Malware Analysis Report

2025-04-14 05:06

Sample ID 230106-jjgv6afc98
Target 0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549
SHA256 0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549
Tags
quasar office04 spyware trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549

Threat Level: Known bad

The file 0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549 was found to be: Known bad.

Malicious Activity Summary

quasar office04 spyware trojan

Quasar RAT

Quasar payload

Executes dropped EXE

Loads dropped DLL

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

Suspicious use of SendNotifyMessage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-01-06 07:41

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-01-06 07:41

Reported

2023-01-06 07:44

Platform

win7-20221111-en

Max time kernel

143s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: SeCreateGlobalPrivilege N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\~5601255605575869330~\sg.tmp N/A
Token: 35 N/A C:\Users\Admin\AppData\Local\Temp\~5601255605575869330~\sg.tmp N/A
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\~5601255605575869330~\sg.tmp N/A
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\~5601255605575869330~\sg.tmp N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\~3450487590977295312\loader.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\~3450487590977295312\loader.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\~3450487590977295312\loader.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2032 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe C:\Windows\system32\cmd.exe
PID 2032 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe C:\Windows\system32\cmd.exe
PID 2032 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe C:\Windows\system32\cmd.exe
PID 2032 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe C:\Windows\system32\cmd.exe
PID 2032 wrote to memory of 860 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe C:\Users\Admin\AppData\Local\Temp\~5601255605575869330~\sg.tmp
PID 2032 wrote to memory of 860 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe C:\Users\Admin\AppData\Local\Temp\~5601255605575869330~\sg.tmp
PID 2032 wrote to memory of 860 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe C:\Users\Admin\AppData\Local\Temp\~5601255605575869330~\sg.tmp
PID 2032 wrote to memory of 860 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe C:\Users\Admin\AppData\Local\Temp\~5601255605575869330~\sg.tmp
PID 2032 wrote to memory of 1496 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe C:\Users\Admin\AppData\Local\Temp\~3450487590977295312\loader.exe
PID 2032 wrote to memory of 1496 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe C:\Users\Admin\AppData\Local\Temp\~3450487590977295312\loader.exe
PID 2032 wrote to memory of 1496 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe C:\Users\Admin\AppData\Local\Temp\~3450487590977295312\loader.exe
PID 2032 wrote to memory of 1496 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe C:\Users\Admin\AppData\Local\Temp\~3450487590977295312\loader.exe

Processes

C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe

"C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe"

C:\Windows\system32\cmd.exe

cmd.exe /c set

C:\Users\Admin\AppData\Local\Temp\~5601255605575869330~\sg.tmp

7zG_exe x "C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe" -y -aoa -o"C:\Users\Admin\AppData\Local\Temp\~3450487590977295312"

C:\Users\Admin\AppData\Local\Temp\~3450487590977295312\loader.exe

"C:\Users\Admin\AppData\Local\Temp\~3450487590977295312\loader.exe"

Network

Country Destination Domain Proto
N/A 192.168.0.56:4782 tcp
N/A 192.168.0.161:4782 tcp
N/A 192.168.0.56:4782 tcp
N/A 192.168.0.161:4782 tcp
N/A 192.168.0.56:4782 tcp
N/A 192.168.0.161:4782 tcp

Files

memory/2032-54-0x0000000076651000-0x0000000076653000-memory.dmp

memory/1992-55-0x0000000000000000-mapping.dmp

\Users\Admin\AppData\Local\Temp\~5601255605575869330~\sg.tmp

MD5 7c4718943bd3f66ebdb47ccca72c7b1e
SHA1 f9edfaa7adb8fa528b2e61b2b251f18da10a6969
SHA256 4cc32d00338fc7b206a7c052297acf9ac304ae7de9d61a2475a116959c1524fc
SHA512 e18c40d646fa4948f90f7471da55489df431f255041ebb6dcef86346f91078c9b27894e27216a4b2fe2a1c5e501c7953c77893cf696930123d28a322d49e1516

C:\Users\Admin\AppData\Local\Temp\~5601255605575869330~\sg.tmp

MD5 7c4718943bd3f66ebdb47ccca72c7b1e
SHA1 f9edfaa7adb8fa528b2e61b2b251f18da10a6969
SHA256 4cc32d00338fc7b206a7c052297acf9ac304ae7de9d61a2475a116959c1524fc
SHA512 e18c40d646fa4948f90f7471da55489df431f255041ebb6dcef86346f91078c9b27894e27216a4b2fe2a1c5e501c7953c77893cf696930123d28a322d49e1516

memory/860-57-0x0000000000000000-mapping.dmp

\Users\Admin\AppData\Local\Temp\~3450487590977295312\loader.exe

MD5 3f9c08c6ac811c44e9342ad3df4d2948
SHA1 b05e04558d24251c0e3a34fc022e4121d276543b
SHA256 026af6d40ae1d1bb5a948180d0d45c691abe8d5b8165f744586af8ae4d9d774b
SHA512 cc8e4e21e4213e8c616b37b03711ac22c0ef17d2c666f8ff1429f0936eb486d5c14c73d6ea2bf6d4240bf65823e4ab99db1a5f6f3ab500ba435db9880efc7072

C:\Users\Admin\AppData\Local\Temp\~3450487590977295312\loader.exe

MD5 3f9c08c6ac811c44e9342ad3df4d2948
SHA1 b05e04558d24251c0e3a34fc022e4121d276543b
SHA256 026af6d40ae1d1bb5a948180d0d45c691abe8d5b8165f744586af8ae4d9d774b
SHA512 cc8e4e21e4213e8c616b37b03711ac22c0ef17d2c666f8ff1429f0936eb486d5c14c73d6ea2bf6d4240bf65823e4ab99db1a5f6f3ab500ba435db9880efc7072

\Users\Admin\AppData\Local\Temp\~3450487590977295312\loader.exe

MD5 3f9c08c6ac811c44e9342ad3df4d2948
SHA1 b05e04558d24251c0e3a34fc022e4121d276543b
SHA256 026af6d40ae1d1bb5a948180d0d45c691abe8d5b8165f744586af8ae4d9d774b
SHA512 cc8e4e21e4213e8c616b37b03711ac22c0ef17d2c666f8ff1429f0936eb486d5c14c73d6ea2bf6d4240bf65823e4ab99db1a5f6f3ab500ba435db9880efc7072

C:\Users\Admin\AppData\Local\Temp\~3450487590977295312\loader.exe

MD5 3f9c08c6ac811c44e9342ad3df4d2948
SHA1 b05e04558d24251c0e3a34fc022e4121d276543b
SHA256 026af6d40ae1d1bb5a948180d0d45c691abe8d5b8165f744586af8ae4d9d774b
SHA512 cc8e4e21e4213e8c616b37b03711ac22c0ef17d2c666f8ff1429f0936eb486d5c14c73d6ea2bf6d4240bf65823e4ab99db1a5f6f3ab500ba435db9880efc7072

memory/1496-62-0x0000000000000000-mapping.dmp

memory/2032-64-0x0000000000400000-0x0000000000563000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\~3450487590977295312\app.bin

MD5 632db56ddfc587812da2cb482ab430c6
SHA1 00ef4c88ce9c920998885c98f1d636b241389531
SHA256 94c93329954c37a0cb402c733bd24b8057837fa98d5361bfc0d54536490f3c46
SHA512 a1c712bf7ffc4065ae5bf6a1471c116d86590ae4a08999e23020c42b9e781065882a8ced24f78be9a5fcd2080fa873c52ec1e92d9057b631554b5bbd8e3b3705

memory/1496-66-0x0000000027B60000-0x0000000027BE2000-memory.dmp

memory/1496-67-0x0000000027F80000-0x0000000028004000-memory.dmp

memory/2032-68-0x0000000000400000-0x0000000000563000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-01-06 07:41

Reported

2023-01-06 07:44

Platform

win10v2004-20220812-en

Max time kernel

139s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe"

Signatures

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: SeCreateGlobalPrivilege N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\~7837897172764831759~\sg.tmp N/A
Token: 35 N/A C:\Users\Admin\AppData\Local\Temp\~7837897172764831759~\sg.tmp N/A
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\~7837897172764831759~\sg.tmp N/A
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\~7837897172764831759~\sg.tmp N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\~7111226896324501815\loader.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\~7111226896324501815\loader.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\~7111226896324501815\loader.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe

"C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe"

C:\Windows\SYSTEM32\cmd.exe

cmd.exe /c set

C:\Users\Admin\AppData\Local\Temp\~7837897172764831759~\sg.tmp

7zG_exe x "C:\Users\Admin\AppData\Local\Temp\0490dda2fe186588483066df7218d19ab4406e462911a4fa4d9ae45c1829a549.exe" -y -aoa -o"C:\Users\Admin\AppData\Local\Temp\~7111226896324501815"

C:\Users\Admin\AppData\Local\Temp\~7111226896324501815\loader.exe

"C:\Users\Admin\AppData\Local\Temp\~7111226896324501815\loader.exe"

Network

Country Destination Domain Proto
N/A 192.168.0.56:4782 tcp
N/A 95.101.78.82:80 tcp
N/A 192.168.0.161:4782 tcp
N/A 20.42.65.85:443 tcp
N/A 209.197.3.8:80 tcp
N/A 209.197.3.8:80 tcp
N/A 209.197.3.8:80 tcp
N/A 192.168.0.56:4782 tcp
N/A 192.168.0.161:4782 tcp
N/A 8.8.8.8:53 106.89.54.20.in-addr.arpa udp
N/A 8.248.5.254:80 tcp
N/A 192.168.0.56:4782 tcp
N/A 192.168.0.161:4782 tcp

Files

memory/4500-132-0x0000000000400000-0x0000000000563000-memory.dmp

memory/4232-133-0x0000000000000000-mapping.dmp

memory/3052-134-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Local\Temp\~7837897172764831759~\sg.tmp

MD5 7c4718943bd3f66ebdb47ccca72c7b1e
SHA1 f9edfaa7adb8fa528b2e61b2b251f18da10a6969
SHA256 4cc32d00338fc7b206a7c052297acf9ac304ae7de9d61a2475a116959c1524fc
SHA512 e18c40d646fa4948f90f7471da55489df431f255041ebb6dcef86346f91078c9b27894e27216a4b2fe2a1c5e501c7953c77893cf696930123d28a322d49e1516

memory/4416-136-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Local\Temp\~7111226896324501815\loader.exe

MD5 3f9c08c6ac811c44e9342ad3df4d2948
SHA1 b05e04558d24251c0e3a34fc022e4121d276543b
SHA256 026af6d40ae1d1bb5a948180d0d45c691abe8d5b8165f744586af8ae4d9d774b
SHA512 cc8e4e21e4213e8c616b37b03711ac22c0ef17d2c666f8ff1429f0936eb486d5c14c73d6ea2bf6d4240bf65823e4ab99db1a5f6f3ab500ba435db9880efc7072

C:\Users\Admin\AppData\Local\Temp\~7111226896324501815\loader.exe

MD5 3f9c08c6ac811c44e9342ad3df4d2948
SHA1 b05e04558d24251c0e3a34fc022e4121d276543b
SHA256 026af6d40ae1d1bb5a948180d0d45c691abe8d5b8165f744586af8ae4d9d774b
SHA512 cc8e4e21e4213e8c616b37b03711ac22c0ef17d2c666f8ff1429f0936eb486d5c14c73d6ea2bf6d4240bf65823e4ab99db1a5f6f3ab500ba435db9880efc7072

C:\Users\Admin\AppData\Local\Temp\~7111226896324501815\app.bin

MD5 632db56ddfc587812da2cb482ab430c6
SHA1 00ef4c88ce9c920998885c98f1d636b241389531
SHA256 94c93329954c37a0cb402c733bd24b8057837fa98d5361bfc0d54536490f3c46
SHA512 a1c712bf7ffc4065ae5bf6a1471c116d86590ae4a08999e23020c42b9e781065882a8ced24f78be9a5fcd2080fa873c52ec1e92d9057b631554b5bbd8e3b3705

memory/4416-140-0x0000011225600000-0x0000011225682000-memory.dmp

memory/4416-141-0x00007FF8D0450000-0x00007FF8D0F11000-memory.dmp

memory/4416-142-0x000001127FEF0000-0x000001127FF40000-memory.dmp

memory/4416-143-0x0000011280000000-0x00000112800B2000-memory.dmp

memory/4500-144-0x0000000000400000-0x0000000000563000-memory.dmp

memory/4416-145-0x00007FF8D0450000-0x00007FF8D0F11000-memory.dmp