quasar | a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b

General

Target

a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
Size

3.5MB
MD5

4a82d22fa6354daece680e49deb2ca2b
SHA1

370b26a5e33c3ae9fc567a22b57eedeb31b285c8
SHA256

a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b
SHA512

1e5870c81ff59dab2afb07ab29d6ac1a5effdc6a869f9e0b23afeee0418d690cf46c05edd8825ba8b4a7b6e9fef3cf002115f41ec6a727a1c866ba94d739ff78
SSDEEP

98304:AKUGRNTsLRvcuO0EcF40Qyiptb28Guy2NprIgq:AjAov9Ou6cipx072Nprb

Score

10^/10

quasar jekwu discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

JEKWU

C2

Zyg.ydns.eu:5829

Opy.ydns.eu:5829

Mutex

9c58b2ba-07eb-415a-b48b-21bbb68d32285e

Attributes

encryption_key
C5B555A83D127A9553D4FB1FCECB35CE8E91A447
install_name
outlooks.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Outlooks
subdirectory
WindowsUpdates

Signatures

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

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1784-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

Processes:

outlooks.exeoutlooks.exe

pid process

1528 outlooks.exe
3468 outlooks.exe

pid	process
1528	outlooks.exe
3468	outlooks.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exeoutlooks.exe

description	pid	process	target process
PID 3924 set thread context of 1784	3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
PID 1528 set thread context of 3468	1528	outlooks.exe	outlooks.exe

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

schtasks.exea83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exea83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exeschtasks.exeoutlooks.exeoutlooks.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	outlooks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	outlooks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exeschtasks.exe

pid process

2472 schtasks.exe
408 schtasks.exe

pid	process
2472	schtasks.exe
408	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe

pid	process
3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exea83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exeoutlooks.exe

description	pid	process
Token: SeDebugPrivilege	3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
Token: SeDebugPrivilege	1784	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
Token: SeDebugPrivilege	3468	outlooks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

outlooks.exe

pid process

3468 outlooks.exe

pid	process
3468	outlooks.exe

Suspicious use of WriteProcessMemory 31 IoCs

Processes:

a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exea83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exeoutlooks.exeoutlooks.exe

description	pid	process	target process
PID 3924 wrote to memory of 3060	3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
PID 3924 wrote to memory of 3060	3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
PID 3924 wrote to memory of 3060	3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
PID 3924 wrote to memory of 760	3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
PID 3924 wrote to memory of 760	3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
PID 3924 wrote to memory of 760	3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
PID 3924 wrote to memory of 1784	3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
PID 3924 wrote to memory of 1784	3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
PID 3924 wrote to memory of 1784	3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
PID 3924 wrote to memory of 1784	3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
PID 3924 wrote to memory of 1784	3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
PID 3924 wrote to memory of 1784	3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
PID 3924 wrote to memory of 1784	3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
PID 3924 wrote to memory of 1784	3924	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
PID 1784 wrote to memory of 2472	1784	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	schtasks.exe
PID 1784 wrote to memory of 2472	1784	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	schtasks.exe
PID 1784 wrote to memory of 2472	1784	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	schtasks.exe
PID 1784 wrote to memory of 1528	1784	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	outlooks.exe
PID 1784 wrote to memory of 1528	1784	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	outlooks.exe
PID 1784 wrote to memory of 1528	1784	a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe	outlooks.exe
PID 1528 wrote to memory of 3468	1528	outlooks.exe	outlooks.exe
PID 1528 wrote to memory of 3468	1528	outlooks.exe	outlooks.exe
PID 1528 wrote to memory of 3468	1528	outlooks.exe	outlooks.exe
PID 1528 wrote to memory of 3468	1528	outlooks.exe	outlooks.exe
PID 1528 wrote to memory of 3468	1528	outlooks.exe	outlooks.exe
PID 1528 wrote to memory of 3468	1528	outlooks.exe	outlooks.exe
PID 1528 wrote to memory of 3468	1528	outlooks.exe	outlooks.exe
PID 1528 wrote to memory of 3468	1528	outlooks.exe	outlooks.exe
PID 3468 wrote to memory of 408	3468	outlooks.exe	schtasks.exe
PID 3468 wrote to memory of 408	3468	outlooks.exe	schtasks.exe
PID 3468 wrote to memory of 408	3468	outlooks.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
"C:\Users\Admin\AppData\Local\Temp\a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3924
- C:\Users\Admin\AppData\Local\Temp\a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
  "C:\Users\Admin\AppData\Local\Temp\a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe"
  2⤵
  PID:3060
- C:\Users\Admin\AppData\Local\Temp\a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
  "C:\Users\Admin\AppData\Local\Temp\a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe"
  2⤵
  PID:760
- C:\Users\Admin\AppData\Local\Temp\a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe
  "C:\Users\Admin\AppData\Local\Temp\a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1784
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Outlooks" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2472
- - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
    "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1528
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:3468
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "Outlooks" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:408

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b.exe.log

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

Download Submit
C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe

Filesize
3.5MB

MD5
4a82d22fa6354daece680e49deb2ca2b

SHA1
370b26a5e33c3ae9fc567a22b57eedeb31b285c8

SHA256
a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b

SHA512
1e5870c81ff59dab2afb07ab29d6ac1a5effdc6a869f9e0b23afeee0418d690cf46c05edd8825ba8b4a7b6e9fef3cf002115f41ec6a727a1c866ba94d739ff78

Download Submit
memory/1528-30-0x00000000753B0000-0x0000000075B60000-memory.dmp

Filesize
7.7MB

Download
memory/1528-26-0x0000000005A00000-0x0000000005A12000-memory.dmp

Filesize
72KB

Download
memory/1528-25-0x00000000753B0000-0x0000000075B60000-memory.dmp

Filesize
7.7MB

Download
memory/1528-24-0x00000000753B0000-0x0000000075B60000-memory.dmp

Filesize
7.7MB

Download
memory/1528-22-0x00000000753B0000-0x0000000075B60000-memory.dmp

Filesize
7.7MB

Download
memory/1784-23-0x00000000753B0000-0x0000000075B60000-memory.dmp

Filesize
7.7MB

Download
memory/1784-14-0x00000000753B0000-0x0000000075B60000-memory.dmp

Filesize
7.7MB

Download
memory/1784-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/1784-16-0x00000000753B0000-0x0000000075B60000-memory.dmp

Filesize
7.7MB

Download
memory/3468-33-0x0000000006230000-0x00000000062E2000-memory.dmp

Filesize
712KB

Download
memory/3468-32-0x0000000005FC0000-0x0000000006010000-memory.dmp

Filesize
320KB

Download
memory/3468-31-0x0000000006480000-0x0000000006A98000-memory.dmp

Filesize
6.1MB

Download
memory/3924-5-0x0000000005770000-0x000000000580C000-memory.dmp

Filesize
624KB

Download
memory/3924-15-0x00000000753B0000-0x0000000075B60000-memory.dmp

Filesize
7.7MB

Download
memory/3924-8-0x00000000054D0000-0x00000000054E2000-memory.dmp

Filesize
72KB

Download
memory/3924-6-0x00000000753B0000-0x0000000075B60000-memory.dmp

Filesize
7.7MB

Download
memory/3924-0-0x00000000753BE000-0x00000000753BF000-memory.dmp

Filesize
4KB

Download
memory/3924-4-0x0000000005490000-0x000000000549A000-memory.dmp

Filesize
40KB

Download
memory/3924-3-0x00000000054F0000-0x0000000005582000-memory.dmp

Filesize
584KB

Download
memory/3924-2-0x0000000005AA0000-0x0000000006044000-memory.dmp

Filesize
5.6MB

Download
memory/3924-1-0x0000000000700000-0x0000000000A90000-memory.dmp

Filesize
3.6MB

Download
memory/3924-7-0x00000000753BE000-0x00000000753BF000-memory.dmp

Filesize
4KB

Download
memory/3924-10-0x0000000007AC0000-0x0000000007E28000-memory.dmp

Filesize
3.4MB

Download
memory/3924-9-0x00000000753B0000-0x0000000075B60000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads