purecrypter | 657902569e11c460f3fc897b49549abb419f95dff5fc64f94e8949e332085215

General

Target

setupov16.exe
Size

311.0MB
MD5

325c0cd17d60199c68156aec055f234e
SHA1

841bfe0376b4cd90cc38a3e1d4b982c5296cf4e2
SHA256

657902569e11c460f3fc897b49549abb419f95dff5fc64f94e8949e332085215
SHA512

23f4930e414d2ccb1b32dc82b86e8c421b1aac9d6894c45606b0b708ab6140dd10ab0180c3959d6ddde76d605cdec00cbe0f94f741c78c769eea46d23a8866e7
SSDEEP

96:LmJQaxddLegL2RZBz+4O0OFKqWZkr8lGDwaYz2N924vBM4zNt:LmJJdLD2TNp3q1YQDDYzi9faa

Score

10^/10

purecrypter downloader loader

Malware Config

Extracted

Family

purecrypter

C2

http://comicmaster.org.uk/img/css/design/fabric/bo/Kvxut.dat

Signatures

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

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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	setupov16.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4708 set thread context of 4956	4708	setupov16.exe	96

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 8 IoCs

pid	Process
3308	powershell.exe
3308	powershell.exe
4708	setupov16.exe
4708	setupov16.exe
4708	setupov16.exe
4708	setupov16.exe
2828	powershell.exe
2828	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4708	setupov16.exe
Token: SeDebugPrivilege	3308	powershell.exe
Token: SeDebugPrivilege	2828	powershell.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4708 wrote to memory of 3308	4708	setupov16.exe	83
PID 4708 wrote to memory of 3308	4708	setupov16.exe	83
PID 4708 wrote to memory of 3308	4708	setupov16.exe	83
PID 4708 wrote to memory of 4192	4708	setupov16.exe	92
PID 4708 wrote to memory of 4192	4708	setupov16.exe	92
PID 4708 wrote to memory of 4192	4708	setupov16.exe	92
PID 4708 wrote to memory of 3768	4708	setupov16.exe	94
PID 4708 wrote to memory of 3768	4708	setupov16.exe	94
PID 4708 wrote to memory of 3768	4708	setupov16.exe	94
PID 4708 wrote to memory of 4148	4708	setupov16.exe	95
PID 4708 wrote to memory of 4148	4708	setupov16.exe	95
PID 4708 wrote to memory of 4148	4708	setupov16.exe	95
PID 4708 wrote to memory of 4956	4708	setupov16.exe	96
PID 4708 wrote to memory of 4956	4708	setupov16.exe	96
PID 4708 wrote to memory of 4956	4708	setupov16.exe	96
PID 4708 wrote to memory of 4956	4708	setupov16.exe	96
PID 4708 wrote to memory of 4956	4708	setupov16.exe	96
PID 4708 wrote to memory of 4956	4708	setupov16.exe	96
PID 4708 wrote to memory of 4956	4708	setupov16.exe	96
PID 4708 wrote to memory of 4956	4708	setupov16.exe	96
PID 4192 wrote to memory of 2828	4192	cmd.exe	97
PID 4192 wrote to memory of 2828	4192	cmd.exe	97
PID 4192 wrote to memory of 2828	4192	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\setupov16.exe
"C:\Users\Admin\AppData\Local\Temp\setupov16.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4708
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMwA1AA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3308
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c powershell -ENC cwBlAHQALQBtAHAAcAByAGUAZgBlAHIAZQBuAGMAZQAgAC0AZQB4AGMAbAB1AHMAaQBvAG4AcABhAHQAaAAgAEMAOgBcAA==
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4192
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -ENC cwBlAHQALQBtAHAAcAByAGUAZgBlAHIAZQBuAGMAZQAgAC0AZQB4AGMAbAB1AHMAaQBvAG4AcABhAHQAaAAgAEMAOgBcAA==
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2828
- C:\Users\Admin\AppData\Local\Temp\setupov16.exe
  C:\Users\Admin\AppData\Local\Temp\setupov16.exe
  2⤵
  PID:3768
- C:\Users\Admin\AppData\Local\Temp\setupov16.exe
  C:\Users\Admin\AppData\Local\Temp\setupov16.exe
  2⤵
  PID:4148
- C:\Users\Admin\AppData\Local\Temp\setupov16.exe
  C:\Users\Admin\AppData\Local\Temp\setupov16.exe
  2⤵
  PID:4956

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
1KB

MD5
6195a91754effb4df74dbc72cdf4f7a6

SHA1
aba262f5726c6d77659fe0d3195e36a85046b427

SHA256
3254495a5513b37a2686a876d0040275414699e7ce760e7b5ee05e41a54b96f5

SHA512
ed723d15de267390dc93263538428e2c881be3494c996a810616b470d6df7d5acfcc8725687d5c50319ebef45caef44f769bfc32e0dc3abd249dacff4a12cc89

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache

Filesize
53KB

MD5
06ad34f9739c5159b4d92d702545bd49

SHA1
9152a0d4f153f3f40f7e606be75f81b582ee0c17

SHA256
474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba

SHA512
c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
16KB

MD5
3e4824bed9e917b3873f44a80f37ebf9

SHA1
53abd05c2d2c49d9bd5c5715f6dedf8c26d1c545

SHA256
cc812b52f70349a791f407fb7856d242254f1f87d31839beed37a20d0753aa91

SHA512
69eb2809812341ba928b91fc193181c6ad693d753ac7403bbf0254c29829d5f54c7273f70b654a514b8a7b97953e725225e3aa241b20dde991c536fd2abc87bf

Download Submit
memory/2828-161-0x0000000006F60000-0x0000000006F68000-memory.dmp

Filesize
32KB

Download
memory/2828-160-0x0000000006F80000-0x0000000006F9A000-memory.dmp

Filesize
104KB

Download
memory/2828-159-0x00000000058D0000-0x00000000058DE000-memory.dmp

Filesize
56KB

Download
memory/2828-158-0x0000000007020000-0x00000000070B6000-memory.dmp

Filesize
600KB

Download
memory/2828-157-0x0000000006DD0000-0x0000000006DDA000-memory.dmp

Filesize
40KB

Download
memory/2828-156-0x0000000006010000-0x000000000602E000-memory.dmp

Filesize
120KB

Download
memory/2828-155-0x000000006FC60000-0x000000006FCAC000-memory.dmp

Filesize
304KB

Download
memory/2828-154-0x0000000006A00000-0x0000000006A32000-memory.dmp

Filesize
200KB

Download
memory/3308-139-0x00000000062A0000-0x00000000062BE000-memory.dmp

Filesize
120KB

Download
memory/3308-136-0x00000000053A0000-0x00000000059C8000-memory.dmp

Filesize
6.2MB

Download
memory/3308-135-0x0000000002D10000-0x0000000002D46000-memory.dmp

Filesize
216KB

Download
memory/3308-137-0x0000000005BE0000-0x0000000005C46000-memory.dmp

Filesize
408KB

Download
memory/3308-138-0x0000000005D50000-0x0000000005DB6000-memory.dmp

Filesize
408KB

Download
memory/3308-140-0x0000000007AC0000-0x000000000813A000-memory.dmp

Filesize
6.5MB

Download
memory/3308-141-0x00000000067A0000-0x00000000067BA000-memory.dmp

Filesize
104KB

Download
memory/4708-132-0x0000000000900000-0x0000000000908000-memory.dmp

Filesize
32KB

Download
memory/4708-133-0x00000000066C0000-0x00000000066E2000-memory.dmp

Filesize
136KB

Download
memory/4956-152-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/4956-149-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/4956-146-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download

Analysis

Sharing