Malware Analysis Report

2025-08-05 21:25

Sample ID 231222-kvarnaeaar
Target 7f22451fdb349cf64713c504551fa5d8
SHA256 4eeeb09b82ac8340354fcb7b58f1845adff3d47e4f370e612cb1de7951362aef
Tags
upx evasion persistence trojan vmprotect
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

4eeeb09b82ac8340354fcb7b58f1845adff3d47e4f370e612cb1de7951362aef

Threat Level: Known bad

The file 7f22451fdb349cf64713c504551fa5d8 was found to be: Known bad.

Malicious Activity Summary

upx evasion persistence trojan vmprotect

Contains code to disable Windows Defender

Modifies WinLogon for persistence

UAC bypass

Downloads MZ/PE file

UPX packed file

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

VMProtect packed file

Legitimate hosting services abused for malware hosting/C2

Unsigned PE

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

System policy modification

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-22 08:54

Signatures

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-22 08:54

Reported

2023-12-22 10:31

Platform

win7-20231129-en

Max time kernel

141s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7f22451fdb349cf64713c504551fa5d8.exe"

Signatures

Contains code to disable Windows Defender

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Modifies WinLogon for persistence

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,\"C:\\Users\\Admin\\AppData\\Local\\Pic1fPBkmq\\LOHejsSdpL.exe\" -s" C:\Users\Admin\AppData\Local\Temp\7f22451fdb349cf64713c504551fa5d8.exe N/A

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\7f22451fdb349cf64713c504551fa5d8.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\BGtEXjsyJ0.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\7f22451fdb349cf64713c504551fa5d8.exe N/A

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

VMProtect packed file

vmprotect
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BGtEXjsyJ0.exe N/A

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\7f22451fdb349cf64713c504551fa5d8.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\7f22451fdb349cf64713c504551fa5d8.exe

"C:\Users\Admin\AppData\Local\Temp\7f22451fdb349cf64713c504551fa5d8.exe"

C:\Users\Admin\AppData\Local\Temp\BGtEXjsyJ0.exe

"C:\Users\Admin\AppData\Local\Temp\BGtEXjsyJ0.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 github.com udp
DE 140.82.121.3:443 github.com tcp

Files

memory/2544-0-0x0000000000400000-0x00000000007C6000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\BGtEXjsyJ0.exe

MD5 6878e18d54ad7599d01e56514c3452c5
SHA1 29e01d6cb27882f7c241fe853847280065a4d74e
SHA256 e547c04028ff938664acaaab0569d6ffc13546a88d5070a58c0c11b656f213b2
SHA512 1e9f1060373c869009f381430dca752147303e394df0318e9a5ccd66bd8ab94d9afd1d6dc3280cb01629476b9148f36d2e11e65ce54ee9433db103d3e83f07a8

memory/2544-5-0x0000000000900000-0x0000000000910000-memory.dmp

\Users\Admin\AppData\Local\Temp\BGtEXjsyJ0.exe

MD5 39de4b16741b8121cd4ab43867d41365
SHA1 ab9bb8b961c7a2944857c18daeef3bc38929975f
SHA256 955866bdf0f77778e5b1179dee9a0332c1989dc6c461b53ac90c23990b45efc7
SHA512 517be18595081f4354e8fc77122af0acd264577ac3ec7c269ab62aa7952ff55565501d08873971cd9ee9baf56131152c6a17e5282931920dc26d928c21b6af5d

C:\Users\Admin\AppData\Local\Temp\BGtEXjsyJ0.exe

MD5 7065d6cee16f88c07edba65d0646c78e
SHA1 bdf4a1b44bfa8cbd77a2817440a67a40dcf41b56
SHA256 5817d61c0f6cf854c010f1db4a61683373605a8addc11f96d65bad891978855f
SHA512 50cb8dfb85a5ab19e6596036df1cf367bad92ecc56e5fbea07f87b11a153c9a058d2ffef84a5e70c149de8b0d11078cfdb0244acc7c3a5ccd5c0224fd89794b6

memory/856-12-0x0000000073F40000-0x000000007462E000-memory.dmp

memory/856-11-0x0000000000D00000-0x0000000000F7E000-memory.dmp

memory/856-14-0x0000000000A80000-0x0000000000ADC000-memory.dmp

memory/856-13-0x0000000004A30000-0x0000000004A70000-memory.dmp

memory/856-15-0x0000000004DB0000-0x0000000004E5A000-memory.dmp

memory/856-16-0x0000000004A30000-0x0000000004A70000-memory.dmp

memory/2544-18-0x0000000000400000-0x00000000007C6000-memory.dmp

memory/2544-19-0x0000000000900000-0x0000000000910000-memory.dmp

memory/856-20-0x0000000073F40000-0x000000007462E000-memory.dmp

memory/856-22-0x0000000004A30000-0x0000000004A70000-memory.dmp

memory/856-23-0x0000000004A30000-0x0000000004A70000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-22 08:54

Reported

2023-12-22 10:31

Platform

win10v2004-20231215-en

Max time kernel

143s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7f22451fdb349cf64713c504551fa5d8.exe"

Signatures

Contains code to disable Windows Defender

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Modifies WinLogon for persistence

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,\"C:\\Users\\Admin\\AppData\\Local\\Pic1fPBkmq\\LOHejsSdpL.exe\" -s" C:\Users\Admin\AppData\Local\Temp\7f22451fdb349cf64713c504551fa5d8.exe N/A

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\7f22451fdb349cf64713c504551fa5d8.exe N/A

Downloads MZ/PE file

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\7f22451fdb349cf64713c504551fa5d8.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\8XDrnIyHFF.exe N/A

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

VMProtect packed file

vmprotect
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Legitimate hosting services abused for malware hosting/C2

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\8XDrnIyHFF.exe N/A

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\7f22451fdb349cf64713c504551fa5d8.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\7f22451fdb349cf64713c504551fa5d8.exe

"C:\Users\Admin\AppData\Local\Temp\7f22451fdb349cf64713c504551fa5d8.exe"

C:\Users\Admin\AppData\Local\Temp\8XDrnIyHFF.exe

"C:\Users\Admin\AppData\Local\Temp\8XDrnIyHFF.exe"

Network

Country Destination Domain Proto
NL 52.142.223.178:80 tcp
US 8.8.8.8:53 149.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 github.com udp
DE 140.82.121.3:443 github.com tcp
US 8.8.8.8:53 raw.githubusercontent.com udp
US 185.199.108.133:443 raw.githubusercontent.com tcp
US 8.8.8.8:53 3.121.82.140.in-addr.arpa udp
US 8.8.8.8:53 133.108.199.185.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 209.80.50.20.in-addr.arpa udp

Files

memory/3708-0-0x0000000000400000-0x00000000007C6000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\8XDrnIyHFF.exe

MD5 1a3b165f0b90ea336b0a60deda37a114
SHA1 544433f1d7279d84252ae0caa007eea90651844d
SHA256 56c2d26dfa12fc48b0c5005b228bc8b4956c05809d55f8e5b7b3749d9538346c
SHA512 0329b7e5ed9140cdde87abb2c2f3fca4737c703cd19124c92137bbd397b2d1a068bdd6bb2b43b6536b84cdf19760af7d5d863188f3963d1901f0a65967aeca9d

memory/4772-14-0x00000000005A0000-0x000000000081E000-memory.dmp

memory/4772-15-0x00000000735F0000-0x0000000073DA0000-memory.dmp

memory/4772-16-0x0000000009C10000-0x000000000A1B4000-memory.dmp

memory/4772-17-0x0000000009700000-0x0000000009792000-memory.dmp

memory/4772-18-0x0000000002AE0000-0x0000000002AF0000-memory.dmp

memory/4772-19-0x00000000097A0000-0x00000000097FC000-memory.dmp

memory/4772-20-0x0000000009930000-0x000000000993A000-memory.dmp

memory/4772-21-0x000000000A9F0000-0x000000000AA9A000-memory.dmp

memory/4772-22-0x0000000002AE0000-0x0000000002AF0000-memory.dmp

memory/3708-25-0x0000000000400000-0x00000000007C6000-memory.dmp

memory/4772-27-0x00000000735F0000-0x0000000073DA0000-memory.dmp

memory/4772-28-0x0000000002AE0000-0x0000000002AF0000-memory.dmp

memory/4772-29-0x0000000002AE0000-0x0000000002AF0000-memory.dmp