formbook | 14afee34b6a36a32b34c61556e46fef92e6a2d9066c758308bb9caea4a94ae2a

Analysis

max time kernel
153s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
06/12/2022, 07:06

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General

Target

0870a4727fcd6ce557f017f0fed61f51.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

pid	Process
4992	vjfiz.exe
4932	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	vjfiz.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4992 set thread context of 4932	4992	vjfiz.exe	81
PID 4932 set thread context of 2864	4932	vjfiz.exe	54
PID 2116 set thread context of 2864	2116	cmstp.exe	54

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmstp.exe

Suspicious behavior: EnumeratesProcesses 62 IoCs

pid	Process
4932	vjfiz.exe
4932	vjfiz.exe
4932	vjfiz.exe
4932	vjfiz.exe
4932	vjfiz.exe
4932	vjfiz.exe
4932	vjfiz.exe
4932	vjfiz.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2864	Explorer.EXE

Suspicious behavior: MapViewOfSection 8 IoCs

pid	Process
4992	vjfiz.exe
4932	vjfiz.exe
4932	vjfiz.exe
4932	vjfiz.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe
2116	cmstp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4932	vjfiz.exe
Token: SeDebugPrivilege	2116	cmstp.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 5076 wrote to memory of 4992	5076	0870a4727fcd6ce557f017f0fed61f51.exe	80
PID 5076 wrote to memory of 4992	5076	0870a4727fcd6ce557f017f0fed61f51.exe	80
PID 5076 wrote to memory of 4992	5076	0870a4727fcd6ce557f017f0fed61f51.exe	80
PID 4992 wrote to memory of 4932	4992	vjfiz.exe	81
PID 4992 wrote to memory of 4932	4992	vjfiz.exe	81
PID 4992 wrote to memory of 4932	4992	vjfiz.exe	81
PID 4992 wrote to memory of 4932	4992	vjfiz.exe	81
PID 2864 wrote to memory of 2116	2864	Explorer.EXE	82
PID 2864 wrote to memory of 2116	2864	Explorer.EXE	82
PID 2864 wrote to memory of 2116	2864	Explorer.EXE	82
PID 2116 wrote to memory of 756	2116	cmstp.exe	90
PID 2116 wrote to memory of 756	2116	cmstp.exe	90
PID 2116 wrote to memory of 756	2116	cmstp.exe	90

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2864
- C:\Users\Admin\AppData\Local\Temp\0870a4727fcd6ce557f017f0fed61f51.exe
  "C:\Users\Admin\AppData\Local\Temp\0870a4727fcd6ce557f017f0fed61f51.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5076
- - 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:4992
  - - 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:4932
- C:\Windows\SysWOW64\cmstp.exe
  "C:\Windows\SysWOW64\cmstp.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2116
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:756

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

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/2116-147-0x0000000002DF0000-0x000000000313A000-memory.dmp

Filesize
3.3MB

Download
memory/2116-151-0x0000000000B90000-0x0000000000BBD000-memory.dmp

Filesize
180KB

Download
memory/2116-148-0x0000000002B10000-0x0000000002B9F000-memory.dmp

Filesize
572KB

Download
memory/2116-146-0x0000000000B90000-0x0000000000BBD000-memory.dmp

Filesize
180KB

Download
memory/2116-145-0x0000000000F70000-0x0000000000F86000-memory.dmp

Filesize
88KB

Download
memory/2864-152-0x0000000008110000-0x0000000008256000-memory.dmp

Filesize
1.3MB

Download
memory/2864-150-0x0000000008110000-0x0000000008256000-memory.dmp

Filesize
1.3MB

Download
memory/2864-149-0x0000000007F20000-0x00000000080AC000-memory.dmp

Filesize
1.5MB

Download
memory/2864-143-0x0000000007F20000-0x00000000080AC000-memory.dmp

Filesize
1.5MB

Download
memory/4932-142-0x0000000000E20000-0x0000000000E30000-memory.dmp

Filesize
64KB

Download
memory/4932-140-0x0000000000401000-0x000000000042F000-memory.dmp

Filesize
184KB

Download
memory/4932-141-0x0000000001500000-0x000000000184A000-memory.dmp

Filesize
3.3MB

Download
memory/4932-139-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download