gozi_ifsb | 943660aff538730507a4e2feb526a1441024ef48e7aaa4515088c80062658f56

General

Target

instruct_06.21.doc
Size

45KB
MD5

b21183bab3178f2dcd753e9d079501d4
SHA1

d4bc00863ed58580f568de4152dade19df2e8a08
SHA256

943660aff538730507a4e2feb526a1441024ef48e7aaa4515088c80062658f56
SHA512

1fff8e91407ed20d885e9d309c72d775295993f0dfc7587d37494ca66c8b6d0fe2343f4972db00ffcec5585a331c18cfcebd2c1082639fe01f696c9f9121a958

Score

10^/10

gozi_ifsb 6000 banker trojan

Malware Config

Extracted

Family

gozi_ifsb

Botnet

6000

C2

authd.feronok.com

app.bighomegl.at

Attributes

build
250204
exe_type
loader
server_id
580

rsa_pubkey.base64

serpent.plain

Signatures

Gozi, Gozi IFSB
Gozi ISFB is a well-known and widely distributed banking trojan.
banker trojan gozi_ifsb

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

regsvr32.exe

description	pid	pid_target	process	target process
Parent C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE is not expected to spawn this process	1828	1980	regsvr32.exe	WINWORD.EXE

Downloads MZ/PE file
Loads dropped DLL 1 IoCs

Processes:

regsvr32.exe

pid process

1828 regsvr32.exe
Drops file in Windows directory 1 IoCs

Processes:

WINWORD.EXE

description ioc process

File opened for modification C:\Windows\Debug\WIA\wiatrace.log WINWORD.EXE
Office loads VBA resources, possible macro or embedded object present

pid	process
1828	regsvr32.exe

description	ioc	process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

WINWORD.EXE

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

WINWORD.EXE

pid process

1208 WINWORD.EXE

Suspicious use of SetWindowsHookEx 18 IoCs

Processes:

WINWORD.EXEWINWORD.EXE

pid	process
1208	WINWORD.EXE
1208	WINWORD.EXE
1208	WINWORD.EXE
1208	WINWORD.EXE
1208	WINWORD.EXE
1208	WINWORD.EXE
1208	WINWORD.EXE
1208	WINWORD.EXE
1208	WINWORD.EXE
1208	WINWORD.EXE
1208	WINWORD.EXE
1208	WINWORD.EXE
1208	WINWORD.EXE
1208	WINWORD.EXE
1208	WINWORD.EXE
1208	WINWORD.EXE
1980	WINWORD.EXE
1980	WINWORD.EXE

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

WINWORD.EXEWINWORD.EXE

description	pid	process	target process
PID 1980 wrote to memory of 1828	1980	WINWORD.EXE	regsvr32.exe
PID 1980 wrote to memory of 1828	1980	WINWORD.EXE	regsvr32.exe
PID 1980 wrote to memory of 1828	1980	WINWORD.EXE	regsvr32.exe
PID 1980 wrote to memory of 1828	1980	WINWORD.EXE	regsvr32.exe
PID 1980 wrote to memory of 1828	1980	WINWORD.EXE	regsvr32.exe
PID 1980 wrote to memory of 1828	1980	WINWORD.EXE	regsvr32.exe
PID 1980 wrote to memory of 1828	1980	WINWORD.EXE	regsvr32.exe
PID 1208 wrote to memory of 1740	1208	WINWORD.EXE	splwow64.exe
PID 1208 wrote to memory of 1740	1208	WINWORD.EXE	splwow64.exe
PID 1208 wrote to memory of 1740	1208	WINWORD.EXE	splwow64.exe
PID 1208 wrote to memory of 1740	1208	WINWORD.EXE	splwow64.exe

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\instruct_06.21.doc"
1⤵
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1208

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
2⤵
PID:1740

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /Automation -Embedding
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1980

C:\Windows\SysWOW64\regsvr32.exe
regsvr32 c:\programdata\leftStructBorder.jpg
2⤵
- Process spawned unexpected child process
- Loads dropped DLL
PID:1828

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:1852

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Office\MSO1033.acl
MD5
26af2941494a3e84960aa48eb13f31a8

SHA1
4bbacbcc973075d7957b4b9c40a9341ef1976a84

SHA256
4fa31d83b5fcde512f9649ee243e0811c59c0f773154d8216f85dcd584e82fcb

SHA512
dfc28e1a593fd30184dfe7b13a0425d598ce75e0d32144998f7ce3098c9cbf5ddd893d75665bdf3c38e9660dcf53c513401361692a4b7126bdaf431143a25d10

Download Submit
\??\c:\programdata\leftStructBorder.jpg
MD5
28a12a56e6727296f8cb5de148a006cd

SHA1
969c92516f04daf3c23fc71160749b0196aca0de

SHA256
e7c2f8fcbe5e55b76a93777362c62fdec9c6e067dae4647b0e135040b32fa39f

SHA512
f60c0e79349fe4a403745a1727c9ff6acdeb43039625ff946f80baea3aa84261da448561a21ed3d720e58ab8d4417b8477167c6a71e6fd39cc031f58a23fcfe6

Download Submit
\ProgramData\leftStructBorder.jpg
MD5
28a12a56e6727296f8cb5de148a006cd

SHA1
969c92516f04daf3c23fc71160749b0196aca0de

SHA256
e7c2f8fcbe5e55b76a93777362c62fdec9c6e067dae4647b0e135040b32fa39f

SHA512
f60c0e79349fe4a403745a1727c9ff6acdeb43039625ff946f80baea3aa84261da448561a21ed3d720e58ab8d4417b8477167c6a71e6fd39cc031f58a23fcfe6

Download Submit
memory/1208-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1208-60-0x000000006FE01000-0x000000006FE03000-memory.dmp

Filesize
8KB

Download
memory/1208-59-0x0000000072381000-0x0000000072384000-memory.dmp

Filesize
12KB

Download
memory/1740-72-0x0000000000000000-mapping.dmp

Download
memory/1740-73-0x000007FEFB881000-0x000007FEFB883000-memory.dmp

Filesize
8KB

Download
memory/1828-66-0x0000000000000000-mapping.dmp

Download
memory/1828-67-0x0000000075561000-0x0000000075563000-memory.dmp

Filesize
8KB

Download
memory/1828-70-0x00000000001B0000-0x0000000000240000-memory.dmp

Filesize
576KB

Download
memory/1828-74-0x00000000001B0000-0x00000000001BD000-memory.dmp

Filesize
52KB

Download
memory/1828-75-0x0000000000350000-0x0000000000351000-memory.dmp

Filesize
4KB

Download
memory/1980-71-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads