quasar | 292c186067e3b02d96199bce055b58e873f34411ae86e987639051a7f4910ab9

Analysis

max time kernel
149s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05/04/2024, 00:42

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General

Target
2024-04-05_77ec791818fa2178f83c8b2be17d94ec_icedid_xrat.exe
Size 4.7MB
Sample240405-a2ezvafa9v
SHA256 292c186067e3b02d96199bce055b58e873f34411ae86e987639051a7f4910ab9
MD5 77ec791818fa2178f83c8b2be17d94ec
SHA1 283b1a74d058c21ee9d7fb2c145506bf8d67fc77
SHA512 963322a8ff2cbeaa50ca42a6e6b3d9791df8c82b6bf29ebe683432abac22ec56fbed424e88de976c3c78db083ed361406b48dd1ab48c9e322624e287b836ad8e
SSDEEP 98304:2hKnRcfjYvr22SsaNYfdPBldt6+dBcjHtKRJ6B+IbzZQIbzZY:tLM7jGItBK
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

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 2 IoCs

resource	yara_rule
behavioral2/files/0x00030000000227e7-1.dat	family_quasar
behavioral2/memory/3800-4-0x00000000003B0000-0x00000000006D4000-memory.dmp	family_quasar

Detects Windows executables referencing non-Windows User-Agents 2 IoCs

resource	yara_rule
behavioral2/files/0x00030000000227e7-1.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3800-4-0x00000000003B0000-0x00000000006D4000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 2 IoCs

resource	yara_rule
behavioral2/files/0x00030000000227e7-1.dat	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3800-4-0x00000000003B0000-0x00000000006D4000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables containing common artifacts observed in infostealers 2 IoCs

resource	yara_rule
behavioral2/files/0x00030000000227e7-1.dat	INDICATOR_SUSPICIOUS_GENInfoStealer
behavioral2/memory/3800-4-0x00000000003B0000-0x00000000006D4000-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	2024-04-05_77ec791818fa2178f83c8b2be17d94ec_icedid_xrat.exe

Executes dropped EXE 2 IoCs

pid	Process
3800	sign.exe
3356	Client.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
2128	schtasks.exe
756	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3400	2024-04-05_77ec791818fa2178f83c8b2be17d94ec_icedid_xrat.exe
3400	2024-04-05_77ec791818fa2178f83c8b2be17d94ec_icedid_xrat.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3800	sign.exe
Token: SeDebugPrivilege	3356	Client.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3400	2024-04-05_77ec791818fa2178f83c8b2be17d94ec_icedid_xrat.exe
3400	2024-04-05_77ec791818fa2178f83c8b2be17d94ec_icedid_xrat.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3400 wrote to memory of 3800	3400	2024-04-05_77ec791818fa2178f83c8b2be17d94ec_icedid_xrat.exe	94
PID 3400 wrote to memory of 3800	3400	2024-04-05_77ec791818fa2178f83c8b2be17d94ec_icedid_xrat.exe	94
PID 3800 wrote to memory of 2128	3800	sign.exe	96
PID 3800 wrote to memory of 2128	3800	sign.exe	96
PID 3800 wrote to memory of 3356	3800	sign.exe	98
PID 3800 wrote to memory of 3356	3800	sign.exe	98
PID 3356 wrote to memory of 756	3356	Client.exe	99
PID 3356 wrote to memory of 756	3356	Client.exe	99

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\2024-04-05_77ec791818fa2178f83c8b2be17d94ec_icedid_xrat.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-05_77ec791818fa2178f83c8b2be17d94ec_icedid_xrat.exe"
1⤵
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3400
- 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:3800
- - 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:2128
- - 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:3356
  - - 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:756

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3700 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:8
1⤵
PID:4212

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

sign.exe

Path C:\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

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memory/3356-18-0x000000001D310000-0x000000001D360000-memory.dmp

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memory/3356-16-0x00007FFD3F640000-0x00007FFD40101000-memory.dmp

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memory/3356-17-0x000000001B410000-0x000000001B420000-memory.dmp

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memory/3356-19-0x000000001D420000-0x000000001D4D2000-memory.dmp

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memory/3356-20-0x00007FFD3F640000-0x00007FFD40101000-memory.dmp

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memory/3356-21-0x000000001B410000-0x000000001B420000-memory.dmp

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memory/3400-7-0x00000000029B0000-0x00000000029B1000-memory.dmp

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memory/3400-8-0x00000000029A0000-0x00000000029A1000-memory.dmp

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memory/3800-5-0x00007FFD3F640000-0x00007FFD40101000-memory.dmp

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memory/3800-6-0x000000001B5B0000-0x000000001B5C0000-memory.dmp

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memory/3800-15-0x00007FFD3F640000-0x00007FFD40101000-memory.dmp

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memory/3800-4-0x00000000003B0000-0x00000000006D4000-memory.dmp

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