quasar | 6406cf5b9e7e6cbddf902322bd13c02f01b6a3335fbf53d839e740469ed9fc9e

Analysis

max time kernel
142s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
30/04/2024, 03:42

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General

Target
Venom.exe
Size 3.2MB
Sample240430-d9a8eaca6v
SHA256 6406cf5b9e7e6cbddf902322bd13c02f01b6a3335fbf53d839e740469ed9fc9e
MD5 6f1434bdc116473171a42f081f86d2e5
SHA1 68dc8a913caaddbcd9dd976f478cba38935d1681
SHA512 f7593f9d5033e816eb00eebd987a261b307443cb534763ab73c25ff640454aed06fb8651eb7a3c9a2b6750ed03891590cfa024425f948e2e87cb9950590fd70e
SSDEEP 98304:ahfos5HeMop9TM2EmSgFUMwCY7BtAFBsABH3:cfHHeMop9TM2ceUXN77Ksi3
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

93.123.85.108:4782

Mutex

e14b8f59-979b-4ebf-8602-dd3c4d6c301e

Attributes

encryption_key
534734397C0FA9A1D28F061AD75DF4100BFF5787
install_name
Msconfig.exe
log_directory
Logs
reconnect_delay
3000
startup_key
msconfig.exe
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/1184-7-0x0000000001370000-0x0000000001694000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4940	Msconfig.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\SubDir\Msconfig.exe	vbc.exe
File opened for modification	C:\Windows\SysWOW64\SubDir\Msconfig.exe	vbc.exe
File opened for modification	C:\Windows\SysWOW64\SubDir	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 628 set thread context of 1184	628	Venom.exe	99

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/Job

T1053

pid	Process
2408	schtasks.exe
1724	schtasks.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
628	Venom.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1184	vbc.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 628 wrote to memory of 1184	628	Venom.exe	99
PID 628 wrote to memory of 1184	628	Venom.exe	99
PID 628 wrote to memory of 1184	628	Venom.exe	99
PID 628 wrote to memory of 1184	628	Venom.exe	99
PID 628 wrote to memory of 1184	628	Venom.exe	99
PID 628 wrote to memory of 1184	628	Venom.exe	99
PID 628 wrote to memory of 1184	628	Venom.exe	99
PID 628 wrote to memory of 1184	628	Venom.exe	99
PID 628 wrote to memory of 2908	628	Venom.exe	100
PID 628 wrote to memory of 2908	628	Venom.exe	100
PID 628 wrote to memory of 2908	628	Venom.exe	100
PID 628 wrote to memory of 2388	628	Venom.exe	102
PID 628 wrote to memory of 2388	628	Venom.exe	102
PID 628 wrote to memory of 2388	628	Venom.exe	102
PID 2388 wrote to memory of 2408	2388	cmd.exe	104
PID 2388 wrote to memory of 2408	2388	cmd.exe	104
PID 2388 wrote to memory of 2408	2388	cmd.exe	104
PID 628 wrote to memory of 2320	628	Venom.exe	105
PID 628 wrote to memory of 2320	628	Venom.exe	105
PID 628 wrote to memory of 2320	628	Venom.exe	105
PID 1184 wrote to memory of 1724	1184	vbc.exe	107
PID 1184 wrote to memory of 1724	1184	vbc.exe	107
PID 1184 wrote to memory of 1724	1184	vbc.exe	107
PID 1184 wrote to memory of 4940	1184	vbc.exe	109
PID 1184 wrote to memory of 4940	1184	vbc.exe	109
PID 1184 wrote to memory of 4940	1184	vbc.exe	109

C:\Users\Admin\AppData\Local\Temp\Venom.exe
"C:\Users\Admin\AppData\Local\Temp\Venom.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:628
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1184
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "msconfig.exe" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Msconfig.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1724
- - C:\Windows\SysWOW64\SubDir\Msconfig.exe
    "C:\Windows\system32\SubDir\Msconfig.exe"
    3⤵
    - Executes dropped EXE
    PID:4940
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Roaming\MicrosoftTools"
  2⤵
  PID:2908
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\MicrosoftTools\MicrosoftTools.exe'" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2388
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\MicrosoftTools\MicrosoftTools.exe'" /f
    3⤵
    - Creates scheduled task(s)
    PID:2408
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C copy "C:\Users\Admin\AppData\Local\Temp\Venom.exe" "C:\Users\Admin\AppData\Roaming\MicrosoftTools\MicrosoftTools.exe"
  2⤵
  PID:2320

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3972 --field-trial-handle=2248,i,10247514684337323751,15511974759131734137,262144 --variations-seed-version /prefetch:8
1⤵
PID:312

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scripting

T1064

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Scripting

T1064

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Msconfig.exe

Path C:\Windows\SysWOW64\SubDir\Msconfig.exe
Size 2.5MB
SHA256 c16336ab32195b08c1678220fbe0256fee865f623e2b32fcfa4d9825fd68977e
MD5 0a7608db01cae07792cea95e792aa866
SHA1 71dff876e4d5edb6cea78fee7aa15845d4950e24
SHA512 990a6fa1b8adb6727b1dcd8931ad84fdcb556533b78f896a71eae2a7e3ae3222e4b8efaa4b629ced2841211750e0d8a75ddd546a983c2e586918dd8ba4e0dc42
SSDEEP 49152:S6F5PsH1IaspqACp//9NqqAJN77F29ZJOx2uc:jw16psLqqAJN77F29jOx27
MD5 SHA1 SHA512 SSDEEP

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memory/628-11-0x0000000074E40000-0x00000000755F0000-memory.dmp

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memory/628-1-0x0000000000130000-0x0000000000460000-memory.dmp

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memory/628-2-0x0000000004EB0000-0x0000000004EC0000-memory.dmp

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memory/628-3-0x0000000005470000-0x0000000005A14000-memory.dmp

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memory/628-4-0x0000000074E40000-0x00000000755F0000-memory.dmp

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memory/628-5-0x0000000004EB0000-0x0000000004EC0000-memory.dmp

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memory/628-0-0x0000000074E40000-0x00000000755F0000-memory.dmp

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memory/1184-6-0x0000000074E40000-0x00000000755F0000-memory.dmp

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memory/1184-9-0x0000000005D00000-0x0000000005D10000-memory.dmp

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memory/1184-8-0x0000000005C60000-0x0000000005CF2000-memory.dmp

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memory/1184-12-0x0000000005BE0000-0x0000000005BEA000-memory.dmp

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memory/1184-7-0x0000000001370000-0x0000000001694000-memory.dmp

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memory/1184-19-0x0000000074E40000-0x00000000755F0000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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