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
Blocklisted process makes network request 1 IoCs

Processes:

cmd.exe

flow pid process

7 984 cmd.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

984 cmd.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	984	cmd.exe

pid	process
984	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

28095361.exeCasPol.execmd.exe

description	pid	process	target process
PID 544 set thread context of 1872	544	28095361.exe	CasPol.exe
PID 1872 set thread context of 1352	1872	CasPol.exe	Explorer.EXE
PID 984 set thread context of 1352	984	cmd.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:

cmd.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-999675638-2867687379-27515722-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmd.exe

Suspicious behavior: EnumeratesProcesses 18 IoCs

Processes:

28095361.exeCasPol.execmd.exe

pid	process
544	28095361.exe
1872	CasPol.exe
1872	CasPol.exe
1872	CasPol.exe
1872	CasPol.exe
984	cmd.exe
984	cmd.exe
984	cmd.exe
984	cmd.exe
984	cmd.exe
984	cmd.exe
984	cmd.exe
984	cmd.exe
984	cmd.exe
984	cmd.exe
984	cmd.exe
984	cmd.exe
984	cmd.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

CasPol.execmd.exe

pid process

1872 CasPol.exe
1872 CasPol.exe
1872 CasPol.exe
984 cmd.exe
984 cmd.exe
984 cmd.exe
984 cmd.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

28095361.exeCasPol.execmd.exe

description pid process

Token: SeDebugPrivilege 544 28095361.exe
Token: SeDebugPrivilege 1872 CasPol.exe
Token: SeDebugPrivilege 984 cmd.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1352 Explorer.EXE
1352 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1352 Explorer.EXE
1352 Explorer.EXE

pid	process
1872	CasPol.exe
1872	CasPol.exe
1872	CasPol.exe
984	cmd.exe
984	cmd.exe
984	cmd.exe
984	cmd.exe

description	pid	process
Token: SeDebugPrivilege	544	28095361.exe
Token: SeDebugPrivilege	1872	CasPol.exe
Token: SeDebugPrivilege	984	cmd.exe

pid	process
1352	Explorer.EXE
1352	Explorer.EXE

pid	process
1352	Explorer.EXE
1352	Explorer.EXE

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

28095361.exeExplorer.EXEcmd.exe

description	pid	process	target process
PID 544 wrote to memory of 1772	544	28095361.exe	CasPol.exe
PID 544 wrote to memory of 1772	544	28095361.exe	CasPol.exe
PID 544 wrote to memory of 1772	544	28095361.exe	CasPol.exe
PID 544 wrote to memory of 1772	544	28095361.exe	CasPol.exe
PID 544 wrote to memory of 1872	544	28095361.exe	CasPol.exe
PID 544 wrote to memory of 1872	544	28095361.exe	CasPol.exe
PID 544 wrote to memory of 1872	544	28095361.exe	CasPol.exe
PID 544 wrote to memory of 1872	544	28095361.exe	CasPol.exe
PID 544 wrote to memory of 1872	544	28095361.exe	CasPol.exe
PID 544 wrote to memory of 1872	544	28095361.exe	CasPol.exe
PID 544 wrote to memory of 1872	544	28095361.exe	CasPol.exe
PID 1352 wrote to memory of 984	1352	Explorer.EXE	cmd.exe
PID 1352 wrote to memory of 984	1352	Explorer.EXE	cmd.exe
PID 1352 wrote to memory of 984	1352	Explorer.EXE	cmd.exe
PID 1352 wrote to memory of 984	1352	Explorer.EXE	cmd.exe
PID 984 wrote to memory of 624	984	cmd.exe	Firefox.exe
PID 984 wrote to memory of 624	984	cmd.exe	Firefox.exe
PID 984 wrote to memory of 624	984	cmd.exe	Firefox.exe
PID 984 wrote to memory of 624	984	cmd.exe	Firefox.exe
PID 984 wrote to memory of 624	984	cmd.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1352

C:\Users\Admin\AppData\Local\Temp\28095361.exe
"C:\Users\Admin\AppData\Local\Temp\28095361.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:544

C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
3⤵
PID:1772

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:1872

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\SysWOW64\cmd.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:984

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:624

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\sqlite3.dll
Filesize
922KB

MD5
dda1b03a5cd2ca37c96b7daf5e3a8ed7

SHA1
c70e5f58e61980d39608f0795879bf012dbbbca2

SHA256
79f86c1edbbc69652a03a0f5667b3985bcf1e19f16fa3b8c7934e5b97ab8586d

SHA512
bf83648c9b5d6d65b2c8409d262a1b7421d2cb13d6c759ec5f352c2d1c5adff3ee2395250fbdfe3590f25fe96bf6b40c2d82a8e7eecaab03be2e6a398e83981f

Download Submit
memory/544-55-0x00000000005D0000-0x0000000000642000-memory.dmp

Filesize
456KB

Download
memory/544-54-0x0000000000800000-0x0000000000874000-memory.dmp

Filesize
464KB

Download
memory/984-65-0x0000000000000000-mapping.dmp

Download
memory/984-72-0x0000000075A91000-0x0000000075A93000-memory.dmp

Filesize
8KB

Download
memory/984-71-0x0000000000080000-0x00000000000AD000-memory.dmp

Filesize
180KB

Download
memory/984-69-0x0000000001ED0000-0x0000000001F5F000-memory.dmp

Filesize
572KB

Download
memory/984-68-0x0000000001F90000-0x0000000002293000-memory.dmp

Filesize
3.0MB

Download
memory/984-67-0x0000000000080000-0x00000000000AD000-memory.dmp

Filesize
180KB

Download
memory/984-66-0x000000004A3A0000-0x000000004A3EC000-memory.dmp

Filesize
304KB

Download
memory/1352-70-0x0000000004C70000-0x0000000004DD7000-memory.dmp

Filesize
1.4MB

Download
memory/1352-64-0x0000000004B20000-0x0000000004C62000-memory.dmp

Filesize
1.3MB

Download
memory/1352-73-0x0000000004C70000-0x0000000004DD7000-memory.dmp

Filesize
1.4MB

Download
memory/1872-63-0x00000000001B0000-0x00000000001C0000-memory.dmp

Filesize
64KB

Download
memory/1872-62-0x00000000008D0000-0x0000000000BD3000-memory.dmp

Filesize
3.0MB

Download
memory/1872-61-0x0000000000401000-0x000000000042F000-memory.dmp

Filesize
184KB

Download
memory/1872-60-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1872-59-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1872-57-0x00000000004012B0-mapping.dmp

Download
memory/1872-56-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads