MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ac4d23b56b2aac65756dafc7d6ff505ba986f40410370ca4c094f0530e399d79. 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: 10


Intelligence 10 IOCs YARA 2 File information Comments
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SHA256 hash: ac4d23b56b2aac65756dafc7d6ff505ba986f40410370ca4c094f0530e399d79
SHA3-384 hash: 6a7de67cc4e68f9d57f9ad00a3afff59d47b969d080e2e19634a4575823597b36c1b3c1b60af21dea91b5a7b59686cf2
SHA1 hash: 1fa9928211033fd8afadc910e5acbd608d2686d1
MD5 hash: f085c3358b59f0f7233e460816b9cffd
humanhash: zulu-gee-friend-ceiling
File name:REVISED INVOICE DETAILS.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'306'624 bytes
First seen:2021-07-26 11:04:41 UTC
Last seen:2021-08-10 09:27:33 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'653 x AgentTesla, 19'464 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 24576:WcOsBgo0q4wMfBmCmTOUd+L6kkXWx92kglmR4SmXP:WloHMpmCm6Ud+zkXn64SmX
Threatray 7'003 similar samples on MalwareBazaar
TLSH T1CC55BFB1091DEF22F4B706BD7862561442B48D46C5AFCB68FE7332ABC970FC23456A91
dhash icon f0c4e86969e8d4f0 (9 x Formbook, 4 x SnakeKeylogger, 3 x AgentTesla)
Reporter cocaman
Tags:exe FormBook INVOICE

Intelligence

File Origin
# of uploads :
3
# of downloads :
104
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/174098/
Detection(s):
SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.8541.4868.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
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 process with a hidden window
Deleting a recently created file
Unauthorized injection to a recently created process
Creating a file
Launching cmd.exe command interpreter
Forced shutdown of a system process
Enabling autorun by creating a file
Unauthorized injection to a system process
Result
Verdict:
UNKNOWN
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/68f0ba2d-dc45-46a5-a402-39b6638ed6c2
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/821718
Signature
C2 URLs / IPs found in malware configuration
Found malware configuration
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
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)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 454130 Sample: REVISED INVOICE DETAILS.exe Startdate: 26/07/2021 Architecture: WINDOWS Score: 100 43 www.pgpitagi.com 2->43 45 www25.wixdns.net 2->45 47 3 other IPs or domains 2->47 55 Found malware configuration 2->55 57 Malicious sample detected (through community Yara rule) 2->57 59 Multi AV Scanner detection for submitted file 2->59 61 8 other signatures 2->61 11 REVISED INVOICE DETAILS.exe 7 2->11         started        signatures3 process4 file5 35 C:\Users\user\AppData\Roaming\dONWcNjO.exe, PE32 11->35 dropped 37 C:\Users\...\dONWcNjO.exe:Zone.Identifier, ASCII 11->37 dropped 39 C:\Users\user\AppData\Local\...\tmp39E9.tmp, XML 11->39 dropped 41 C:\Users\...\REVISED INVOICE DETAILS.exe.log, ASCII 11->41 dropped 71 Injects a PE file into a foreign processes 11->71 15 REVISED INVOICE DETAILS.exe 11->15         started        18 schtasks.exe 1 11->18         started        signatures6 process7 signatures8 73 Modifies the context of a thread in another process (thread injection) 15->73 75 Maps a DLL or memory area into another process 15->75 77 Sample uses process hollowing technique 15->77 79 Queues an APC in another process (thread injection) 15->79 20 explorer.exe 15->20 injected 24 conhost.exe 18->24         started        process9 dnsIp10 49 titpervert.com 68.238.57.241, 49773, 80 CTELCOUS United States 20->49 51 www.indiawalimaadrama.com 104.21.69.74, 49770, 80 CLOUDFLARENETUS United States 20->51 53 www.titpervert.com 20->53 63 System process connects to network (likely due to code injection or exploit) 20->63 26 cscript.exe 20->26         started        29 autofmt.exe 20->29         started        signatures11 process12 signatures13 65 Modifies the context of a thread in another process (thread injection) 26->65 67 Maps a DLL or memory area into another process 26->67 69 Tries to detect virtualization through RDTSC time measurements 26->69 31 cmd.exe 1 26->31         started        process14 process15 33 conhost.exe 31->33         started       
Gathering data
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
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Status:
Malicious
First seen:
2021-07-26 11:05:07 UTC
File Type:
PE (.Net Exe)
Extracted files:
58
AV detection:
18 of 28 (64.29%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=vrgshnllfkwgk5lnv7d5n72qlouyn5aeca3qzjgastyfgdrztv4q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
2ed038df20b8f41a844651ed1c2cdca2ccabac5b7a946ac06a0892f641481973
Formbook
3aaa7c7c8d2fd8bba13c2a6a51dc70ec8e95cb1af76d474454b19d45ad414f4d
Formbook
3da43dfd3613eeaf2ed56f10624f2dabdb80948c842c98fd0e26688fe55728a7
Formbook
612978b3f26f015bba90e038b5fff1fd337818713e639dfd292e72d3109bc931
Formbook
6b93224c145b221ac786bf10b1471af61722e45bbd41a029789170ea7f1c0751
Formbook
8aabfb2b5aeee025f4a6d963c8761011efb74797e37ee89fd37ae5c23f7f2945
Formbook
9fadae8c6a192536c41677546bc32e530d38084906e8be610573538f0955c49d
Formbook
caae480439293c7be6bb9ca27621f5b99c7391d6b7fddc179d5f5627c6144d08
Formbook
de0011128191babcbdb339d2ab7f9568e0b12c5ebc00a99c235fea849885b6a1
Formbook
dfca1bf3a2bc630e60ee036b0fd5be55b2f2b44e7dc8d2005b86d763bfc7c8ac
Formbook
+ 6'993 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/210726-layc6lre9n/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Deletes itself
CustAttr .NET packer
Formbook Payload
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
Malware Config
C2 Extraction:
http://www.fabricwarehousebrla.com/mjf5/
Unpacked files
SH256 hash:
687a2ac1ccda161bbb4c669880d72acffa2a950833ae53834ba1bb32de2b4c8a
MD5 hash:
a948ee8c46dbfe097f510355ba5d0944
SHA1 hash:
8774e6de3760585df767f8086054c50c6b28ccd1
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/39e2565d-6aa4-4d2b-ae29-4a634ec82852/
Parent samples :
2ed038df20b8f41a844651ed1c2cdca2ccabac5b7a946ac06a0892f641481973
ac4d23b56b2aac65756dafc7d6ff505ba986f40410370ca4c094f0530e399d79
35a2017af959b6e43cb129fc6c18c7e21bc0a1d850b1e74101bbb95d8c5bd3c0
SH256 hash:
9fa2ae20e20c814f6a18cf2ae8ee9c313ac0664dc79900fb7a7383501bd80aac
MD5 hash:
f5bac137f952f7600d43ed6ff90c49c5
SHA1 hash:
f8a92929637c3fe3359317d118dcb830beab8fc3
Link:
https://www.unpac.me/results/39e2565d-6aa4-4d2b-ae29-4a634ec82852/
SH256 hash:
97d2fa1d01b2f9a2199896e05e0cf60c14a9f41ef2d72e15fbb862b7afa08438
MD5 hash:
68463851c0e6fe7a254c99fae763d454
SHA1 hash:
4587a5371d88c296a0184fe47ee0c5245b187127
Link:
https://www.unpac.me/results/39e2565d-6aa4-4d2b-ae29-4a634ec82852/
SH256 hash:
d8f55786cd509a5c560a50607aa6571e354e333c62dcd9d93a2020f9d4461458
MD5 hash:
dc274f5329b6c9c600ae89fa1179a125
SHA1 hash:
23acce1312e7acf7371a08e9a29e60c4a1c8adad
Link:
https://www.unpac.me/results/39e2565d-6aa4-4d2b-ae29-4a634ec82852/
SH256 hash:
ac4d23b56b2aac65756dafc7d6ff505ba986f40410370ca4c094f0530e399d79
MD5 hash:
f085c3358b59f0f7233e460816b9cffd
SHA1 hash:
1fa9928211033fd8afadc910e5acbd608d2686d1
Link:
https://www.unpac.me/results/39e2565d-6aa4-4d2b-ae29-4a634ec82852/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.51
Link:
https://yomi.yoroi.company/submissions/ac4d23b56b2aac65756dafc7d6ff505ba986f40410370ca4c094f0530e399d79

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: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.

Malspam

Formbook

rar 2da40a3eddfabf08bbf581329e88f79f4038e38edf8fbc7ce0f45d0ba9499a71

Formbook

Executable exe ac4d23b56b2aac65756dafc7d6ff505ba986f40410370ca4c094f0530e399d79

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 2da40a3eddfabf08bbf581329e88f79f4038e38edf8fbc7ce0f45d0ba9499a71
Cape
Cape
https://www.capesandbox.com/analysis/174098/

Comments