quasar | ce54308e4ba6119f23d6e430e936d1f7dc5f8156c61003e05883c7adbf94e9d9

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20250211-en
resource tags

arch:x64arch:x86image:win10v2004-20250211-enlocale:en-usos:windows10-2004-x64system
submitted
11-02-2025 17:27

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General

Target

Quote RFQ #00926720250204.pdf(39kb).com.exe
Size

3.6MB
MD5

07a4d2a1981e4159e744e3f0bb8d655f
SHA1

fe47d1646972e85667408a28d8db2f2c17b7a313
SHA256

ce54308e4ba6119f23d6e430e936d1f7dc5f8156c61003e05883c7adbf94e9d9
SHA512

b03cd73c43a0e6a536857b523fa5c96910bf8a73002bb4bd7b8315f951eb9e1f625e3e3804a31cec689b6d8a427df600547cf4becf8494c3c3397a2382a55a4e
SSDEEP

98304:6inq/fUlXQu4UB5uq8yPk4KVJgGSg/RSpSTddPTC:3q/fyD4UAlyfKV7Sg/QwTrP

Score

10^/10

quasar es code discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

ES CODE

twart.myfirewall.org:9792

rency.ydns.eu:5287

wqo9.firewall-gateway.de:8841

code1.ydns.eu:5287

wqo9.firewall-gateway.de:9792

Mutex

025351e291-5d1041-4fa37-932c7-8L69aeiQec514992

Attributes

encryption_key
3145298725BA5E0DD56E87FFE3F8898EA81E6EDA
install_name
Excelworkbook.exe
log_directory
Logs
reconnect_delay
6000
startup_key
pdfdocument
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
behavioral2/memory/3680-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 3 IoCs

pid	Process
980	Excelworkbook.exe
3932	Excelworkbook.exe
224	Excelworkbook.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
12	api.ipify.org
16	api.ipify.org

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5048 set thread context of 3680	5048	Quote RFQ #00926720250204.pdf(39kb).com.exe	88
PID 980 set thread context of 224	980	Excelworkbook.exe	93

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Quote RFQ #00926720250204.pdf(39kb).com.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Excelworkbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Excelworkbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Quote RFQ #00926720250204.pdf(39kb).com.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

pid	Process
3116	schtasks.exe
1076	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5048	Quote RFQ #00926720250204.pdf(39kb).com.exe
5048	Quote RFQ #00926720250204.pdf(39kb).com.exe
5048	Quote RFQ #00926720250204.pdf(39kb).com.exe
5048	Quote RFQ #00926720250204.pdf(39kb).com.exe
980	Excelworkbook.exe
980	Excelworkbook.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	5048	Quote RFQ #00926720250204.pdf(39kb).com.exe
Token: SeDebugPrivilege	3680	Quote RFQ #00926720250204.pdf(39kb).com.exe
Token: SeDebugPrivilege	980	Excelworkbook.exe
Token: SeDebugPrivilege	224	Excelworkbook.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
224	Excelworkbook.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 5048 wrote to memory of 4064	5048	Quote RFQ #00926720250204.pdf(39kb).com.exe	86
PID 5048 wrote to memory of 4064	5048	Quote RFQ #00926720250204.pdf(39kb).com.exe	86
PID 5048 wrote to memory of 4064	5048	Quote RFQ #00926720250204.pdf(39kb).com.exe	86
PID 5048 wrote to memory of 912	5048	Quote RFQ #00926720250204.pdf(39kb).com.exe	87
PID 5048 wrote to memory of 912	5048	Quote RFQ #00926720250204.pdf(39kb).com.exe	87
PID 5048 wrote to memory of 912	5048	Quote RFQ #00926720250204.pdf(39kb).com.exe	87
PID 5048 wrote to memory of 3680	5048	Quote RFQ #00926720250204.pdf(39kb).com.exe	88
PID 5048 wrote to memory of 3680	5048	Quote RFQ #00926720250204.pdf(39kb).com.exe	88
PID 5048 wrote to memory of 3680	5048	Quote RFQ #00926720250204.pdf(39kb).com.exe	88
PID 5048 wrote to memory of 3680	5048	Quote RFQ #00926720250204.pdf(39kb).com.exe	88
PID 5048 wrote to memory of 3680	5048	Quote RFQ #00926720250204.pdf(39kb).com.exe	88
PID 5048 wrote to memory of 3680	5048	Quote RFQ #00926720250204.pdf(39kb).com.exe	88
PID 5048 wrote to memory of 3680	5048	Quote RFQ #00926720250204.pdf(39kb).com.exe	88
PID 5048 wrote to memory of 3680	5048	Quote RFQ #00926720250204.pdf(39kb).com.exe	88
PID 3680 wrote to memory of 3116	3680	Quote RFQ #00926720250204.pdf(39kb).com.exe	89
PID 3680 wrote to memory of 3116	3680	Quote RFQ #00926720250204.pdf(39kb).com.exe	89
PID 3680 wrote to memory of 3116	3680	Quote RFQ #00926720250204.pdf(39kb).com.exe	89
PID 3680 wrote to memory of 980	3680	Quote RFQ #00926720250204.pdf(39kb).com.exe	91
PID 3680 wrote to memory of 980	3680	Quote RFQ #00926720250204.pdf(39kb).com.exe	91
PID 3680 wrote to memory of 980	3680	Quote RFQ #00926720250204.pdf(39kb).com.exe	91
PID 980 wrote to memory of 3932	980	Excelworkbook.exe	92
PID 980 wrote to memory of 3932	980	Excelworkbook.exe	92
PID 980 wrote to memory of 3932	980	Excelworkbook.exe	92
PID 980 wrote to memory of 224	980	Excelworkbook.exe	93
PID 980 wrote to memory of 224	980	Excelworkbook.exe	93
PID 980 wrote to memory of 224	980	Excelworkbook.exe	93
PID 980 wrote to memory of 224	980	Excelworkbook.exe	93
PID 980 wrote to memory of 224	980	Excelworkbook.exe	93
PID 980 wrote to memory of 224	980	Excelworkbook.exe	93
PID 980 wrote to memory of 224	980	Excelworkbook.exe	93
PID 980 wrote to memory of 224	980	Excelworkbook.exe	93
PID 224 wrote to memory of 1076	224	Excelworkbook.exe	94
PID 224 wrote to memory of 1076	224	Excelworkbook.exe	94
PID 224 wrote to memory of 1076	224	Excelworkbook.exe	94

C:\Users\Admin\AppData\Local\Temp\Quote RFQ #00926720250204.pdf(39kb).com.exe
"C:\Users\Admin\AppData\Local\Temp\Quote RFQ #00926720250204.pdf(39kb).com.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5048
- C:\Users\Admin\AppData\Local\Temp\Quote RFQ #00926720250204.pdf(39kb).com.exe
  "C:\Users\Admin\AppData\Local\Temp\Quote RFQ #00926720250204.pdf(39kb).com.exe"
  2⤵
  PID:4064
- C:\Users\Admin\AppData\Local\Temp\Quote RFQ #00926720250204.pdf(39kb).com.exe
  "C:\Users\Admin\AppData\Local\Temp\Quote RFQ #00926720250204.pdf(39kb).com.exe"
  2⤵
  PID:912
- C:\Users\Admin\AppData\Local\Temp\Quote RFQ #00926720250204.pdf(39kb).com.exe
  "C:\Users\Admin\AppData\Local\Temp\Quote RFQ #00926720250204.pdf(39kb).com.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3680
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "pdfdocument" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3116
- - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:980
  - - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
      4⤵
      Executes dropped EXE
      PID:3932
  - - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:224
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "pdfdocument" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1076

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

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\Quote RFQ #00926720250204.pdf(39kb).com.exe.log

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

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

Filesize
3.6MB

MD5
07a4d2a1981e4159e744e3f0bb8d655f

SHA1
fe47d1646972e85667408a28d8db2f2c17b7a313

SHA256
ce54308e4ba6119f23d6e430e936d1f7dc5f8156c61003e05883c7adbf94e9d9

SHA512
b03cd73c43a0e6a536857b523fa5c96910bf8a73002bb4bd7b8315f951eb9e1f625e3e3804a31cec689b6d8a427df600547cf4becf8494c3c3397a2382a55a4e

Download Submit
memory/224-34-0x0000000008190000-0x00000000081F6000-memory.dmp

Filesize
408KB

Download
memory/224-33-0x0000000006B60000-0x0000000006C12000-memory.dmp

Filesize
712KB

Download
memory/224-32-0x00000000068F0000-0x0000000006940000-memory.dmp

Filesize
320KB

Download
memory/224-31-0x0000000006D70000-0x0000000007388000-memory.dmp

Filesize
6.1MB

Download
memory/980-30-0x0000000073FC0000-0x0000000074770000-memory.dmp

Filesize
7.7MB

Download
memory/980-24-0x0000000073FC0000-0x0000000074770000-memory.dmp

Filesize
7.7MB

Download
memory/980-23-0x0000000073FC0000-0x0000000074770000-memory.dmp

Filesize
7.7MB

Download
memory/3680-13-0x0000000073FC0000-0x0000000074770000-memory.dmp

Filesize
7.7MB

Download
memory/3680-15-0x0000000073FC0000-0x0000000074770000-memory.dmp

Filesize
7.7MB

Download
memory/3680-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3680-22-0x0000000073FC0000-0x0000000074770000-memory.dmp

Filesize
7.7MB

Download
memory/5048-8-0x0000000073FC0000-0x0000000074770000-memory.dmp

Filesize
7.7MB

Download
memory/5048-14-0x0000000073FC0000-0x0000000074770000-memory.dmp

Filesize
7.7MB

Download
memory/5048-9-0x0000000006560000-0x00000000068C8000-memory.dmp

Filesize
3.4MB

Download
memory/5048-10-0x000000000C660000-0x000000000C6FC000-memory.dmp

Filesize
624KB

Download
memory/5048-0-0x0000000073FCE000-0x0000000073FCF000-memory.dmp

Filesize
4KB

Download
memory/5048-7-0x0000000073FCE000-0x0000000073FCF000-memory.dmp

Filesize
4KB

Download
memory/5048-6-0x0000000005A90000-0x0000000005AAE000-memory.dmp

Filesize
120KB

Download
memory/5048-5-0x0000000073FC0000-0x0000000074770000-memory.dmp

Filesize
7.7MB

Download
memory/5048-4-0x00000000054A0000-0x00000000054AA000-memory.dmp

Filesize
40KB

Download
memory/5048-3-0x0000000005310000-0x00000000053A2000-memory.dmp

Filesize
584KB

Download
memory/5048-2-0x0000000005AB0000-0x0000000006054000-memory.dmp

Filesize
5.6MB

Download
memory/5048-1-0x0000000000590000-0x0000000000932000-memory.dmp

Filesize
3.6MB

Download