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/1108-66-0x0000000006450000-0x00000000067F0000-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
1452	voiceadequovl.exe
1108	voiceadequovl.exe

Loads dropped DLL 4 IoCs

pid	Process
1452	voiceadequovl.exe
1452	voiceadequovl.exe
1452	voiceadequovl.exe
1452	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
892	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1108	voiceadequovl.exe
Token: SeDebugPrivilege	892	powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 1452	1972	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe	28
PID 1972 wrote to memory of 1452	1972	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe	28
PID 1972 wrote to memory of 1452	1972	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe	28
PID 1972 wrote to memory of 1452	1972	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe	28
PID 1452 wrote to memory of 1108	1452	voiceadequovl.exe	29
PID 1452 wrote to memory of 1108	1452	voiceadequovl.exe	29
PID 1452 wrote to memory of 1108	1452	voiceadequovl.exe	29
PID 1452 wrote to memory of 1108	1452	voiceadequovl.exe	29
PID 1108 wrote to memory of 892	1108	voiceadequovl.exe	30
PID 1108 wrote to memory of 892	1108	voiceadequovl.exe	30
PID 1108 wrote to memory of 892	1108	voiceadequovl.exe	30
PID 1108 wrote to memory of 892	1108	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:1972
- 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:1452
- - 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:1108
  - - 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:892

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
196.1MB

MD5
2b3272a5a57adff7ae4882648c2552cf

SHA1
0f5db3c3a5e69493b002848cf8a7ed9fdfe713d9

SHA256
80994dff9c8efb12e2dba3b9720f5d4ee425c093158bfa7d38f05590d7dee328

SHA512
187ec45c9d1e30cb30a4185b3dc2e1a041b57eb468cee9b440fd0c2bf1ac3eb51abb67a005c56b4a42b70dc448bf8d0dc261ac26ab89c3796d77e5f760b05ded

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

Filesize
177.2MB

MD5
623d94c304bca7fb16f44dcec4b2ef9c

SHA1
107eb01604f8d5565632a369d084e741fddb4937

SHA256
b2d768f223101703c4c7467e88d4397d1c3805d8da7bb45f64ae2d958115994b

SHA512
42f1708b8b6598e3f603ec750b0a4cae9366eaf9b8fd3633bf759165304e905ddcdf6e0aa2b4512c50b9b667c71b0dc1c0e41f757825bda7517bdfd317f77207

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

Filesize
231.1MB

MD5
cd68fc2a7272eafedca4434d67cdff5d

SHA1
8a1c9bbef029e2c8ea061db600d32773ea742941

SHA256
66ae7bdf8386ce1fff1cf2e5f626852c44f32728517a2b13cfb2c3b24f5c99f2

SHA512
9f3412889fbf3b67645e2a3cc44069340baebd4c936c472f123116d9cb86aa149d5ca7e533d5ede955ded7f8d1ee0f65d895e7da71c204d24cf6c682636bad7c

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

Filesize
222.6MB

MD5
caf5bafdf0422d432fda72049d09df73

SHA1
644040159226bbff60f5d748584e9d45a871a209

SHA256
bf53bb348d1d9759e831fc7626781c365a111175203c3afd89b79130c81c9e6c

SHA512
684804397c0454d5a83084e86102d78adfc5963e602368c53bb72cdfc568f746515f7f4c5c5b1600883116cd50ea920aa8bfe3e723d4953c8395b837011f24ba

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
227.1MB

MD5
a349e52b02efac0a1a99991b39ce49c7

SHA1
9ffa7bd39fc13a668212c8caca13b7de7c2b1e1c

SHA256
f8904a6e15b1707e1c187b97acea3568abedd38be2b822600af703a48a4e700e

SHA512
4b48e5528163555a941c65b8444d6dfd5ea546f854e8528347973dc959f17e221fee15c6c37c41986f750d652ebbae5601bfa0abfb8987c60704725c7369c7b3

Download Submit
memory/892-69-0x000000006F640000-0x000000006FBEB000-memory.dmp

Filesize
5.7MB

Download
memory/892-70-0x000000006F640000-0x000000006FBEB000-memory.dmp

Filesize
5.7MB

Download
memory/1108-65-0x00000000003B0000-0x0000000000B24000-memory.dmp

Filesize
7.5MB

Download
memory/1108-66-0x0000000006450000-0x00000000067F0000-memory.dmp

Filesize
3.6MB

Download
memory/1452-56-0x0000000075981000-0x0000000075983000-memory.dmp

Filesize
8KB

Download

Analysis

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