purecrypter | 9fbd44c68c8181d842e2553efc72b2f56324d638f56e2581b2db2ce53421d70f

General

Target

b67649a9a69b4891e75746f8ed5ffbec.exe
Size

1.5MB
MD5

b67649a9a69b4891e75746f8ed5ffbec
SHA1

4d59dcf71f149fbd482e045bd58742d8589b7d4b
SHA256

9fbd44c68c8181d842e2553efc72b2f56324d638f56e2581b2db2ce53421d70f
SHA512

6edfb13376787e5a2f6fcfc5126421c60080c2504b48cad2b37cde73e441a66462220b6e2ca56e1223c864df0c2011c6244e5139b70744141fc6b59a60771e70
SSDEEP

24576:DP/kDXWkQpq97UrOPdDOBeWICivr9kDXWkQpq97UrOPdDOBeWICivp:DUm5pYI6PdDAeTvr2m5pYI6PdDAeTvp

Score

10^/10

purecrypter downloader loader

Malware Config

Extracted

Family

purecrypter

C2

http://rssh.li/panel/uploads/Vvfilmvppec.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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	b67649a9a69b4891e75746f8ed5ffbec.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
105	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4996 set thread context of 796	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	95

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

System Information Discovery
T1082

Gathers network information 2 TTPs 2 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command-Line Interface

T1059

pid	Process
952	ipconfig.exe
2460	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3304	powershell.exe
3304	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4996	b67649a9a69b4891e75746f8ed5ffbec.exe
Token: SeDebugPrivilege	3304	powershell.exe
Token: SeDebugPrivilege	796	b67649a9a69b4891e75746f8ed5ffbec.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4996 wrote to memory of 4320	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	80
PID 4996 wrote to memory of 4320	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	80
PID 4996 wrote to memory of 4320	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	80
PID 4320 wrote to memory of 952	4320	cmd.exe	82
PID 4320 wrote to memory of 952	4320	cmd.exe	82
PID 4320 wrote to memory of 952	4320	cmd.exe	82
PID 4996 wrote to memory of 3304	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	83
PID 4996 wrote to memory of 3304	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	83
PID 4996 wrote to memory of 3304	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	83
PID 4996 wrote to memory of 4596	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	92
PID 4996 wrote to memory of 4596	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	92
PID 4996 wrote to memory of 4596	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	92
PID 4596 wrote to memory of 2460	4596	cmd.exe	94
PID 4596 wrote to memory of 2460	4596	cmd.exe	94
PID 4596 wrote to memory of 2460	4596	cmd.exe	94
PID 4996 wrote to memory of 796	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	95
PID 4996 wrote to memory of 796	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	95
PID 4996 wrote to memory of 796	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	95
PID 4996 wrote to memory of 796	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	95
PID 4996 wrote to memory of 796	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	95
PID 4996 wrote to memory of 796	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	95
PID 4996 wrote to memory of 796	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	95
PID 4996 wrote to memory of 796	4996	b67649a9a69b4891e75746f8ed5ffbec.exe	95

C:\Users\Admin\AppData\Local\Temp\b67649a9a69b4891e75746f8ed5ffbec.exe
"C:\Users\Admin\AppData\Local\Temp\b67649a9a69b4891e75746f8ed5ffbec.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4996
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c ipconfig/release
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4320
- - C:\Windows\SysWOW64\ipconfig.exe
    ipconfig /release
    3⤵
    - Gathers network information
    PID:952
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMQAyADAA
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3304
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c ipconfig/renew
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4596
- - C:\Windows\SysWOW64\ipconfig.exe
    ipconfig /renew
    3⤵
    - Gathers network information
    PID:2460
- C:\Users\Admin\AppData\Local\Temp\b67649a9a69b4891e75746f8ed5ffbec.exe
  C:\Users\Admin\AppData\Local\Temp\b67649a9a69b4891e75746f8ed5ffbec.exe
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:796

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

1

T1059

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\b67649a9a69b4891e75746f8ed5ffbec.exe.log

Filesize
1KB

MD5
3a9188331a78f1dbce606db64b841fcb

SHA1
8e2c99b7c477d06591a856a4ea3e1e214719eee8

SHA256
db4137e258a0f6159fda559a5f6dd2704be0582c3f0586f65040c7ad1eb68451

SHA512
d1a994610a045d89d5d306866c24ae56bf16555414b8f63f632552568e67b5586f26d5a17a1f0a55ada376730298e6d856e9161828d4eae9decfa4e015e0e90a

Download Submit
memory/796-149-0x0000000005800000-0x000000000589C000-memory.dmp

Filesize
624KB

Download
memory/796-147-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/3304-140-0x0000000005E00000-0x0000000005E66000-memory.dmp

Filesize
408KB

Download
memory/3304-139-0x0000000005D20000-0x0000000005D86000-memory.dmp

Filesize
408KB

Download
memory/3304-141-0x0000000006450000-0x000000000646E000-memory.dmp

Filesize
120KB

Download
memory/3304-142-0x0000000007C40000-0x00000000082BA000-memory.dmp

Filesize
6.5MB

Download
memory/3304-143-0x0000000007500000-0x000000000751A000-memory.dmp

Filesize
104KB

Download
memory/3304-138-0x0000000005680000-0x0000000005CA8000-memory.dmp

Filesize
6.2MB

Download
memory/3304-137-0x0000000004EB0000-0x0000000004EE6000-memory.dmp

Filesize
216KB

Download
memory/4996-132-0x0000000000BB0000-0x0000000000BD0000-memory.dmp

Filesize
128KB

Download
memory/4996-133-0x0000000006980000-0x00000000069A2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads