formbook | d0868cfa2f8d12b1f4fec7473e5f0baad751b77caf178aef546e5126b60278ab

General

Target

INV000827365678.exe
Size

436KB
MD5

b41b1dcba357b9cae74f5a3a06d5faf4
SHA1

3bcacaad8622d6a0a3463060c1f4ac7416c0affc
SHA256

d0868cfa2f8d12b1f4fec7473e5f0baad751b77caf178aef546e5126b60278ab
SHA512

8f43eebaf082c6b9ba561c28b1abd1f04409e38b7c3ae182c7af0dc8a8578fab743e67773ba4282d9a1c5b409489f46da0979e328c30734d9670dae05890015f
SSDEEP

12288:9rY1Dr2ChdBjliyVAxTG3ilBB8WShCmaqpyGTYBVhm:hY1Dr2ChNVAwSNKCmay

Score

10^/10

formbook xloader zzun loader persistence rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

zzun

Decoy

JnNtRHyNupy0GqRzAcasu7hb4rc=

Qv593NGLE7p9UNSaVkPXljAJm2QCNnc=

ePArIFWvjkkMgVEVhw4M4Jk=

26rqUwJ7dD0AiDI=

pBAxMHeK741QFw==

kHD7TPt5846pUMTX

56UnjFjHL1i0j659h3LymRnHpQj+SshC

4vKlKHflPqmWXRbrRwfPtrhb4rc=

6LBd4qButFAi

phMzGll8Ue7Fu+inq5cdnPaSugG3

NKswiQGCvZoG5FgsdHEI

rtTHnuUY8M1qVcXV

SOmECrlAt2oGAA==

L1ep9adutFAi

/UE+/AyvE6uEl28weFI=

IP+xMPQxJR4NE6TK

xvW5GN9/rqA5YUoOVt185Sf7Uw==

fRFNW9DhxL6VF7LA

KFYTfkaY741QFw==

W4JGvMBmt2oGAA==

Extracted

Family

xloader

Version

2.9

Campaign

zzun

Decoy

JnNtRHyNupy0GqRzAcasu7hb4rc=

Qv593NGLE7p9UNSaVkPXljAJm2QCNnc=

ePArIFWvjkkMgVEVhw4M4Jk=

26rqUwJ7dD0AiDI=

pBAxMHeK741QFw==

kHD7TPt5846pUMTX

56UnjFjHL1i0j659h3LymRnHpQj+SshC

4vKlKHflPqmWXRbrRwfPtrhb4rc=

6LBd4qButFAi

phMzGll8Ue7Fu+inq5cdnPaSugG3

NKswiQGCvZoG5FgsdHEI

rtTHnuUY8M1qVcXV

SOmECrlAt2oGAA==

L1ep9adutFAi

/UE+/AyvE6uEl28weFI=

IP+xMPQxJR4NE6TK

xvW5GN9/rqA5YUoOVt185Sf7Uw==

fRFNW9DhxL6VF7LA

KFYTfkaY741QFw==

W4JGvMBmt2oGAA==

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader

Xloader payload 5 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4860-134-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/4860-135-0x000000000041F6F0-mapping.dmp	xloader
behavioral2/memory/4860-142-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/1736-144-0x00000000009B0000-0x00000000009DC000-memory.dmp	xloader
behavioral2/memory/1736-148-0x00000000009B0000-0x00000000009DC000-memory.dmp	xloader

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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

systray.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\6LL07BMXCN = "C:\\Program Files (x86)\\Zhdolxf\\6lbxnzyz-0nbm.exe"	systray.exe
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	systray.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

INV000827365678.exeCasPol.exesystray.exe

description	pid	process	target process
PID 1408 set thread context of 4860	1408	INV000827365678.exe	CasPol.exe
PID 4860 set thread context of 780	4860	CasPol.exe	Explorer.EXE
PID 1736 set thread context of 780	1736	systray.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

systray.exe

description ioc process

File opened for modification C:\Program Files (x86)\Zhdolxf\6lbxnzyz-0nbm.exe systray.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Zhdolxf\6lbxnzyz-0nbm.exe	systray.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

systray.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	systray.exe

Suspicious behavior: EnumeratesProcesses 56 IoCs

Processes:

INV000827365678.exeCasPol.exesystray.exe

pid	process
1408	INV000827365678.exe
1408	INV000827365678.exe
4860	CasPol.exe
4860	CasPol.exe
4860	CasPol.exe
4860	CasPol.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

780 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

CasPol.exesystray.exe

pid process

4860 CasPol.exe
4860 CasPol.exe
4860 CasPol.exe
1736 systray.exe
1736 systray.exe
1736 systray.exe
1736 systray.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

INV000827365678.exeCasPol.exesystray.exe

description pid process

Token: SeDebugPrivilege 1408 INV000827365678.exe
Token: SeDebugPrivilege 4860 CasPol.exe
Token: SeDebugPrivilege 1736 systray.exe

pid	process
780	Explorer.EXE

pid	process
4860	CasPol.exe
4860	CasPol.exe
4860	CasPol.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe
1736	systray.exe

description	pid	process
Token: SeDebugPrivilege	1408	INV000827365678.exe
Token: SeDebugPrivilege	4860	CasPol.exe
Token: SeDebugPrivilege	1736	systray.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

INV000827365678.exeExplorer.EXEsystray.exe

description	pid	process	target process
PID 1408 wrote to memory of 4860	1408	INV000827365678.exe	CasPol.exe
PID 1408 wrote to memory of 4860	1408	INV000827365678.exe	CasPol.exe
PID 1408 wrote to memory of 4860	1408	INV000827365678.exe	CasPol.exe
PID 1408 wrote to memory of 4860	1408	INV000827365678.exe	CasPol.exe
PID 1408 wrote to memory of 4860	1408	INV000827365678.exe	CasPol.exe
PID 1408 wrote to memory of 4860	1408	INV000827365678.exe	CasPol.exe
PID 780 wrote to memory of 1736	780	Explorer.EXE	systray.exe
PID 780 wrote to memory of 1736	780	Explorer.EXE	systray.exe
PID 780 wrote to memory of 1736	780	Explorer.EXE	systray.exe
PID 1736 wrote to memory of 4436	1736	systray.exe	cmd.exe
PID 1736 wrote to memory of 4436	1736	systray.exe	cmd.exe
PID 1736 wrote to memory of 4436	1736	systray.exe	cmd.exe
PID 1736 wrote to memory of 4500	1736	systray.exe	cmd.exe
PID 1736 wrote to memory of 4500	1736	systray.exe	cmd.exe
PID 1736 wrote to memory of 4500	1736	systray.exe	cmd.exe
PID 1736 wrote to memory of 3884	1736	systray.exe	cmd.exe
PID 1736 wrote to memory of 3884	1736	systray.exe	cmd.exe
PID 1736 wrote to memory of 3884	1736	systray.exe	cmd.exe
PID 1736 wrote to memory of 3428	1736	systray.exe	Firefox.exe
PID 1736 wrote to memory of 3428	1736	systray.exe	Firefox.exe
PID 1736 wrote to memory of 3428	1736	systray.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:780

C:\Users\Admin\AppData\Local\Temp\INV000827365678.exe
"C:\Users\Admin\AppData\Local\Temp\INV000827365678.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1408

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:4860

C:\Windows\SysWOW64\systray.exe
"C:\Windows\SysWOW64\systray.exe"
2⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1736

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
3⤵
PID:4436

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:4500

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:3884

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:3428

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

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\DB1
Filesize
40KB

MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\DB1
Filesize
48KB

MD5
349e6eb110e34a08924d92f6b334801d

SHA1
bdfb289daff51890cc71697b6322aa4b35ec9169

SHA256
c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a

SHA512
2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574

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memory/780-147-0x0000000007E70000-0x0000000007FCD000-memory.dmp

Filesize
1.4MB

Download
memory/780-151-0x0000000002700000-0x00000000027E9000-memory.dmp

Filesize
932KB

Download
memory/780-150-0x0000000002700000-0x00000000027E9000-memory.dmp

Filesize
932KB

Download
memory/780-140-0x0000000007E70000-0x0000000007FCD000-memory.dmp

Filesize
1.4MB

Download
memory/1408-133-0x00007FF8A9BD0000-0x00007FF8AA691000-memory.dmp

Filesize
10.8MB

Download
memory/1408-136-0x00007FF8A9BD0000-0x00007FF8AA691000-memory.dmp

Filesize
10.8MB

Download
memory/1408-132-0x000002E1BFD40000-0x000002E1BFDB2000-memory.dmp

Filesize
456KB

Download
memory/1736-148-0x00000000009B0000-0x00000000009DC000-memory.dmp

Filesize
176KB

Download
memory/1736-149-0x0000000002930000-0x00000000029C0000-memory.dmp

Filesize
576KB

Download
memory/1736-144-0x00000000009B0000-0x00000000009DC000-memory.dmp

Filesize
176KB

Download
memory/1736-145-0x0000000002B00000-0x0000000002E4A000-memory.dmp

Filesize
3.3MB

Download
memory/1736-141-0x0000000000000000-mapping.dmp

Download
memory/1736-143-0x0000000000C60000-0x0000000000C66000-memory.dmp

Filesize
24KB

Download
memory/3884-154-0x0000000000000000-mapping.dmp

Download
memory/4436-146-0x0000000000000000-mapping.dmp

Download
memory/4500-152-0x0000000000000000-mapping.dmp

Download
memory/4860-138-0x00000000011F0000-0x000000000153A000-memory.dmp

Filesize
3.3MB

Download
memory/4860-139-0x0000000001540000-0x0000000001551000-memory.dmp

Filesize
68KB

Download
memory/4860-135-0x000000000041F6F0-mapping.dmp

Download
memory/4860-142-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/4860-134-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads