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/472-66-0x00000000064C0000-0x0000000006860000-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
1364	voiceadequovl.exe
472	voiceadequovl.exe

Loads dropped DLL 4 IoCs

pid	Process
1364	voiceadequovl.exe
1364	voiceadequovl.exe
1364	voiceadequovl.exe
1364	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
1832	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	472	voiceadequovl.exe
Token: SeDebugPrivilege	1832	powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1532 wrote to memory of 1364	1532	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe	28
PID 1532 wrote to memory of 1364	1532	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe	28
PID 1532 wrote to memory of 1364	1532	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe	28
PID 1532 wrote to memory of 1364	1532	5e243f79ecb539d0d1f75fce7ddfedeccee70a48.exe	28
PID 1364 wrote to memory of 472	1364	voiceadequovl.exe	29
PID 1364 wrote to memory of 472	1364	voiceadequovl.exe	29
PID 1364 wrote to memory of 472	1364	voiceadequovl.exe	29
PID 1364 wrote to memory of 472	1364	voiceadequovl.exe	29
PID 472 wrote to memory of 1832	472	voiceadequovl.exe	30
PID 472 wrote to memory of 1832	472	voiceadequovl.exe	30
PID 472 wrote to memory of 1832	472	voiceadequovl.exe	30
PID 472 wrote to memory of 1832	472	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:1532
- 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:1364
- - 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:472
  - - 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:1832

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
259.6MB

MD5
f8f63fc7ac3af765536893c2dc672a51

SHA1
754843a7d02719a82416a0173c97083695648a4e

SHA256
42013f419512ad2f72c4638865d14eb2ca34c39e71d975154e08b1103d867c1a

SHA512
8d32f9ec754a7122188baf3db310bb529280d69862cad709acab4532b32a3b5c4c999e909e2c3f4b30f0b9939a9d16756d695ff9821526346ed6bb07229d5e4b

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

Filesize
259.2MB

MD5
9f1700be5319ae7be6852dec17da1da1

SHA1
15d818206965c8945f86c3b39a79c67fb9fabe18

SHA256
509bb4ad5afac46d14a082b39e57f383f0799a0b8076c9448a5b847dcba6da62

SHA512
eaea0ffba7935b4251bdc92d9a2e3ec34e33e7dc0baa1b0ae7894c46348b829f504f76549b29fb1e8e29a69f1336332efbcd06afe823fdda52346d12f90cea08

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

Filesize
263.4MB

MD5
c26c1b256f0c886deb8bf4dc16c037bc

SHA1
8035226c9e66de18b136945d5e0e7df8f24febbb

SHA256
ee4e4285238f761eacb5905ef1a4d621bcef5baf33c92234a763db4ab78a22cd

SHA512
bd49034b601eed72882a8b5342db8af1be85c2714acb9a3af40167c27914f13e2181f5ed4eeaaa5b44950d436cd8d37947242615a6803f340b2650be5fc25ff5

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

Filesize
245.9MB

MD5
e8f93061ac858cfefc8a4207ca739851

SHA1
32c66006f7bb93163d9c40993c5ea589e5477c55

SHA256
acc48cc585c392d43d5fa02c682af64c3e73ec91ecf923d49729834049962d32

SHA512
fc64c12c8fcc76ad45f4835c4663beefe5970dbe2a0d44c662ed676ccac3980b99705a6ba166d9f97f5d351016f44ecc7ca6e4fb69e4726c4941bdffb0181038

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

Filesize
233.8MB

MD5
57c28db521b7cf91dccb39440cd49137

SHA1
383999655365e948faad0d52ec98ffea2e9510e3

SHA256
0bccb0e1b005d2da7c773ab27e6d33ae613be920de41b2f45ee265b6dfc3ea7e

SHA512
ddf59fc4dfd5a7268d23f7783f7e0681a0a7ad7c53137e2fd27523d2e5c5038c867d448610c339d0c88e53332436335932d6194f39e27a1f8d89357de01fb5e9

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

Filesize
259.9MB

MD5
a033480d74158d5c22a7e69f067f2cee

SHA1
522a5f352816c00b1e221dce48ec2b527ff2c576

SHA256
d595e7d830f161145ed539b065b26222462319baa9af3a4929a4931d7a04f061

SHA512
a9eaee63e9abf70db1e42ef348238513b358ea0dc06b013d668b5c5e36629bfed6228ed01f3d57491d31bfb92fc85e844d128f1176520204cbc20c4091feaf40

Download Submit
memory/472-65-0x0000000000AF0000-0x0000000001264000-memory.dmp

Filesize
7.5MB

Download
memory/472-66-0x00000000064C0000-0x0000000006860000-memory.dmp

Filesize
3.6MB

Download
memory/1364-56-0x0000000075611000-0x0000000075613000-memory.dmp

Filesize
8KB

Download
memory/1832-69-0x000000006F6B0000-0x000000006FC5B000-memory.dmp

Filesize
5.7MB

Download
memory/1832-70-0x000000006F6B0000-0x000000006FC5B000-memory.dmp

Filesize
5.7MB

Download
memory/1832-71-0x000000006F6B0000-0x000000006FC5B000-memory.dmp

Filesize
5.7MB

Download

Analysis

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