purecrypter | a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d

General

Target

a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe
Size

81KB
MD5

d0a9b69bad966520f71412a8ce2035b0
SHA1

ba5347ee2a896b27d211520a3666a682aa9f8e28
SHA256

a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d
SHA512

489000c1a40703380e285912e42916cd4ae2568f5a7371013f9c8b3bb3465440330ddef43731b6b1a8c653661162a805cf745bc8fd66ef386a8d039203920e01
SSDEEP

1536:UxYAEa9Bj08oGaa82Tq70ddJwgKi3izHxGZnLWzSH3OQMjQ4Nzq2B:Ux39bo4EifJKEmH8ZnLuOqHNzR

Score

10^/10

purecrypter snakekeylogger collection downloader keylogger loader stealer

Malware Config

Extracted

Family

purecrypter

C2

http://192.3.26.135/uo/Wqnssgirj.dat

Extracted

Family

snakekeylogger

Credentials

Protocol: smtp
Host:
us2.smtp.mailhostbox.com
Port:
587
Username:
[email protected]
Password:
doDHyw%0
Email To:
[email protected]

Signatures

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
stealer keylogger snakekeylogger

Snake Keylogger payload 1 IoCs

resource	yara_rule
behavioral1/memory/4596-158-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3346939869-2835594282-3775165920-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-3346939869-2835594282-3775165920-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-3346939869-2835594282-3775165920-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.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
4	checkip.dyndns.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3236 set thread context of 4596	3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe	69

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 6 IoCs

pid	Process
3904	powershell.exe
3904	powershell.exe
3904	powershell.exe
3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe
3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe
4596	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe
Token: SeDebugPrivilege	3904	powershell.exe
Token: SeDebugPrivilege	4596	MSBuild.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3236 wrote to memory of 3904	3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe	66
PID 3236 wrote to memory of 3904	3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe	66
PID 3236 wrote to memory of 3904	3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe	66
PID 3236 wrote to memory of 4588	3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe	68
PID 3236 wrote to memory of 4588	3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe	68
PID 3236 wrote to memory of 4588	3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe	68
PID 3236 wrote to memory of 4596	3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe	69
PID 3236 wrote to memory of 4596	3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe	69
PID 3236 wrote to memory of 4596	3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe	69
PID 3236 wrote to memory of 4596	3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe	69
PID 3236 wrote to memory of 4596	3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe	69
PID 3236 wrote to memory of 4596	3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe	69
PID 3236 wrote to memory of 4596	3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe	69
PID 3236 wrote to memory of 4596	3236	a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe	69

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3346939869-2835594282-3775165920-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3346939869-2835594282-3775165920-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe
"C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3236
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3904
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  2⤵
  PID:4588
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:4596

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xx4xtigo.cyt.ps1

Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

Download Submit
memory/3236-117-0x0000000000530000-0x000000000054A000-memory.dmp

Filesize
104KB

Download
memory/3236-118-0x0000000005300000-0x00000000057FE000-memory.dmp

Filesize
5.0MB

Download
memory/3236-119-0x0000000004EE0000-0x0000000004F72000-memory.dmp

Filesize
584KB

Download
memory/3236-120-0x0000000005060000-0x0000000005070000-memory.dmp

Filesize
64KB

Download
memory/3236-121-0x0000000004EA0000-0x0000000004EAA000-memory.dmp

Filesize
40KB

Download
memory/3236-122-0x00000000066F0000-0x000000000684A000-memory.dmp

Filesize
1.4MB

Download
memory/3236-123-0x0000000007AD0000-0x0000000007B62000-memory.dmp

Filesize
584KB

Download
memory/3236-124-0x0000000007B90000-0x0000000007BB2000-memory.dmp

Filesize
136KB

Download
memory/3236-125-0x0000000007BC0000-0x0000000007F10000-memory.dmp

Filesize
3.3MB

Download
memory/3904-131-0x0000000007490000-0x00000000074F6000-memory.dmp

Filesize
408KB

Download
memory/3904-128-0x00000000066E0000-0x0000000006716000-memory.dmp

Filesize
216KB

Download
memory/3904-129-0x0000000004630000-0x0000000004640000-memory.dmp

Filesize
64KB

Download
memory/3904-132-0x00000000076E0000-0x0000000007746000-memory.dmp

Filesize
408KB

Download
memory/3904-133-0x00000000077D0000-0x00000000077EC000-memory.dmp

Filesize
112KB

Download
memory/3904-134-0x0000000007BB0000-0x0000000007BFB000-memory.dmp

Filesize
300KB

Download
memory/3904-135-0x0000000007F20000-0x0000000007F96000-memory.dmp

Filesize
472KB

Download
memory/3904-130-0x0000000006D50000-0x0000000007378000-memory.dmp

Filesize
6.2MB

Download
memory/3904-150-0x00000000096D0000-0x0000000009D48000-memory.dmp

Filesize
6.5MB

Download
memory/3904-151-0x0000000008C70000-0x0000000008C8A000-memory.dmp

Filesize
104KB

Download
memory/3904-154-0x0000000004630000-0x0000000004640000-memory.dmp

Filesize
64KB

Download
memory/4596-158-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4596-160-0x0000000005130000-0x00000000051CC000-memory.dmp

Filesize
624KB

Download
memory/4596-161-0x0000000005500000-0x0000000005510000-memory.dmp

Filesize
64KB

Download
memory/4596-162-0x0000000006120000-0x00000000062E2000-memory.dmp

Filesize
1.8MB

Download
memory/4596-163-0x0000000005500000-0x0000000005510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads