quasar | abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03

General

Target

abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03.exe
Size

15KB
MD5

27275853bd5996fb2f3767772d068d56
SHA1

14fb4c3c74870f14af8c4cd7c8eafa81c99c70c2
SHA256

abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03
SHA512

7e05ec050eaea236c04d74042ac1b2d5634e2be0dd3b8807bada25c38f2f758de9cc25d69fcfd5086b949dc74b97ad2401bce9e6db541153cec60e33024cc887
SSDEEP

384:twpcZrxSdohsUVdko8bxjsCa2txgb6P/sxErmM8/ANWUh:mpSk8VOfb2M669Sct

Score

10^/10

quasar office04 execution spyware stealer trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

31.177.108.29:4782

Mutex

553dcf2c-4c70-4c0c-935a-2e078a46f03e

Attributes

encryption_key
DAFF70D249B4EC619D5A052FDD3418E3549FF268
install_name
KR6nDu9fLhop1bFe.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Defender.Process
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/812-30-0x0000000000430000-0x0000000000754000-memory.dmp	family_quasar

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs
Using powershell.exe command.
execution

PowerShell
T1059.001

Processes:

powershell.exepowershell.exe

pid process

4640 powershell.exe
1972 powershell.exe
Downloads MZ/PE file

pid	process
4640	powershell.exe
1972	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03.exe

Executes dropped EXE 3 IoCs

Processes:

oom9OtwJwxqO4Fkx.exeKR6nDu9fLhop1bFe.exeEtlSaIvPinAH61DV.exe

pid process

812 oom9OtwJwxqO4Fkx.exe
3492 KR6nDu9fLhop1bFe.exe
3048 EtlSaIvPinAH61DV.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

1 api.ipify.org
2 api.ipify.org
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/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

920 schtasks.exe
4420 schtasks.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exepowershell.exe

pid process

1972 powershell.exe
1972 powershell.exe
4640 powershell.exe
4640 powershell.exe

pid	process
812	oom9OtwJwxqO4Fkx.exe
3492	KR6nDu9fLhop1bFe.exe
3048	EtlSaIvPinAH61DV.exe

flow	ioc
1	api.ipify.org
2	api.ipify.org

pid	process
920	schtasks.exe
4420	schtasks.exe

pid	process
1972	powershell.exe
1972	powershell.exe
4640	powershell.exe
4640	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03.exepowershell.exeoom9OtwJwxqO4Fkx.exeKR6nDu9fLhop1bFe.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	2020	abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03.exe
Token: SeDebugPrivilege	1972	powershell.exe
Token: SeDebugPrivilege	812	oom9OtwJwxqO4Fkx.exe
Token: SeDebugPrivilege	3492	KR6nDu9fLhop1bFe.exe
Token: SeDebugPrivilege	4640	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

KR6nDu9fLhop1bFe.exe

pid process

3492 KR6nDu9fLhop1bFe.exe

pid	process
3492	KR6nDu9fLhop1bFe.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03.exeoom9OtwJwxqO4Fkx.exeKR6nDu9fLhop1bFe.exeEtlSaIvPinAH61DV.exe

description	pid	process	target process
PID 2020 wrote to memory of 1972	2020	abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03.exe	powershell.exe
PID 2020 wrote to memory of 1972	2020	abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03.exe	powershell.exe
PID 2020 wrote to memory of 812	2020	abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03.exe	oom9OtwJwxqO4Fkx.exe
PID 2020 wrote to memory of 812	2020	abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03.exe	oom9OtwJwxqO4Fkx.exe
PID 812 wrote to memory of 920	812	oom9OtwJwxqO4Fkx.exe	schtasks.exe
PID 812 wrote to memory of 920	812	oom9OtwJwxqO4Fkx.exe	schtasks.exe
PID 812 wrote to memory of 3492	812	oom9OtwJwxqO4Fkx.exe	KR6nDu9fLhop1bFe.exe
PID 812 wrote to memory of 3492	812	oom9OtwJwxqO4Fkx.exe	KR6nDu9fLhop1bFe.exe
PID 3492 wrote to memory of 4420	3492	KR6nDu9fLhop1bFe.exe	schtasks.exe
PID 3492 wrote to memory of 4420	3492	KR6nDu9fLhop1bFe.exe	schtasks.exe
PID 2020 wrote to memory of 3048	2020	abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03.exe	EtlSaIvPinAH61DV.exe
PID 2020 wrote to memory of 3048	2020	abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03.exe	EtlSaIvPinAH61DV.exe
PID 3048 wrote to memory of 4640	3048	EtlSaIvPinAH61DV.exe	powershell.exe
PID 3048 wrote to memory of 4640	3048	EtlSaIvPinAH61DV.exe	powershell.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03.exe
"C:\Users\Admin\AppData\Local\Temp\abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2020
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\SubDir'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1972
- C:\Users\Admin\AppData\Roaming\SubDir\oom9OtwJwxqO4Fkx.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\oom9OtwJwxqO4Fkx.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:812
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Defender.Process" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:920
- - C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3492
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Defender.Process" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:4420
- C:\Users\Admin\AppData\Roaming\SubDir\EtlSaIvPinAH61DV.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\EtlSaIvPinAH61DV.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:3048
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" -NoProfile -NonInteractive -NoLogo -Command "[Console]::OutputEncoding = [System.Text.Encoding]::UTF8; Get-Culture | Select -ExpandProperty DisplayName"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4640

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

Scheduled Task/Job

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\Temp\E98lMjIcF7wYmXZKncgfDriN5J4T34\screen1.png

Filesize
480KB

MD5
1fe419c45c42f40fc68376728a1a8394

SHA1
140c5433b1a875efd7edf2917509a123ddb80fb0

SHA256
c876f674a54137056fdd404b716490fa35fde9c89008f6692891158afcd358ba

SHA512
02140be0a6f41caf172a179ae09e14a55ec0e01c051874ea40f8aff3103a3568a3c078fd4f68a2d1d95b99c8807bc00d3dccc1cd1405d6f7eb236f42d9a71692

Download Submit
C:\Users\Admin\AppData\Local\Temp\E98lMjIcF7wYmXZKncgfDriN5J4T34\sensitive-files.zip

Filesize
3.6MB

MD5
23bafb47c830770869d0ed0e654a8a8e

SHA1
283c5c8af3a12ca169643a9b3a8ea3f7771cbbd5

SHA256
667dd97791a8660bfcc8b84556b12ea29fdac6715febb527e8abcd8b4ccfc41b

SHA512
e2d7904454d8fc9eae66f9636ebb0b1da025d1c439039b360f380b24a9163cd40b11953ee57800b412f6ff998855a56be5ff9fc223d29bc8127a7c9dca2c277a

Download Submit
C:\Users\Admin\AppData\Local\Temp\E98lMjIcF7wYmXZKncgfDriN5J4T34\user_info.txt

Filesize
733B

MD5
c6ff5a4b928f318b94eeaafe687fcde4

SHA1
c03106879b65ef181e24c74e8bfe245dd01cdf56

SHA256
540d416f4b26e2eb05c38d4f48c084df6ff8c0e6a71d5c2039237b94c8c1b912

SHA512
497aa2f998fdf807db6ec48562a00355ce72e0d188836d72328cefca5c30b922c9f010ed5fe4fd3cac98377163f1da4cbe15938d499d16070b46cc42bf9356f7

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1vdd5rla.rea.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/812-30-0x0000000000430000-0x0000000000754000-memory.dmp

Filesize
3.1MB

Download
memory/1972-3-0x00007FFA85650000-0x00007FFA86111000-memory.dmp

Filesize
10.8MB

Download
memory/1972-4-0x00007FFA85650000-0x00007FFA86111000-memory.dmp

Filesize
10.8MB

Download
memory/1972-14-0x000001E9FF4A0000-0x000001E9FF4C2000-memory.dmp

Filesize
136KB

Download
memory/1972-15-0x00007FFA85650000-0x00007FFA86111000-memory.dmp

Filesize
10.8MB

Download
memory/1972-18-0x00007FFA85650000-0x00007FFA86111000-memory.dmp

Filesize
10.8MB

Download
memory/2020-33-0x00007FFA85653000-0x00007FFA85655000-memory.dmp

Filesize
8KB

Download
memory/2020-44-0x00007FFA85650000-0x00007FFA86111000-memory.dmp

Filesize
10.8MB

Download
memory/2020-54-0x00007FFA85650000-0x00007FFA86111000-memory.dmp

Filesize
10.8MB

Download
memory/2020-0-0x000002A507700000-0x000002A50770A000-memory.dmp

Filesize
40KB

Download
memory/2020-2-0x00007FFA85650000-0x00007FFA86111000-memory.dmp

Filesize
10.8MB

Download
memory/2020-1-0x00007FFA85653000-0x00007FFA85655000-memory.dmp

Filesize
8KB

Download
memory/3492-42-0x000000001C720000-0x000000001C732000-memory.dmp

Filesize
72KB

Download
memory/3492-43-0x000000001D280000-0x000000001D2BC000-memory.dmp

Filesize
240KB

Download
memory/3492-38-0x000000001C670000-0x000000001C6C0000-memory.dmp

Filesize
320KB

Download
memory/3492-39-0x000000001C780000-0x000000001C832000-memory.dmp

Filesize
712KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads