MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c8517f6c638a7d458d5dc46ba0c8b62c22165996339338788f9632cba03570c5. 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 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c8517f6c638a7d458d5dc46ba0c8b62c22165996339338788f9632cba03570c5
SHA3-384 hash: b5b1668a4411f7ba1ecb37e264a6fbfd956178f78be5dcd6f8aa6f699d9157ca0f82cf5218c24463bb7d9527895e9449
SHA1 hash: 66f71f1f920899aaffe32f996f25df8c031cbd8a
MD5 hash: 071d5dc67ed8f6be856d7f23d77382fc
humanhash: hawaii-mississippi-bulldog-saturn
File name:71084394.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:348'314 bytes
First seen:2022-12-08 08:40:02 UTC
Last seen:2022-12-16 12:50:10 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 97318da386948415d08cef4a9006d669 (71 x Formbook, 35 x SnakeKeylogger, 26 x AgentTesla)
ssdeep 6144:9kwu1ri9AcbfpzRnOa4YS+UYzzrgezsk4VUIE6Xfjh8o/Y7qAKTFtsY7eREBOd:61riiODTUU1AUIE6XfT/CKRmfeBOd
TLSH T16474235676E5DCB7E5E206325F671BFC92F2D28402B2FEC71B643B2A51069C1D888683
TrID 92.7% (.EXE) NSIS - Nullsoft Scriptable Install System (846567/2/133)
3.4% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
1.1% (.EXE) Win64 Executable (generic) (10523/12/4)
0.7% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
0.5% (.EXE) Win16 NE executable (generic) (5038/12/1)
File icon (PE):PE icon
dhash icon b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
6
# of downloads :
177
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
71084394.exe
Verdict:
Malicious activity
Analysis date:
2022-12-08 08:42:52 UTC
Tags:
installer formbook xloader trojan stealer
Link:
https://app.any.run/tasks/f67f4832-997b-466c-b904-aeb7e665453c

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/344223/
Detection(s):
SecuriteInfo.com.FileRepMalware.9653.2564.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a file in the %AppData% subdirectories
Сreating synchronization primitives
Launching a process
Searching for synchronization primitives
Sending a custom TCP request
DNS request
Sending an HTTP GET request
Reading critical registry keys
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process by context flags manipulation
Stealing user critical data
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/6391a2e604e0e79bdf41738c/reports/f12934ad-b75c-408b-af1b-711445526448/overview
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.
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/9cc9336c-4a7c-4e0f-8fa0-e8118dd20794
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1130540
Signature
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
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)
Multi AV Scanner detection for dropped file
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
System process connects to network (likely due to code injection or exploit)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses netsh to modify the Windows network and firewall settings
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 763264 Sample: 71084394.exe Startdate: 08/12/2022 Architecture: WINDOWS Score: 100 40 www.kmuregister.com 2->40 54 Snort IDS alert for network traffic 2->54 56 Malicious sample detected (through community Yara rule) 2->56 58 Antivirus detection for URL or domain 2->58 60 4 other signatures 2->60 11 71084394.exe 19 2->11         started        signatures3 process4 file5 36 C:\Users\user\AppData\Local\...\cwjtwgru.exe, PE32 11->36 dropped 14 cwjtwgru.exe 1 2 11->14         started        process6 file7 38 C:\Users\user\AppData\Roaming\...\gqbi.exe, PE32 14->38 dropped 80 Antivirus detection for dropped file 14->80 82 Multi AV Scanner detection for dropped file 14->82 84 Machine Learning detection for dropped file 14->84 86 2 other signatures 14->86 18 cwjtwgru.exe 14->18         started        signatures8 process9 signatures10 46 Modifies the context of a thread in another process (thread injection) 18->46 48 Maps a DLL or memory area into another process 18->48 50 Sample uses process hollowing technique 18->50 52 Queues an APC in another process (thread injection) 18->52 21 explorer.exe 18->21 injected process11 dnsIp12 42 www.estacatemucocautin.com 154.210.53.58, 49709, 80 ITACE-AS-APItaceInternationalLimitedHK Seychelles 21->42 44 www.doctorbodymake.com 118.27.125.194, 49710, 49711, 49712 INTERQGMOInternetIncJP Japan 21->44 62 System process connects to network (likely due to code injection or exploit) 21->62 64 Uses netsh to modify the Windows network and firewall settings 21->64 25 netsh.exe 13 21->25         started        28 gqbi.exe 21->28         started        30 gqbi.exe 21->30         started        signatures13 process14 signatures15 66 Tries to steal Mail credentials (via file / registry access) 25->66 68 Tries to harvest and steal browser information (history, passwords, etc) 25->68 70 Modifies the context of a thread in another process (thread injection) 25->70 72 Maps a DLL or memory area into another process 25->72 74 Antivirus detection for dropped file 28->74 76 Multi AV Scanner detection for dropped file 28->76 78 Machine Learning detection for dropped file 28->78 32 WerFault.exe 4 10 28->32         started        34 WerFault.exe 10 30->34         started        process16
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c8517f6c638a7d458d5dc46ba0c8b62c22165996339338788f9632cba03570c5/
Threat name:
Win32.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2022-12-08 08:01:54 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
21 of 26 (80.77%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=zbix63ddrj6uldk5yrv2bsfwfqrbmwmwgojtq6epsyzmxibvodcq._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:yurm persistence rat spyware stealer trojan
Link:
https://tria.ge/reports/221208-kkww5shd74/
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Checks computer location settings
Loads dropped DLL
Reads user/profile data of web browsers
Blocklisted process makes network request
Executes dropped EXE
Formbook
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/e07db88e-c03a-416c-8472-1bdec1008cb4
Unpacked files
SH256 hash:
a64d6cec14a507ac13efa67684d55a1b2c2b30b1acc9b0b2e06eed97a3f6329c
MD5 hash:
595b6378caa8d5b8223cc7e47a5ca1b8
SHA1 hash:
613c526519e3aad1415143477e62e5e948c4fe2f
Detections:
XLoader
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/06b06edb-a587-4690-a3fd-1a2f188b00dc/
Parent samples :
c3c11e1f637197df1250683c58f3e31d7602e2b540d5ac674d7ab03f214f685f
67bdb5802b7b2a279b9bc414db04e65955052318b15ff51eda8855efd5b235b9
6a7b8ed7f2cfe7f8a3030df54f1ba443025c54e5a15d416469aac2a696d7bf1d
34ba86fe0e8ed621b916cf851855cd2c616af85a19534bfc25b5806ca43cbb58
c8517f6c638a7d458d5dc46ba0c8b62c22165996339338788f9632cba03570c5
0d65bd3f562fa127be5f009203fed5b0da090648f61d10d03ded5c89228e3766
8cb7736a5f9c3be642d8ee0f07f7a293e210a7bc74cbbc9ba89e483ff22634cb
8c87fd5bc9ad02c4af8718cdb2ec85119ab3af33fd4d47de448f577d09bfe031
06724c588f5b9381effa96ca72ae6c136b6ec64ae1e898942d34142e40078bab
80a92f2ceb76a9e3f2a5405c1d2d26f838d54b5129d1ce97d60c4af88c07dc61
75fe4b601dac47a21ea34b057b8c2ee8623db40d6fbb6e3398b77260ed38eabf
ab72cb8573b9eac92ecf32c889a727552d386a5d31cb5daa249d430258e1e855
8f2f6e6735e483a6d8c6aac9817f9bf908e7e63f60a552bb64f8ca77d6c38d0e
eb1d91b9024ca6b6c1990f329d871179ba0a2a0f677095666e081c62e3427020
SH256 hash:
d72636b688f1516d95c5f4284e7bb48b4cdbb84be29602256352eb9bcd201b16
MD5 hash:
67ab1a1d4928f5ad3fa5da8d62da9526
SHA1 hash:
5065f154f716e6938d9364437f91ca8190d74571
Link:
https://www.unpac.me/results/06b06edb-a587-4690-a3fd-1a2f188b00dc/
SH256 hash:
316c81cfa98c98dfd17b2ab7f2631c712604a85263861d7d7fd658731cbabdd1
MD5 hash:
96636617b928f90dbd877b5fd2246a71
SHA1 hash:
fd81c03611029a9153c22e9828f62fb2f9af4139
Link:
https://www.unpac.me/results/06b06edb-a587-4690-a3fd-1a2f188b00dc/
SH256 hash:
c8517f6c638a7d458d5dc46ba0c8b62c22165996339338788f9632cba03570c5
MD5 hash:
071d5dc67ed8f6be856d7f23d77382fc
SHA1 hash:
66f71f1f920899aaffe32f996f25df8c031cbd8a
Link:
https://www.unpac.me/results/06b06edb-a587-4690-a3fd-1a2f188b00dc/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c8517f6c638a/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.63
Link:
https://yomi.yoroi.company/submissions/c8517f6c638a7d458d5dc46ba0c8b62c22165996339338788f9632cba03570c5

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:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:Windows_Trojan_Formbook
Create hunting rule
Author:@malgamy12
Rule name:Windows_Trojan_Formbook_1112e116
Create hunting rule
Author:Elastic Security
Rule name:win_formbook_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.formbook.

File information

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

Malspam

Formbook

zip f4d737ac425a1c0bb32aa1d8d33a7cdfbcaf497af59257428e6433af20630e97

Formbook

Executable exe c8517f6c638a7d458d5dc46ba0c8b62c22165996339338788f9632cba03570c5

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/344223/
  
Dropped by
SHA256 f4d737ac425a1c0bb32aa1d8d33a7cdfbcaf497af59257428e6433af20630e97
  
Dropped by
MD5 b3e83d8057646cfb9e26e506c9db1591

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