quasar | 79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9

Analysis

max time kernel
149s
max time network
151s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
23/03/2025, 02:48

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General

Target

79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe
Size

6.7MB
MD5

818c5a007a2075f7c56eb69b75d12acb
SHA1

2f33d50e879a18ff744424855d6356bae8f2d5d9
SHA256

79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9
SHA512

f15717749deac968f48ac8c5df01368735658eca535efa19c1b5c2bcb3a1b1f065baa05b609b6526c384a6800b78adccfc8249aab8e7ce411041575303da8ec4
SSDEEP

196608:hwy9GeDVI5DKBWZlkgJedYs6LtYdEhqTgKDSy3n1B:hwykYVI5DK2NNs6LtYdEhSp24B

Score

10^/10

quasar office04 agilenet defense_evasion spyware themida trojan

Malware Config

Extracted

Family

quasar

Attributes

reconnect_delay
3000

Extracted

Family

quasar

Version

1.5.0

Botnet

Office04

movies-concerning.gl.at.ply.gg:12712

Mutex

5f7b0195-4eaf-4ae9-b4f8-cc2f6f6c4eb3

Attributes

encryption_key
27AAC11A05508545506D258070495FCDA9A82735
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Modded Client Startup
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 5 IoCs

resource	yara_rule
behavioral1/memory/1292-1-0x0000000000870000-0x0000000000F20000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016dd2-14.dat	family_quasar
behavioral1/memory/2876-15-0x00000000000F0000-0x0000000000180000-memory.dmp	family_quasar
behavioral1/memory/2876-18-0x00000000003F0000-0x0000000000408000-memory.dmp	family_quasar
behavioral1/memory/236-40-0x0000000000300000-0x0000000000390000-memory.dmp	family_quasar

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	Vortex Crypter.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Vortex Crypter.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Vortex Crypter.exe

Deletes itself 1 IoCs

pid	Process
2916	cmd.exe

Executes dropped EXE 3 IoCs

pid	Process
2844	Vortex Crypter.exe
2876	Client-built.exe
236	Client.exe

Loads dropped DLL 1 IoCs

pid	Process
2844	Vortex Crypter.exe

Obfuscated with Agile.Net obfuscator 3 IoCs

Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

agilenet

resource	yara_rule
behavioral1/memory/1292-1-0x0000000000870000-0x0000000000F20000-memory.dmp	agile_net
behavioral1/files/0x0008000000016dc7-10.dat	agile_net
behavioral1/memory/2844-16-0x0000000000F20000-0x0000000001508000-memory.dmp	agile_net

Themida packer 4 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/files/0x00070000000170b5-24.dat	themida
behavioral1/memory/2844-25-0x000007FEECAA0000-0x000007FEED252000-memory.dmp	themida
behavioral1/memory/2844-27-0x000007FEECAA0000-0x000007FEED252000-memory.dmp	themida
behavioral1/memory/2844-42-0x000007FEECAA0000-0x000007FEED252000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs

defense_evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Vortex Crypter.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2336	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2644	schtasks.exe
2696	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
236	Client.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1292	79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe

Suspicious use of AdjustPrivilegeToken 43 IoCs

description	pid	Process
Token: SeDebugPrivilege	1292	79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe
Token: SeIncreaseQuotaPrivilege	2080	WMIC.exe
Token: SeSecurityPrivilege	2080	WMIC.exe
Token: SeTakeOwnershipPrivilege	2080	WMIC.exe
Token: SeLoadDriverPrivilege	2080	WMIC.exe
Token: SeSystemProfilePrivilege	2080	WMIC.exe
Token: SeSystemtimePrivilege	2080	WMIC.exe
Token: SeProfSingleProcessPrivilege	2080	WMIC.exe
Token: SeIncBasePriorityPrivilege	2080	WMIC.exe
Token: SeCreatePagefilePrivilege	2080	WMIC.exe
Token: SeBackupPrivilege	2080	WMIC.exe
Token: SeRestorePrivilege	2080	WMIC.exe
Token: SeShutdownPrivilege	2080	WMIC.exe
Token: SeDebugPrivilege	2080	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2080	WMIC.exe
Token: SeRemoteShutdownPrivilege	2080	WMIC.exe
Token: SeUndockPrivilege	2080	WMIC.exe
Token: SeManageVolumePrivilege	2080	WMIC.exe
Token: 33	2080	WMIC.exe
Token: 34	2080	WMIC.exe
Token: 35	2080	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2080	WMIC.exe
Token: SeSecurityPrivilege	2080	WMIC.exe
Token: SeTakeOwnershipPrivilege	2080	WMIC.exe
Token: SeLoadDriverPrivilege	2080	WMIC.exe
Token: SeSystemProfilePrivilege	2080	WMIC.exe
Token: SeSystemtimePrivilege	2080	WMIC.exe
Token: SeProfSingleProcessPrivilege	2080	WMIC.exe
Token: SeIncBasePriorityPrivilege	2080	WMIC.exe
Token: SeCreatePagefilePrivilege	2080	WMIC.exe
Token: SeBackupPrivilege	2080	WMIC.exe
Token: SeRestorePrivilege	2080	WMIC.exe
Token: SeShutdownPrivilege	2080	WMIC.exe
Token: SeDebugPrivilege	2080	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2080	WMIC.exe
Token: SeRemoteShutdownPrivilege	2080	WMIC.exe
Token: SeUndockPrivilege	2080	WMIC.exe
Token: SeManageVolumePrivilege	2080	WMIC.exe
Token: 33	2080	WMIC.exe
Token: 34	2080	WMIC.exe
Token: 35	2080	WMIC.exe
Token: SeDebugPrivilege	2876	Client-built.exe
Token: SeDebugPrivilege	236	Client.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1292 wrote to memory of 2920	1292	79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe	30
PID 1292 wrote to memory of 2920	1292	79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe	30
PID 1292 wrote to memory of 2920	1292	79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe	30
PID 2920 wrote to memory of 2080	2920	cmd.exe	32
PID 2920 wrote to memory of 2080	2920	cmd.exe	32
PID 2920 wrote to memory of 2080	2920	cmd.exe	32
PID 1292 wrote to memory of 2844	1292	79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe	34
PID 1292 wrote to memory of 2844	1292	79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe	34
PID 1292 wrote to memory of 2844	1292	79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe	34
PID 1292 wrote to memory of 2876	1292	79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe	35
PID 1292 wrote to memory of 2876	1292	79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe	35
PID 1292 wrote to memory of 2876	1292	79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe	35
PID 1292 wrote to memory of 2916	1292	79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe	36
PID 1292 wrote to memory of 2916	1292	79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe	36
PID 1292 wrote to memory of 2916	1292	79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe	36
PID 2916 wrote to memory of 2336	2916	cmd.exe	38
PID 2916 wrote to memory of 2336	2916	cmd.exe	38
PID 2916 wrote to memory of 2336	2916	cmd.exe	38
PID 2876 wrote to memory of 2644	2876	Client-built.exe	39
PID 2876 wrote to memory of 2644	2876	Client-built.exe	39
PID 2876 wrote to memory of 2644	2876	Client-built.exe	39
PID 2844 wrote to memory of 2240	2844	Vortex Crypter.exe	41
PID 2844 wrote to memory of 2240	2844	Vortex Crypter.exe	41
PID 2844 wrote to memory of 2240	2844	Vortex Crypter.exe	41
PID 2876 wrote to memory of 236	2876	Client-built.exe	43
PID 2876 wrote to memory of 236	2876	Client-built.exe	43
PID 2876 wrote to memory of 236	2876	Client-built.exe	43
PID 236 wrote to memory of 2696	236	Client.exe	44
PID 236 wrote to memory of 2696	236	Client.exe	44
PID 236 wrote to memory of 2696	236	Client.exe	44

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

C:\Users\Admin\AppData\Local\Temp\79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe
"C:\Users\Admin\AppData\Local\Temp\79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1292
- C:\Windows\system32\cmd.exe
  "cmd" /C wmic path win32_ComputerSystem get model
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2920
- - C:\Windows\System32\Wbem\WMIC.exe
    wmic path win32_ComputerSystem get model
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2080
- C:\Users\Admin\AppData\Local\Temp\VMvTfUqnud\Vortex Crypter.exe
  "C:\Users\Admin\AppData\Local\Temp\VMvTfUqnud\Vortex Crypter.exe"
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks whether UAC is enabled
  - Suspicious use of WriteProcessMemory
  PID:2844
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -u -p 2844 -s 1108
    3⤵
    PID:2240
- C:\Users\Admin\AppData\Local\Temp\uymOBiAweCYw\Client-built.exe
  "C:\Users\Admin\AppData\Local\Temp\uymOBiAweCYw\Client-built.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2876
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Quasar Modded Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2644
- - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: AddClipboardFormatListener
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:236
  - - C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "Quasar Modded Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2696
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C TIMEOUT /T 3 && DEL /f "C:\Users\Admin\AppData\Local\Temp\79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9.exe"
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2916
- - C:\Windows\system32\timeout.exe
    TIMEOUT /T 3
    3⤵
    - Delays execution with timeout.exe
    PID:2336

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\VMvTfUqnud\Vortex Crypter.exe

Filesize
5.9MB

MD5
95373b3cad383bc50fe84a2a598b5cfb

SHA1
e65e24821a2167656a2bc2dffbb1bd82cd08aeec

SHA256
d02da3d3909dc335bee98ffb284ce5413c84d349137c236715a9f898eba6fa42

SHA512
9756fb770c8e6716328b1046fb0fd6bbccb16cbcdc7e05f581a47264f89ab0f5f9a691b1b0857a9f2fad1018ab81aa158de7a07446a28311f0aba3088b35b82e

Download Submit
C:\Users\Admin\AppData\Local\Temp\ec62652a-4173-490a-bf30-4c378c0dcdd3\AgileDotNetRT64.dll

Filesize
2.9MB

MD5
9bb6ed08af544d3738e60200d2804180

SHA1
5a40b484ca56b1ce59add4ec283e21d60070be02

SHA256
86d49f3894cc3de038abcde03803de8b6f239c237f34930ce5c41ab725c26cb7

SHA512
63e6b90457c3e3e6e419e30fe57e35c66e08059611fbe4ffb60d28acd6ee8d9f0ccfa31d7b27e9af44ab13512490f3b7b7f5130df947c5de50a937dcee0a91a5

Download Submit
C:\Users\Admin\AppData\Local\Temp\uymOBiAweCYw\Client-built.exe

Filesize
556KB

MD5
85410a49050c880d856c15b4c958d86d

SHA1
f520f25b5cd537b1060d8ca66f53bac745f8f8fa

SHA256
9365b6cee47eecc6eab2c6d138f0d5714c31ff1473143ce14ce874eb896f01b3

SHA512
94ac76b3fb61b14f39b9cc9848d530842c834ae32efede2da7c5ce3d062940a788391d7b22e888ec5b024dba7437ef043ee11554fe62509e1f71ee202791f7d5

Download Submit
memory/236-43-0x0000000000700000-0x000000000074E000-memory.dmp

Filesize
312KB

Download
memory/236-40-0x0000000000300000-0x0000000000390000-memory.dmp

Filesize
576KB

Download
memory/1292-1-0x0000000000870000-0x0000000000F20000-memory.dmp

Filesize
6.7MB

Download
memory/1292-2-0x000007FEF5700000-0x000007FEF60EC000-memory.dmp

Filesize
9.9MB

Download
memory/1292-17-0x000007FEF5700000-0x000007FEF60EC000-memory.dmp

Filesize
9.9MB

Download
memory/1292-0-0x000007FEF5703000-0x000007FEF5704000-memory.dmp

Filesize
4KB

Download
memory/2844-36-0x000007FEF4040000-0x000007FEF416C000-memory.dmp

Filesize
1.2MB

Download
memory/2844-25-0x000007FEECAA0000-0x000007FEED252000-memory.dmp

Filesize
7.7MB

Download
memory/2844-27-0x000007FEECAA0000-0x000007FEED252000-memory.dmp

Filesize
7.7MB

Download
memory/2844-16-0x0000000000F20000-0x0000000001508000-memory.dmp

Filesize
5.9MB

Download
memory/2844-42-0x000007FEECAA0000-0x000007FEED252000-memory.dmp

Filesize
7.7MB

Download
memory/2876-18-0x00000000003F0000-0x0000000000408000-memory.dmp

Filesize
96KB

Download
memory/2876-15-0x00000000000F0000-0x0000000000180000-memory.dmp

Filesize
576KB

Download