formbook | 5017913bca4c5c1eaf5646e3983f9d8fc4e52f4a66406f46f3029952ae1fde70

Resubmissions

18/10/2022, 20:13

221018-yzmhxadee7 10

18/10/2022, 14:28

221018-rs73psgba7 10

Analysis

max time kernel
1800s
max time network
1802s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
18/10/2022, 20:13

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General

Target

payload.exe
Size

185KB
MD5

14382242e215d139c77c0ee9bb0c7ad6
SHA1

3951322a28787e4757fd3715d518103d6c054960
SHA256

5017913bca4c5c1eaf5646e3983f9d8fc4e52f4a66406f46f3029952ae1fde70
SHA512

1f4eef4d4685ca466702b45fa163e31089c031d2c491b4a14279bf28cba64a1aada928536df2970399510c4efb093ab08c7a05f0223fde66e751e20c26e07a4b
SSDEEP

3072:yXoVNpuuK+ArjKxjCpZomp/04AkJmHrwF8gUdSl5xCZqnr/xA3unPu:bfp5SZow/04tUuUdeSqri3gu

Score

10^/10

formbook knnt persistence rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

knnt

Decoy

65SBubRb0cQTZyel+RrmtuIytWG7hIY=

lxY8gZLYuXPYl40/

IBCcbQLOUkWVL3cA/DkK2ei+vuKlXA==

4Lo6dar405m4hxqWl58sOc0=

4KyQBqNrzYWTI6Iv016m7BZVvuKlXA==

PyCmasPI0Lj0JTU=

hnoGNwDmybXus0PVH2S1Td2l0ZTJ

s4CRDagqgmaCo9bOBD4i

T5IbS3G46ZbN8RncbsWuAiWl0ZTJ

2vxQ/T6e+7vkjz9yriaOpBbO8bYapwAu

55558Jha4dgR7PCZrQ==

O9KAFJVY3c4V1Xi2rEGne4ZMtSY=

ZPih22lkYU3Yl40/

mCc1tbkLsWeH

MpbgOtnQvGu9jQ==

D6uAq4Gdj3UEkzmKkCOIW4BG

A3rp8NpDzp2Q

4WMaDz2Ff26SfX5xEaABgk0WTQ==

G16+qE5AFMf20h0PxfsyLIZMtSY=

az44qCVNL8dm2vG/nuEbI3K46HT5K44=

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook

Executes dropped EXE 1 IoCs

pid	Process
4812	rnmvdfdm.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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	payload.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	msdt.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\PFMLY4E8VR = "C:\\Program Files (x86)\\Q7nddb\\rnmvdfdm.exe"	msdt.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5028 set thread context of 2576	5028	payload.exe	31
PID 5040 set thread context of 2576	5040	msdt.exe	31

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Q7nddb\rnmvdfdm.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\Q7nddb\rnmvdfdm.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\Q7nddb\rnmvdfdm.exe	msdt.exe
File opened for modification	C:\Program Files (x86)\Q7nddb	Explorer.EXE

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	msdt.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\	Explorer.EXE
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
5028	payload.exe
5028	payload.exe
5028	payload.exe
5028	payload.exe
5028	payload.exe
5028	payload.exe
5028	payload.exe
5028	payload.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2576	Explorer.EXE

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
5028	payload.exe
5028	payload.exe
5028	payload.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe
5040	msdt.exe

Suspicious use of AdjustPrivilegeToken 19 IoCs

description	pid	Process
Token: SeDebugPrivilege	5028	payload.exe
Token: SeDebugPrivilege	5040	msdt.exe
Token: SeShutdownPrivilege	2576	Explorer.EXE
Token: SeCreatePagefilePrivilege	2576	Explorer.EXE
Token: SeShutdownPrivilege	2576	Explorer.EXE
Token: SeCreatePagefilePrivilege	2576	Explorer.EXE
Token: SeShutdownPrivilege	2576	Explorer.EXE
Token: SeCreatePagefilePrivilege	2576	Explorer.EXE
Token: SeDebugPrivilege	4812	rnmvdfdm.exe
Token: SeShutdownPrivilege	2576	Explorer.EXE
Token: SeCreatePagefilePrivilege	2576	Explorer.EXE
Token: SeShutdownPrivilege	2576	Explorer.EXE
Token: SeCreatePagefilePrivilege	2576	Explorer.EXE
Token: SeShutdownPrivilege	2576	Explorer.EXE
Token: SeCreatePagefilePrivilege	2576	Explorer.EXE
Token: SeShutdownPrivilege	2576	Explorer.EXE
Token: SeCreatePagefilePrivilege	2576	Explorer.EXE
Token: SeShutdownPrivilege	2576	Explorer.EXE
Token: SeCreatePagefilePrivilege	2576	Explorer.EXE

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
2576	Explorer.EXE

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2576 wrote to memory of 5040	2576	Explorer.EXE	82
PID 2576 wrote to memory of 5040	2576	Explorer.EXE	82
PID 2576 wrote to memory of 5040	2576	Explorer.EXE	82
PID 5040 wrote to memory of 1940	5040	msdt.exe	89
PID 5040 wrote to memory of 1940	5040	msdt.exe	89
PID 5040 wrote to memory of 1940	5040	msdt.exe	89
PID 2576 wrote to memory of 4812	2576	Explorer.EXE	91
PID 2576 wrote to memory of 4812	2576	Explorer.EXE	91
PID 2576 wrote to memory of 4812	2576	Explorer.EXE	91

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2576
- C:\Users\Admin\AppData\Local\Temp\payload.exe
  "C:\Users\Admin\AppData\Local\Temp\payload.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  PID:5028
- C:\Windows\SysWOW64\msdt.exe
  "C:\Windows\SysWOW64\msdt.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Drops file in Program Files directory
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5040
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:1940
- C:\Program Files (x86)\Q7nddb\rnmvdfdm.exe
  "C:\Program Files (x86)\Q7nddb\rnmvdfdm.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:4812

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\Q7nddb\rnmvdfdm.exe

Filesize
185KB

MD5
14382242e215d139c77c0ee9bb0c7ad6

SHA1
3951322a28787e4757fd3715d518103d6c054960

SHA256
5017913bca4c5c1eaf5646e3983f9d8fc4e52f4a66406f46f3029952ae1fde70

SHA512
1f4eef4d4685ca466702b45fa163e31089c031d2c491b4a14279bf28cba64a1aada928536df2970399510c4efb093ab08c7a05f0223fde66e751e20c26e07a4b

Download Submit
C:\Program Files (x86)\Q7nddb\rnmvdfdm.exe

Filesize
185KB

MD5
14382242e215d139c77c0ee9bb0c7ad6

SHA1
3951322a28787e4757fd3715d518103d6c054960

SHA256
5017913bca4c5c1eaf5646e3983f9d8fc4e52f4a66406f46f3029952ae1fde70

SHA512
1f4eef4d4685ca466702b45fa163e31089c031d2c491b4a14279bf28cba64a1aada928536df2970399510c4efb093ab08c7a05f0223fde66e751e20c26e07a4b

Download Submit
memory/2576-144-0x0000000008300000-0x000000000846C000-memory.dmp

Filesize
1.4MB

Download
memory/2576-135-0x0000000007260000-0x000000000739B000-memory.dmp

Filesize
1.2MB

Download
memory/2576-142-0x0000000008300000-0x000000000846C000-memory.dmp

Filesize
1.4MB

Download
memory/4812-149-0x0000000001790000-0x0000000001ADA000-memory.dmp

Filesize
3.3MB

Download
memory/4812-148-0x0000000000AC0000-0x0000000000AEF000-memory.dmp

Filesize
188KB

Download
memory/5028-133-0x0000000001160000-0x00000000014AA000-memory.dmp

Filesize
3.3MB

Download
memory/5028-134-0x0000000000C80000-0x0000000000C90000-memory.dmp

Filesize
64KB

Download
memory/5028-132-0x0000000000F70000-0x0000000000F9F000-memory.dmp

Filesize
188KB

Download
memory/5028-137-0x0000000000F70000-0x0000000000F9F000-memory.dmp

Filesize
188KB

Download
memory/5040-143-0x0000000001090000-0x00000000010BD000-memory.dmp

Filesize
180KB

Download
memory/5040-141-0x0000000002EC0000-0x0000000002F4F000-memory.dmp

Filesize
572KB

Download
memory/5040-140-0x00000000030A0000-0x00000000033EA000-memory.dmp

Filesize
3.3MB

Download
memory/5040-139-0x0000000001090000-0x00000000010BD000-memory.dmp

Filesize
180KB

Download
memory/5040-138-0x0000000000AD0000-0x0000000000B27000-memory.dmp

Filesize
348KB

Download