purecrypter | 7200e2fdf4dc5ccbdf12e1cdd109d878f0e0909f3530769376c7f154385633d4

Analysis

max time kernel
30s
max time network
33s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
31-01-2023 08:08

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General

Target

12f82bd59a4b2273510a7a2c01b82f6b.exe
Size

7.2MB
MD5

12f82bd59a4b2273510a7a2c01b82f6b
SHA1

be9c13bf17fe304597729fc71f3eafff02e02a44
SHA256

7200e2fdf4dc5ccbdf12e1cdd109d878f0e0909f3530769376c7f154385633d4
SHA512

d8bf6d52b29d82805d750539122110c9614263d088665adbf7ba2d932245425593ecd7b8378183bbe31fbc4f198075edf0f292473f925286f6eaf6c7e3ff725f
SSDEEP

98304:os1DgtKt0M154pX1M0gF9OtfXJroEBV5FL0BsS4HJG+V5Os+vE9zK2SCmBh:gk54fmotPxoI++nOv8ICmBh

Score

10^/10

purecrypter discovery downloader evasion loader spyware stealer themida trojan

Malware Config

Signatures

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/1464-60-0x0000000005BD0000-0x0000000005E48000-memory.dmp	family_purecrypter

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

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	12f82bd59a4b2273510a7a2c01b82f6b.exe

Downloads MZ/PE file

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	12f82bd59a4b2273510a7a2c01b82f6b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	12f82bd59a4b2273510a7a2c01b82f6b.exe

Deletes itself 1 IoCs

pid	Process
1572	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
568	12f82bd59a4b2273510a7a2c01b82f6b.exe
568	12f82bd59a4b2273510a7a2c01b82f6b.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Themida packer 4 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/1464-58-0x00000000011D0000-0x0000000001FDE000-memory.dmp	themida
behavioral1/memory/1464-59-0x00000000011D0000-0x0000000001FDE000-memory.dmp	themida
behavioral1/memory/1464-76-0x00000000011D0000-0x0000000001FDE000-memory.dmp	themida
behavioral1/memory/568-101-0x00000000011D0000-0x0000000001FDE000-memory.dmp	themida

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	12f82bd59a4b2273510a7a2c01b82f6b.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1464	12f82bd59a4b2273510a7a2c01b82f6b.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1464 set thread context of 568	1464	12f82bd59a4b2273510a7a2c01b82f6b.exe	28

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	12f82bd59a4b2273510a7a2c01b82f6b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	12f82bd59a4b2273510a7a2c01b82f6b.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
596	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1464	12f82bd59a4b2273510a7a2c01b82f6b.exe
568	12f82bd59a4b2273510a7a2c01b82f6b.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1464	12f82bd59a4b2273510a7a2c01b82f6b.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1464 wrote to memory of 568	1464	12f82bd59a4b2273510a7a2c01b82f6b.exe	28
PID 1464 wrote to memory of 568	1464	12f82bd59a4b2273510a7a2c01b82f6b.exe	28
PID 1464 wrote to memory of 568	1464	12f82bd59a4b2273510a7a2c01b82f6b.exe	28
PID 1464 wrote to memory of 568	1464	12f82bd59a4b2273510a7a2c01b82f6b.exe	28
PID 1464 wrote to memory of 568	1464	12f82bd59a4b2273510a7a2c01b82f6b.exe	28
PID 1464 wrote to memory of 568	1464	12f82bd59a4b2273510a7a2c01b82f6b.exe	28
PID 1464 wrote to memory of 568	1464	12f82bd59a4b2273510a7a2c01b82f6b.exe	28
PID 1464 wrote to memory of 568	1464	12f82bd59a4b2273510a7a2c01b82f6b.exe	28
PID 1464 wrote to memory of 568	1464	12f82bd59a4b2273510a7a2c01b82f6b.exe	28
PID 1464 wrote to memory of 568	1464	12f82bd59a4b2273510a7a2c01b82f6b.exe	28
PID 1464 wrote to memory of 568	1464	12f82bd59a4b2273510a7a2c01b82f6b.exe	28
PID 1464 wrote to memory of 568	1464	12f82bd59a4b2273510a7a2c01b82f6b.exe	28
PID 568 wrote to memory of 1572	568	12f82bd59a4b2273510a7a2c01b82f6b.exe	31
PID 568 wrote to memory of 1572	568	12f82bd59a4b2273510a7a2c01b82f6b.exe	31
PID 568 wrote to memory of 1572	568	12f82bd59a4b2273510a7a2c01b82f6b.exe	31
PID 568 wrote to memory of 1572	568	12f82bd59a4b2273510a7a2c01b82f6b.exe	31
PID 1572 wrote to memory of 596	1572	cmd.exe	33
PID 1572 wrote to memory of 596	1572	cmd.exe	33
PID 1572 wrote to memory of 596	1572	cmd.exe	33
PID 1572 wrote to memory of 596	1572	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\12f82bd59a4b2273510a7a2c01b82f6b.exe
"C:\Users\Admin\AppData\Local\Temp\12f82bd59a4b2273510a7a2c01b82f6b.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1464
- C:\Users\Admin\AppData\Local\Temp\12f82bd59a4b2273510a7a2c01b82f6b.exe
  C:\Users\Admin\AppData\Local\Temp\12f82bd59a4b2273510a7a2c01b82f6b.exe
  2⤵
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:568
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\12f82bd59a4b2273510a7a2c01b82f6b.exe" & del "C:\ProgramData\*.dll"" & exit
    3⤵
    - Deletes itself
    - Suspicious use of WriteProcessMemory
    PID:1572
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 5
      4⤵
      Delays execution with timeout.exe
      PID:596

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
\ProgramData\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
memory/568-65-0x0000000000400000-0x0000000000628000-memory.dmp

Filesize
2.2MB

Download
memory/568-101-0x00000000011D0000-0x0000000001FDE000-memory.dmp

Filesize
14.1MB

Download
memory/568-102-0x0000000000400000-0x0000000000628000-memory.dmp

Filesize
2.2MB

Download
memory/568-79-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/568-62-0x0000000000400000-0x0000000000628000-memory.dmp

Filesize
2.2MB

Download
memory/568-63-0x0000000000400000-0x0000000000628000-memory.dmp

Filesize
2.2MB

Download
memory/568-75-0x00000000011D0000-0x0000000001FDE000-memory.dmp

Filesize
14.1MB

Download
memory/568-67-0x0000000000400000-0x0000000000628000-memory.dmp

Filesize
2.2MB

Download
memory/568-77-0x0000000000400000-0x0000000000628000-memory.dmp

Filesize
2.2MB

Download
memory/568-69-0x0000000000400000-0x0000000000628000-memory.dmp

Filesize
2.2MB

Download
memory/568-73-0x0000000000400000-0x0000000000628000-memory.dmp

Filesize
2.2MB

Download
memory/1464-61-0x0000000000F70000-0x0000000000FB8000-memory.dmp

Filesize
288KB

Download
memory/1464-76-0x00000000011D0000-0x0000000001FDE000-memory.dmp

Filesize
14.1MB

Download
memory/1464-70-0x0000000005E50000-0x0000000006C5E000-memory.dmp

Filesize
14.1MB

Download
memory/1464-78-0x0000000077BB0000-0x0000000077D30000-memory.dmp

Filesize
1.5MB

Download
memory/1464-54-0x0000000076581000-0x0000000076583000-memory.dmp

Filesize
8KB

Download
memory/1464-60-0x0000000005BD0000-0x0000000005E48000-memory.dmp

Filesize
2.5MB

Download
memory/1464-59-0x00000000011D0000-0x0000000001FDE000-memory.dmp

Filesize
14.1MB

Download
memory/1464-58-0x00000000011D0000-0x0000000001FDE000-memory.dmp

Filesize
14.1MB

Download
memory/1464-57-0x0000000077BB0000-0x0000000077D30000-memory.dmp

Filesize
1.5MB

Download
memory/1464-55-0x00000000011D0000-0x0000000001FDE000-memory.dmp

Filesize
14.1MB

Download