quasar | 93c17b482bf0bf274580744e57b27c70ffbbe1d14bb0c312e66f62e99ffa7c60

Analysis

max time kernel
96s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19-12-2024 11:37

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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/428-39-0x0000022863530000-0x0000022863854000-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
428	RegAsm.exe

Looks up external IP address via web service 2 IoCs

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

flow	ioc
21	api.ipify.org
23	api.ipify.org

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3672	powershell.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3672	powershell.exe
3672	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3672	powershell.exe
Token: SeDebugPrivilege	428	RegAsm.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2572 wrote to memory of 2844	2572	slimo-qt.exe	85
PID 2572 wrote to memory of 2844	2572	slimo-qt.exe	85
PID 2844 wrote to memory of 3516	2844	cmd.exe	86
PID 2844 wrote to memory of 3516	2844	cmd.exe	86
PID 2844 wrote to memory of 3672	2844	cmd.exe	87
PID 2844 wrote to memory of 3672	2844	cmd.exe	87
PID 3672 wrote to memory of 208	3672	powershell.exe	88
PID 3672 wrote to memory of 208	3672	powershell.exe	88
PID 208 wrote to memory of 4900	208	csc.exe	89
PID 208 wrote to memory of 4900	208	csc.exe	89
PID 2572 wrote to memory of 4848	2572	slimo-qt.exe	90
PID 2572 wrote to memory of 4848	2572	slimo-qt.exe	90
PID 4848 wrote to memory of 428	4848	cmd.exe	91
PID 4848 wrote to memory of 428	4848	cmd.exe	91
PID 2572 wrote to memory of 4968	2572	slimo-qt.exe	93
PID 2572 wrote to memory of 4968	2572	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:2572
- 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:2844
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" type C:\Users\Admin\AppData\Local\Temp\temp.ps1 "
    3⤵
    PID:3516
- - 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:3672
  - - 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\4ruvrayp\4ruvrayp.cmdline"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:208
    - - 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\RESEC83.tmp" "c:\Users\Admin\AppData\Local\Temp\4ruvrayp\CSCD9FA5D38A64F4F31A47D8DB96FA94F0.TMP"
        5⤵
        
        PID:4900
- 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:4848
- - 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:428
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /d /s /c "C:\Users\Admin\AppData\Local\Temp\Slimo.exe"
  2⤵
  PID:4968

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\4ruvrayp\4ruvrayp.dll

Filesize
3KB

MD5
c929ccb8345d70de0350fa772ebf7e87

SHA1
cfd149e6083a495ea3ecddfddd39f942c5d0ee6b

SHA256
35af361a797c7cac843c46d34fbe1dc53f6d3867cdfd01ce5f4ed25f85830b5f

SHA512
8718aacc3b6856f646e393d1a167876330e2ef75cce996e925b2a490fae554ca49c6d624a39a49510a873b078639144aaaf013a9c90d8c7743724ab17af79215

Download Submit
C:\Users\Admin\AppData\Local\Temp\RESEC83.tmp

Filesize
1KB

MD5
57a8ee87c9632a9b90faace6298a7055

SHA1
ebc95be126e596c68d0ea3d7dbeb601946b135ac

SHA256
aaa7a0a9dc64cd86766e76b196e35c3be54384b2a702cb865abdd4063ccfa0af

SHA512
128af7e9262a2401124db9978b40629ac4393c035036e722dbc85729929367be2bb16bf3c5a80a5df3960dcc84af17a178f0c6beef397039cbb69505eed0ee47

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_ypl1r04y.plk.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\4ruvrayp\4ruvrayp.0.cs

Filesize
311B

MD5
7bc8de6ac8041186ed68c07205656943

SHA1
673f31957ab1b6ad3dc769e86aedc7ed4b4e0a75

SHA256
36865e3bca9857e07b1137ada07318b9caaef9608256a6a6a7fd426ee03e1697

SHA512
0495839c79597e81d447672f8e85b03d0401f81c7b2011a830874c33812c54dab25b0f89a202bbb71abb4ffc7cb2c07cc37c008b132d4d5d796aebdd12741dba

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\4ruvrayp\4ruvrayp.cmdline

Filesize
369B

MD5
bf774778abc70f7942ecbe70234f1dc4

SHA1
1de4669fc920d3a68bac3675ef8ba55360dc4359

SHA256
cce33dea55104916f11081d6474dcc1fad12f1688c8b5582fd3e5ed847f32050

SHA512
46a85a6734191630dc1cb74474a57a4b68024a7179073bfbcbc4789d54d2a402f2e6a5bedcd7253fbe97c55d383d47046846f248c89a22ad3961e840ac5c11cd

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\4ruvrayp\CSCD9FA5D38A64F4F31A47D8DB96FA94F0.TMP

Filesize
652B

MD5
1adb373a33d65917a18ef472f4589fc6

SHA1
6f37c6f1685a96b974bb21786f56d641f470002d

SHA256
1c2e7094cc04ec4b6791d4c0104bc03ee67ca5010d45688eea726d8884f42945

SHA512
6cdb1e26f32c11ac56540df7a11944583a33015b01a1337d88bac10e5952ff2ec246299c63e6d4e3f782cc50c91bb15c93dd33e173ed8254b5a6b0a88d8b0d1c

Download Submit
memory/428-39-0x0000022863530000-0x0000022863854000-memory.dmp

Filesize
3.1MB

Download
memory/428-40-0x0000022863DE0000-0x0000022863E30000-memory.dmp

Filesize
320KB

Download
memory/428-41-0x0000022863EF0000-0x0000022863FA2000-memory.dmp

Filesize
712KB

Download
memory/3672-14-0x000002B6C5FD0000-0x000002B6C6046000-memory.dmp

Filesize
472KB

Download
memory/3672-13-0x000002B6C5F00000-0x000002B6C5F44000-memory.dmp

Filesize
272KB

Download
memory/3672-27-0x000002B6AB8A0000-0x000002B6AB8A8000-memory.dmp

Filesize
32KB

Download
memory/3672-3-0x000002B6AB370000-0x000002B6AB392000-memory.dmp

Filesize
136KB

Download