MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 da1fce77ce31c7d431dc7cb2a3f6c93f829240263cf9bef0c97f613320ad5635. 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


Formbook


Vendor detections: 15


Intelligence 15 IOCs YARA 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: da1fce77ce31c7d431dc7cb2a3f6c93f829240263cf9bef0c97f613320ad5635
SHA3-384 hash: 3543bdb748fc7508b01ba4fae355f0de02167507fa7de2e29b8c4b5b65a9bd41134838870c996b738a248f456e75a5f9
SHA1 hash: 99b73eddf4e40f0d6ce10d2cc54a07aea179f94a
MD5 hash: 8913cd4620099d5260d3a72190473498
humanhash: mockingbird-magnesium-yellow-artist
File name:RFQ RFQ-A-00090303885-xlsx.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'074'184 bytes
First seen:2025-02-05 03:35:40 UTC
Last seen:2025-02-05 04:30:23 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'600 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 24576:xXlg48SAa2dg7GmW98z1wFALQl/l2jnv6DIAEaiUf+v:xXl58L5F9210Ast2Tv6DLiUmv
Threatray 63 similar samples on MalwareBazaar
TLSH T11335017EE2F78F22DB6D0532C5E0AD2893B3B5859031F38D148524DAEC1DFA8295572B
TrID 67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.7% (.EXE) Win64 Executable (generic) (10522/11/4)
6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.1% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
File icon (PE):PE icon
dhash icon 8018b49492b41880 (13 x Formbook, 4 x AgentTesla, 4 x MassLogger)
Reporter threatcat_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
528
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
RFQ RFQ-A-00090303885-xlsx.exe
Verdict:
Malicious activity
Analysis date:
2025-02-05 03:37:39 UTC
Tags:
netreactor
Link:
https://app.any.run/tasks/519e40f6-ee1c-4856-9b9a-cb3ee1e5b670

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.PWSX-gen.7298.27801.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67a2ddab2dcee78dd8196a42
Tags:
underscore injection obfusc shell
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a file in the %temp% directory
Launching a process
Creating a file
Forced shutdown of a system process
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
invalid-signature net_reactor obfuscated obfuscated obfuscated packed packed packer_detected signed vbnet
Link:
https://www.filescan.io/uploads/67a2dcb2288b2a13362b6daa/reports/6a13d9bd-7392-4aa4-9480-bf34f620e905/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/da1fce77ce31c7d431dc7cb2a3f6c93f829240263cf9bef0c97f613320ad5635
Result
Verdict:
SUSPICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/4cbf0f12-bd11-4849-b236-42d880d4cdb5
Result
Threat name:
FormBook, PureLog Stealer
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1607100
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
Antivirus detection for URL or domain
Found direct / indirect Syscall (likely to bypass EDR)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Machine Learning detection for dropped file
Machine Learning detection for sample
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Scheduled temp file as task from temp location
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Yara detected PureLog Stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1607100 Sample: RFQ RFQ-A-00090303885-xlsx.exe Startdate: 05/02/2025 Architecture: WINDOWS Score: 100 59 www.visionaryb.site 2->59 61 nocoma.berlin 2->61 63 14 other IPs or domains 2->63 75 Suricata IDS alerts for network traffic 2->75 77 Antivirus detection for URL or domain 2->77 79 Sigma detected: Scheduled temp file as task from temp location 2->79 81 12 other signatures 2->81 10 RFQ RFQ-A-00090303885-xlsx.exe 7 2->10         started        14 HbVFZsaSKj.exe 5 2->14         started        signatures3 process4 file5 51 C:\Users\user\AppData\...\HbVFZsaSKj.exe, PE32 10->51 dropped 53 C:\Users\...\HbVFZsaSKj.exe:Zone.Identifier, ASCII 10->53 dropped 55 C:\Users\user\AppData\Local\...\tmpCB2A.tmp, XML 10->55 dropped 57 C:\...\RFQ RFQ-A-00090303885-xlsx.exe.log, ASCII 10->57 dropped 91 Writes to foreign memory regions 10->91 93 Allocates memory in foreign processes 10->93 95 Adds a directory exclusion to Windows Defender 10->95 16 RegSvcs.exe 10->16         started        19 powershell.exe 23 10->19         started        21 powershell.exe 23 10->21         started        23 schtasks.exe 1 10->23         started        97 Multi AV Scanner detection for dropped file 14->97 99 Machine Learning detection for dropped file 14->99 101 Injects a PE file into a foreign processes 14->101 25 schtasks.exe 1 14->25         started        27 RegSvcs.exe 14->27         started        signatures6 process7 signatures8 71 Maps a DLL or memory area into another process 16->71 29 DUSIwO8GHU3sLb.exe 16->29 injected 73 Loading BitLocker PowerShell Module 19->73 32 WmiPrvSE.exe 19->32         started        34 conhost.exe 19->34         started        36 conhost.exe 21->36         started        38 conhost.exe 23->38         started        40 conhost.exe 25->40         started        process9 signatures10 103 Found direct / indirect Syscall (likely to bypass EDR) 29->103 42 MuiUnattend.exe 3 29->42         started        process11 signatures12 83 Tries to steal Mail credentials (via file / registry access) 42->83 85 Tries to harvest and steal browser information (history, passwords, etc) 42->85 87 Modifies the context of a thread in another process (thread injection) 42->87 89 3 other signatures 42->89 45 DUSIwO8GHU3sLb.exe 42->45 injected 49 firefox.exe 42->49         started        process13 dnsIp14 65 an05-prod-x.cdn-ng.net 43.251.56.161, 49998, 49999, 50000 WSN-TW-NET-ASWorldstarNetworkTW Taiwan; Republic of China (ROC) 45->65 67 www.visionaryb.site 67.223.117.189, 49986, 49987, 49988 VIMRO-AS15189US United States 45->67 69 8 other IPs or domains 45->69 105 Found direct / indirect Syscall (likely to bypass EDR) 45->105 signatures15
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/da1fce77ce31c7d431dc7cb2a3f6c93f829240263cf9bef0c97f613320ad5635
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/da1fce77ce31c7d431dc7cb2a3f6c93f829240263cf9bef0c97f613320ad5635/
Threat name:
Win32.Exploit.PureLogStealer
Create hunting rule
Status:
Malicious
First seen:
2025-02-05 03:36:17 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
20 of 23 (86.96%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=3ip4456oghd5imo4pszkh5wjh6bjeqbght4354gjp5qtgifnky2q._file
Verdict:
malicious
Label(s):
unknown_loader_037
Create hunting rule
Similar samples:
10a5c29d6a44de5b996598f71820bff8c29cc6b5229d2c7ec0664b601d81068d
Formbook
340ed59c2911d06aeeebed6de544b2cc1f34001b67c5f4c7625293c824063377
Formbook
5b2a4d07425414d3e00bfe400df7cf20526f32e9b29f4b7eefb07ddc38720a15
Formbook
a247965461e20da5cf0f7a31daeae7fed5eb49c4a19af705f33b8c25f6230d3d
Formbook
error
Formbook
f66c0624be9a63170f70c2c6cbff7a2869933419846557da5407a0ea3de7a004
Formbook
+ 53 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
discovery execution
Link:
https://tria.ge/reports/250205-d5ysxaxmet/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Verdict:
Unknown
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/903826e3-37dd-4986-8417-05c9c2eef8fa
Unpacked files
SH256 hash:
da1fce77ce31c7d431dc7cb2a3f6c93f829240263cf9bef0c97f613320ad5635
MD5 hash:
8913cd4620099d5260d3a72190473498
SHA1 hash:
99b73eddf4e40f0d6ce10d2cc54a07aea179f94a
Link:
https://www.unpac.me/results/235dde91-47c8-4f03-aa09-a2a0a2d38d74/
SH256 hash:
3cbf953714fcad4c14d17718b7a97fffb00b11335193f95cd72b9e7e2099b447
MD5 hash:
637b7b3a7998eff1c5b73d3c7073893e
SHA1 hash:
12e4cbf1a38bd7f8212bf20193ad89a71a3b2a33
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/235dde91-47c8-4f03-aa09-a2a0a2d38d74/
SH256 hash:
0a6cc00c1058d688a88cc428bec46234e35a0deb62fba37e2a18ce5cc81bcd54
MD5 hash:
cb85655848c0ca6ae65c080633345e69
SHA1 hash:
9fa1e20d02287e77f5b2ddbb65604a6f6f58b477
Link:
https://www.unpac.me/results/235dde91-47c8-4f03-aa09-a2a0a2d38d74/
SH256 hash:
f949dcb50b0591d6986a229301badb6d8814f5a08be2bf40e8483a9e504e5c09
MD5 hash:
1f24e5b3c19bb85f071846f51a621fdf
SHA1 hash:
c40d9e3d6c6d2f30756c6998a2fcdad72dc29f03
Link:
https://www.unpac.me/results/235dde91-47c8-4f03-aa09-a2a0a2d38d74/
SH256 hash:
e712bcd56fe64742c0f674f3acff83490f8103c260ea3389f56151b5066b7cd3
MD5 hash:
7bad4197d1ae020c9049a782eb9a71d2
SHA1 hash:
e1253047ea92beb7d161b106765ad8b03bc86b1e
Link:
https://www.unpac.me/results/235dde91-47c8-4f03-aa09-a2a0a2d38d74/
SH256 hash:
066ac4c3eea3cbeb5da1eb5a154e65569a6e526c00d5a8aaab467eaabceeb749
MD5 hash:
068a011b4d7815a7bf3e31876273ecc1
SHA1 hash:
47f89db56d5cd6da0882d38850a08e9743d32829
Link:
https://www.unpac.me/results/235dde91-47c8-4f03-aa09-a2a0a2d38d74/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/da1fce77ce31/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/da1fce77ce31c7d431dc7cb2a3f6c93f829240263cf9bef0c97f613320ad5635

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:DotNet_Reactor
Create hunting rule
Author:@bartblaze
Description:Identifies .NET Reactor, which offers .NET code protection such as obfuscation, encryption and so on.
Rule name:INDICATOR_KB_CERT_7c1118cbbadc95da3752c46e47a27438
Create hunting rule
Author:ditekSHen
Description:Detects executables signed with stolen, revoked or invalid certificates
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:pe_imphash
Create hunting rule
Rule name:PureCrypter
Create hunting rule
Author:@bartblaze
Description:Identifies PureCrypter, .NET loader and obfuscator.
Reference:https://malpedia.caad.fkie.fraunhofer.de/details/win.purecrypter
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

File information

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

Malspam

Formbook

Executable exe da1fce77ce31c7d431dc7cb2a3f6c93f829240263cf9bef0c97f613320ad5635

(this sample)

  
Delivery method
Distributed via e-mail attachment

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 (GUARD_CF)high

Comments