovl.exe
896	voiceadequovl.exe
896	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
1964	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1756	voiceadequovl.exe
Token: SeDebugPrivilege	1964	powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 856 wrote to memory of 896	856	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe	27
PID 856 wrote to memory of 896	856	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe	27
PID 856 wrote to memory of 896	856	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe	27
PID 856 wrote to memory of 896	856	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe	27
PID 896 wrote to memory of 1756	896	voiceadequovl.exe	28
PID 896 wrote to memory of 1756	896	voiceadequovl.exe	28
PID 896 wrote to memory of 1756	896	voiceadequovl.exe	28
PID 896 wrote to memory of 1756	896	voiceadequovl.exe	28
PID 1756 wrote to memory of 1964	1756	voiceadequovl.exe	29
PID 1756 wrote to memory of 1964	1756	voiceadequovl.exe	29
PID 1756 wrote to memory of 1964	1756	voiceadequovl.exe	29
PID 1756 wrote to memory of 1964	1756	voiceadequovl.exe	29

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:856
- 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:896
- - 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:1756
  - - 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:1964

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

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Downloads

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\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
222.0MB

MD5
dee03006815a9ba6269bec665ff8dfeb

SHA1
f19bb01a6774699574105a8402bfc38c9f5aafc5

SHA256
11569a215faa3caa27bd61eddb56f89ec05d87795dd033054ff4787780c25675

SHA512
d3322f31c3f340a04c7a388d69c579c266a583fa1edfc7920ddce1efe2e09f45ba8be7eb815c7a55431cf434223e9d802bd7bcaf548cb432a6cb34c45926fbee

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

Filesize
211.8MB

MD5
9ed9651d012f3848dbdb36caf1be23e7

SHA1
940bd78348e453bdf0a56c8fbdb17e3d5365a526

SHA256
d09f066049fd3414c578612d7a41c7cba3be38d41ec250eb17644b36043b1d02

SHA512
d9e1fb6ca800203c7a53d9a28c146dabcd14d02fad97427d22ac002cc413bd84b487ad6793275567c5427fb5a85fae1211d6e2e7951decb5099d163db3ac1eb5

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

Filesize
187.3MB

MD5
f98392363e9e140573229440922e9941

SHA1
2434cf3818b1e2fd8ae7fcff1126e7f1a38e0b33

SHA256
19e5ef1b5c35edb5dc66281a4ea11a02c4ace9bd1df1130cec97988fd056e29d

SHA512
40140b4a5f7d27c6fcf4b60b884f229b75f16eb100a51c8e0af955267f72fa4d6b0c13b372cbc39231bf58e6b13957d10f03b17b47bb7fa89dddc5e88bb07373

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

Filesize
228.6MB

MD5
6bcb2b74b63fedd51b7437ee775480a0

SHA1
5e827cb85bd11cbd53046ec891b0626964bc6b25

SHA256
98cd6f5f795a610a999dcfea5dab6be8061ea8b81cc59b2805a17e21159dda1e

SHA512
d8855d973c671ca503174e80cd5dc39aa8cf0e45e6bec0ff2f7172535b3a794f14936a49422a60fd5c76547dfa820daf8122834fbbc025a737d7105201ce8237

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

Filesize
229.0MB

MD5
1058e6af7a12002968fe963af446b012

SHA1
e27121c5e338d09810db67bc318ee26eb6f3bd07

SHA256
c2b2d41f8dc1e9e3be9f8fc506c86fe3bac716896434788c789d3dfb064b7f09

SHA512
d8f758ac9b5e4b0b52a79f1e8e1b76d67f3417a3341cc5511b714a5269158ce8ad049e4372a15329ba1e4a8ad10aa533b3a1fadf7574815d7a8623fdb2d3bb11

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

Filesize
231.1MB

MD5
cd68fc2a7272eafedca4434d67cdff5d

SHA1
8a1c9bbef029e2c8ea061db600d32773ea742941

SHA256
66ae7bdf8386ce1fff1cf2e5f626852c44f32728517a2b13cfb2c3b24f5c99f2

SHA512
9f3412889fbf3b67645e2a3cc44069340baebd4c936c472f123116d9cb86aa149d5ca7e533d5ede955ded7f8d1ee0f65d895e7da71c204d24cf6c682636bad7c

Download Submit
memory/896-56-0x0000000075D01000-0x0000000075D03000-memory.dmp

Filesize
8KB

Download
memory/1756-65-0x00000000003B0000-0x0000000000B24000-memory.dmp

Filesize
7.5MB

Download
memory/1756-66-0x0000000006450000-0x00000000067F0000-memory.dmp

Filesize
3.6MB

Download
memory/1964-69-0x000000006FF50000-0x00000000704FB000-memory.dmp

Filesize
5.7MB

Download
memory/1964-70-0x000000006FF50000-0x00000000704FB000-memory.dmp

Filesize
5.7MB

Download

Analysis

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