purecrypter | 84e348e49442b996738cb0d3d4fcd275e3db781fe805045e139736d9eeeca695

General

Target

Zasneipp.exe
Size

7KB
MD5

c035e1bc5f37c474441db456d903eea0
SHA1

bc6992a6e31b6d67b6732c142ec47bebde49fee1
SHA256

84e348e49442b996738cb0d3d4fcd275e3db781fe805045e139736d9eeeca695
SHA512

845f22b8b4f6a75d96f63e5546c7f719de57d54b4f15a9789f4156e1156fb6fbe54d61aded8da54a1ef0e8e2d9e55192f18ee032d43d1f2c6c5fd675a3150373
SSDEEP

96:iUBTdcgDszgY1KsXrXhRQYYB3Tt4BtEkdexegbFnU:iUBhUdRQYYFGzAkZ

Score

10^/10

purecrypter snakekeylogger collection downloader keylogger loader stealer

Malware Config

Extracted

Family

snakekeylogger

C2

https://api.telegram.org/bot5824924248:AAF4WKjJ8FxpNsC2HwCM114EP_g8rFkC4wQ/sendMessage?chat_id=2054148913

Signatures

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/1884-56-0x00000000063D0000-0x000000000662A000-memory.dmp	family_purecrypter

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 6 IoCs

resource	yara_rule
behavioral1/memory/1020-66-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1020-68-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1020-70-0x00000000004206FE-mapping.dmp	family_snakekeylogger
behavioral1/memory/1020-69-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1020-72-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1020-74-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\16.0\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
6	checkip.dyndns.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1884 set thread context of 1020	1884	Zasneipp.exe	29

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

System Information Discovery
T1082

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474	Zasneipp.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474\Blob = 040000000100000010000000acb694a59c17e0d791529bb19706a6e40f0000000100000014000000ce0e658aa3e847e467a147b3049191093d055e6f0b0000000100000034000000420061006c00740069006d006f007200650020004300790062006500720054007200750073007400200052006f006f007400000053000000010000002400000030223020060a2b06010401b13e01640130123010060a2b0601040182373c0101030200c0140000000100000014000000e59d5930824758ccacfa085436867b3ab5044df01d0000000100000010000000918ad43a9475f78bb5243de886d8103c09000000010000000c000000300a06082b06010505070301030000000100000014000000d4de20d05e66fc53fe1a50882c78db2852cae47419000000010000001000000068cb42b035ea773e52ef50ecf50ec52920000000010000007b030000308203773082025fa0030201020204020000b9300d06092a864886f70d0101050500305a310b300906035504061302494531123010060355040a130942616c74696d6f726531133011060355040b130a43796265725472757374312230200603550403131942616c74696d6f7265204379626572547275737420526f6f74301e170d3030303531323138343630305a170d3235303531323233353930305a305a310b300906035504061302494531123010060355040a130942616c74696d6f726531133011060355040b130a43796265725472757374312230200603550403131942616c74696d6f7265204379626572547275737420526f6f7430820122300d06092a864886f70d01010105000382010f003082010a0282010100a304bb22ab983d57e826729ab579d429e2e1e89580b1b0e35b8e2b299a64dfa15dedb009056ddb282ece62a262feb488da12eb38eb219dc0412b01527b8877d31c8fc7bab988b56a09e773e81140a7d1ccca628d2de58f0ba650d2a850c328eaf5ab25878a9a961ca967b83f0cd5f7f952132fc21bd57070f08fc012ca06cb9ae1d9ca337a77d6f8ecb9f16844424813d2c0c2a4ae5e60feb6a605fcb4dd075902d459189863f5a563e0900c7d5db2067af385eaebd403ae5e843e5fff15ed69bcf939367275cf77524df3c9902cb93de5c923533f1f2498215c079929bdc63aece76e863a6b97746333bd681831f0788d76bffc9e8e5d2a86a74d90dc271a390203010001a3453043301d0603551d0e04160414e59d5930824758ccacfa085436867b3ab5044df030120603551d130101ff040830060101ff020103300e0603551d0f0101ff040403020106300d06092a864886f70d01010505000382010100850c5d8ee46f51684205a0ddbb4f27258403bdf764fd2dd730e3a41017ebda2929b6793f76f6191323b8100af958a4d46170bd04616a128a17d50abdc5bc307cd6e90c258d86404feccca37e38c637114feddd68318e4cd2b30174eebe755e07481a7f70ff165c84c07985b805fd7fbe6511a30fc002b4f852373904d5a9317a18bfa02af41299f7a34582e33c5ef59d9eb5c89e7c2ec8a49e4e08144b6dfd706d6b1a63bd64e61fb7cef0f29f2ebb1bb7f250887392c2e2e3168d9a3202ab8e18dde91011ee7e35ab90af3e30947ad0333da7650ff5fc8e9e62cf47442c015dbb1db532d247d2382ed0fe81dc326a1eb5ee3cd5fce7811d19c32442ea6339a9	Zasneipp.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
960	powershell.exe
1020	MSBuild.exe
1020	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1884	Zasneipp.exe
Token: SeDebugPrivilege	960	powershell.exe
Token: SeDebugPrivilege	1020	MSBuild.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1884 wrote to memory of 960	1884	Zasneipp.exe	27
PID 1884 wrote to memory of 960	1884	Zasneipp.exe	27
PID 1884 wrote to memory of 960	1884	Zasneipp.exe	27
PID 1884 wrote to memory of 960	1884	Zasneipp.exe	27
PID 1884 wrote to memory of 1020	1884	Zasneipp.exe	29
PID 1884 wrote to memory of 1020	1884	Zasneipp.exe	29
PID 1884 wrote to memory of 1020	1884	Zasneipp.exe	29
PID 1884 wrote to memory of 1020	1884	Zasneipp.exe	29
PID 1884 wrote to memory of 1020	1884	Zasneipp.exe	29
PID 1884 wrote to memory of 1020	1884	Zasneipp.exe	29
PID 1884 wrote to memory of 1020	1884	Zasneipp.exe	29
PID 1884 wrote to memory of 1020	1884	Zasneipp.exe	29
PID 1884 wrote to memory of 1020	1884	Zasneipp.exe	29

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\Zasneipp.exe
"C:\Users\Admin\AppData\Local\Temp\Zasneipp.exe"
1⤵
- Suspicious use of SetThreadContext
- Modifies system certificate store
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1884
- 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:960
- 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:1020

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Install Root Certificate

Modify Registry

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

memory/960-59-0x000000006F250000-0x000000006F7FB000-memory.dmp

Filesize
5.7MB

Download
memory/960-61-0x000000006F250000-0x000000006F7FB000-memory.dmp

Filesize
5.7MB

Download
memory/960-60-0x000000006F250000-0x000000006F7FB000-memory.dmp

Filesize
5.7MB

Download
memory/1020-63-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1020-64-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1020-66-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1020-68-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1020-69-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1020-72-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1020-74-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1884-56-0x00000000063D0000-0x000000000662A000-memory.dmp

Filesize
2.4MB

Download
memory/1884-55-0x0000000075201000-0x0000000075203000-memory.dmp

Filesize
8KB

Download
memory/1884-62-0x0000000004EA0000-0x0000000004EEA000-memory.dmp

Filesize
296KB

Download
memory/1884-54-0x00000000000F0000-0x00000000000F8000-memory.dmp

Filesize
32KB

Download

Analysis

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