formbook | 8a172200d41e1a9bcd8f3a47627f1ece860228b468e2a93669c3d97d472e0ca6

Analysis

max time kernel
152s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
02/07/2022, 06:20

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General

Target
tmp.exe
Size 578KB
Sample220702-g34sxsdgam
SHA256 8a172200d41e1a9bcd8f3a47627f1ece860228b468e2a93669c3d97d472e0ca6
MD5 026155ed8719e0afd150d83e4eeab1a3
SHA1 7217279c863933b4a7268672d33473efb9d64f23
SHA512 b7fc782897b2adf6f5c50159b3990517df042d96868ce39280051b041e2bc1a58c6e52e2059c3fb4bcbcbf8d957c61ddf9f3a1e3c8548ed40c5012427b67b075
MD5 SHA1 SHA512

Score

10^/10

formbook xloader mpbz loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

Campaign

mpbz

Decoy

AFdStYOhMDze00V1hnjGCf/fp1v4+A==
ZnfAIsHgcxk9kM4Sz7YEifybsGEs
MSKYDNgVeOmIguKRNo3Z4PyUbi0=
NMPAGs7rYQIBpeAr
EfevdW+hVAcBpeAr
Wznp4vEGIOuJFA4a4gxfrw==
6mtbGypV7YGH6zPDuS0nngWbsGEs
7cWVjIuvkhymbTWNPzUb+Pe4hjsDuGboGT7sNg==
L6voycXlAMZ8MMzl6w==
rgMur1GCfl7Exa4=
eocEYQEsq7JBy7KSQ6PEB3tk
6mqjioi05oIbr7UZ8FaqUcWKUFQO2P4=
8vl/8cwBIu5yxkrTwRr9cN+3JA==
Y3biTBVKik/HsAstQiL0EMGgMA==
GxKSTFqREswCckxq40gl
vbck7fUZlLFQ1tuBFxqDEMGgMA==
e9vCiqC4UgYBpeAr
xjNyRCJ/1l7fv7k=
RQzRt6vm+hJCoss5GobK1/yUbi0=
ypxWQkxxdF7Exa4=
aN0f6egVj7NaI0xq40gl
XbqtWEZ5lrqfPoT5zTMx
Jn/DopW4Nlf2hQgX4gxfrw==
lfcqqUtq9I3Qp+4JGhqCEMGgMA==
nO85GOMXwl7Exa4=
qacUYAEiMs5QOTSXWEQP88eaXlQO2P4=
LQeO7pPPbzlOk8kJphBQ/HVO0j0m8icXkfjZ6cAJ
sBlaF+UOprkBpeAr
WTn+3MEFH7MjoX9nCiD+4sehOA==
jgAxIRVCf9VeTQ==
TLKgntFewqHg
5uh1OzdjeF7Exa4=
00iXbF2TPhABpeAr
KLGfCrnpghIcc0xq40gl
IB6bA9L8FDA4I/xYEQDl6PyUbi0=
XJzSQ+BB37Di
nnHhTP0pUPqAHBMb4gxfrw==
LI9/SFlxD94Of+Nq40gl
JamJ4oe6WAQBpeAr
dfEsFsBYf9VeTQ==
/9eOVTt6hBm9peIQ4gxfrw==
SaXy7QcVDp4cA3RjXMYZ5YArpDo=
LjfrvJWxqQLs4s4x4w==
xTuOZwFc6gyyMhY/yVA0pAWbsGEs
zh8k9+8e5a/CB3uvg9o=
c0zPmIbHY8IymNkp
PLq2aklthafpdeNq40gl
yWEZqQYfMg==
Vj7NOfUqf9VeTQ==
FetiJztJdE0LBg5AxzeLqpxmJd/Nm4m1NKQ=
FAWic2GMI0POPSAe4gxfrw==
4cdy7ZG6Qs1tMMzl6w==
UdP/wX6wQtXZOoiwSKHEB3tk
lucgoh62v2qUWg==
at3LNPIp/0xBsGeIhc0=
z7k3gBlGvoJLF0wu
SZbZ0eMSkqcWjeByPvPZMJ8=
Z8PBHc7lmLdHy6RxE4ziu1zV2ZjcnOc=
zs04hBc17Jcm98kh8lafS/yUbi0=
WdH+0KSwgWES/loh7AWXuZc=
KKmqDLXogiFRseNq40gl
7edPAfkownyJ0xFyUzqn9t+pIBKyikjiGT7sNg==
H25eDOMmf9VeTQ==
vCdXP1yBPv//X9II6EyMn45w9X6DCKDj
jalanjalankesurabaya.com

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
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
suricata

Xloader Payload 4 IoCs

rat

resource	yara_rule
behavioral2/memory/1168-136-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/1168-142-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/3788-146-0x0000000000C00000-0x0000000000C2C000-memory.dmp	xloader
behavioral2/memory/3788-149-0x0000000000C00000-0x0000000000C2C000-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

description	ioc	Process
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\VV1LGB8XGVE4 = "C:\\Program Files (x86)\\Wchn\\tjd0gpqgfilg.exe"	svchost.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1008 set thread context of 1168	1008	tmp.exe	92
PID 1168 set thread context of 2728	1168	AddInProcess32.exe	49
PID 3788 set thread context of 2728	3788	svchost.exe	49

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Wchn\tjd0gpqgfilg.exe	svchost.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	svchost.exe

Suspicious behavior: EnumeratesProcesses 44 IoCs

pid	Process
1008	tmp.exe
1008	tmp.exe
1168	AddInProcess32.exe
1168	AddInProcess32.exe
1168	AddInProcess32.exe
1168	AddInProcess32.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2728	Explorer.EXE

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
1168	AddInProcess32.exe
1168	AddInProcess32.exe
1168	AddInProcess32.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe
3788	svchost.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1008	tmp.exe
Token: SeDebugPrivilege	1168	AddInProcess32.exe
Token: SeDebugPrivilege	3788	svchost.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
2728	Explorer.EXE

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1008 wrote to memory of 1168	1008	tmp.exe	92
PID 1008 wrote to memory of 1168	1008	tmp.exe	92
PID 1008 wrote to memory of 1168	1008	tmp.exe	92
PID 1008 wrote to memory of 1168	1008	tmp.exe	92
PID 1008 wrote to memory of 1168	1008	tmp.exe	92
PID 1008 wrote to memory of 1168	1008	tmp.exe	92
PID 2728 wrote to memory of 3788	2728	Explorer.EXE	93
PID 2728 wrote to memory of 3788	2728	Explorer.EXE	93
PID 2728 wrote to memory of 3788	2728	Explorer.EXE	93
PID 3788 wrote to memory of 4248	3788	svchost.exe	94
PID 3788 wrote to memory of 4248	3788	svchost.exe	94
PID 3788 wrote to memory of 4248	3788	svchost.exe	94
PID 3788 wrote to memory of 3352	3788	svchost.exe	96
PID 3788 wrote to memory of 3352	3788	svchost.exe	96
PID 3788 wrote to memory of 3352	3788	svchost.exe	96
PID 3788 wrote to memory of 3360	3788	svchost.exe	98
PID 3788 wrote to memory of 3360	3788	svchost.exe	98
PID 3788 wrote to memory of 3360	3788	svchost.exe	98
PID 3788 wrote to memory of 2512	3788	svchost.exe	100
PID 3788 wrote to memory of 2512	3788	svchost.exe	100
PID 3788 wrote to memory of 2512	3788	svchost.exe	100

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2728
- C:\Users\Admin\AppData\Local\Temp\tmp.exe
  "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1008
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:1168
- C:\Windows\SysWOW64\svchost.exe
  "C:\Windows\SysWOW64\svchost.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:3788
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
    3⤵
    PID:4248
- - 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:3352
- - 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:3360
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:2512

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

DB1

Path C:\Users\Admin\AppData\Local\Temp\DB1
Size 40KB
SHA256 b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf
MD5 b608d407fc15adea97c26936bc6f03f6
SHA1 953e7420801c76393902c0d6bb56148947e41571
SHA512 cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4
SSDEEP 48:2j3WBA+IIYICVEq8MX0D0HSFlNUK6lGNxGt7KLk8s8LKvUf9KVyJ7hU:u2FCn8MZyFlulGNxGt7KLyeymw
MD5 SHA1 SHA512 SSDEEP

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DB1

Path C:\Users\Admin\AppData\Local\Temp\DB1
Size 48KB
SHA256 c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a
MD5 349e6eb110e34a08924d92f6b334801d
SHA1 bdfb289daff51890cc71697b6322aa4b35ec9169
SHA512 2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574
SSDEEP 96:uRMKLyeymwxCn8MZyFlSynlbiXyKwt8hG:uRkxGOXnlbibhG
MD5 SHA1 SHA512 SSDEEP

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memory/1008-131-0x0000000005400000-0x000000000549C000-memory.dmp

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memory/1008-132-0x0000000005A50000-0x0000000005FF4000-memory.dmp

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memory/1008-133-0x0000000005540000-0x00000000055D2000-memory.dmp

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memory/1008-134-0x0000000009620000-0x000000000962A000-memory.dmp

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memory/1008-130-0x00000000008C0000-0x0000000000956000-memory.dmp

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memory/1168-139-0x0000000000AA0000-0x0000000000AB1000-memory.dmp

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memory/1168-138-0x0000000000F70000-0x00000000012BA000-memory.dmp

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memory/1168-142-0x0000000000400000-0x000000000042C000-memory.dmp

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memory/1168-136-0x0000000000400000-0x000000000042C000-memory.dmp

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memory/2728-148-0x00000000089F0000-0x0000000008B77000-memory.dmp

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memory/2728-140-0x00000000087F0000-0x0000000008910000-memory.dmp

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memory/2728-150-0x00000000089F0000-0x0000000008B77000-memory.dmp

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memory/3788-149-0x0000000000C00000-0x0000000000C2C000-memory.dmp

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memory/3788-147-0x00000000014F0000-0x0000000001580000-memory.dmp

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memory/3788-146-0x0000000000C00000-0x0000000000C2C000-memory.dmp

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memory/3788-145-0x0000000001600000-0x000000000194A000-memory.dmp

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memory/3788-144-0x0000000000230000-0x000000000023E000-memory.dmp

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