purecrypter | 0e75d1b5b9113f26227b5a16dd13b5bcbbb31cddadf7558536227e2599d8e90b

Analysis

max time kernel
148s
max time network
143s
platform
windows7_x64
resource
win7-20220718-en
resource tags

arch:x64arch:x86image:win7-20220718-enlocale:en-usos:windows7-x64system
submitted
23/07/2022, 04:27

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General

Target

f7882ab56428fbde316becaebfa0939e.exe
Size

15.1MB
MD5

f7882ab56428fbde316becaebfa0939e
SHA1

579bfdb1f18cdcbb7fcb08d3988bf53dbb1011bb
SHA256

0e75d1b5b9113f26227b5a16dd13b5bcbbb31cddadf7558536227e2599d8e90b
SHA512

cfc33a7edec1eb80d680f3fb3e7d3b187e7eb4401463e24750a597f5d25c29d30bbefaf5338e6c13fa21001796e737c7212c6339eb0d4de149659abb0fe051f6

Score

10^/10

purecrypter loader persistence trojan

Malware Config

Signatures

Detect PureCrypter loader 2 IoCs

loader

resource	yara_rule
behavioral1/memory/1028-55-0x0000000020F10000-0x000000002150A000-memory.dmp	family_purecrypter
behavioral1/memory/1532-73-0x000000001F440000-0x000000001F9CC000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a loader which is intended for downloading and executing additional payloads.
trojan loader purecrypter

Executes dropped EXE 2 IoCs

pid	Process
1532	Wuoudwmrceeq.exe
1196	Wrxuaatupdate-kmv.exe

Loads dropped DLL 2 IoCs

pid	Process
1028	f7882ab56428fbde316becaebfa0939e.exe
1532	Wuoudwmrceeq.exe

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-1-5-21-4084403625-2215941253-1760665084-1000\Software\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "\"C:\\Users\\Admin\\AppData\\Roaming\\Mcvksfoe\\RuntimeBroker.exe\""	Wuoudwmrceeq.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: AddClipboardFormatListener 1 IoCs

pid	Process
1532	Wuoudwmrceeq.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1696	powershell.exe
1028	f7882ab56428fbde316becaebfa0939e.exe
1028	f7882ab56428fbde316becaebfa0939e.exe
1884	powershell.exe
1244	Explorer.EXE
1244	Explorer.EXE
1532	Wuoudwmrceeq.exe
1928	powershell.exe
1244	Explorer.EXE
1244	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	1028	f7882ab56428fbde316becaebfa0939e.exe
Token: SeDebugPrivilege	1696	powershell.exe
Token: SeDebugPrivilege	1532	Wuoudwmrceeq.exe
Token: SeDebugPrivilege	1884	powershell.exe
Token: SeDebugPrivilege	1244	Explorer.EXE
Token: SeDebugPrivilege	1196	Wrxuaatupdate-kmv.exe
Token: SeDebugPrivilege	1928	powershell.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1028 wrote to memory of 1696	1028	f7882ab56428fbde316becaebfa0939e.exe	28
PID 1028 wrote to memory of 1696	1028	f7882ab56428fbde316becaebfa0939e.exe	28
PID 1028 wrote to memory of 1696	1028	f7882ab56428fbde316becaebfa0939e.exe	28
PID 1028 wrote to memory of 1532	1028	f7882ab56428fbde316becaebfa0939e.exe	31
PID 1028 wrote to memory of 1532	1028	f7882ab56428fbde316becaebfa0939e.exe	31
PID 1028 wrote to memory of 1532	1028	f7882ab56428fbde316becaebfa0939e.exe	31
PID 1028 wrote to memory of 1244	1028	f7882ab56428fbde316becaebfa0939e.exe	16
PID 1532 wrote to memory of 1884	1532	Wuoudwmrceeq.exe	32
PID 1532 wrote to memory of 1884	1532	Wuoudwmrceeq.exe	32
PID 1532 wrote to memory of 1884	1532	Wuoudwmrceeq.exe	32
PID 1532 wrote to memory of 1196	1532	Wuoudwmrceeq.exe	34
PID 1532 wrote to memory of 1196	1532	Wuoudwmrceeq.exe	34
PID 1532 wrote to memory of 1196	1532	Wuoudwmrceeq.exe	34
PID 1196 wrote to memory of 1928	1196	Wrxuaatupdate-kmv.exe	35
PID 1196 wrote to memory of 1928	1196	Wrxuaatupdate-kmv.exe	35
PID 1196 wrote to memory of 1928	1196	Wrxuaatupdate-kmv.exe	35

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1244
- C:\Users\Admin\AppData\Local\Temp\f7882ab56428fbde316becaebfa0939e.exe
  "C:\Users\Admin\AppData\Local\Temp\f7882ab56428fbde316becaebfa0939e.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1028
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANAA1AA==
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1696
- - C:\Users\Admin\AppData\Local\Temp\Wuoudwmrceeq.exe
    "C:\Users\Admin\AppData\Local\Temp\Wuoudwmrceeq.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Adds Run key to start application
    - Suspicious behavior: AddClipboardFormatListener
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1532
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANAA1AA==
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1884
  - - C:\Users\Admin\AppData\Local\Temp\Wrxuaatupdate-kmv.exe
      "C:\Users\Admin\AppData\Local\Temp\Wrxuaatupdate-kmv.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1196
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANAA1AA==
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1928

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

C:\Users\Admin\AppData\Local\Temp\Wrxuaatupdate-kmv.exe

Filesize
5.1MB

MD5
548b3c083dc843150679970cb38d6144

SHA1
a27b8bf86f4d79d4317d0096412ef2cca585e431

SHA256
57c94104863dae72ca86c7e0e177b8197b782ce729a1314a7791a4070748a3d5

SHA512
4860fc8085aa4663c0ec69648cfe482642403faa30aa0571fc218ebec42b18a40ee9e3e3dbe877d62c8215b82ddb11fd38975e0ad1f7cd3b907b85cc11d36348

Download Submit
C:\Users\Admin\AppData\Local\Temp\Wrxuaatupdate-kmv.exe

Filesize
5.1MB

MD5
548b3c083dc843150679970cb38d6144

SHA1
a27b8bf86f4d79d4317d0096412ef2cca585e431

SHA256
57c94104863dae72ca86c7e0e177b8197b782ce729a1314a7791a4070748a3d5

SHA512
4860fc8085aa4663c0ec69648cfe482642403faa30aa0571fc218ebec42b18a40ee9e3e3dbe877d62c8215b82ddb11fd38975e0ad1f7cd3b907b85cc11d36348

Download Submit
C:\Users\Admin\AppData\Local\Temp\Wuoudwmrceeq.exe

Filesize
5.1MB

MD5
8815a29ce59d4e7ccea1f7a435099d66

SHA1
311d2e465af8ca22fde5346b29a01df8a9ed9309

SHA256
cb06dd10055a21e1dd9c499ad654da3607907af831a2f2fee6dde45027cbd3de

SHA512
26ccf1953ce5582b8f6b396fd53d78f6b52fff45472f0b3efc47d6c95e89355c167cc7eb39861c6233f8e4988271572387cd4299b26521dd675d82c35f646081

Download Submit
C:\Users\Admin\AppData\Local\Temp\Wuoudwmrceeq.exe

Filesize
5.1MB

MD5
8815a29ce59d4e7ccea1f7a435099d66

SHA1
311d2e465af8ca22fde5346b29a01df8a9ed9309

SHA256
cb06dd10055a21e1dd9c499ad654da3607907af831a2f2fee6dde45027cbd3de

SHA512
26ccf1953ce5582b8f6b396fd53d78f6b52fff45472f0b3efc47d6c95e89355c167cc7eb39861c6233f8e4988271572387cd4299b26521dd675d82c35f646081

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
304c2fb56113a020a64a8efe616decc6

SHA1
eb8f499cf9ea59ed9ac48c77595b3b169421cbb5

SHA256
44f8af7b652bb4cafe0b150db9d3ce388d8c4a9a4625d1604ae3f96281059b44

SHA512
a6c2c8056fe1428c5baad531bb0a7ee351e6884513ac2266f435068aafd6f2b61f6771afe68a84083a02f50c55553312e502f457f8cd8f97ecaa45e02244f6ab

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
304c2fb56113a020a64a8efe616decc6

SHA1
eb8f499cf9ea59ed9ac48c77595b3b169421cbb5

SHA256
44f8af7b652bb4cafe0b150db9d3ce388d8c4a9a4625d1604ae3f96281059b44

SHA512
a6c2c8056fe1428c5baad531bb0a7ee351e6884513ac2266f435068aafd6f2b61f6771afe68a84083a02f50c55553312e502f457f8cd8f97ecaa45e02244f6ab

Download Submit
\Users\Admin\AppData\Local\Temp\Wrxuaatupdate-kmv.exe

Filesize
5.1MB

MD5
548b3c083dc843150679970cb38d6144

SHA1
a27b8bf86f4d79d4317d0096412ef2cca585e431

SHA256
57c94104863dae72ca86c7e0e177b8197b782ce729a1314a7791a4070748a3d5

SHA512
4860fc8085aa4663c0ec69648cfe482642403faa30aa0571fc218ebec42b18a40ee9e3e3dbe877d62c8215b82ddb11fd38975e0ad1f7cd3b907b85cc11d36348

Download Submit
\Users\Admin\AppData\Local\Temp\Wuoudwmrceeq.exe

Filesize
5.1MB

MD5
8815a29ce59d4e7ccea1f7a435099d66

SHA1
311d2e465af8ca22fde5346b29a01df8a9ed9309

SHA256
cb06dd10055a21e1dd9c499ad654da3607907af831a2f2fee6dde45027cbd3de

SHA512
26ccf1953ce5582b8f6b396fd53d78f6b52fff45472f0b3efc47d6c95e89355c167cc7eb39861c6233f8e4988271572387cd4299b26521dd675d82c35f646081

Download Submit
memory/1028-72-0x00000000771E0000-0x0000000077389000-memory.dmp

Filesize
1.7MB

Download
memory/1028-71-0x00000000771E0000-0x0000000077389000-memory.dmp

Filesize
1.7MB

Download
memory/1028-56-0x000000001AEE0000-0x000000001AF72000-memory.dmp

Filesize
584KB

Download
memory/1028-55-0x0000000020F10000-0x000000002150A000-memory.dmp

Filesize
6.0MB

Download
memory/1028-54-0x000000013FC40000-0x0000000140B50000-memory.dmp

Filesize
15.1MB

Download
memory/1028-82-0x00000000771E0000-0x0000000077389000-memory.dmp

Filesize
1.7MB

Download
memory/1196-100-0x000000001BCA0000-0x000000001BD48000-memory.dmp

Filesize
672KB

Download
memory/1196-94-0x000000013F210000-0x000000013F720000-memory.dmp

Filesize
5.1MB

Download
memory/1244-83-0x00000000038F0000-0x000000000397E000-memory.dmp

Filesize
568KB

Download
memory/1244-84-0x000000001FE60000-0x000000001FF08000-memory.dmp

Filesize
672KB

Download
memory/1244-88-0x000000001FFAC000-0x000000001FFCB000-memory.dmp

Filesize
124KB

Download
memory/1244-95-0x000000001FFAC000-0x000000001FFCB000-memory.dmp

Filesize
124KB

Download
memory/1244-86-0x0000000003AE0000-0x0000000003B2C000-memory.dmp

Filesize
304KB

Download
memory/1244-85-0x00000000029E0000-0x0000000002A2E000-memory.dmp

Filesize
312KB

Download
memory/1532-109-0x000000001AB00000-0x000000001AB36000-memory.dmp

Filesize
216KB

Download
memory/1532-99-0x00000000771E0000-0x0000000077389000-memory.dmp

Filesize
1.7MB

Download
memory/1532-98-0x000000001AAE0000-0x000000001AB02000-memory.dmp

Filesize
136KB

Download
memory/1532-97-0x00000000024F0000-0x0000000002517000-memory.dmp

Filesize
156KB

Download
memory/1532-96-0x00000000771E0000-0x0000000077389000-memory.dmp

Filesize
1.7MB

Download
memory/1532-110-0x000000001AB30000-0x000000001AB38000-memory.dmp

Filesize
32KB

Download
memory/1532-70-0x000000013FD20000-0x0000000140230000-memory.dmp

Filesize
5.1MB

Download
memory/1532-111-0x000000001AF5C000-0x000000001AF7B000-memory.dmp

Filesize
124KB

Download
memory/1532-74-0x0000000002250000-0x00000000022E2000-memory.dmp

Filesize
584KB

Download
memory/1532-73-0x000000001F440000-0x000000001F9CC000-memory.dmp

Filesize
5.5MB

Download
memory/1696-61-0x000000001B770000-0x000000001BA6F000-memory.dmp

Filesize
3.0MB

Download
memory/1696-58-0x000007FEFBA61000-0x000007FEFBA63000-memory.dmp

Filesize
8KB

Download
memory/1696-62-0x0000000002764000-0x0000000002767000-memory.dmp

Filesize
12KB

Download
memory/1696-60-0x000007FEEABC0000-0x000007FEEB71D000-memory.dmp

Filesize
11.4MB

Download
memory/1696-59-0x000007FEEB720000-0x000007FEEC143000-memory.dmp

Filesize
10.1MB

Download
memory/1696-63-0x000000000276B000-0x000000000278A000-memory.dmp

Filesize
124KB

Download
memory/1696-64-0x0000000002764000-0x0000000002767000-memory.dmp

Filesize
12KB

Download
memory/1696-65-0x000000000276B000-0x000000000278A000-memory.dmp

Filesize
124KB

Download
memory/1884-87-0x0000000002574000-0x0000000002577000-memory.dmp

Filesize
12KB

Download
memory/1884-79-0x000007FEEA860000-0x000007FEEB3BD000-memory.dmp

Filesize
11.4MB

Download
memory/1884-81-0x000000000257B000-0x000000000259A000-memory.dmp

Filesize
124KB

Download
memory/1884-89-0x000000000257B000-0x000000000259A000-memory.dmp

Filesize
124KB

Download
memory/1884-78-0x000007FEEB3C0000-0x000007FEEBDE3000-memory.dmp

Filesize
10.1MB

Download
memory/1884-80-0x0000000002574000-0x0000000002577000-memory.dmp

Filesize
12KB

Download
memory/1928-106-0x0000000002844000-0x0000000002847000-memory.dmp

Filesize
12KB

Download
memory/1928-107-0x000000001B7E0000-0x000000001BADF000-memory.dmp

Filesize
3.0MB

Download
memory/1928-108-0x000000000284B000-0x000000000286A000-memory.dmp

Filesize
124KB

Download
memory/1928-105-0x000007FEE9EC0000-0x000007FEEAA1D000-memory.dmp

Filesize
11.4MB

Download
memory/1928-104-0x000007FEEAA20000-0x000007FEEB443000-memory.dmp

Filesize
10.1MB

Download
memory/1928-112-0x0000000002844000-0x0000000002847000-memory.dmp

Filesize
12KB

Download