quasar | 3f50cb0f25bc9fdaa5c75865eaca04ed12f45d5419b6624f1cf0f507be3cdafe

General

Target

cela.exe
Size

930KB
MD5

507c92e12c99eb53544aba006004b843
SHA1

11205b1e7e9317192994f5a9037d0f9924f29469
SHA256

3f50cb0f25bc9fdaa5c75865eaca04ed12f45d5419b6624f1cf0f507be3cdafe
SHA512

21b13fa6b070f3fecab15fe8c4124c4ec592b2886eff6a9b39efef84097aa33defc0815a1696617674072343144c83f6756f349e2b71afef11e69f46f614bc16

Score

10^/10

quasar venomrat evasion rat rootkit spyware stealer trojan

Malware Config

Signatures

Modifies Windows Defender Real-time Protection settings 3 TTPs
evasion trojan

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089
Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
VenomRAT
VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.
rat rootkit stealer venomrat

Executes dropped EXE 1 IoCs

Processes:

update.exe

pid	Process
1156	update.exe

Loads dropped DLL 1 IoCs

Processes:

cela.exe

pid	Process
1980	cela.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

cela.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features	cela.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	cela.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow	ioc
3	ip-api.com

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task

T1053

Processes:

schtasks.exeschtasks.exe

pid	Process
744	schtasks.exe
560	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid	Process
1660	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

cela.exepowershell.exeupdate.exe

description	pid	Process
Token: SeDebugPrivilege	1980	cela.exe
Token: SeDebugPrivilege	1660	powershell.exe
Token: SeDebugPrivilege	1156	update.exe
Token: SeDebugPrivilege	1156	update.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

cela.exeupdate.exe

description	pid	Process	procid_target
PID 1980 wrote to memory of 744	1980	cela.exe	30
PID 1980 wrote to memory of 744	1980	cela.exe	30
PID 1980 wrote to memory of 744	1980	cela.exe	30
PID 1980 wrote to memory of 744	1980	cela.exe	30
PID 1980 wrote to memory of 1156	1980	cela.exe	32
PID 1980 wrote to memory of 1156	1980	cela.exe	32
PID 1980 wrote to memory of 1156	1980	cela.exe	32
PID 1980 wrote to memory of 1156	1980	cela.exe	32
PID 1980 wrote to memory of 1156	1980	cela.exe	32
PID 1980 wrote to memory of 1156	1980	cela.exe	32
PID 1980 wrote to memory of 1156	1980	cela.exe	32
PID 1980 wrote to memory of 1660	1980	cela.exe	33
PID 1980 wrote to memory of 1660	1980	cela.exe	33
PID 1980 wrote to memory of 1660	1980	cela.exe	33
PID 1980 wrote to memory of 1660	1980	cela.exe	33
PID 1156 wrote to memory of 560	1156	update.exe	35
PID 1156 wrote to memory of 560	1156	update.exe	35
PID 1156 wrote to memory of 560	1156	update.exe	35
PID 1156 wrote to memory of 560	1156	update.exe	35
PID 1156 wrote to memory of 316	1156	update.exe	37
PID 1156 wrote to memory of 316	1156	update.exe	37
PID 1156 wrote to memory of 316	1156	update.exe	37
PID 1156 wrote to memory of 316	1156	update.exe	37

C:\Users\Admin\AppData\Local\Temp\cela.exe
"C:\Users\Admin\AppData\Local\Temp\cela.exe"
1⤵
- Loads dropped DLL
- Windows security modification
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1980
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\cela.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:744
- C:\Users\Admin\AppData\Roaming\SubDir\update.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\update.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1156
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\update.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:560
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\iKW2UZvqnijH.bat" "
    3⤵
    PID:316
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1660

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Modify Existing Service

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Disabling Security Tools

Modify Registry

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\update.exe

MD5
507c92e12c99eb53544aba006004b843

SHA1
11205b1e7e9317192994f5a9037d0f9924f29469

SHA256
3f50cb0f25bc9fdaa5c75865eaca04ed12f45d5419b6624f1cf0f507be3cdafe

SHA512
21b13fa6b070f3fecab15fe8c4124c4ec592b2886eff6a9b39efef84097aa33defc0815a1696617674072343144c83f6756f349e2b71afef11e69f46f614bc16

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\update.exe

MD5
507c92e12c99eb53544aba006004b843

SHA1
11205b1e7e9317192994f5a9037d0f9924f29469

SHA256
3f50cb0f25bc9fdaa5c75865eaca04ed12f45d5419b6624f1cf0f507be3cdafe

SHA512
21b13fa6b070f3fecab15fe8c4124c4ec592b2886eff6a9b39efef84097aa33defc0815a1696617674072343144c83f6756f349e2b71afef11e69f46f614bc16

Download Submit
\Users\Admin\AppData\Roaming\SubDir\update.exe

MD5
507c92e12c99eb53544aba006004b843

SHA1
11205b1e7e9317192994f5a9037d0f9924f29469

SHA256
3f50cb0f25bc9fdaa5c75865eaca04ed12f45d5419b6624f1cf0f507be3cdafe

SHA512
21b13fa6b070f3fecab15fe8c4124c4ec592b2886eff6a9b39efef84097aa33defc0815a1696617674072343144c83f6756f349e2b71afef11e69f46f614bc16

Download Submit
memory/316-19-0x0000000000000000-mapping.dmp

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memory/560-17-0x0000000000000000-mapping.dmp

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memory/744-5-0x0000000000000000-mapping.dmp

Download
memory/1156-12-0x00000000010A0000-0x00000000010A1000-memory.dmp

Filesize
4KB

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memory/1156-7-0x0000000000000000-mapping.dmp

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memory/1156-10-0x00000000743D0000-0x0000000074ABE000-memory.dmp

Filesize
6.9MB

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memory/1660-11-0x0000000000000000-mapping.dmp

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memory/1660-14-0x00000000743D0000-0x0000000074ABE000-memory.dmp

Filesize
6.9MB

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memory/1660-15-0x0000000000F80000-0x0000000000F81000-memory.dmp

Filesize
4KB

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memory/1660-16-0x0000000004940000-0x0000000004941000-memory.dmp

Filesize
4KB

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memory/1660-18-0x0000000001090000-0x0000000001091000-memory.dmp

Filesize
4KB

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memory/1980-2-0x00000000743D0000-0x0000000074ABE000-memory.dmp

Filesize
6.9MB

Download
memory/1980-3-0x0000000000C50000-0x0000000000C51000-memory.dmp

Filesize
4KB

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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