formbook | 6df68164866d5b1b6ac0f188ccfb12bceee5c013c411cacc8212ade1807015ad

General

Target

28095361.exe
Size

445KB
MD5

eb177fb227c18d784c930896b96223a4
SHA1

9b70ef7c4fb0c47a8a81e5b479cc21ddec5874b2
SHA256

6df68164866d5b1b6ac0f188ccfb12bceee5c013c411cacc8212ade1807015ad
SHA512

857e12e274d05645c0b94db4c915321dc72699a4f7ad611d348b6117aa45409cc8df1508f9e6808f64ed4e03d9f2a4fac7ef4ef8299af12c1e5722c1e0d90472
SSDEEP

12288:XNF12FRDkeuvdh6vX2UoJLtZAxSoklfwBX3wVDszvBUU:XNF12PIfdh6vX2tJKSokGwu

Score

10^/10

formbook yurm rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

yurm

Decoy

X06d1tis1GUX/R0g87Ud

BKiZ33D1P766GVXO1ZwV

lAFdjB7CSxGX8Trz

Gc7dWizTVxWX8Trz

tDkr9JAfi1OHAW1PGOageIp4

bCpMtHKU3mVp8BY5sQ==

7WKpsMWt8nsrhJClJeOZNg==

0A9KTlETQ86Cmd8k0o5NP5RwCg==

aJ61paNJztSp42c=

CrgoA8ySIOsytCbO1ZwV

i46SnHYDD9tTIHI=

XFRCRCjtFZeU3x4Rn3xfD5BnPz+RDA==

c4CZghuHvzW9A31gEz0d

QAjzz9qyRRWBNYseAI4M

Jpbmu4A1YvBvN3ruZgiRmJA5BCFd

PfoFXGNFhhuX8Trz

bqCfk0m8ApAl+Tm1Ms5Tb23IT7tS

z7INff7HNALxc5HWq2/ftrVR6A7R1zvTUQ==

m7IShV4LSFxbqxhrVsZ1Ig==

BHRp7q0gtoRuqBRnVsZ1Ig==

Signatures

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

Processes:

28095361.exeCasPol.execmstp.exe

description	pid	process	target process
PID 3432 set thread context of 32	3432	28095361.exe	CasPol.exe
PID 32 set thread context of 2644	32	CasPol.exe	Explorer.EXE
PID 4328 set thread context of 2644	4328	cmstp.exe	Explorer.EXE

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

cmstp.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmstp.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

Processes:

CasPol.execmstp.exe

pid	process
32	CasPol.exe
32	CasPol.exe
32	CasPol.exe
32	CasPol.exe
32	CasPol.exe
32	CasPol.exe
32	CasPol.exe
32	CasPol.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe
4328	cmstp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2644 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

CasPol.execmstp.exe

pid process

32 CasPol.exe
32 CasPol.exe
32 CasPol.exe
4328 cmstp.exe
4328 cmstp.exe
4328 cmstp.exe
4328 cmstp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

CasPol.execmstp.exe

description pid process

Token: SeDebugPrivilege 32 CasPol.exe
Token: SeDebugPrivilege 4328 cmstp.exe

pid	process
2644	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	32	CasPol.exe
Token: SeDebugPrivilege	4328	cmstp.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

28095361.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 3432 wrote to memory of 32	3432	28095361.exe	CasPol.exe
PID 3432 wrote to memory of 32	3432	28095361.exe	CasPol.exe
PID 3432 wrote to memory of 32	3432	28095361.exe	CasPol.exe
PID 3432 wrote to memory of 32	3432	28095361.exe	CasPol.exe
PID 3432 wrote to memory of 32	3432	28095361.exe	CasPol.exe
PID 3432 wrote to memory of 32	3432	28095361.exe	CasPol.exe
PID 2644 wrote to memory of 4328	2644	Explorer.EXE	cmstp.exe
PID 2644 wrote to memory of 4328	2644	Explorer.EXE	cmstp.exe
PID 2644 wrote to memory of 4328	2644	Explorer.EXE	cmstp.exe
PID 4328 wrote to memory of 4900	4328	cmstp.exe	Firefox.exe
PID 4328 wrote to memory of 4900	4328	cmstp.exe	Firefox.exe
PID 4328 wrote to memory of 4900	4328	cmstp.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2644

C:\Users\Admin\AppData\Local\Temp\28095361.exe
"C:\Users\Admin\AppData\Local\Temp\28095361.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3432

C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:32

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:4328

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:4900

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/32-144-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/32-145-0x0000000000401000-0x000000000042F000-memory.dmp

Filesize
184KB

Download
memory/32-134-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/32-135-0x00000000004012B0-mapping.dmp

Download
memory/32-138-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/32-139-0x0000000000401000-0x000000000042F000-memory.dmp

Filesize
184KB

Download
memory/32-142-0x00000000012F0000-0x0000000001300000-memory.dmp

Filesize
64KB

Download
memory/32-140-0x0000000001920000-0x0000000001C6A000-memory.dmp

Filesize
3.3MB

Download
memory/2644-143-0x0000000002810000-0x0000000002931000-memory.dmp

Filesize
1.1MB

Download
memory/2644-152-0x00000000084D0000-0x000000000860C000-memory.dmp

Filesize
1.2MB

Download
memory/2644-153-0x00000000084D0000-0x000000000860C000-memory.dmp

Filesize
1.2MB

Download
memory/3432-137-0x00007FFA04AB0000-0x00007FFA05571000-memory.dmp

Filesize
10.8MB

Download
memory/3432-133-0x00007FFA04AB0000-0x00007FFA05571000-memory.dmp

Filesize
10.8MB

Download
memory/3432-132-0x00000299E09E0000-0x00000299E0A54000-memory.dmp

Filesize
464KB

Download
memory/4328-151-0x0000000002850000-0x00000000028DF000-memory.dmp

Filesize
572KB

Download
memory/4328-149-0x0000000002AB0000-0x0000000002DFA000-memory.dmp

Filesize
3.3MB

Download
memory/4328-150-0x0000000000A80000-0x0000000000AAD000-memory.dmp

Filesize
180KB

Download
memory/4328-148-0x0000000000A80000-0x0000000000AAD000-memory.dmp

Filesize
180KB

Download
memory/4328-147-0x0000000000F90000-0x0000000000FA6000-memory.dmp

Filesize
88KB

Download
memory/4328-146-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads