purecrypter | e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0

Analysis

max time kernel
82s
max time network
130s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
23-02-2023 12:07

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General

Target

e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe
Size

25KB
MD5

30b5426ee9183f43fba9a8a6b6b32b97
SHA1

d0b8cde6d8c38e294ce6275b0f935677b07d2202
SHA256

e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0
SHA512

adef79c0748b1e8c274f93879c1c068e0d54b88de94fbb01d4d51bd222a6493f8d2cc68f53adab5407bd59249dfa2fdbc8f511bbec3613772591b0ea4d79afaf
SSDEEP

96:jFQgbeIBVLyrgoJ/sTfNILBevmXR5MMRWnwLoLEk8LfjNiRB4e3T3ew5tvEzNt:jFhyIaUo/sTfNILwEfdRTLat8LLGTvu

Score

10^/10

purecrypter smokeloader backdoor collection downloader loader trojan

Malware Config

Extracted

Family

purecrypter

http://argentum.com.br/well-known/acme-challenge/k/h/d/g/Pjogwzrhh.bmp

http://argentum.com.br/well-known/acme-challenge/k/h/d/g/Xzcrd.png

Signatures

Detects Smokeloader packer 3 IoCs

resource	yara_rule
behavioral1/memory/828-162-0x0000000000400000-0x0000000000409000-memory.dmp	family_smokeloader
behavioral1/memory/828-164-0x0000000000400000-0x0000000000409000-memory.dmp	family_smokeloader
behavioral1/memory/828-166-0x0000000000400000-0x0000000000409000-memory.dmp	family_smokeloader

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
SmokeLoader
Modular backdoor trojan in use since 2014.
trojan backdoor smokeloader

Checks computer location settings 2 TTPs 2 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-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	BECC.exe

Executes dropped EXE 1 IoCs

pid	Process
3908	BECC.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	explorer.exe
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	explorer.exe
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	explorer.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3192 set thread context of 828	3192	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe	84

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

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4568	powershell.exe
4568	powershell.exe
828	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe
828	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found

Suspicious behavior: MapViewOfSection 13 IoCs

pid	Process
828	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found
3112	Process not Found

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3192	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe
Token: SeDebugPrivilege	4568	powershell.exe
Token: SeDebugPrivilege	3908	BECC.exe
Token: SeDebugPrivilege	2272	powershell.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 3192 wrote to memory of 4568	3192	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe	82
PID 3192 wrote to memory of 4568	3192	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe	82
PID 3192 wrote to memory of 4568	3192	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe	82
PID 3192 wrote to memory of 828	3192	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe	84
PID 3192 wrote to memory of 828	3192	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe	84
PID 3192 wrote to memory of 828	3192	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe	84
PID 3192 wrote to memory of 828	3192	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe	84
PID 3192 wrote to memory of 828	3192	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe	84
PID 3192 wrote to memory of 828	3192	e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe	84
PID 3112 wrote to memory of 3908	3112	Process not Found	88
PID 3112 wrote to memory of 3908	3112	Process not Found	88
PID 3112 wrote to memory of 3908	3112	Process not Found	88
PID 3112 wrote to memory of 1284	3112	Process not Found	89
PID 3112 wrote to memory of 1284	3112	Process not Found	89
PID 3112 wrote to memory of 1284	3112	Process not Found	89
PID 3112 wrote to memory of 1284	3112	Process not Found	89
PID 3112 wrote to memory of 492	3112	Process not Found	90
PID 3112 wrote to memory of 492	3112	Process not Found	90
PID 3112 wrote to memory of 492	3112	Process not Found	90
PID 3112 wrote to memory of 916	3112	Process not Found	91
PID 3112 wrote to memory of 916	3112	Process not Found	91
PID 3112 wrote to memory of 916	3112	Process not Found	91
PID 3112 wrote to memory of 916	3112	Process not Found	91
PID 3908 wrote to memory of 2272	3908	BECC.exe	92
PID 3908 wrote to memory of 2272	3908	BECC.exe	92
PID 3908 wrote to memory of 2272	3908	BECC.exe	92
PID 3112 wrote to memory of 1400	3112	Process not Found	94
PID 3112 wrote to memory of 1400	3112	Process not Found	94
PID 3112 wrote to memory of 1400	3112	Process not Found	94
PID 3112 wrote to memory of 1184	3112	Process not Found	95
PID 3112 wrote to memory of 1184	3112	Process not Found	95
PID 3112 wrote to memory of 1184	3112	Process not Found	95
PID 3112 wrote to memory of 1184	3112	Process not Found	95
PID 3112 wrote to memory of 1812	3112	Process not Found	96
PID 3112 wrote to memory of 1812	3112	Process not Found	96
PID 3112 wrote to memory of 1812	3112	Process not Found	96

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	explorer.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	explorer.exe

C:\Users\Admin\AppData\Local\Temp\e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe
"C:\Users\Admin\AppData\Local\Temp\e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3192
- 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:4568
- C:\Users\Admin\AppData\Local\Temp\e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe
  C:\Users\Admin\AppData\Local\Temp\e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0.exe
  2⤵
  - Checks SCSI registry key(s)
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  PID:828

C:\Users\Admin\AppData\Local\Temp\BECC.exe
C:\Users\Admin\AppData\Local\Temp\BECC.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3908
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2272

C:\Windows\SysWOW64\explorer.exe
C:\Windows\SysWOW64\explorer.exe
1⤵
- Accesses Microsoft Outlook profiles
- outlook_office_path
- outlook_win_path
PID:1284

C:\Windows\explorer.exe
C:\Windows\explorer.exe
1⤵
PID:492

C:\Windows\SysWOW64\explorer.exe
C:\Windows\SysWOW64\explorer.exe
1⤵
PID:916

C:\Windows\explorer.exe
C:\Windows\explorer.exe
1⤵
PID:1400

C:\Windows\SysWOW64\explorer.exe
C:\Windows\SysWOW64\explorer.exe
1⤵
PID:1184

C:\Windows\explorer.exe
C:\Windows\explorer.exe
1⤵
PID:1812

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
1KB

MD5
4280e36a29fa31c01e4d8b2ba726a0d8

SHA1
c485c2c9ce0a99747b18d899b71dfa9a64dabe32

SHA256
e2486a1bdcba80dad6dd6210d7374bd70ae196a523c06ceda71370fd3ea78359

SHA512
494fe5f0ade03669e5830bed93c964d69b86629440148d7b0881cf53203fd89443ebff9b4d1ee9d96244f62af6edede622d9eacba37f80f389a0d522e4ad4ea4

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
4ad4a7346a98651c6e7378e1d32f0722

SHA1
5ea0f55c35053dddab9d61caabbc4df71a4caf9f

SHA256
622f24402e12c24df9936ac49e78878b2f0bb08f1af3ab869e01d7c1e85aae50

SHA512
f1b8eab857b5d5a1a30a295a84c2e913ef7c043b253f8968505463f3534eb03e4b890105afaabf677e8641d6b7cda0480d4cb16d4d6779255f98c5507e2ad8ea

Download Submit
C:\Users\Admin\AppData\Local\Temp\BECC.exe

Filesize
25KB

MD5
378afc012094817b26459db696071baa

SHA1
e498fbb56ca9cbba1dc4ffea0840fcefe5a5a951

SHA256
d8ae15697fbd126606cd0e6e38ad4859667feca010786ae9fffef56c948a7ea3

SHA512
79c76d7ca2762460c7d338cfc92ffac56103795a262e04ab3c8ef8db1d33065b79508a003715c1435160fa6044170bfe8d7f459e687871ba386998dd88363828

Download Submit
C:\Users\Admin\AppData\Local\Temp\BECC.exe

Filesize
25KB

MD5
378afc012094817b26459db696071baa

SHA1
e498fbb56ca9cbba1dc4ffea0840fcefe5a5a951

SHA256
d8ae15697fbd126606cd0e6e38ad4859667feca010786ae9fffef56c948a7ea3

SHA512
79c76d7ca2762460c7d338cfc92ffac56103795a262e04ab3c8ef8db1d33065b79508a003715c1435160fa6044170bfe8d7f459e687871ba386998dd88363828

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bngrlzt1.2eg.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/492-189-0x0000000000100000-0x000000000010C000-memory.dmp

Filesize
48KB

Download
memory/492-188-0x0000000000100000-0x000000000010C000-memory.dmp

Filesize
48KB

Download
memory/828-162-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/828-166-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/828-164-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/916-207-0x0000000000A30000-0x0000000000A9B000-memory.dmp

Filesize
428KB

Download
memory/916-208-0x0000000000E00000-0x0000000000E0B000-memory.dmp

Filesize
44KB

Download
memory/916-206-0x0000000000E00000-0x0000000000E0B000-memory.dmp

Filesize
44KB

Download
memory/1184-227-0x00000000005B0000-0x00000000005B9000-memory.dmp

Filesize
36KB

Download
memory/1184-226-0x0000000004C70000-0x0000000004C80000-memory.dmp

Filesize
64KB

Download
memory/1184-225-0x00000000005B0000-0x00000000005B9000-memory.dmp

Filesize
36KB

Download
memory/1284-184-0x0000000000A30000-0x0000000000A9B000-memory.dmp

Filesize
428KB

Download
memory/1284-181-0x0000000000A30000-0x0000000000A9B000-memory.dmp

Filesize
428KB

Download
memory/1284-183-0x0000000000AA0000-0x0000000000B20000-memory.dmp

Filesize
512KB

Download
memory/1284-205-0x0000000000A30000-0x0000000000A9B000-memory.dmp

Filesize
428KB

Download
memory/1400-223-0x00000000012E0000-0x00000000012EF000-memory.dmp

Filesize
60KB

Download
memory/1400-210-0x00000000012E0000-0x00000000012EF000-memory.dmp

Filesize
60KB

Download
memory/1400-222-0x0000000004C70000-0x0000000004C80000-memory.dmp

Filesize
64KB

Download
memory/1812-228-0x00000000010A0000-0x00000000010AC000-memory.dmp

Filesize
48KB

Download
memory/1812-229-0x00000000010A0000-0x00000000010AC000-memory.dmp

Filesize
48KB

Download
memory/2272-221-0x0000000004C70000-0x0000000004C80000-memory.dmp

Filesize
64KB

Download
memory/3112-165-0x00000000012C0000-0x00000000012D6000-memory.dmp

Filesize
88KB

Download
memory/3192-155-0x0000000004CE0000-0x0000000004CF0000-memory.dmp

Filesize
64KB

Download
memory/3192-134-0x0000000004CE0000-0x0000000004CF0000-memory.dmp

Filesize
64KB

Download
memory/3192-135-0x0000000006210000-0x0000000006232000-memory.dmp

Filesize
136KB

Download
memory/3192-133-0x00000000003D0000-0x00000000003DC000-memory.dmp

Filesize
48KB

Download
memory/3908-182-0x0000000004CD0000-0x0000000004CE0000-memory.dmp

Filesize
64KB

Download
memory/3908-179-0x00000000004D0000-0x00000000004DC000-memory.dmp

Filesize
48KB

Download
memory/4568-136-0x0000000002A20000-0x0000000002A56000-memory.dmp

Filesize
216KB

Download
memory/4568-141-0x0000000002A10000-0x0000000002A20000-memory.dmp

Filesize
64KB

Download
memory/4568-140-0x00000000059B0000-0x0000000005A16000-memory.dmp

Filesize
408KB

Download
memory/4568-139-0x0000000002A10000-0x0000000002A20000-memory.dmp

Filesize
64KB

Download
memory/4568-153-0x0000000007660000-0x0000000007CDA000-memory.dmp

Filesize
6.5MB

Download
memory/4568-151-0x0000000005FF0000-0x000000000600E000-memory.dmp

Filesize
120KB

Download
memory/4568-152-0x0000000002A10000-0x0000000002A20000-memory.dmp

Filesize
64KB

Download
memory/4568-137-0x00000000050B0000-0x00000000056D8000-memory.dmp

Filesize
6.2MB

Download
memory/4568-158-0x0000000002A10000-0x0000000002A20000-memory.dmp

Filesize
64KB

Download
memory/4568-157-0x0000000002A10000-0x0000000002A20000-memory.dmp

Filesize
64KB

Download
memory/4568-156-0x0000000002A10000-0x0000000002A20000-memory.dmp

Filesize
64KB

Download
memory/4568-138-0x0000000005890000-0x00000000058F6000-memory.dmp

Filesize
408KB

Download
memory/4568-154-0x00000000064E0000-0x00000000064FA000-memory.dmp

Filesize
104KB

Download