formbook | dcc8a16c411d371bf110f3d0bfe6a4224a53810844ef1bc02d3f89f2e02e7c0b

General

Target

tmp.exe
Size

576KB
MD5

4218b9cf266916690af26776acf29627
SHA1

d69e2af929a0d406d7eea8316e9747db1d4a7ff0
SHA256

dcc8a16c411d371bf110f3d0bfe6a4224a53810844ef1bc02d3f89f2e02e7c0b
SHA512

fad04a07efa85b91c64022f0b9b1fefdc80a59cd9127e6c1d750f803e2377c71793f20add0532ab2ed595cc9a98a8c9d522c6c42bc6fc07cfdfd2eddf9954d05
SSDEEP

12288:xWO+lpbKbfO7FoxgcSkgyZyfOL5eJxnS4ta5NG3WlViKY:xWnbKzxgcSkgyZeO0TtWN+

Score

10^/10

formbook dcn0 rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

dcn0

Decoy

ZVx68vDtAMBCwg==

oBMBvsNORkM/O/ox

Ff9pISWkm6eG4lByIspp

c2T42c6CIIF6B8xTxm9XzpVw

bvjhxRbnAC183w==

0lTttSNG4HUDNflyIspp

hPXFlstqiHA/O/ox

WLR+MeerxZ0cNn1ja+IQAYo=

IHRn4xXOVKi477zarG+ObSy7YJA=

Xhf3e+tdAC183w==

Xk0ZAezv2rWH

kngo+vBeSRN7AszNwam3Osmguuqc0MoC

a2Qp7a+E8fSw7LDjpnqEKjsRZA==

3zjy4E7+QM48wg==

YcCmqT3OUNAigVott2pBKiy7YJA=

4+SMeX1juat/5cZ1AZihcyy7YJA=

/+m7sro0OBTl3TMpCw==

i2ctEfe4//a64yklMsgS2J90

+loZ2QKGX0UWgpvErMs=

b9BNCnJWQJS8IfsR0uR3bCy7YJA=

Signatures

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

tmp.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation tmp.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	tmp.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

tmp.exetmp.exechkdsk.exe

description	pid	process	target process
PID 1724 set thread context of 3716	1724	tmp.exe	tmp.exe
PID 3716 set thread context of 652	3716	tmp.exe	Explorer.EXE
PID 4332 set thread context of 652	4332	chkdsk.exe	Explorer.EXE

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

chkdsk.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier chkdsk.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

chkdsk.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 48 IoCs

Processes:

tmp.exechkdsk.exe

pid	process
3716	tmp.exe
3716	tmp.exe
3716	tmp.exe
3716	tmp.exe
3716	tmp.exe
3716	tmp.exe
3716	tmp.exe
3716	tmp.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe
4332	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

652 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

tmp.exechkdsk.exe

pid process

3716 tmp.exe
3716 tmp.exe
3716 tmp.exe
4332 chkdsk.exe
4332 chkdsk.exe
4332 chkdsk.exe
4332 chkdsk.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

tmp.exechkdsk.exe

description pid process

Token: SeDebugPrivilege 3716 tmp.exe
Token: SeDebugPrivilege 4332 chkdsk.exe

pid	process
652	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	3716	tmp.exe
Token: SeDebugPrivilege	4332	chkdsk.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

tmp.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 1724 wrote to memory of 3716	1724	tmp.exe	tmp.exe
PID 1724 wrote to memory of 3716	1724	tmp.exe	tmp.exe
PID 1724 wrote to memory of 3716	1724	tmp.exe	tmp.exe
PID 1724 wrote to memory of 3716	1724	tmp.exe	tmp.exe
PID 1724 wrote to memory of 3716	1724	tmp.exe	tmp.exe
PID 1724 wrote to memory of 3716	1724	tmp.exe	tmp.exe
PID 652 wrote to memory of 4332	652	Explorer.EXE	chkdsk.exe
PID 652 wrote to memory of 4332	652	Explorer.EXE	chkdsk.exe
PID 652 wrote to memory of 4332	652	Explorer.EXE	chkdsk.exe
PID 4332 wrote to memory of 4164	4332	chkdsk.exe	Firefox.exe
PID 4332 wrote to memory of 4164	4332	chkdsk.exe	Firefox.exe
PID 4332 wrote to memory of 4164	4332	chkdsk.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:652

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1724

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3716

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Suspicious use of SetThreadContext
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4332

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:4164

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/652-154-0x0000000002FC0000-0x0000000003082000-memory.dmp

Filesize
776KB

Download
memory/652-152-0x0000000002FC0000-0x0000000003082000-memory.dmp

Filesize
776KB

Download
memory/652-146-0x0000000008260000-0x0000000008389000-memory.dmp

Filesize
1.2MB

Download
memory/1724-132-0x0000000000E40000-0x0000000000ED6000-memory.dmp

Filesize
600KB

Download
memory/1724-133-0x0000000005F00000-0x00000000064A4000-memory.dmp

Filesize
5.6MB

Download
memory/1724-134-0x0000000005870000-0x0000000005902000-memory.dmp

Filesize
584KB

Download
memory/1724-135-0x0000000005920000-0x000000000592A000-memory.dmp

Filesize
40KB

Download
memory/1724-136-0x0000000008290000-0x000000000832C000-memory.dmp

Filesize
624KB

Download
memory/3716-143-0x00000000018B0000-0x0000000001BFA000-memory.dmp

Filesize
3.3MB

Download
memory/3716-138-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/3716-141-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/3716-144-0x0000000000422000-0x0000000000424000-memory.dmp

Filesize
8KB

Download
memory/3716-145-0x0000000001850000-0x0000000001860000-memory.dmp

Filesize
64KB

Download
memory/3716-140-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/3716-137-0x0000000000000000-mapping.dmp

Download
memory/3716-142-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/4332-148-0x0000000000530000-0x000000000053A000-memory.dmp

Filesize
40KB

Download
memory/4332-150-0x0000000001910000-0x0000000001C5A000-memory.dmp

Filesize
3.3MB

Download
memory/4332-151-0x00000000017E0000-0x000000000186F000-memory.dmp

Filesize
572KB

Download
memory/4332-149-0x0000000000F10000-0x0000000000F3D000-memory.dmp

Filesize
180KB

Download
memory/4332-153-0x0000000000F10000-0x0000000000F3D000-memory.dmp

Filesize
180KB

Download
memory/4332-147-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads