MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b8393904a1a29cd147d934194b13fd0565dfd123b3868126386437536f15a0b4. 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: 14


Intelligence 14 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b8393904a1a29cd147d934194b13fd0565dfd123b3868126386437536f15a0b4
SHA3-384 hash: ba6d3140b888dca8db2f2eca5f922a99ec662a9822ace132f5b08422abc6a1e12130a83c768948883d08ea828f20cb4f
SHA1 hash: 0684826a2e9c03e255c21933b3fa5e7511f749b5
MD5 hash: 25250537e4562d09ae6522e88483dedc
humanhash: west-beer-ten-green
File name:remiittance_pdf_____________________.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:420'352 bytes
First seen:2021-10-06 12:31:44 UTC
Last seen:2021-10-07 18:37:03 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'607 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 6144:JjkI/uQ+3HwOCodnKo+jws+3La7R7BvwugESDMAPGYgrOCzppxyFz5i1vh:loCodnKo+j4ba7Rqu5SQAPBRCMt5i
Threatray 9'924 similar samples on MalwareBazaar
TLSH T18094F19862AB4B9EDD3887F56400F1A05BFA942F216DC3345DC5A0FE2562F706BD0E93
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
237
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
remiittance_pdf_____________________.exe
Verdict:
Suspicious activity
Analysis date:
2021-10-06 12:32:40 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/cda042ca-bc74-4ec4-b859-9e036ba277cb

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/195461/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.935-1.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching a process
Creating a file in the %temp% directory
Delayed writing of the file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/615d9744b95458900cdd2673/reports/8ef8b653-087f-45ca-91c8-3ed6e6791c03/overview
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/3bc058f5-3795-4539-b5ad-bddee3c05593
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
96 / 100
Link:
https://www.joesandbox.com/analysis/865552
Signature
C2 URLs / IPs found in malware configuration
Found malware configuration
Initial sample is a PE file and has a suspicious name
Malicious sample detected (through community Yara rule)
Sigma detected: Suspicious Double Extension
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
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b8393904a1a29cd147d934194b13fd0565dfd123b3868126386437536f15a0b4/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-10-06 12:32:05 UTC
AV detection:
23 of 45 (51.11%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xa4tsbfbukoncr6zgqmuwe75avs57ujdwodicjrymq3vg3yvuc2a._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
05cc84b514af3890b82bbb8645e6f2ffd63782852f7ec8f00632cae804e7b443
Formbook
12f92a7d8e9599c69253c73bcf26dd3a1f8887fc397b71c408d9a0ddc22fb520
Formbook
137bbdb0a6a00a9167dff5cb670ec17aab82ae50392e12b1cdb6a08110d75285
Formbook
17b08e4418f813543e91ad18ae2e50ecfe40692d9b5dec854e94ec0abbc92b11
Formbook
57c14f3c817855d5ba2bfabaade5929697472d2989a8a9bcff46e50ac499a4dc
Formbook
5da4f819e28c2b5e768a01c4c5010f0a335a86120ddb412583a2cd716bf95356
Formbook
ae33000cbdc7cc10a8d86ce07727c8159d66a6707e2a453d996dc61c709de96f
Formbook
c8b5ad6ec571b93bce7b6ae25501d622eb7fda462b02455ff7bd9aaaace29aef
Formbook
e8baf97ad51faed006287d1f01f921df0f677d4f056d35697158d30aa24ace9b
Formbook
+ 9'914 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:ajki rat spyware stealer trojan
Link:
https://tria.ge/reports/211006-pql2cabah4/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.midwestamericanwoman.com/ajki/
Unpacked files
SH256 hash:
a8fedbd8c8a0b308afd57bc4f591019b80826b11ccf9bccbf0fb88bdde0d359c
MD5 hash:
f948d27d8c6a18aee0db5748db6c8068
SHA1 hash:
94aa66929acbd9268a80cac53fd89000e46d8f9b
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/399acdc1-0656-4b80-b5fc-985d2bca1a21/
Parent samples :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 hash:
0d6bc0eeda6e04fb38ad31a066210612b55840203293b999378cc99b15a87f50
MD5 hash:
4fb9ff0da2fa1869e3d4fdd5858023e7
SHA1 hash:
7999d029997aadf8307bbed7482aa81bf73a6ca8
Link:
https://www.unpac.me/results/399acdc1-0656-4b80-b5fc-985d2bca1a21/
SH256 hash:
fe8637d821a39a8b74abce7e043007d38cb9c5cfcb7098af9846cfd98185ac03
MD5 hash:
c380b6831f456ac5cac08c78c0e4dada
SHA1 hash:
3e241a0b9d96c1dfbadd7ee1a8c5ee6d74eba11c
Link:
https://www.unpac.me/results/399acdc1-0656-4b80-b5fc-985d2bca1a21/
SH256 hash:
b8393904a1a29cd147d934194b13fd0565dfd123b3868126386437536f15a0b4
MD5 hash:
25250537e4562d09ae6522e88483dedc
SHA1 hash:
0684826a2e9c03e255c21933b3fa5e7511f749b5
Link:
https://www.unpac.me/results/399acdc1-0656-4b80-b5fc-985d2bca1a21/
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/b8393904a1a29cd147d934194b13fd0565dfd123b3868126386437536f15a0b4

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 b8393904a1a29cd147d934194b13fd0565dfd123b3868126386437536f15a0b4

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/195461/

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