arkei | b826af3338b2d2f0c6b5427ba25a47661ca142e9f331b6443255f359c44036fe

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06-03-2024 07:55

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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

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\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection	b6e95ff23f2e0793f36543b91d0d0a0a.exe

Turns off Windows Defender SpyNet reporting 2 TTPs
evasion

Disable or Modify Tools
T1562.001

Modify Registry
T1112

Windows security bypass 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
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\Exclusions\Paths	b6e95ff23f2e0793f36543b91d0d0a0a.exe

Nirsoft 1 IoCs

resource	yara_rule
behavioral2/files/0x0009000000023204-15.dat	Nirsoft

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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	AdvancedRun.exe
Key value queried	\REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	b6e95ff23f2e0793f36543b91d0d0a0a.exe

Executes dropped EXE 2 IoCs

pid	Process
1548	AdvancedRun.exe
2004	AdvancedRun.exe

Windows security modification 2 TTPs 10 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
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions\Paths	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Real-Time Protection\DisableRealtimeMonitoring = "1"	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Spynet	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Spynet\SpyNetReporting = "0"	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	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\Spynet\SubmitSamplesConsent = "0"	b6e95ff23f2e0793f36543b91d0d0a0a.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4804 set thread context of 3152	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	97

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1548	AdvancedRun.exe
1548	AdvancedRun.exe
1548	AdvancedRun.exe
1548	AdvancedRun.exe
2004	AdvancedRun.exe
2004	AdvancedRun.exe
2004	AdvancedRun.exe
2004	AdvancedRun.exe
3080	powershell.exe
3080	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1548	AdvancedRun.exe
Token: SeImpersonatePrivilege	1548	AdvancedRun.exe
Token: SeDebugPrivilege	2004	AdvancedRun.exe
Token: SeImpersonatePrivilege	2004	AdvancedRun.exe
Token: SeDebugPrivilege	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe
Token: SeDebugPrivilege	3080	powershell.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4804 wrote to memory of 1548	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	90
PID 4804 wrote to memory of 1548	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	90
PID 4804 wrote to memory of 1548	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	90
PID 1548 wrote to memory of 2004	1548	AdvancedRun.exe	91
PID 1548 wrote to memory of 2004	1548	AdvancedRun.exe	91
PID 1548 wrote to memory of 2004	1548	AdvancedRun.exe	91
PID 4804 wrote to memory of 3080	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	95
PID 4804 wrote to memory of 3080	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	95
PID 4804 wrote to memory of 3080	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	95
PID 4804 wrote to memory of 3152	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	97
PID 4804 wrote to memory of 3152	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	97
PID 4804 wrote to memory of 3152	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	97
PID 4804 wrote to memory of 3152	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	97
PID 4804 wrote to memory of 3152	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	97
PID 4804 wrote to memory of 3152	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	97
PID 4804 wrote to memory of 3152	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	97
PID 4804 wrote to memory of 3152	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	97
PID 4804 wrote to memory of 3152	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	97
PID 4804 wrote to memory of 3152	4804	b6e95ff23f2e0793f36543b91d0d0a0a.exe	97

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
- Checks computer location settings
- Windows security modification
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4804
- C:\Users\Admin\AppData\Local\Temp\419f21b1-2d68-4d82-8c82-8451583c203d\AdvancedRun.exe
  "C:\Users\Admin\AppData\Local\Temp\419f21b1-2d68-4d82-8c82-8451583c203d\AdvancedRun.exe" /EXEFilename "C:\Users\Admin\AppData\Local\Temp\419f21b1-2d68-4d82-8c82-8451583c203d\test.bat" /WindowState ""0"" /PriorityClass ""32"" /CommandLine "" /StartDirectory "" /RunAs 8 /Run
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1548
- - C:\Users\Admin\AppData\Local\Temp\419f21b1-2d68-4d82-8c82-8451583c203d\AdvancedRun.exe
    "C:\Users\Admin\AppData\Local\Temp\419f21b1-2d68-4d82-8c82-8451583c203d\AdvancedRun.exe" /SpecialRun 4101d8 1548
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2004
- 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:3080
- C:\Users\Admin\AppData\Local\Temp\b6e95ff23f2e0793f36543b91d0d0a0a.exe
  "C:\Users\Admin\AppData\Local\Temp\b6e95ff23f2e0793f36543b91d0d0a0a.exe"
  2⤵
  PID:3152

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\419f21b1-2d68-4d82-8c82-8451583c203d\AdvancedRun.exe

Filesize
88KB

MD5
17fc12902f4769af3a9271eb4e2dacce

SHA1
9a4a1581cc3971579574f837e110f3bd6d529dab

SHA256
29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

SHA512
036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_luqs54oq.ocv.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3080-65-0x00000000076B0000-0x0000000007D2A000-memory.dmp

Filesize
6.5MB

Download
memory/3080-32-0x0000000002440000-0x0000000002450000-memory.dmp

Filesize
64KB

Download
memory/3080-47-0x0000000005950000-0x0000000005CA4000-memory.dmp

Filesize
3.3MB

Download
memory/3080-64-0x0000000006D80000-0x0000000006E23000-memory.dmp

Filesize
652KB

Download
memory/3080-76-0x0000000074920000-0x00000000750D0000-memory.dmp

Filesize
7.7MB

Download
memory/3080-73-0x0000000007380000-0x0000000007388000-memory.dmp

Filesize
32KB

Download
memory/3080-72-0x00000000073A0000-0x00000000073BA000-memory.dmp

Filesize
104KB

Download
memory/3080-42-0x0000000005720000-0x0000000005786000-memory.dmp

Filesize
408KB

Download
memory/3080-71-0x00000000072A0000-0x00000000072B4000-memory.dmp

Filesize
80KB

Download
memory/3080-63-0x0000000006300000-0x000000000631E000-memory.dmp

Filesize
120KB

Download
memory/3080-30-0x0000000002450000-0x0000000002486000-memory.dmp

Filesize
216KB

Download
memory/3080-29-0x0000000002440000-0x0000000002450000-memory.dmp

Filesize
64KB

Download
memory/3080-35-0x00000000055A0000-0x00000000055C2000-memory.dmp

Filesize
136KB

Download
memory/3080-53-0x00000000711E0000-0x000000007122C000-memory.dmp

Filesize
304KB

Download
memory/3080-26-0x0000000074920000-0x00000000750D0000-memory.dmp

Filesize
7.7MB

Download
memory/3080-66-0x0000000007060000-0x000000000707A000-memory.dmp

Filesize
104KB

Download
memory/3080-70-0x0000000007290000-0x000000000729E000-memory.dmp

Filesize
56KB

Download
memory/3080-34-0x0000000004F40000-0x0000000005568000-memory.dmp

Filesize
6.2MB

Download
memory/3080-69-0x0000000007260000-0x0000000007271000-memory.dmp

Filesize
68KB

Download
memory/3080-41-0x0000000005640000-0x00000000056A6000-memory.dmp

Filesize
408KB

Download
memory/3080-52-0x0000000006330000-0x0000000006362000-memory.dmp

Filesize
200KB

Download
memory/3080-68-0x00000000072E0000-0x0000000007376000-memory.dmp

Filesize
600KB

Download
memory/3080-67-0x00000000070D0000-0x00000000070DA000-memory.dmp

Filesize
40KB

Download
memory/3080-48-0x0000000005D50000-0x0000000005D6E000-memory.dmp

Filesize
120KB

Download
memory/3080-49-0x0000000005DA0000-0x0000000005DEC000-memory.dmp

Filesize
304KB

Download
memory/3080-50-0x0000000002440000-0x0000000002450000-memory.dmp

Filesize
64KB

Download
memory/3080-51-0x000000007F890000-0x000000007F8A0000-memory.dmp

Filesize
64KB

Download
memory/3152-31-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/3152-28-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/3152-24-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/3152-77-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/4804-9-0x0000000005290000-0x00000000052AE000-memory.dmp

Filesize
120KB

Download
memory/4804-0-0x00000000006D0000-0x000000000073C000-memory.dmp

Filesize
432KB

Download
memory/4804-4-0x00000000052B0000-0x00000000052C0000-memory.dmp

Filesize
64KB

Download
memory/4804-3-0x0000000005070000-0x0000000005102000-memory.dmp

Filesize
584KB

Download
memory/4804-1-0x0000000074920000-0x00000000750D0000-memory.dmp

Filesize
7.7MB

Download
memory/4804-33-0x0000000074920000-0x00000000750D0000-memory.dmp

Filesize
7.7MB

Download
memory/4804-2-0x0000000005580000-0x0000000005B24000-memory.dmp

Filesize
5.6MB

Download
memory/4804-8-0x0000000005200000-0x0000000005268000-memory.dmp

Filesize
416KB

Download
memory/4804-7-0x0000000005360000-0x00000000053D6000-memory.dmp

Filesize
472KB

Download
memory/4804-6-0x00000000052C0000-0x000000000535C000-memory.dmp

Filesize
624KB

Download
memory/4804-5-0x0000000005000000-0x000000000500A000-memory.dmp

Filesize
40KB

Download