MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 c99761b04708d971b4fbcc26a660d2b86e5f5e27c44f4891c00b1b500029529b. 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: 17
| SHA256 hash: | c99761b04708d971b4fbcc26a660d2b86e5f5e27c44f4891c00b1b500029529b |
|---|---|
| SHA3-384 hash: | 916065fbf84c09fb44153e693bd77d1e3b01b09cb88139756370d900b6bdaa8e542e27dc9b810a95c3504c54ae15f965 |
| SHA1 hash: | e6ba66e58cfd8a280551d8994d01c4c9dd9de06d |
| MD5 hash: | e553c3a0b7af65c849f09c303e18caeb |
| humanhash: | item-arkansas-bravo-hydrogen |
| File name: | PRE-ALERT IOF22-23BLB1399.exe |
| Download: | download sample |
| Signature | Formbook |
| File size: | 880'640 bytes |
| First seen: | 2022-08-04 13:23:44 UTC |
| Last seen: | 2022-08-05 06:33:24 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger) |
| ssdeep | 12288:3AIfKUTYTEeMmt0guWiXxZTyW2MDuuOa73Mrsoc7zUnIac4vZ9b62VuI:QvUTyBGvn2JcYIoc74nIac4vZ9e2 |
| TLSH | T16415BF0137D56618D23A0F7589E2D0708BF3FD2B9935E2EA1DC83E8FB776A048552726 |
| TrID | 64.2% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 11.5% (.SCR) Windows screen saver (13101/52/3) 9.2% (.EXE) Win64 Executable (generic) (10523/12/4) 5.7% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 3.9% (.EXE) Win32 Executable (generic) (4505/5/1) |
| Reporter |  GovCERT_CH |
| Tags: | exe FormBook |
Intelligence
File Origin
# of uploads :
2
# of downloads :
479
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
ID:
1
File name:
PRE-ALERT IOF22-23BLB1399.exe
Verdict:
Malicious activity
Analysis date:
2022-08-04 13:25:55 UTC
Tags:
formbook trojan stealer
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Sending a custom TCP request
Сreating synchronization primitives
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Unauthorized injection to a recently created process
Creating a file
Searching for synchronization primitives
Launching cmd.exe command interpreter
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
5/10
Confidence:
100%
Tags:
packed
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
Verdict:
Malicious
Result
Threat name:
FormBook
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
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 dropped file
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 sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Detection:
formbook
Threat name:
ByteCode-MSIL.Spyware.SnakeLogger
Status:
Malicious
First seen:
2022-08-04 11:43:17 UTC
File Type:
PE (.Net Exe)
Extracted files:
41
AV detection:
23 of 26 (88.46%)
Threat level:
2/5
Detection(s):
Malicious file
Verdict:
malicious
Label(s):
formbook
Result
Malware family:
formbook
Score:
10/10
Tags:
family:formbook campaign:g2i8 rat spyware stealer trojan
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 WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Deletes itself
Blocklisted process makes network request
Formbook payload
Formbook
Unpacked files
SH256 hash:
1064e2d2eab0a80f27579839b00cac7ed17a0df9d1060ef0698630821bdc878e
MD5 hash:
6993ca72aaac824af1dc931066ab3a7e
SHA1 hash:
5313f3e955515013707f9ddfacf944f830f5851b
Detections:
win_formbook_g0
win_formbook_auto
FormBook
SH256 hash:
5e97ccd8dafcb36b3cb772f6a2fd425abcf221ab9ea1930e8c2618c95332f2c6
MD5 hash:
01800f6b045def8d90c649842f56d752
SHA1 hash:
f8434a4636d0772d01aac44bb3f9753a41f01d34
SH256 hash:
b9dc4ec68f9d7468020f4c679ee2f3464c9bdb6e11ab615ba218a70f4be66d40
MD5 hash:
b57db4e4b2e585128c7f3d69804a660b
SHA1 hash:
8c2778f7f7d082e9aa9ada16f0d9af5f8a99e878
SH256 hash:
c99761b04708d971b4fbcc26a660d2b86e5f5e27c44f4891c00b1b500029529b
MD5 hash:
e553c3a0b7af65c849f09c303e18caeb
SHA1 hash:
e6ba66e58cfd8a280551d8994d01c4c9dd9de06d
Malware family:
FormBook
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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: | malware_Formbook_strings |
|---|---|
| Author: | JPCERT/CC Incident Response Group |
| Description: | detect Formbook in memory |
| Reference: | internal research |
| Rule name: | meth_get_eip |
|---|---|
| Author: | Willi Ballenthin |
| Rule name: | meth_stackstrings |
|---|---|
| Author: | Willi Ballenthin |
| Rule name: | pe_imphash |
|---|
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| Rule name: | win_formbook_auto |
|---|---|
| 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
Dropped by
formbook
Delivery method
Distributed via e-mail attachment
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