quasar | 7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7

Analysis

max time kernel
141s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20230621-en
resource tags

arch:x64arch:x86image:win10v2004-20230621-enlocale:en-usos:windows10-2004-x64system
submitted
30/06/2023, 12:19

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General

Target

Recrypted.exe
Size

2.9MB
MD5

68a23c2fc62bddad0a2c6cf36003577b
SHA1

67a19bf734520933adfa28afc017c3af1d6a3d5b
SHA256

7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7
SHA512

0386671ee83c0825f80a0c95b4e21eb23054878546aff5d8ef63a3bcc6a32c53a61397009aee8e8c5fc171b1ed0e9b69a31111eb1b860e1ff67264fcac806cef
SSDEEP

24576:plubLwtFDS7FYNYD7264xnRhc/LSXxH227hqRCeFcOziFJLUfdKTgWA22222222:gZ7h4xnRhcGXxHxOqdq1pup

Score

10^/10

quasar success persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

SUCCESS

41.185.97.216:4782

Mutex

MUTEX_QAxMFzrXWG2cbIHPGK

Attributes

encryption_key
4DwUV8AnxPgmXSMeThKb
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
cmd
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/1760-163-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4025927695-1301755775-2607443251-1000\Control Panel\International\Geo\Nation	Client.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4025927695-1301755775-2607443251-1000\Control Panel\International\Geo\Nation	Recrypted.exe

Executes dropped EXE 3 IoCs

pid	Process
3328	Client.exe
3040	Client.exe
1952	Client.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4025927695-1301755775-2607443251-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Omjvs = "\"C:\\Users\\Admin\\AppData\\Roaming\\Saizfrsak\\Omjvs.exe\""	Client.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4025927695-1301755775-2607443251-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Omjvs = "\"C:\\Users\\Admin\\AppData\\Roaming\\Saizfrsak\\Omjvs.exe\""	Recrypted.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.

flow	ioc
41	ip-api.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4284 set thread context of 1760	4284	Recrypted.exe	96
PID 3328 set thread context of 1952	3328	Client.exe	107

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

System Information Discovery
T1082

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

pid	Process
232	schtasks.exe
4680	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4272	powershell.exe
4272	powershell.exe
4284	Recrypted.exe
4284	Recrypted.exe
4284	Recrypted.exe
4284	Recrypted.exe
3108	powershell.exe
3108	powershell.exe
3328	Client.exe
3328	Client.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4272	powershell.exe
Token: SeDebugPrivilege	4284	Recrypted.exe
Token: SeDebugPrivilege	1760	Recrypted.exe
Token: SeDebugPrivilege	3108	powershell.exe
Token: SeDebugPrivilege	3328	Client.exe
Token: SeDebugPrivilege	1952	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1952	Client.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 4284 wrote to memory of 4272	4284	Recrypted.exe	84
PID 4284 wrote to memory of 4272	4284	Recrypted.exe	84
PID 4284 wrote to memory of 4272	4284	Recrypted.exe	84
PID 4284 wrote to memory of 380	4284	Recrypted.exe	94
PID 4284 wrote to memory of 380	4284	Recrypted.exe	94
PID 4284 wrote to memory of 380	4284	Recrypted.exe	94
PID 4284 wrote to memory of 2200	4284	Recrypted.exe	95
PID 4284 wrote to memory of 2200	4284	Recrypted.exe	95
PID 4284 wrote to memory of 2200	4284	Recrypted.exe	95
PID 4284 wrote to memory of 1760	4284	Recrypted.exe	96
PID 4284 wrote to memory of 1760	4284	Recrypted.exe	96
PID 4284 wrote to memory of 1760	4284	Recrypted.exe	96
PID 4284 wrote to memory of 1760	4284	Recrypted.exe	96
PID 4284 wrote to memory of 1760	4284	Recrypted.exe	96
PID 4284 wrote to memory of 1760	4284	Recrypted.exe	96
PID 4284 wrote to memory of 1760	4284	Recrypted.exe	96
PID 4284 wrote to memory of 1760	4284	Recrypted.exe	96
PID 1760 wrote to memory of 232	1760	Recrypted.exe	99
PID 1760 wrote to memory of 232	1760	Recrypted.exe	99
PID 1760 wrote to memory of 232	1760	Recrypted.exe	99
PID 1760 wrote to memory of 3328	1760	Recrypted.exe	101
PID 1760 wrote to memory of 3328	1760	Recrypted.exe	101
PID 1760 wrote to memory of 3328	1760	Recrypted.exe	101
PID 3328 wrote to memory of 3108	3328	Client.exe	102
PID 3328 wrote to memory of 3108	3328	Client.exe	102
PID 3328 wrote to memory of 3108	3328	Client.exe	102
PID 3328 wrote to memory of 3040	3328	Client.exe	106
PID 3328 wrote to memory of 3040	3328	Client.exe	106
PID 3328 wrote to memory of 3040	3328	Client.exe	106
PID 3328 wrote to memory of 1952	3328	Client.exe	107
PID 3328 wrote to memory of 1952	3328	Client.exe	107
PID 3328 wrote to memory of 1952	3328	Client.exe	107
PID 3328 wrote to memory of 1952	3328	Client.exe	107
PID 3328 wrote to memory of 1952	3328	Client.exe	107
PID 3328 wrote to memory of 1952	3328	Client.exe	107
PID 3328 wrote to memory of 1952	3328	Client.exe	107
PID 3328 wrote to memory of 1952	3328	Client.exe	107
PID 1952 wrote to memory of 4680	1952	Client.exe	108
PID 1952 wrote to memory of 4680	1952	Client.exe	108
PID 1952 wrote to memory of 4680	1952	Client.exe	108

C:\Users\Admin\AppData\Local\Temp\Recrypted.exe
"C:\Users\Admin\AppData\Local\Temp\Recrypted.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4284
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4272
- C:\Users\Admin\AppData\Local\Temp\Recrypted.exe
  C:\Users\Admin\AppData\Local\Temp\Recrypted.exe
  2⤵
  PID:380
- C:\Users\Admin\AppData\Local\Temp\Recrypted.exe
  C:\Users\Admin\AppData\Local\Temp\Recrypted.exe
  2⤵
  PID:2200
- C:\Users\Admin\AppData\Local\Temp\Recrypted.exe
  C:\Users\Admin\AppData\Local\Temp\Recrypted.exe
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1760
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "cmd" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Recrypted.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:232
- - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3328
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3108
  - - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      4⤵
      Executes dropped EXE
      PID:3040
  - - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:1952
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "cmd" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:4680

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Client.exe.log

Filesize
1KB

MD5
7e88081fcf716d85992bb3af3d9b6454

SHA1
2153780fbc71061b0102a7a7b665349e1013e250

SHA256
5ffb4a3ea94a6a53c4f88e2191c6fec5fd8a7336e367aa113fe8c12631e0c4d2

SHA512
ec606e14367ae221c04f213a61a6f797034495121198e4788e3afa4aa8db67bf59c5c5210a56afae5557158e8923b013b371b84c7d64303618c5b4c57a2224f7

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Recrypted.exe.log

Filesize
1KB

MD5
7e88081fcf716d85992bb3af3d9b6454

SHA1
2153780fbc71061b0102a7a7b665349e1013e250

SHA256
5ffb4a3ea94a6a53c4f88e2191c6fec5fd8a7336e367aa113fe8c12631e0c4d2

SHA512
ec606e14367ae221c04f213a61a6f797034495121198e4788e3afa4aa8db67bf59c5c5210a56afae5557158e8923b013b371b84c7d64303618c5b4c57a2224f7

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
1KB

MD5
4280e36a29fa31c01e4d8b2ba726a0d8

SHA1
c485c2c9ce0a99747b18d899b71dfa9a64dabe32

SHA256
e2486a1bdcba80dad6dd6210d7374bd70ae196a523c06ceda71370fd3ea78359

SHA512
494fe5f0ade03669e5830bed93c964d69b86629440148d7b0881cf53203fd89443ebff9b4d1ee9d96244f62af6edede622d9eacba37f80f389a0d522e4ad4ea4

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache

Filesize
53KB

MD5
06ad34f9739c5159b4d92d702545bd49

SHA1
9152a0d4f153f3f40f7e606be75f81b582ee0c17

SHA256
474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba

SHA512
c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
16KB

MD5
2d0d737dc03e2a2b26219569fb49c760

SHA1
bd7ef512d50cfb6fb4beba79bf8a8a0f5d4f3d79

SHA256
3541b3b83fbb7865106d67396081f368a1e7862a03b566d5ba0d83f10fbcefcd

SHA512
0f9899813e9d4f43f8a00128e25156c6167a3449c3273a90bfad230aabb1842c7bfca6466f40f67bf673e6e8e82bfb678cf5dfe5090535f153154720fc863858

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_nkqjy555.rp2.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
2.9MB

MD5
68a23c2fc62bddad0a2c6cf36003577b

SHA1
67a19bf734520933adfa28afc017c3af1d6a3d5b

SHA256
7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7

SHA512
0386671ee83c0825f80a0c95b4e21eb23054878546aff5d8ef63a3bcc6a32c53a61397009aee8e8c5fc171b1ed0e9b69a31111eb1b860e1ff67264fcac806cef

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

Filesize
2.9MB

MD5
68a23c2fc62bddad0a2c6cf36003577b

SHA1
67a19bf734520933adfa28afc017c3af1d6a3d5b

SHA256
7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7

SHA512
0386671ee83c0825f80a0c95b4e21eb23054878546aff5d8ef63a3bcc6a32c53a61397009aee8e8c5fc171b1ed0e9b69a31111eb1b860e1ff67264fcac806cef

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

Filesize
2.9MB

MD5
68a23c2fc62bddad0a2c6cf36003577b

SHA1
67a19bf734520933adfa28afc017c3af1d6a3d5b

SHA256
7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7

SHA512
0386671ee83c0825f80a0c95b4e21eb23054878546aff5d8ef63a3bcc6a32c53a61397009aee8e8c5fc171b1ed0e9b69a31111eb1b860e1ff67264fcac806cef

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

Filesize
2.9MB

MD5
68a23c2fc62bddad0a2c6cf36003577b

SHA1
67a19bf734520933adfa28afc017c3af1d6a3d5b

SHA256
7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7

SHA512
0386671ee83c0825f80a0c95b4e21eb23054878546aff5d8ef63a3bcc6a32c53a61397009aee8e8c5fc171b1ed0e9b69a31111eb1b860e1ff67264fcac806cef

Download Submit
memory/1760-166-0x0000000005DA0000-0x0000000006344000-memory.dmp

Filesize
5.6MB

Download
memory/1760-167-0x00000000056F0000-0x0000000005782000-memory.dmp

Filesize
584KB

Download
memory/1760-170-0x0000000006990000-0x00000000069CC000-memory.dmp

Filesize
240KB

Download
memory/1760-169-0x0000000005D50000-0x0000000005D62000-memory.dmp

Filesize
72KB

Download
memory/1760-168-0x0000000002F70000-0x0000000002F80000-memory.dmp

Filesize
64KB

Download
memory/1760-163-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1952-200-0x00000000050F0000-0x0000000005100000-memory.dmp

Filesize
64KB

Download
memory/1952-202-0x0000000006B30000-0x0000000006B3A000-memory.dmp

Filesize
40KB

Download
memory/1952-203-0x00000000050F0000-0x0000000005100000-memory.dmp

Filesize
64KB

Download
memory/3108-190-0x00000000049F0000-0x0000000004A00000-memory.dmp

Filesize
64KB

Download
memory/3108-191-0x00000000049F0000-0x0000000004A00000-memory.dmp

Filesize
64KB

Download
memory/3108-188-0x00000000049F0000-0x0000000004A00000-memory.dmp

Filesize
64KB

Download
memory/3328-189-0x0000000002780000-0x0000000002790000-memory.dmp

Filesize
64KB

Download
memory/3328-175-0x0000000002780000-0x0000000002790000-memory.dmp

Filesize
64KB

Download
memory/4272-152-0x00000000075B0000-0x0000000007C2A000-memory.dmp

Filesize
6.5MB

Download
memory/4272-157-0x0000000004E20000-0x0000000004E30000-memory.dmp

Filesize
64KB

Download
memory/4272-151-0x0000000005F20000-0x0000000005F3E000-memory.dmp

Filesize
120KB

Download
memory/4272-140-0x0000000004F10000-0x0000000004F76000-memory.dmp

Filesize
408KB

Download
memory/4272-139-0x0000000004E20000-0x0000000004E30000-memory.dmp

Filesize
64KB

Download
memory/4272-138-0x0000000004E20000-0x0000000004E30000-memory.dmp

Filesize
64KB

Download
memory/4272-154-0x0000000004E20000-0x0000000004E30000-memory.dmp

Filesize
64KB

Download
memory/4272-153-0x0000000006400000-0x000000000641A000-memory.dmp

Filesize
104KB

Download
memory/4272-158-0x0000000004E20000-0x0000000004E30000-memory.dmp

Filesize
64KB

Download
memory/4272-141-0x00000000051B0000-0x0000000005216000-memory.dmp

Filesize
408KB

Download
memory/4272-137-0x0000000005460000-0x0000000005A88000-memory.dmp

Filesize
6.2MB

Download
memory/4272-136-0x0000000000E20000-0x0000000000E56000-memory.dmp

Filesize
216KB

Download
memory/4272-156-0x0000000004E20000-0x0000000004E30000-memory.dmp

Filesize
64KB

Download
memory/4284-134-0x0000000004E70000-0x0000000004E80000-memory.dmp

Filesize
64KB

Download
memory/4284-135-0x0000000004F10000-0x0000000004F32000-memory.dmp

Filesize
136KB

Download
memory/4284-155-0x0000000004E70000-0x0000000004E80000-memory.dmp

Filesize
64KB

Download
memory/4284-133-0x0000000000210000-0x00000000004FA000-memory.dmp

Filesize
2.9MB

Download