formbook | 14afee34b6a36a32b34c61556e46fef92e6a2d9066c758308bb9caea4a94ae2a

Analysis

max time kernel
151s
max time network
152s
platform
windows10-1703_x64
resource
win10-20220901-en
resource tags

arch:x64arch:x86image:win10-20220901-enlocale:en-usos:windows10-1703-x64system
submitted
06-12-2022 06:24

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General

Target

14afee34b6a36a32b34c61556e46fef92e6a2d9066c758308bb9caea4a94ae2a.exe
Size

343KB
MD5

0870a4727fcd6ce557f017f0fed61f51
SHA1

6ad1abe4d5d4f44ea753fb10df927adb1f139f2e
SHA256

14afee34b6a36a32b34c61556e46fef92e6a2d9066c758308bb9caea4a94ae2a
SHA512

7a97ad7ab0f0f23883ca3ee33fdf5ecca2ee3d28df3295ba3b1f1a04b71c62c7dbb7c3bc41d13ac7a84e286b41d130ef4e07a9ad79e7146e9f44baca513a03c5
SSDEEP

6144:ZBnbr9ZL8bM0rCfO4AFSnQNYnx3b+/wmsqplIQ037:HfL8bM9fz8SnQyRWwmxsQg

Score

10^/10

formbook f4ca rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

f4ca

Decoy

omFHB5ajfJi1UEIEV9XcoRw=

UBjJkmQPyprdhcFF/bdCWQ==

evGKkBUj1je+otcfpw==

KgvGVeOATSt3nug0BIOm2JvOQycB

Lv6o3K0r9aSjI0lr9fg1txw=

LH1jJb/HieQpsEdqWCQTvX2PmsDVIeg=

99dte0XauJfk6Xv+uQxJFgA1gMktBA==

21FkkGB9gMniDQw2ffu6

r4lKBM/q6TZwVZfS

F+14qHeVWi56KdQ=

BgWXRsVoICMvvQ==

I+EozFl0Uy56KdQ=

xoXCgEllKEbWfjFCCLo=

qo9G1lXvvGt5GkxrLQWw

ORNlYic0PJ2ip4geEFSv

Yj+GFpvFxy0uVYx1fLI/XQ==

XL+veIKPjOTe4fjvFs+n

D2JKVAfuakXCAyoEvw==

voWJU81tH56wvt/vImbCcgVd

dVEcwFrmb8bZ4vXvFs+n

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Executes dropped EXE 2 IoCs

Processes:

vjfiz.exevjfiz.exe

pid process

3480 vjfiz.exe
1308 vjfiz.exe
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

vjfiz.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2368682536-4045190062-1465778271-1000\Control Panel\International\Geo\Nation vjfiz.exe

pid	process
3480	vjfiz.exe
1308	vjfiz.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2368682536-4045190062-1465778271-1000\Control Panel\International\Geo\Nation	vjfiz.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

vjfiz.exevjfiz.exechkdsk.exe

description	pid	process	target process
PID 3480 set thread context of 1308	3480	vjfiz.exe	vjfiz.exe
PID 1308 set thread context of 3044	1308	vjfiz.exe	Explorer.EXE
PID 516 set thread context of 3044	516	chkdsk.exe	Explorer.EXE

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

chkdsk.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier chkdsk.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

chkdsk.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2368682536-4045190062-1465778271-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 60 IoCs

Processes:

vjfiz.exechkdsk.exe

pid	process
1308	vjfiz.exe
1308	vjfiz.exe
1308	vjfiz.exe
1308	vjfiz.exe
1308	vjfiz.exe
1308	vjfiz.exe
1308	vjfiz.exe
1308	vjfiz.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3044 Explorer.EXE
Suspicious behavior: MapViewOfSection 9 IoCs

Processes:

vjfiz.exevjfiz.exechkdsk.exe

pid process

3480 vjfiz.exe
3480 vjfiz.exe
1308 vjfiz.exe
1308 vjfiz.exe
1308 vjfiz.exe
516 chkdsk.exe
516 chkdsk.exe
516 chkdsk.exe
516 chkdsk.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

vjfiz.exechkdsk.exe

description pid process

Token: SeDebugPrivilege 1308 vjfiz.exe
Token: SeDebugPrivilege 516 chkdsk.exe

pid	process
3044	Explorer.EXE

pid	process
3480	vjfiz.exe
3480	vjfiz.exe
1308	vjfiz.exe
1308	vjfiz.exe
1308	vjfiz.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe
516	chkdsk.exe

description	pid	process
Token: SeDebugPrivilege	1308	vjfiz.exe
Token: SeDebugPrivilege	516	chkdsk.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

14afee34b6a36a32b34c61556e46fef92e6a2d9066c758308bb9caea4a94ae2a.exevjfiz.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 2696 wrote to memory of 3480	2696	14afee34b6a36a32b34c61556e46fef92e6a2d9066c758308bb9caea4a94ae2a.exe	vjfiz.exe
PID 2696 wrote to memory of 3480	2696	14afee34b6a36a32b34c61556e46fef92e6a2d9066c758308bb9caea4a94ae2a.exe	vjfiz.exe
PID 2696 wrote to memory of 3480	2696	14afee34b6a36a32b34c61556e46fef92e6a2d9066c758308bb9caea4a94ae2a.exe	vjfiz.exe
PID 3480 wrote to memory of 1308	3480	vjfiz.exe	vjfiz.exe
PID 3480 wrote to memory of 1308	3480	vjfiz.exe	vjfiz.exe
PID 3480 wrote to memory of 1308	3480	vjfiz.exe	vjfiz.exe
PID 3480 wrote to memory of 1308	3480	vjfiz.exe	vjfiz.exe
PID 3044 wrote to memory of 516	3044	Explorer.EXE	chkdsk.exe
PID 3044 wrote to memory of 516	3044	Explorer.EXE	chkdsk.exe
PID 3044 wrote to memory of 516	3044	Explorer.EXE	chkdsk.exe
PID 516 wrote to memory of 4724	516	chkdsk.exe	Firefox.exe
PID 516 wrote to memory of 4724	516	chkdsk.exe	Firefox.exe
PID 516 wrote to memory of 4724	516	chkdsk.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3044

C:\Users\Admin\AppData\Local\Temp\14afee34b6a36a32b34c61556e46fef92e6a2d9066c758308bb9caea4a94ae2a.exe
"C:\Users\Admin\AppData\Local\Temp\14afee34b6a36a32b34c61556e46fef92e6a2d9066c758308bb9caea4a94ae2a.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:2696

C:\Users\Admin\AppData\Local\Temp\vjfiz.exe
"C:\Users\Admin\AppData\Local\Temp\vjfiz.exe" C:\Users\Admin\AppData\Local\Temp\tysrzemvxjx.lq
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3480

C:\Users\Admin\AppData\Local\Temp\vjfiz.exe
"C:\Users\Admin\AppData\Local\Temp\vjfiz.exe"
4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1308

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Suspicious use of SetThreadContext
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:516

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:4724

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\dvicdpxumc.gsh
Filesize
185KB

MD5
6bff3f9f5f10ca6c482120d288b62b08

SHA1
e6e72efca642290d5daaf4c8b2fe5a759e1eadd7

SHA256
499c77843bfd10fce945eab5d76cd783cd1f21aba38a1f36f854825d1f2083da

SHA512
ba7dd6f593bca04792711c46f22137841efc1663aee27c8bc1fe99bc057b5475ef9240880e2a391eed5e99f59142fb49d3d35d8fc558e096127c601ece4f1d2a

Download Submit
C:\Users\Admin\AppData\Local\Temp\tysrzemvxjx.lq
Filesize
5KB

MD5
36cf5f2a5ec6b153ee2c785c517153fa

SHA1
21fb70c9c27ea827abd77d7adfef003acc7b1b03

SHA256
84a0d75969da88bc18370ded6588bca0d05525a24bc472c1c84bade9fc1c0479

SHA512
d80a2cd1c4d0f86c64e06b728f99a8dee2239f2f0652cc88b0cd02ee28fda16309b3b7cb70b5254821fcec4b6bee640a431f08986faae8f8173b09cee3c09521

Download Submit
C:\Users\Admin\AppData\Local\Temp\vjfiz.exe
Filesize
12KB

MD5
5d2a199396a0bd5027f1d471210eb446

SHA1
3237dea6926772be66227d29a9b361305734af5a

SHA256
ad6a085a27238c1122dfeead4feb7085a04da98ff6805dda8a816d099e46ae97

SHA512
899bc54811858e79d64b1146f37208eee74455fa976e65f83c131ed65eb71a609f32fbeccc2de21328dbbcc100f7749520464b550ce65d278254ff6446b37e73

Download Submit
C:\Users\Admin\AppData\Local\Temp\vjfiz.exe
Filesize
12KB

MD5
5d2a199396a0bd5027f1d471210eb446

SHA1
3237dea6926772be66227d29a9b361305734af5a

SHA256
ad6a085a27238c1122dfeead4feb7085a04da98ff6805dda8a816d099e46ae97

SHA512
899bc54811858e79d64b1146f37208eee74455fa976e65f83c131ed65eb71a609f32fbeccc2de21328dbbcc100f7749520464b550ce65d278254ff6446b37e73

Download Submit
C:\Users\Admin\AppData\Local\Temp\vjfiz.exe
Filesize
12KB

MD5
5d2a199396a0bd5027f1d471210eb446

SHA1
3237dea6926772be66227d29a9b361305734af5a

SHA256
ad6a085a27238c1122dfeead4feb7085a04da98ff6805dda8a816d099e46ae97

SHA512
899bc54811858e79d64b1146f37208eee74455fa976e65f83c131ed65eb71a609f32fbeccc2de21328dbbcc100f7749520464b550ce65d278254ff6446b37e73

Download Submit
memory/516-250-0x0000000004EF0000-0x0000000004F1D000-memory.dmp

Filesize
180KB

Download
memory/516-255-0x0000000004EF0000-0x0000000004F1D000-memory.dmp

Filesize
180KB

Download
memory/516-251-0x00000000050A0000-0x00000000053C0000-memory.dmp

Filesize
3.1MB

Download
memory/516-263-0x0000000005480000-0x000000000550F000-memory.dmp

Filesize
572KB

Download
memory/516-249-0x0000000000970000-0x000000000097A000-memory.dmp

Filesize
40KB

Download
memory/516-231-0x0000000000000000-mapping.dmp

Download
memory/1308-233-0x0000000000540000-0x000000000056F000-memory.dmp

Filesize
188KB

Download
memory/1308-229-0x0000000000A10000-0x0000000000BAE000-memory.dmp

Filesize
1.6MB

Download
memory/1308-220-0x0000000000E30000-0x0000000001150000-memory.dmp

Filesize
3.1MB

Download
memory/1308-219-0x0000000000540000-0x000000000056F000-memory.dmp

Filesize
188KB

Download
memory/1308-206-0x00000000005412B0-mapping.dmp

Download
memory/2696-157-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-152-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-133-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-134-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-135-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-137-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-136-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-139-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-140-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-138-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-141-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-143-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-142-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-144-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-145-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-146-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-147-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-148-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-149-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-150-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-151-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-130-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-153-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-154-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-156-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-155-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-131-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-158-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-159-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-160-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-129-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-120-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-128-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-132-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-121-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-122-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-123-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-124-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-126-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-125-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/2696-127-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3044-230-0x0000000003010000-0x0000000003128000-memory.dmp

Filesize
1.1MB

Download
memory/3044-264-0x0000000006840000-0x00000000069AA000-memory.dmp

Filesize
1.4MB

Download
memory/3044-265-0x0000000006840000-0x00000000069AA000-memory.dmp

Filesize
1.4MB

Download
memory/3480-166-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-178-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-180-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-183-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-185-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-186-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-184-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-161-0x0000000000000000-mapping.dmp

Download
memory/3480-165-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-171-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-175-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-177-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-176-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-173-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-174-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-172-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-170-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-168-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-167-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-164-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-163-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-182-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-181-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download
memory/3480-179-0x0000000077890000-0x0000000077A1E000-memory.dmp

Filesize
1.6MB

Download