MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b4a61a178dfda52928802e1189f3bf1bef1c03aecf6b6fc99d2a3713f3d5e202. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


QuasarRAT


Vendor detections: 18


Intelligence 18 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b4a61a178dfda52928802e1189f3bf1bef1c03aecf6b6fc99d2a3713f3d5e202
SHA3-384 hash: 4016cb64ee44f866d36253372dc0bde92da56e9c9da3403b38f05ade14c449505f52a0fd11436d0f506bfa629cb20bf7
SHA1 hash: f255e8e514826f27e003e443cf319eda0198d674
MD5 hash: f5045f23c9ebfcda88db9a040544f462
humanhash: twenty-floor-helium-golf
File name:doc_Pedido 02024091622008176.com
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:3'737'600 bytes
First seen:2024-09-17 15:10:27 UTC
Last seen:2024-09-17 15:42:33 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 98304:USoojQ+OrsBIzoIqb+T8b1YfzUt/KrXcpQtiBlWK8:U9oteiIcIwy8CfzUtWcp5Y
Threatray 823 similar samples on MalwareBazaar
TLSH T170063352F37887A8F86FE63881584418137332701EB2D5517ECB5DBFA898B20E9D8B74
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10523/12/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
File icon (PE):PE icon
dhash icon e08e63797963aef8 (1 x Formbook, 1 x QuasarRAT)
Reporter abuse_ch
Tags:com exe QuasarRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
404
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
asyncrat
Create hunting rule
ID:
1
File name:
doc_Pedido 02024091622008176.com
Verdict:
Malicious activity
Analysis date:
2024-09-17 15:28:47 UTC
Tags:
rat asyncrat remote quasar evasion
Link:
https://app.any.run/tasks/7bbbbbce-d612-46a8-81e7-d3af4273e9a5

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.RATX-gen.30602.4904.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66e99c095d6a2b58599a97bc
Tags:
Execution Generic Network Static Stealth Nekark
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
89%
Tags:
finger lolbin masquerade packed
Link:
https://www.filescan.io/uploads/66e99c0f800c7315e1ca2217/reports/99121543-84f7-45b7-9975-462efdf8750b/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/b4a61a178dfda52928802e1189f3bf1bef1c03aecf6b6fc99d2a3713f3d5e202
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/ec685986-17eb-480e-88c6-2f46bde05ff5
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1512678
Signature
.NET source code contains potential unpacker
AI detected suspicious sample
C2 URLs / IPs found in malware configuration
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected Generic Downloader
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1512678 Sample: doc_Pedido 0202409162200817... Startdate: 17/09/2024 Architecture: WINDOWS Score: 100 48 twart.myfirewall.org 2->48 50 ipwho.is 2->50 58 Suricata IDS alerts for network traffic 2->58 60 Found malware configuration 2->60 62 Malicious sample detected (through community Yara rule) 2->62 64 10 other signatures 2->64 11 doc_Pedido 02024091622008176.com.exe 3 2->11         started        15 workbook.exe 2 2->15         started        signatures3 process4 file5 46 doc_Pedido 02024091622008176.com.exe.log, ASCII 11->46 dropped 70 Injects a PE file into a foreign processes 11->70 17 doc_Pedido 02024091622008176.com.exe 4 11->17         started        21 doc_Pedido 02024091622008176.com.exe 11->21         started        23 doc_Pedido 02024091622008176.com.exe 11->23         started        25 workbook.exe 15->25         started        27 workbook.exe 15->27         started        signatures6 process7 file8 44 C:\Users\user\AppData\...\workbook.exe, PE32 17->44 dropped 56 Hides that the sample has been downloaded from the Internet (zone.identifier) 17->56 29 workbook.exe 3 17->29         started        32 schtasks.exe 1 17->32         started        signatures9 process10 signatures11 72 Multi AV Scanner detection for dropped file 29->72 74 Machine Learning detection for dropped file 29->74 76 Injects a PE file into a foreign processes 29->76 34 workbook.exe 15 2 29->34         started        38 conhost.exe 32->38         started        process12 dnsIp13 52 twart.myfirewall.org 213.159.74.80, 49705, 9792 CTINET-ASCTINETAutonomousSystemRU Russian Federation 34->52 54 ipwho.is 195.201.57.90, 443, 49707 HETZNER-ASDE Germany 34->54 66 Hides that the sample has been downloaded from the Internet (zone.identifier) 34->66 68 Installs a global keyboard hook 34->68 40 schtasks.exe 1 34->40         started        signatures14 process15 process16 42 conhost.exe 40->42         started       
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b4a61a178dfda52928802e1189f3bf1bef1c03aecf6b6fc99d2a3713f3d5e202
Detection:
quasar
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b4a61a178dfda52928802e1189f3bf1bef1c03aecf6b6fc99d2a3713f3d5e202/
Threat name:
Win32.Backdoor.Quasarrat
Create hunting rule
Status:
Suspicious
First seen:
2024-09-16 12:26:20 UTC
File Type:
PE (.Net Exe)
Extracted files:
8
AV detection:
19 of 38 (50.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wstbuf4n7wssskeafyiyt457dpxrya5oz5vw7sm5fi3rh46v4iba._file
Verdict:
malicious
Similar samples:
01d7838a7a970a4fca588740cf6f8129f4ae01b0d9936eb43a1aff9436b848a2
QuasarRAT
3255bba29d1d4de38cb9d72636251ed19516ee5c090512f4332f38b837cf13f0
QuasarRAT
73399ca48340bd7a31da27d573966f23371fe4ea82625ee3b7ce2772386b9e04
QuasarRAT
fd3b039df3e9a565b6964276f98c61d4555f3f3dabf1a9d76604f9ff4d4b3fb7
QuasarRAT
+ 813 additional samples on MalwareBazaar
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:long leg discovery spyware trojan
Link:
https://tria.ge/reports/240917-skl1yazepj/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Executes dropped EXE
Loads dropped DLL
Quasar RAT
Quasar payload
Malware Config
C2 Extraction:
twart.myfirewall.org:9792
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/33d5dbef-5007-41d0-abde-1f228e3ad096
Unpacked files
SH256 hash:
c5cb97fbe4243df1a99a9c82f44ad555f283fad9f4b15b791faebe5048c8fc99
MD5 hash:
3e8b57c2be9df63483a368b71ccb938b
SHA1 hash:
deb26a1b7f616c8d392ae55dd279140b034a4060
Detections:
QuasarRAT
Create hunting rule
malware_windows_xrat_quasarrat
Create hunting rule
win_quasarrat_j2
Create hunting rule
cn_utf8_windows_terminal
Create hunting rule
MAL_QuasarRAT_May19_1
Create hunting rule
Link:
https://www.unpac.me/results/66b7e106-a74d-436b-97d1-cfa02f331bb2/
Parent samples :
5a3a32262eb6d6ca3126a6055e32cd1c0a680637b3f238d0fbb0e36bc9b8081d
3255bba29d1d4de38cb9d72636251ed19516ee5c090512f4332f38b837cf13f0
d80b06effbd34b981b32276034abe3c118ac51a53ace4a253bb52c90cb18f13d
a388e34ff2cb46b718c443618a4597468bfc2236195c06bccbfa71dbf5d47479
c40f2fe5758bf18b22131930c426b2551b191d4ec50ea072a232895d006eace1
c5cb97fbe4243df1a99a9c82f44ad555f283fad9f4b15b791faebe5048c8fc99
6230049aca6cf64db37be7c35946481041629c4f40311f5a39ba45303bd992e7
f9fe40ca4d842619322a11c4013a2210132d4c7afa0c4ae88be17f13ee6d1b16
fd3b039df3e9a565b6964276f98c61d4555f3f3dabf1a9d76604f9ff4d4b3fb7
b4a61a178dfda52928802e1189f3bf1bef1c03aecf6b6fc99d2a3713f3d5e202
SH256 hash:
1b727719d548c93b677a6e55184ae74bc4a85e2e217289634f563516327e8c0d
MD5 hash:
f971f6bb7308654f0013bfc2622b5399
SHA1 hash:
ddca047095e2c0160bed312c9447f74b729bd111
Link:
https://www.unpac.me/results/66b7e106-a74d-436b-97d1-cfa02f331bb2/
Parent samples :
67f4b6cba186520b5247fa0ec23e129dd20c51640662108c2b9db61cf968f17d
bc5ee788c33389a426c9b5b10405a41a83f6875864bf09b0de6df15ab88cfbda
3bd3c438394939146b7e081e05cd0973bcc7c7d01f624502f70ff7f7da986a41
SH256 hash:
a75b0bcf7f7a1a6ce297abf7190e9b9e0157f1365f9e9dc1e2a254b3d157fee8
MD5 hash:
9c2062da9e5d51fa85b6d21dc2eb038b
SHA1 hash:
399170a80cd385dfeb5eabc59d65d0d70696f4cb
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/66b7e106-a74d-436b-97d1-cfa02f331bb2/
SH256 hash:
b4a61a178dfda52928802e1189f3bf1bef1c03aecf6b6fc99d2a3713f3d5e202
MD5 hash:
f5045f23c9ebfcda88db9a040544f462
SHA1 hash:
f255e8e514826f27e003e443cf319eda0198d674
Link:
https://www.unpac.me/results/66b7e106-a74d-436b-97d1-cfa02f331bb2/
Malware family:
QuasarRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b4a61a178dfd/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b4a61a178dfda52928802e1189f3bf1bef1c03aecf6b6fc99d2a3713f3d5e202

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:AgentTesla_DIFF_Common_Strings_01
Create hunting rule
Author:schmidtsz
Description:Identify partial Agent Tesla strings
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

The table below shows additional information about this malware sample such as delivery method and external references.

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high

Comments