formbook | 12a921f6abb929d4f8b28924868dcc468299e44745c37db3aa7e4ac9bfe38869

Analysis

max time kernel
331s
max time network
408s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
07-12-2022 12:48

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General

Target

2b087c00777a630a4100c122f4687783.exe
Size

334KB
MD5

2b087c00777a630a4100c122f4687783
SHA1

618f5bf8bea9d2c431c4389c18e2dd91082a0d67
SHA256

12a921f6abb929d4f8b28924868dcc468299e44745c37db3aa7e4ac9bfe38869
SHA512

cb47508cf530de56e1c2317351eca84b832d431a516c4da2676855e6d76fc6d06b4b328d4c7ece2ff7ccc54acf04644a1f30e4e8b8067dc9889f4a7a32eaa37b
SSDEEP

6144:QBn1W74u851+xu+La/EZ4sAR7Im/VvQgUJ5IBjiIQ1XhXXMaXTEZ2iaH4hY:gW7OgxLLaE2R7IwY5MjinzEoPHKY

Score

10^/10

formbook henz rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

henz

Decoy

IxWMb+jVsoinShuZJzk=

TPfKgQZ//oGnKr/J

EsK0WxD5kY65XOW1Td/5CxSUpCUytR7M

KebSmiCP9p8yUw==

HAt/ljkEuqMLHOLCi53Pv8MKX9qk

CY4ogZTwJc4vSw==

WWDIx5UYUDyepntE0YIAPca3/rI=

+Pkr01Lfb2rME7bL

S5nyK0p8jS2xdwQ=

W/oqvlO57LfkLcLHnQ==

zrrwtqkTLwxulm4l8FGopw==

AqucYext8bzFbOKthIm8E6gfVkUHxKY=

OfnjeDs78+RTcz4OHRl+

XKf1wwpZR5hLLjHgmUGOpQ==

JMyhSLoJPTCwn5o9zX2d8i1+

Wk54MBsDhWSVbnIRkQ==

7aaYR/tOhh9piTw5/KHSRwuK2iqgafw7pQ==

hH/EYxN+jC2xdwQ=

S0F4ORqDjS2xdwQ=

0o/UwXnuJ+sJp0cOHRl+

Signatures

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

Processes:

rbygg.exerbygg.exe

pid process

1740 rbygg.exe
1028 rbygg.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

rbygg.exe

description pid process target process

PID 1740 set thread context of 1028 1740 rbygg.exe rbygg.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rbygg.exe

pid process

1028 rbygg.exe
1028 rbygg.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

rbygg.exe

pid process

1740 rbygg.exe
1740 rbygg.exe

pid	process
1740	rbygg.exe
1028	rbygg.exe

description	pid	process	target process
PID 1740 set thread context of 1028	1740	rbygg.exe	rbygg.exe

pid	process
1028	rbygg.exe
1028	rbygg.exe

pid	process
1740	rbygg.exe
1740	rbygg.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

2b087c00777a630a4100c122f4687783.exerbygg.exe

description	pid	process	target process
PID 1864 wrote to memory of 1740	1864	2b087c00777a630a4100c122f4687783.exe	rbygg.exe
PID 1864 wrote to memory of 1740	1864	2b087c00777a630a4100c122f4687783.exe	rbygg.exe
PID 1864 wrote to memory of 1740	1864	2b087c00777a630a4100c122f4687783.exe	rbygg.exe
PID 1740 wrote to memory of 1028	1740	rbygg.exe	rbygg.exe
PID 1740 wrote to memory of 1028	1740	rbygg.exe	rbygg.exe
PID 1740 wrote to memory of 1028	1740	rbygg.exe	rbygg.exe
PID 1740 wrote to memory of 1028	1740	rbygg.exe	rbygg.exe

C:\Users\Admin\AppData\Local\Temp\2b087c00777a630a4100c122f4687783.exe
"C:\Users\Admin\AppData\Local\Temp\2b087c00777a630a4100c122f4687783.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1864

C:\Users\Admin\AppData\Local\Temp\rbygg.exe
"C:\Users\Admin\AppData\Local\Temp\rbygg.exe" C:\Users\Admin\AppData\Local\Temp\kddircpspqa.tkt
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1740

C:\Users\Admin\AppData\Local\Temp\rbygg.exe
"C:\Users\Admin\AppData\Local\Temp\rbygg.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1028

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\kddircpspqa.tkt
Filesize
5KB

MD5
5def413bb305e22659152545633d4394

SHA1
ea186096bc4445be3a749bfe98ff1549f822da5e

SHA256
69ac40a2aeebad2a280bb794d8a8f0a2e2d195739b6317d4f94897bc22a51309

SHA512
e4917aced9bae7c29d4bb553a8675596719c8ff5e39cd8f034ae897197fd662b596b013311d010b9282fa269ae03fdc6aba27c2e84ba9f350771ff7a022e2144

Download Submit
C:\Users\Admin\AppData\Local\Temp\rbygg.exe
Filesize
267KB

MD5
8dcd475914550c7b97c0692d42b0b5cc

SHA1
07f9a2e01086f31881d2b46447a30032ddaf1b75

SHA256
408c5d65bd00332fcc1fcdfd1b01e6bcea3ec07d236f2d203977d824c76cdcf4

SHA512
5e2f68ba27ef5c5749826e3a7483e3920a5c43101cb8c6d117567d6bae7b87d23b0090e5b75213481b9a0ee1c10b4e437982d8d9de56fce0b37b3e590dd10a23

Download Submit
C:\Users\Admin\AppData\Local\Temp\rbygg.exe
Filesize
267KB

MD5
8dcd475914550c7b97c0692d42b0b5cc

SHA1
07f9a2e01086f31881d2b46447a30032ddaf1b75

SHA256
408c5d65bd00332fcc1fcdfd1b01e6bcea3ec07d236f2d203977d824c76cdcf4

SHA512
5e2f68ba27ef5c5749826e3a7483e3920a5c43101cb8c6d117567d6bae7b87d23b0090e5b75213481b9a0ee1c10b4e437982d8d9de56fce0b37b3e590dd10a23

Download Submit
C:\Users\Admin\AppData\Local\Temp\rbygg.exe
Filesize
267KB

MD5
8dcd475914550c7b97c0692d42b0b5cc

SHA1
07f9a2e01086f31881d2b46447a30032ddaf1b75

SHA256
408c5d65bd00332fcc1fcdfd1b01e6bcea3ec07d236f2d203977d824c76cdcf4

SHA512
5e2f68ba27ef5c5749826e3a7483e3920a5c43101cb8c6d117567d6bae7b87d23b0090e5b75213481b9a0ee1c10b4e437982d8d9de56fce0b37b3e590dd10a23

Download Submit
C:\Users\Admin\AppData\Local\Temp\wiidn.o
Filesize
185KB

MD5
c985ca943df871d4ca23679cb7be7dd7

SHA1
a6d315d44a90d685deb4eea6c6778ed2e5f0f575

SHA256
2b159ae78ee415b70683cbc5fc7d479b9dc62c127d98afa021f10824ca8fb8ab

SHA512
5d471a2a84751b756863e4766f7ec1f288c08482ac365e90726501dc385a99da72a6b7104e7dfeb365926997c7df1aa22f9f9c8b343ed60d53ed868b3e8933c4

Download Submit
memory/1028-137-0x0000000000000000-mapping.dmp

Download
memory/1028-139-0x0000000000350000-0x000000000037F000-memory.dmp

Filesize
188KB

Download
memory/1028-140-0x0000000000C70000-0x0000000000FBA000-memory.dmp

Filesize
3.3MB

Download
memory/1740-132-0x0000000000000000-mapping.dmp

Download