MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 39e4d2034ff07b9ba247022d53f2e8444e2eea2eb94addc571d004f59037e3e2. 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: 13


Intelligence 13 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 39e4d2034ff07b9ba247022d53f2e8444e2eea2eb94addc571d004f59037e3e2
SHA3-384 hash: 52be47af2d343caf9b496d88cfdc4a7563652d9513f40ddab8845ae86dda716e2046e41a9d6bcfcc8fa10399c49c1d05
SHA1 hash: c1d1f098459c989b83fe3e0838a90aa85eae0cc7
MD5 hash: 3dae733afc18d35625ee8d2c2705ab09
humanhash: georgia-sink-freddie-winner
File name:f8yKXi4whKaPo8e.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:724'992 bytes
First seen:2021-08-30 11:55:54 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 6144:3a+T85OuSbw8K3LPQH7s3lWBew9ztOHfQFVk5Ri2nbzwUAXQwaniqeQKbabwh:q+T85OSTWBgHfQFVkPi2b1AKniqe4bw
Threatray 10'785 similar samples on MalwareBazaar
TLSH T10FF42D7F19BDA2279175C6F58BE38827F0108B6F3110696476D347264322A7AB4F336E
Reporter GovCERT_CH
Tags:exe FormBook xloader

Intelligence

File Origin
# of uploads :
1
# of downloads :
195
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
f8yKXi4whKaPo8e.exe
Verdict:
Malicious activity
Analysis date:
2021-08-30 11:58:27 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/632968f7-818a-49cf-ae70-156c225a6063

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/183723/
Detection(s):
SecuriteInfo.com.Artemis3DAE733AFC18.4515.28936.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
DNS request
Sending a UDP request
Unauthorized injection to a recently created process
Creating a file
Launching a process
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/e9f50ee0-7b92-42f0-9999-2b004899fcdb
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/841921
Signature
.NET source code contains potential unpacker
.NET source code contains very large strings
C2 URLs / IPs found in malware configuration
Found malware configuration
Injects a PE file into a foreign processes
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
Self deletion via cmd delete
Sigma detected: Suspicious Svchost Process
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 AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 474353 Sample: f8yKXi4whKaPo8e.exe Startdate: 30/08/2021 Architecture: WINDOWS Score: 100 33 www.brmteam.com 2->33 41 Found malware configuration 2->41 43 Malicious sample detected (through community Yara rule) 2->43 45 Multi AV Scanner detection for submitted file 2->45 47 7 other signatures 2->47 11 f8yKXi4whKaPo8e.exe 3 2->11         started        signatures3 process4 file5 31 C:\Users\user\...\f8yKXi4whKaPo8e.exe.log, ASCII 11->31 dropped 59 Tries to detect virtualization through RDTSC time measurements 11->59 61 Injects a PE file into a foreign processes 11->61 15 f8yKXi4whKaPo8e.exe 11->15         started        signatures6 process7 signatures8 63 Modifies the context of a thread in another process (thread injection) 15->63 65 Maps a DLL or memory area into another process 15->65 67 Sample uses process hollowing technique 15->67 69 Queues an APC in another process (thread injection) 15->69 18 explorer.exe 15->18 injected 22 svchost.exe 15->22         started        process9 dnsIp10 35 dns.zhanh.com 119.28.38.189, 49713, 80 TENCENT-NET-AP-CNTencentBuildingKejizhongyiAvenueCN China 18->35 37 www.zz3ddy.com 18->37 39 10 other IPs or domains 18->39 49 System process connects to network (likely due to code injection or exploit) 18->49 24 explorer.exe 18->24         started        signatures11 process12 signatures13 51 Self deletion via cmd delete 24->51 53 Modifies the context of a thread in another process (thread injection) 24->53 55 Maps a DLL or memory area into another process 24->55 57 Tries to detect virtualization through RDTSC time measurements 24->57 27 cmd.exe 1 24->27         started        process14 process15 29 conhost.exe 27->29         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/39e4d2034ff07b9ba247022d53f2e8444e2eea2eb94addc571d004f59037e3e2/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-08-30 11:56:06 UTC
AV detection:
14 of 28 (50.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=hhsnea2p6b5zxishaiwvh4xiirhc52roxffn3rlr2acplebx4pra._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
0c5e61b415a6ebd50f07b9a3eab5bb7fd6b501715e9f3968c4ea2dbc7323f189
Formbook
112816e3c681b862208badf3069a7108fb356effaeab80d0235b613e653d9da5
Formbook
1575d06ca2a52c1ff60058d6fba43712c2926ecd3f640710ed8f96ec3aaf57da
Formbook
2ae08b5584e30abd315edad1daa90759d442646ade096f38b6534d00f69e811b
Formbook
2ce70c12c5b8806fc6b3e507c5ed406599045b20688b456db124b1b685da60d0
Formbook
2f36f2e2951a2540ab138afc8ac70f8bb37b83f01199434e247aa6716e1eb47a
Formbook
98308710dc37148bf2d9b00829e791e1b2eb92703e1cd80b13e9e1a58d751651
Formbook
c85eab78147f680f396925b005564604d84bcff97fec4bfb27e13071e791d985
Formbook
+ 10'775 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:c8ec loader rat suricata
Link:
https://tria.ge/reports/210830-lnca7jk9ln/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Deletes itself
Xloader Payload
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
Malware Config
C2 Extraction:
http://www.pourheloise.com/c8ec/
Unpacked files
SH256 hash:
4a48a05eb81cac749c6dea42ea3816237bbb8684f0f8d1636b1be2fa65436a64
MD5 hash:
84c057f09100400b8375a193af3ee861
SHA1 hash:
90ade0a4616f4b3924f5a0d2d61c73e0cfc54939
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/21a9843f-74bd-4faf-995e-1628ac61f894/
Parent samples :
98308710dc37148bf2d9b00829e791e1b2eb92703e1cd80b13e9e1a58d751651
2f36f2e2951a2540ab138afc8ac70f8bb37b83f01199434e247aa6716e1eb47a
2ae08b5584e30abd315edad1daa90759d442646ade096f38b6534d00f69e811b
39e4d2034ff07b9ba247022d53f2e8444e2eea2eb94addc571d004f59037e3e2
SH256 hash:
c0ee1071e444f415f8b62856a0896f3b22e563f1bb4f03d14142583efe49a565
MD5 hash:
29db2e114b88ae1f6a00c9aa71690043
SHA1 hash:
ec82db71443556a5b320357b0b8b09e70ec1db9c
Link:
https://www.unpac.me/results/21a9843f-74bd-4faf-995e-1628ac61f894/
SH256 hash:
b855216b03af5d93db5cabaa2c028661596c8e33e40ac4113ae86d9a2eecc9cd
MD5 hash:
bd0cc7ecb10e0ae86ddf1d89523e9927
SHA1 hash:
50501b36c0da60cef6ab2d405dfc3e16be6a5aac
Link:
https://www.unpac.me/results/21a9843f-74bd-4faf-995e-1628ac61f894/
SH256 hash:
39e4d2034ff07b9ba247022d53f2e8444e2eea2eb94addc571d004f59037e3e2
MD5 hash:
3dae733afc18d35625ee8d2c2705ab09
SHA1 hash:
c1d1f098459c989b83fe3e0838a90aa85eae0cc7
Link:
https://www.unpac.me/results/21a9843f-74bd-4faf-995e-1628ac61f894/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/39e4d2034ff0/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.65
Link:
https://yomi.yoroi.company/submissions/39e4d2034ff07b9ba247022d53f2e8444e2eea2eb94addc571d004f59037e3e2

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:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:pe_imphash
Create hunting rule
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

Executable exe 39e4d2034ff07b9ba247022d53f2e8444e2eea2eb94addc571d004f59037e3e2

(this sample)

  
Dropped by
xloader
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/183723/

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