formbook | b9f158fac329391c893814424e77c4f9fc0460026b93327d8cf35598a561a1de

General

Target

b85bcfc355d32617c12a2e71d4f80880.exe
Size

271KB
MD5

b85bcfc355d32617c12a2e71d4f80880
SHA1

8f5e2fcc9006bdbdcab9b6e15893b781fb893775
SHA256

b9f158fac329391c893814424e77c4f9fc0460026b93327d8cf35598a561a1de
SHA512

90874f7c64abd954ec34b4152dee1562cb55af65916e854dcf9c52f4be0270ff71c3fe57f0466f7dc18ce49c5cface4b5818df355a847bba5a4c982721b56bd5
SSDEEP

6144:QBn1vvXZCzNhTIyD2bE8Nf7B0AxHklinnqPazURP3gawRwcV:gv+m/NDB0AxHklinnqPai3gdScV

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
Blocklisted process makes network request 2 IoCs

Processes:

cmstp.exe

flow pid process

8 1820 cmstp.exe
16 1820 cmstp.exe
Executes dropped EXE 2 IoCs

Processes:

ymloqhw.exeymloqhw.exe

pid process

892 ymloqhw.exe
588 ymloqhw.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:

ymloqhw.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Control Panel\International\Geo\Nation ymloqhw.exe
Loads dropped DLL 3 IoCs

Processes:

b85bcfc355d32617c12a2e71d4f80880.exeymloqhw.execmstp.exe

pid process

688 b85bcfc355d32617c12a2e71d4f80880.exe
892 ymloqhw.exe
1820 cmstp.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

flow	pid	process
8	1820	cmstp.exe
16	1820	cmstp.exe

pid	process
892	ymloqhw.exe
588	ymloqhw.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Control Panel\International\Geo\Nation	ymloqhw.exe

pid	process
688	b85bcfc355d32617c12a2e71d4f80880.exe
892	ymloqhw.exe
1820	cmstp.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

ymloqhw.exeymloqhw.execmstp.exe

description	pid	process	target process
PID 892 set thread context of 588	892	ymloqhw.exe	ymloqhw.exe
PID 588 set thread context of 1312	588	ymloqhw.exe	Explorer.EXE
PID 1820 set thread context of 1312	1820	cmstp.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

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

cmstp.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-3385717845-2518323428-350143044-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmstp.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

Processes:

ymloqhw.execmstp.exe

pid	process
588	ymloqhw.exe
588	ymloqhw.exe
588	ymloqhw.exe
588	ymloqhw.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1312 Explorer.EXE
Suspicious behavior: MapViewOfSection 8 IoCs

Processes:

ymloqhw.exeymloqhw.execmstp.exe

pid process

892 ymloqhw.exe
588 ymloqhw.exe
588 ymloqhw.exe
588 ymloqhw.exe
1820 cmstp.exe
1820 cmstp.exe
1820 cmstp.exe
1820 cmstp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

ymloqhw.execmstp.exe

description pid process

Token: SeDebugPrivilege 588 ymloqhw.exe
Token: SeDebugPrivilege 1820 cmstp.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1312 Explorer.EXE
1312 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1312 Explorer.EXE
1312 Explorer.EXE

pid	process
1312	Explorer.EXE

pid	process
892	ymloqhw.exe
588	ymloqhw.exe
588	ymloqhw.exe
588	ymloqhw.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe
1820	cmstp.exe

description	pid	process
Token: SeDebugPrivilege	588	ymloqhw.exe
Token: SeDebugPrivilege	1820	cmstp.exe

pid	process
1312	Explorer.EXE
1312	Explorer.EXE

pid	process
1312	Explorer.EXE
1312	Explorer.EXE

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

b85bcfc355d32617c12a2e71d4f80880.exeymloqhw.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 688 wrote to memory of 892	688	b85bcfc355d32617c12a2e71d4f80880.exe	ymloqhw.exe
PID 688 wrote to memory of 892	688	b85bcfc355d32617c12a2e71d4f80880.exe	ymloqhw.exe
PID 688 wrote to memory of 892	688	b85bcfc355d32617c12a2e71d4f80880.exe	ymloqhw.exe
PID 688 wrote to memory of 892	688	b85bcfc355d32617c12a2e71d4f80880.exe	ymloqhw.exe
PID 892 wrote to memory of 588	892	ymloqhw.exe	ymloqhw.exe
PID 892 wrote to memory of 588	892	ymloqhw.exe	ymloqhw.exe
PID 892 wrote to memory of 588	892	ymloqhw.exe	ymloqhw.exe
PID 892 wrote to memory of 588	892	ymloqhw.exe	ymloqhw.exe
PID 892 wrote to memory of 588	892	ymloqhw.exe	ymloqhw.exe
PID 1312 wrote to memory of 1820	1312	Explorer.EXE	cmstp.exe
PID 1312 wrote to memory of 1820	1312	Explorer.EXE	cmstp.exe
PID 1312 wrote to memory of 1820	1312	Explorer.EXE	cmstp.exe
PID 1312 wrote to memory of 1820	1312	Explorer.EXE	cmstp.exe
PID 1312 wrote to memory of 1820	1312	Explorer.EXE	cmstp.exe
PID 1312 wrote to memory of 1820	1312	Explorer.EXE	cmstp.exe
PID 1312 wrote to memory of 1820	1312	Explorer.EXE	cmstp.exe
PID 1820 wrote to memory of 2032	1820	cmstp.exe	Firefox.exe
PID 1820 wrote to memory of 2032	1820	cmstp.exe	Firefox.exe
PID 1820 wrote to memory of 2032	1820	cmstp.exe	Firefox.exe
PID 1820 wrote to memory of 2032	1820	cmstp.exe	Firefox.exe
PID 1820 wrote to memory of 2032	1820	cmstp.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1312

C:\Users\Admin\AppData\Local\Temp\b85bcfc355d32617c12a2e71d4f80880.exe
"C:\Users\Admin\AppData\Local\Temp\b85bcfc355d32617c12a2e71d4f80880.exe"
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:688

C:\Users\Admin\AppData\Local\Temp\ymloqhw.exe
"C:\Users\Admin\AppData\Local\Temp\ymloqhw.exe" C:\Users\Admin\AppData\Local\Temp\mpghhn.eq
3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:892

C:\Users\Admin\AppData\Local\Temp\ymloqhw.exe
"C:\Users\Admin\AppData\Local\Temp\ymloqhw.exe"
4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:588

C:\Windows\SysWOW64\cmstp.exe
"C:\Windows\SysWOW64\cmstp.exe"
2⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1820

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:2032

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\hpthvgglt.l
Filesize
185KB

MD5
fb17e00ac583fe89f38f0bbb9ccb8050

SHA1
d46337d1555b7e55b0c93119bb64674e76e9d708

SHA256
52804ab58a315767b6a1e6aa2d2929c59fcebbf9987c1b1a96b29b5058cd2c2c

SHA512
3e7f33d00628e6dc65cae8ddbf6cc84a1ef2ae1216f7f95723f1045f98315361c4339bddae5045ef150052bd4e2212ff751476389da8f2a9abc86b7c841ae739

Download Submit
C:\Users\Admin\AppData\Local\Temp\mpghhn.eq
Filesize
5KB

MD5
c066e7e0e80848e742991ebd6b4312fe

SHA1
c837d365515949d61e35166a605019f9577b9755

SHA256
1864986a084fa6adcf2e34ca40bbbac13c238af9f9c3238123273bf2875c207c

SHA512
6ba1556565903a9bb2754e615d2feade7d14df0b59a48fc68a08a0d9ff6cc8f350f2897ecb04685e3934ca0770d346e858d8e6089b8460d87837e2dbc5dc8f76

Download Submit
C:\Users\Admin\AppData\Local\Temp\ymloqhw.exe
Filesize
100KB

MD5
62e7501ba9d2982ab16107c276d2e82a

SHA1
ebbb812d6cca55c6756beb4694bd430c54cd2ec9

SHA256
633fb361810f5cd64acfda82f0bfd93d26000c397187459b70e0d0ea922e94cf

SHA512
1ccc7662c751fec76204bc0db15cbb5ac20854b2c95a9a5cc82b100ae6b4c2ee0d8ad062c30bbc62a7c00884d85409ebfe6b0ce8f20b8b373602b9f4d3238ac6

Download Submit
C:\Users\Admin\AppData\Local\Temp\ymloqhw.exe
Filesize
100KB

MD5
62e7501ba9d2982ab16107c276d2e82a

SHA1
ebbb812d6cca55c6756beb4694bd430c54cd2ec9

SHA256
633fb361810f5cd64acfda82f0bfd93d26000c397187459b70e0d0ea922e94cf

SHA512
1ccc7662c751fec76204bc0db15cbb5ac20854b2c95a9a5cc82b100ae6b4c2ee0d8ad062c30bbc62a7c00884d85409ebfe6b0ce8f20b8b373602b9f4d3238ac6

Download Submit
C:\Users\Admin\AppData\Local\Temp\ymloqhw.exe
Filesize
100KB

MD5
62e7501ba9d2982ab16107c276d2e82a

SHA1
ebbb812d6cca55c6756beb4694bd430c54cd2ec9

SHA256
633fb361810f5cd64acfda82f0bfd93d26000c397187459b70e0d0ea922e94cf

SHA512
1ccc7662c751fec76204bc0db15cbb5ac20854b2c95a9a5cc82b100ae6b4c2ee0d8ad062c30bbc62a7c00884d85409ebfe6b0ce8f20b8b373602b9f4d3238ac6

Download Submit
\Users\Admin\AppData\Local\Temp\sqlite3.dll
Filesize
820KB

MD5
317ba2f8e624ec0c7d3714e2bde4f346

SHA1
12734675cfad66d78252515644a624964f69f94d

SHA256
0c2093493424e885c297d613e0cf343d8a084253ca3b044415e14c6e94696877

SHA512
ecc4a6f951cd7958288b7de35b253475fcc0910f5385b0b38db872a412b547ef5d8e7056865d26ae46b3b027d8b0bb37aa25ec6cb1a67abd342799795bfd3b08

Download Submit
\Users\Admin\AppData\Local\Temp\ymloqhw.exe
Filesize
100KB

MD5
62e7501ba9d2982ab16107c276d2e82a

SHA1
ebbb812d6cca55c6756beb4694bd430c54cd2ec9

SHA256
633fb361810f5cd64acfda82f0bfd93d26000c397187459b70e0d0ea922e94cf

SHA512
1ccc7662c751fec76204bc0db15cbb5ac20854b2c95a9a5cc82b100ae6b4c2ee0d8ad062c30bbc62a7c00884d85409ebfe6b0ce8f20b8b373602b9f4d3238ac6

Download Submit
\Users\Admin\AppData\Local\Temp\ymloqhw.exe
Filesize
100KB

MD5
62e7501ba9d2982ab16107c276d2e82a

SHA1
ebbb812d6cca55c6756beb4694bd430c54cd2ec9

SHA256
633fb361810f5cd64acfda82f0bfd93d26000c397187459b70e0d0ea922e94cf

SHA512
1ccc7662c751fec76204bc0db15cbb5ac20854b2c95a9a5cc82b100ae6b4c2ee0d8ad062c30bbc62a7c00884d85409ebfe6b0ce8f20b8b373602b9f4d3238ac6

Download Submit
memory/588-67-0x0000000000830000-0x0000000000B33000-memory.dmp

Filesize
3.0MB

Download
memory/588-65-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/588-66-0x0000000000401000-0x000000000042F000-memory.dmp

Filesize
184KB

Download
memory/588-68-0x0000000000080000-0x0000000000090000-memory.dmp

Filesize
64KB

Download
memory/588-63-0x00000000004012B0-mapping.dmp

Download
memory/688-54-0x0000000075F21000-0x0000000075F23000-memory.dmp

Filesize
8KB

Download
memory/892-56-0x0000000000000000-mapping.dmp

Download
memory/1312-76-0x0000000004300000-0x00000000043B3000-memory.dmp

Filesize
716KB

Download
memory/1312-69-0x0000000006780000-0x000000000691E000-memory.dmp

Filesize
1.6MB

Download
memory/1312-78-0x0000000004300000-0x00000000043B3000-memory.dmp

Filesize
716KB

Download
memory/1820-70-0x0000000000000000-mapping.dmp

Download
memory/1820-74-0x0000000001FD0000-0x00000000022D3000-memory.dmp

Filesize
3.0MB

Download
memory/1820-75-0x0000000000960000-0x00000000009EF000-memory.dmp

Filesize
572KB

Download
memory/1820-77-0x0000000000090000-0x00000000000BD000-memory.dmp

Filesize
180KB

Download
memory/1820-73-0x0000000000090000-0x00000000000BD000-memory.dmp

Filesize
180KB

Download
memory/1820-72-0x0000000000A20000-0x0000000000A38000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads