arkei | b826af3338b2d2f0c6b5427ba25a47661ca142e9f331b6443255f359c44036fe

General

Target

b6e95ff23f2e0793f36543b91d0d0a0a.exe
Size

409KB
MD5

b6e95ff23f2e0793f36543b91d0d0a0a
SHA1

072c8321280f2ceded6a906724ca974875f41146
SHA256

b826af3338b2d2f0c6b5427ba25a47661ca142e9f331b6443255f359c44036fe
SHA512

4a8a8242f86aee5c2efca76298965ddfe0af48d761c6bbd9a648f78f591db72033aa804d3d066b63a99e6a3499fdd61475b09be36238f5bc993285d1e1fda4c5
SSDEEP

6144:0t76RZpCr6xDmBKUtCcgQm3qOjgsVP/RG4vDuK8tFAnpLL/Y6afliNiqxm:0p6o6xDuFtdwjBLG4buJgtY6iqI

Score

10^/10

arkei evasion stealer trojan

Malware Config

Extracted

Family

arkei

C2

185.224.139.233/MwJRWa1FHk.php

Signatures

Arkei
Arkei is an infostealer written in C++.
stealer arkei

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	b6e95ff23f2e0793f36543b91d0d0a0a.exe

Windows security bypass 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions\Paths	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\b6e95ff23f2e0793f36543b91d0d0a0a.exe = "0"	b6e95ff23f2e0793f36543b91d0d0a0a.exe

Nirsoft 1 IoCs

resource	yara_rule
behavioral1/files/0x000c00000001340b-7.dat	Nirsoft

Executes dropped EXE 2 IoCs

pid	Process
2504	AdvancedRun.exe
2636	AdvancedRun.exe

Loads dropped DLL 4 IoCs

pid	Process
2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe
2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe
2504	AdvancedRun.exe
2504	AdvancedRun.exe

Windows security modification 2 TTPs 8 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions\Paths	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\b6e95ff23f2e0793f36543b91d0d0a0a.exe = "0"	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Real-Time Protection	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Real-Time Protection\DisableRealtimeMonitoring = "1"	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Spynet\SubmitSamplesConsent = "0"	b6e95ff23f2e0793f36543b91d0d0a0a.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2000 set thread context of 2324	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	32

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2504	AdvancedRun.exe
2504	AdvancedRun.exe
2636	AdvancedRun.exe
2636	AdvancedRun.exe
2796	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2504	AdvancedRun.exe
Token: SeImpersonatePrivilege	2504	AdvancedRun.exe
Token: SeDebugPrivilege	2636	AdvancedRun.exe
Token: SeImpersonatePrivilege	2636	AdvancedRun.exe
Token: SeDebugPrivilege	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Token: SeDebugPrivilege	2796	powershell.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2000 wrote to memory of 2504	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	28
PID 2000 wrote to memory of 2504	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	28
PID 2000 wrote to memory of 2504	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	28
PID 2000 wrote to memory of 2504	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	28
PID 2504 wrote to memory of 2636	2504	AdvancedRun.exe	29
PID 2504 wrote to memory of 2636	2504	AdvancedRun.exe	29
PID 2504 wrote to memory of 2636	2504	AdvancedRun.exe	29
PID 2504 wrote to memory of 2636	2504	AdvancedRun.exe	29
PID 2000 wrote to memory of 2796	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	30
PID 2000 wrote to memory of 2796	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	30
PID 2000 wrote to memory of 2796	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	30
PID 2000 wrote to memory of 2796	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	30
PID 2000 wrote to memory of 2324	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	32
PID 2000 wrote to memory of 2324	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	32
PID 2000 wrote to memory of 2324	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	32
PID 2000 wrote to memory of 2324	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	32
PID 2000 wrote to memory of 2324	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	32
PID 2000 wrote to memory of 2324	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	32
PID 2000 wrote to memory of 2324	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	32
PID 2000 wrote to memory of 2324	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	32
PID 2000 wrote to memory of 2324	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	32
PID 2000 wrote to memory of 2324	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	32
PID 2000 wrote to memory of 2324	2000	b6e95ff23f2e0793f36543b91d0d0a0a.exe	32

C:\Users\Admin\AppData\Local\Temp\b6e95ff23f2e0793f36543b91d0d0a0a.exe
"C:\Users\Admin\AppData\Local\Temp\b6e95ff23f2e0793f36543b91d0d0a0a.exe"
1⤵
- Modifies Windows Defender Real-time Protection settings
- Windows security bypass
- Loads dropped DLL
- Windows security modification
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2000
- C:\Users\Admin\AppData\Local\Temp\b73ba4cb-4a1a-4759-90dc-0db8825adb3d\AdvancedRun.exe
  "C:\Users\Admin\AppData\Local\Temp\b73ba4cb-4a1a-4759-90dc-0db8825adb3d\AdvancedRun.exe" /EXEFilename "C:\Users\Admin\AppData\Local\Temp\b73ba4cb-4a1a-4759-90dc-0db8825adb3d\test.bat" /WindowState ""0"" /PriorityClass ""32"" /CommandLine "" /StartDirectory "" /RunAs 8 /Run
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2504
- - C:\Users\Admin\AppData\Local\Temp\b73ba4cb-4a1a-4759-90dc-0db8825adb3d\AdvancedRun.exe
    "C:\Users\Admin\AppData\Local\Temp\b73ba4cb-4a1a-4759-90dc-0db8825adb3d\AdvancedRun.exe" /SpecialRun 4101d8 2504
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2636
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\b6e95ff23f2e0793f36543b91d0d0a0a.exe" -Force
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2796
- C:\Users\Admin\AppData\Local\Temp\b6e95ff23f2e0793f36543b91d0d0a0a.exe
  "C:\Users\Admin\AppData\Local\Temp\b6e95ff23f2e0793f36543b91d0d0a0a.exe"
  2⤵
  PID:2324

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Privilege Escalation

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Defense Evasion

Impair Defenses

3

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\b73ba4cb-4a1a-4759-90dc-0db8825adb3d\AdvancedRun.exe

Filesize
88KB

MD5
17fc12902f4769af3a9271eb4e2dacce

SHA1
9a4a1581cc3971579574f837e110f3bd6d529dab

SHA256
29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

SHA512
036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

Download Submit
memory/2000-0-0x0000000000990000-0x00000000009FC000-memory.dmp

Filesize
432KB

Download
memory/2000-1-0x0000000074390000-0x0000000074A7E000-memory.dmp

Filesize
6.9MB

Download
memory/2000-2-0x0000000004C30000-0x0000000004C70000-memory.dmp

Filesize
256KB

Download
memory/2000-3-0x0000000004140000-0x00000000041A8000-memory.dmp

Filesize
416KB

Download
memory/2000-42-0x0000000074390000-0x0000000074A7E000-memory.dmp

Filesize
6.9MB

Download
memory/2324-29-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2324-33-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2324-25-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2324-45-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2324-21-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2324-43-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2324-41-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2324-23-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2324-19-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2324-37-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2324-39-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2796-36-0x0000000002930000-0x0000000002970000-memory.dmp

Filesize
256KB

Download
memory/2796-34-0x0000000002930000-0x0000000002970000-memory.dmp

Filesize
256KB

Download
memory/2796-32-0x000000006EF90000-0x000000006F53B000-memory.dmp

Filesize
5.7MB

Download
memory/2796-44-0x000000006EF90000-0x000000006F53B000-memory.dmp

Filesize
5.7MB

Download
memory/2796-30-0x000000006EF90000-0x000000006F53B000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads