formbook | ae74329d05f75049f9fc301d1ea99c34b4320edd9e3af685c84d47dd69406d08

General

Target

wininfo32/lib64.exe
Size

202KB
MD5

676380743dd23f61e18c1e044105168a
SHA1

387fbee19170c2ddc8c4faa2b38131fe9b3259de
SHA256

d8b2ccbb31253f78340e5a95ac72cb871e52338526817cc5db09107becaf7b36
SHA512

685d3bf901993ddec9a786132f1f9e9b48c6d8697fdce67f26813b0e1d1b1b2419d37db35c43829578255b51d80877a243b395d2a4423eef4174b5168dfc8b14
SSDEEP

6144:qxAVDI/PTDCC4vX7NYEpItOeDwh0UkezRpt:qxAVD6Pn0v+EaOeDo0yzRT

Score

10^/10

formbook s3f0 rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

s3f0

Decoy

zm/xqaOkp7SIM6I9k8cYYQ==

R3BJUiYhIJsD50TcNbbEexs=

r92WbDh7DjlsCftKuG56

UmoUBecGa6YL6A==

UQLQ4AmN+i0R

ATNkzEHBHyMM

BSHJi2n11k/Oq+6Mug==

+Z7elo1OY5UH6Q==

dZEf25y+5WLNqDGY9DI=

Zu6ipAkOo1QGo6fHrw==

iquKhUajLOlfLDduk8cYYQ==

6HcbD4jxPzcS

kCkEGSRmmQVzS1l7k8cYYQ==

kpV9fdfeZ3ZO/ozTsg==

Vea2yr7h+HTYxwHH9C8=

j7h4fHeMuGfayAHH9C8=

tcQ2/YKFQAFqYKxQfu09Rjl6FA==

RVYC2MYEERU2x8sXLiY=

dv+nDEaN+i0R

CbNkLJj8EFE0Hmn/LSeqpVhnTmJs

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

7 980 cmstp.exe
25 980 cmstp.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:

lib64.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Control Panel\International\Geo\Nation lib64.exe
Loads dropped DLL 1 IoCs

Processes:

cmstp.exe

pid process

980 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
7	980	cmstp.exe
25	980	cmstp.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Control Panel\International\Geo\Nation	lib64.exe

pid	process
980	cmstp.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

lib64.execmstp.exe

description	pid	process	target process
PID 480 set thread context of 1208	480	lib64.exe	Explorer.EXE
PID 980 set thread context of 1208	980	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-1-5-21-3845472200-3839195424-595303356-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmstp.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

Processes:

lib64.execmstp.exe

pid	process
480	lib64.exe
480	lib64.exe
480	lib64.exe
480	lib64.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe
980	cmstp.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

lib64.execmstp.exe

pid process

480 lib64.exe
480 lib64.exe
480 lib64.exe
980 cmstp.exe
980 cmstp.exe
980 cmstp.exe
980 cmstp.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

lib64.execmstp.exeExplorer.EXE

description pid process

Token: SeDebugPrivilege 480 lib64.exe
Token: SeDebugPrivilege 980 cmstp.exe
Token: SeShutdownPrivilege 1208 Explorer.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1208 Explorer.EXE
1208 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1208 Explorer.EXE
1208 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	480	lib64.exe
Token: SeDebugPrivilege	980	cmstp.exe
Token: SeShutdownPrivilege	1208	Explorer.EXE

pid	process
1208	Explorer.EXE
1208	Explorer.EXE

pid	process
1208	Explorer.EXE
1208	Explorer.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

Explorer.EXEcmstp.exe

description	pid	process	target process
PID 1208 wrote to memory of 980	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 980	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 980	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 980	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 980	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 980	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 980	1208	Explorer.EXE	cmstp.exe
PID 980 wrote to memory of 968	980	cmstp.exe	Firefox.exe
PID 980 wrote to memory of 968	980	cmstp.exe	Firefox.exe
PID 980 wrote to memory of 968	980	cmstp.exe	Firefox.exe
PID 980 wrote to memory of 968	980	cmstp.exe	Firefox.exe
PID 980 wrote to memory of 968	980	cmstp.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1208

C:\Users\Admin\AppData\Local\Temp\wininfo32\lib64.exe
"C:\Users\Admin\AppData\Local\Temp\wininfo32\lib64.exe"
2⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:480

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:980

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:968

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

\Users\Admin\AppData\Local\Temp\sqlite3.dll
Filesize
810KB

MD5
c6ec991471d42128268ea10236d9cdb8

SHA1
d569350d02db6a118136220da8de40a9973084f1

SHA256
1b755cc3093dd45a0df857854aedfeb3c8f3622cff5bc491f2d492ebfa3ef8e0

SHA512
a67ed46547b9270c8a5a7a947b375cb6baf3211072f90170aae2bb6ce9c4fe9d7be3e9d782420dcfdbc19a1f232b3be561ca503b80e8dc3e036a62c54cad5b57

Download Submit
memory/480-54-0x0000000000960000-0x000000000098F000-memory.dmp

Filesize
188KB

Download
memory/480-55-0x0000000000990000-0x0000000000C93000-memory.dmp

Filesize
3.0MB

Download
memory/480-56-0x0000000000110000-0x0000000000120000-memory.dmp

Filesize
64KB

Download
memory/480-57-0x0000000000960000-0x000000000098F000-memory.dmp

Filesize
188KB

Download
memory/980-60-0x0000000075281000-0x0000000075283000-memory.dmp

Filesize
8KB

Download
memory/980-59-0x0000000000000000-mapping.dmp

Download
memory/980-61-0x0000000000D70000-0x0000000000D88000-memory.dmp

Filesize
96KB

Download
memory/980-62-0x00000000000F0000-0x000000000011D000-memory.dmp

Filesize
180KB

Download
memory/980-63-0x00000000009D0000-0x0000000000CD3000-memory.dmp

Filesize
3.0MB

Download
memory/980-64-0x00000000007C0000-0x000000000084F000-memory.dmp

Filesize
572KB

Download
memory/980-66-0x00000000000F0000-0x000000000011D000-memory.dmp

Filesize
180KB

Download
memory/1208-65-0x0000000007260000-0x00000000073B3000-memory.dmp

Filesize
1.3MB

Download
memory/1208-67-0x0000000007260000-0x00000000073B3000-memory.dmp

Filesize
1.3MB

Download
memory/1208-58-0x00000000049D0000-0x0000000004B00000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads