quasar | f16b09c1b311892dbe11c466c2bf4393f2750e1365e9d3c59983e7b5c03a0734

General

Target
2024-04-11_7157bb4fd707d8feb0688e02de58e2f6_icedid_xrat.exe
Size 4.7MB
Sample240411-av26ssae21
SHA256 f16b09c1b311892dbe11c466c2bf4393f2750e1365e9d3c59983e7b5c03a0734
MD5 7157bb4fd707d8feb0688e02de58e2f6
SHA1 f645fd81e17916034701e03e94109835bdaaa315
SHA512 b665018d4747eeeeba89bbf6620e45478de53e27d24406270723a2c4607ec52f67457a3f8b070203c7a4ae69153fe701f7e515a28248791ed6406bdbc36ec11b
SSDEEP 98304:eYD10K/8fvr22SsaNYfdPBldt6+dBcjHtKRJ6BcIbzZFIbzZR:CKUXM7jGIfAj
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

mx5.deitie.asia:4495

Mutex

ebbf737a-dddd-43dd-9b0a-74831302455d

Attributes

encryption_key
F8516D89A1DFD78BD8FF575BBC3AE828B47FF0E1
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 payload 4 IoCs

resource	yara_rule
behavioral1/files/0x000b00000001225e-1.dat	family_quasar
behavioral1/memory/1756-5-0x0000000000E30000-0x0000000001154000-memory.dmp	family_quasar
behavioral1/memory/2388-15-0x0000000000290000-0x00000000005B4000-memory.dmp	family_quasar
behavioral1/memory/2388-18-0x000000001AFB0000-0x000000001B030000-memory.dmp	family_quasar

Detects Windows executables referencing non-Windows User-Agents 3 IoCs

resource	yara_rule
behavioral1/files/0x000b00000001225e-1.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/1756-5-0x0000000000E30000-0x0000000001154000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2388-15-0x0000000000290000-0x00000000005B4000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 3 IoCs

resource	yara_rule
behavioral1/files/0x000b00000001225e-1.dat	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral1/memory/1756-5-0x0000000000E30000-0x0000000001154000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral1/memory/2388-15-0x0000000000290000-0x00000000005B4000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables containing common artifacts observed in infostealers 3 IoCs

resource	yara_rule
behavioral1/files/0x000b00000001225e-1.dat	INDICATOR_SUSPICIOUS_GENInfoStealer
behavioral1/memory/1756-5-0x0000000000E30000-0x0000000001154000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer
behavioral1/memory/2388-15-0x0000000000290000-0x00000000005B4000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe	2024-04-11_7157bb4fd707d8feb0688e02de58e2f6_icedid_xrat.exe

Executes dropped EXE 2 IoCs

pid	Process
1756	sign.exe
2388	Client.exe

Loads dropped DLL 1 IoCs

pid	Process
2220	2024-04-11_7157bb4fd707d8feb0688e02de58e2f6_icedid_xrat.exe

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

pid	Process
2160	schtasks.exe
2676	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2220	2024-04-11_7157bb4fd707d8feb0688e02de58e2f6_icedid_xrat.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1756	sign.exe
Token: SeDebugPrivilege	2388	Client.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2220	2024-04-11_7157bb4fd707d8feb0688e02de58e2f6_icedid_xrat.exe
2220	2024-04-11_7157bb4fd707d8feb0688e02de58e2f6_icedid_xrat.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2220 wrote to memory of 1756	2220	2024-04-11_7157bb4fd707d8feb0688e02de58e2f6_icedid_xrat.exe	28
PID 2220 wrote to memory of 1756	2220	2024-04-11_7157bb4fd707d8feb0688e02de58e2f6_icedid_xrat.exe	28
PID 2220 wrote to memory of 1756	2220	2024-04-11_7157bb4fd707d8feb0688e02de58e2f6_icedid_xrat.exe	28
PID 2220 wrote to memory of 1756	2220	2024-04-11_7157bb4fd707d8feb0688e02de58e2f6_icedid_xrat.exe	28
PID 1756 wrote to memory of 2160	1756	sign.exe	29
PID 1756 wrote to memory of 2160	1756	sign.exe	29
PID 1756 wrote to memory of 2160	1756	sign.exe	29
PID 1756 wrote to memory of 2388	1756	sign.exe	31
PID 1756 wrote to memory of 2388	1756	sign.exe	31
PID 1756 wrote to memory of 2388	1756	sign.exe	31
PID 2388 wrote to memory of 2676	2388	Client.exe	32
PID 2388 wrote to memory of 2676	2388	Client.exe	32
PID 2388 wrote to memory of 2676	2388	Client.exe	32

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\2024-04-11_7157bb4fd707d8feb0688e02de58e2f6_icedid_xrat.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-11_7157bb4fd707d8feb0688e02de58e2f6_icedid_xrat.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2220
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\\sign.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1756
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2160
- - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2388
  - - C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:2676

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

sign.exe

Path \Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe
Size 3.1MB
SHA256 44089202623b9671051aa5bba5e72f81f68ce818c3054dde57726aaa6dcb9ff7
MD5 7498d554976744dfbd271ba755c6c192
SHA1 ec733d01e776518e387d2f51d1a6559b81f03b1e
SHA512 d4e987d0e6235001fac4ae3a634e8fe98c6830e26a6a6876fbc36262842688d3ec301cff75003d2af695cdfd357ac50919946695b7d5d3293ebcba97153e1030
SSDEEP 49152:KvmI22SsaNYfdPBldt698dBcjHtKRJ6vbR3LoGd8PTHHB72eh2NT:Kvr22SsaNYfdPBldt6+dBcjHtKRJ6B
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1756-5-0x0000000000E30000-0x0000000001154000-memory.dmp

Download

memory/1756-6-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Download

memory/1756-7-0x000000001B610000-0x000000001B690000-memory.dmp

Download

memory/1756-14-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Download

memory/2388-13-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Download

memory/2388-15-0x0000000000290000-0x00000000005B4000-memory.dmp

Download

memory/2388-16-0x000000001AFB0000-0x000000001B030000-memory.dmp

Download

memory/2388-17-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Download

memory/2388-18-0x000000001AFB0000-0x000000001B030000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads