MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a21da47756a5b8a820ac633dcc6902b2ca4b9dd0861741f8f68153e5c436bda5. 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: 12


Intelligence 12 IOCs YARA File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a21da47756a5b8a820ac633dcc6902b2ca4b9dd0861741f8f68153e5c436bda5
SHA3-384 hash: 457064732ae49f6624e19ab847a6989d351f550b94136ecd927d90eb49515861dad6a42e374d0c24e2af56c724c19a19
SHA1 hash: 87ccb2e2cf10e5beab77711ef2ddc025430e3151
MD5 hash: 4f322138c86416ce5503ff3c49cb4f01
humanhash: mobile-sink-two-comet
File name:4f322138c86416ce5503ff3c49cb4f01.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:749'056 bytes
First seen:2021-01-12 07:08:36 UTC
Last seen:2021-01-12 08:55:24 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'461 x Formbook, 12'202 x SnakeKeylogger)
ssdeep 12288:lYDVv8WUE47rAxWqX4CA9WOFT1XrFy4TsjZlR3IEIz1M:lYBJUJgBtAr1X44yoM
TLSH 63F4CF0461BC6FF2EA3E83F4264A960543FD3A5F64ADE1B40CD134DB22A6F894615BC7
Reporter abuse_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
120
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Arrival notice.xlsx
Verdict:
Malicious activity
Analysis date:
2021-01-12 06:17:01 UTC
Tags:
encrypted opendir exploit CVE-2017-11882 loader trojan formbook stealer
Link:
https://app.any.run/tasks/e3035fee-8745-46e5-9fe2-d43c35ac2e34

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/111397/
Detection(s):
SecuriteInfo.com.Trojan.Siggen11.57608.31124.81.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Unauthorized injection to a recently created process
Creating a file
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.
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/578676
Signature
.NET source code contains potential unpacker
Found malware configuration
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
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 submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected AntiVM_3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 338387 Sample: btVnDhh5K7.exe Startdate: 12/01/2021 Architecture: WINDOWS Score: 100 31 www.yqhbcapzy.icu 2->31 39 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->39 41 Found malware configuration 2->41 43 Malicious sample detected (through community Yara rule) 2->43 45 6 other signatures 2->45 11 btVnDhh5K7.exe 3 2->11         started        signatures3 process4 file5 29 C:\Users\user\AppData\...\btVnDhh5K7.exe.log, ASCII 11->29 dropped 55 Tries to detect virtualization through RDTSC time measurements 11->55 15 btVnDhh5K7.exe 11->15         started        signatures6 process7 signatures8 57 Modifies the context of a thread in another process (thread injection) 15->57 59 Maps a DLL or memory area into another process 15->59 61 Sample uses process hollowing technique 15->61 63 Queues an APC in another process (thread injection) 15->63 18 explorer.exe 15->18 injected process9 dnsIp10 33 www.opmania36.com 156.253.109.165, 49746, 49770, 80 XIAOZHIYUN1-AS-APICIDCNETWORKUS Seychelles 18->33 35 www.eggsmission.com 91.195.241.137, 49744, 49750, 49768 SEDO-ASDE Germany 18->35 37 19 other IPs or domains 18->37 47 System process connects to network (likely due to code injection or exploit) 18->47 22 chkdsk.exe 18->22         started        signatures11 process12 signatures13 49 Modifies the context of a thread in another process (thread injection) 22->49 51 Maps a DLL or memory area into another process 22->51 53 Tries to detect virtualization through RDTSC time measurements 22->53 25 cmd.exe 1 22->25         started        process14 process15 27 conhost.exe 25->27         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a21da47756a5b8a820ac633dcc6902b2ca4b9dd0861741f8f68153e5c436bda5/
Threat name:
Win32.Trojan.Bulz
Create hunting rule
Status:
Malicious
First seen:
2021-01-12 07:08:04 UTC
AV detection:
12 of 46 (26.09%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=uio2i52wuw4kqifmmm64y2icwlfexhoqqylud6hwqfj6lrbwxwsq._file
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:formbook family:xloader loader rat spyware stealer trojan
Link:
https://tria.ge/reports/210112-rr13afs77a/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Xloader Payload
Formbook
Xloader
Malware Config
C2 Extraction:
http://www.classifoods.com/oean/
Unpacked files
SH256 hash:
a21da47756a5b8a820ac633dcc6902b2ca4b9dd0861741f8f68153e5c436bda5
MD5 hash:
4f322138c86416ce5503ff3c49cb4f01
SHA1 hash:
87ccb2e2cf10e5beab77711ef2ddc025430e3151
Link:
https://www.unpac.me/results/8229d5a7-3b25-49bc-b4eb-1de57f85e041/
SH256 hash:
94c4b3f644616a8eefbe4952bf945bce5159112a49c60f24cf21831f0a89d9c1
MD5 hash:
6b58cdd5f50a13deca1981fecde07928
SHA1 hash:
2bdb93db75378ef67f401082ce8bf607e64c0ddf
Link:
https://www.unpac.me/results/8229d5a7-3b25-49bc-b4eb-1de57f85e041/
SH256 hash:
64a419709ad219ffc006bda776b650da486d55048d2fa34525f40227da0e5c86
MD5 hash:
88c0ec8398978fa2e4240f02765086ad
SHA1 hash:
5a5c4935b2d70e890c89ad9332365f4f4aa86f3c
Link:
https://www.unpac.me/results/8229d5a7-3b25-49bc-b4eb-1de57f85e041/
SH256 hash:
9150693ac3c1398300577d323097e0fbffd9624986c07ad77657a848bdb58221
MD5 hash:
668d780b83ab14a278561d4abdd2339c
SHA1 hash:
89b92401e32fb4f0fc943c24f6512f028883034a
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/8229d5a7-3b25-49bc-b4eb-1de57f85e041/
Parent samples :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 note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/a21da47756a5b8a820ac633dcc6902b2ca4b9dd0861741f8f68153e5c436bda5

File information

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

Web download

Formbook

Executable exe a21da47756a5b8a820ac633dcc6902b2ca4b9dd0861741f8f68153e5c436bda5

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/952192/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/111397/

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