quasar | 93c17b482bf0bf274580744e57b27c70ffbbe1d14bb0c312e66f62e99ffa7c60

Analysis

max time kernel
134s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20/12/2024, 04:34

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General

Target

slimo-qt-windows/slimo-qt.exe
Size

101.4MB
MD5

8fe43b09d853202c4ff8f7d66d17adc5
SHA1

58b1d97d18c60a0769e66e4fcd1fb9756071a15c
SHA256

2b6b5c04c584c7d6dc72a5be6101c204d934b6502e28d1ed1514f757daaab50f
SHA512

1101f11a2c39c5a35fd1421c36b31ab20d21557e2eafe1085ef2f4c0a8df71404e6acb6adab551cce5fd68205e142644d8653be9b90248fb3f020422be240134
SSDEEP

393216:C4TPZVLWruiFVks+9j54GXvitZQLCO5SXDqQu58EISEhoIaE2FShABZDv25PPa2K:CKRVQxhu0P8Lq1LEvxOOx5S4

Score

10^/10

quasar slimo defense_evasion execution spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Slimo

51.15.17.193:4782

Mutex

e318fab0-811e-40a6-b0aa-1e21015956c8

Attributes

encryption_key
97599F6E5D14A784CC4DD36B18A277119042FDA8
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral4/memory/1928-39-0x000001DA190E0000-0x000001DA19404000-memory.dmp	family_quasar

System Binary Proxy Execution: Regsvcs/Regasm 1 TTPs 2 IoCs

Abuse Regasm to proxy execution of malicious code.

defense_evasion

Regsvcs/Regasm

T1218.009

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\Temp\RegAsm.exe	slimo-qt.exe
Key opened	\Registry\Machine\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Custom\RegAsm.exe	cmd.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tempup.url	slimo-qt.exe

Executes dropped EXE 1 IoCs

pid	Process
1928	RegAsm.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2348	powershell.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2348	powershell.exe
2348	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2348	powershell.exe
Token: SeDebugPrivilege	1928	RegAsm.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4156 wrote to memory of 4108	4156	slimo-qt.exe	85
PID 4156 wrote to memory of 4108	4156	slimo-qt.exe	85
PID 4108 wrote to memory of 4792	4108	cmd.exe	86
PID 4108 wrote to memory of 4792	4108	cmd.exe	86
PID 4108 wrote to memory of 2348	4108	cmd.exe	87
PID 4108 wrote to memory of 2348	4108	cmd.exe	87
PID 2348 wrote to memory of 2440	2348	powershell.exe	88
PID 2348 wrote to memory of 2440	2348	powershell.exe	88
PID 2440 wrote to memory of 2588	2440	csc.exe	89
PID 2440 wrote to memory of 2588	2440	csc.exe	89
PID 4156 wrote to memory of 2196	4156	slimo-qt.exe	90
PID 4156 wrote to memory of 2196	4156	slimo-qt.exe	90
PID 2196 wrote to memory of 1928	2196	cmd.exe	91
PID 2196 wrote to memory of 1928	2196	cmd.exe	91
PID 4156 wrote to memory of 4172	4156	slimo-qt.exe	93
PID 4156 wrote to memory of 4172	4156	slimo-qt.exe	93

C:\Users\Admin\AppData\Local\Temp\slimo-qt-windows\slimo-qt.exe
"C:\Users\Admin\AppData\Local\Temp\slimo-qt-windows\slimo-qt.exe"
1⤵
- System Binary Proxy Execution: Regsvcs/Regasm
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:4156
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /d /s /c "type C:\Users\Admin\AppData\Local\Temp\temp.ps1 | powershell.exe -noprofile -"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4108
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" type C:\Users\Admin\AppData\Local\Temp\temp.ps1 "
    3⤵
    PID:4792
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -noprofile -
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2348
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\3ksczjpw\3ksczjpw.cmdline"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2440
    - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
        
        C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESE687.tmp" "c:\Users\Admin\AppData\Local\Temp\3ksczjpw\CSC758C03F3821446D3B767F0A6F5DD774C.TMP"
        5⤵
        
        PID:2588
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /d /s /c "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
  2⤵
  - System Binary Proxy Execution: Regsvcs/Regasm
  - Suspicious use of WriteProcessMemory
  PID:2196
- - C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
    C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1928
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /d /s /c "C:\Users\Admin\AppData\Local\Temp\Slimo.exe"
  2⤵
  PID:4172

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

System Binary Proxy Execution

T1218

Regsvcs/Regasm

T1218.009

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\3ksczjpw\3ksczjpw.dll

Filesize
3KB

MD5
291c9f33cfcfc95d15913a1764d92edf

SHA1
4e705ae6861eac1bdbe80a92f23b34a0f9082d29

SHA256
34a47db049290aa103c82af39e639854df89dccc6b47bd7617dd8ebf89a65d1f

SHA512
dbd30813ca70e198a8419257cf3684d3daed4e34160e72453f7bd5d055ef8af73f5efb2dd6da07d7a773ed9d42f86e6419c133f88937c0fd84ee50621fc4e5ee

Download Submit
C:\Users\Admin\AppData\Local\Temp\RESE687.tmp

Filesize
1KB

MD5
93e9955cab8e26c22adcfc1558f5b3be

SHA1
35a64f70712ae9520b9e64a36383832709262912

SHA256
68723f0e18c502aeb2d0b330f4dd312fa65ad05bb2dc023e854d0a0332d11ee6

SHA512
fa0cde5d61387a92eba7445997912d15cf0d13d77410e2eedb23809fbdeab21fbecfb87c48553f73995f646b5f59ac2cb923aee4e19dccc26bebfa5c6e198199

Download Submit
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe

Filesize
8.2MB

MD5
ab0d88d920d75c9de43ccbdd901c8a53

SHA1
638197f5a23428f1c15a0a5473b6558d263b0a0c

SHA256
edb3d030a4a033bae41057c19437dff31c171573b65afab0acd433cbd0572a17

SHA512
25e1f1f5afe0cb1920be2d6a1db59f11b9f34b0bd154d3d553eb0dc44ecbc810463a7e1dcca5a176d7a08f0a34ed3e669a56cd35f9cc5ed796bfa5385f0e15f7

Download Submit
C:\Users\Admin\AppData\Local\Temp\Slimo.exe

Filesize
2KB

MD5
e53fdf76753edcd8773ab17ae968bfd6

SHA1
4bea38cd83442080bdf51cd1db206715f9198955

SHA256
3d70ce95eb1eb78620cc57fe1a6a479e6f2d70508bf813238e573863df000d6e

SHA512
f168878f0d1047ce3775a511ee5cffed3afc7a47081304b4c884b6099dace99a17e473b727f5afcc87b0e0c1df461439f821b2dbcf341f94b9c206e8487c7888

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_oxiffbex.xvn.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\temp.ps1

Filesize
379B

MD5
18047e197c6820559730d01035b2955a

SHA1
277179be54bba04c0863aebd496f53b129d47464

SHA256
348342fd00e113a58641b2c35dd6a8f2c1fb2f1b16d8dff9f77b05f29e229ef3

SHA512
1942acd6353310623561efb33d644ba45ab62c1ddfabb1a1b3b1dd93f7d03df0884e2f2fc927676dc3cd3b563d159e3043d2eff81708c556431be9baf4ccb877

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\3ksczjpw\3ksczjpw.0.cs

Filesize
311B

MD5
7bc8de6ac8041186ed68c07205656943

SHA1
673f31957ab1b6ad3dc769e86aedc7ed4b4e0a75

SHA256
36865e3bca9857e07b1137ada07318b9caaef9608256a6a6a7fd426ee03e1697

SHA512
0495839c79597e81d447672f8e85b03d0401f81c7b2011a830874c33812c54dab25b0f89a202bbb71abb4ffc7cb2c07cc37c008b132d4d5d796aebdd12741dba

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\3ksczjpw\3ksczjpw.cmdline

Filesize
369B

MD5
e88e5ff6dd19a04b00e5f312aa0b39d5

SHA1
9df36feb2901394ae0d769ccec149b04eaa258cb

SHA256
746c69b63365c2966bdaadc8a41d30c3c94d62f2ec514d9f708173058fc124d2

SHA512
eb817199ed9e39deff04cde30c0b4e70f2a91150c14f2a000f4444ef8f3dd75e893cd9db1e95114be4000d2aadbe63c60cf7327c046810a13b693ff58149059e

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\3ksczjpw\CSC758C03F3821446D3B767F0A6F5DD774C.TMP

Filesize
652B

MD5
1929b417000ec7b6ed716629b6e902bd

SHA1
d966af46a63b89d5ea35242376f3625c61403380

SHA256
bd3e4a13dc8f98df5480af3c3051d97ebb01ce5eed28430626167be72c3168e6

SHA512
46d2a5120eeb4df9cbfdbbb8f2711ee4f026119dd9f7e89a40e4f99a22f8f5e6b0c2e8d811c5defdb4900d2b277b5d1fbaa3007489172a45cd164089b09b6c76

Download Submit
memory/1928-39-0x000001DA190E0000-0x000001DA19404000-memory.dmp

Filesize
3.1MB

Download
memory/1928-40-0x000001DA80010000-0x000001DA80060000-memory.dmp

Filesize
320KB

Download
memory/1928-41-0x000001DA80120000-0x000001DA801D2000-memory.dmp

Filesize
712KB

Download
memory/1928-44-0x000001DA7FFE0000-0x000001DA7FFF2000-memory.dmp

Filesize
72KB

Download
memory/1928-45-0x000001DA800A0000-0x000001DA800DC000-memory.dmp

Filesize
240KB

Download
memory/2348-27-0x000001C41D900000-0x000001C41D908000-memory.dmp

Filesize
32KB

Download
memory/2348-12-0x000001C41FB30000-0x000001C41FB52000-memory.dmp

Filesize
136KB

Download
memory/2348-13-0x000001C41FBB0000-0x000001C41FBF4000-memory.dmp

Filesize
272KB

Download
memory/2348-14-0x000001C420010000-0x000001C420086000-memory.dmp

Filesize
472KB

Download