a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c

General

Target

a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe
Size

6KB
MD5

4071b80a44bb81884f23a0ee6271d7fb
SHA1

f46d73df19a6f1817e8c687fae2bc39aaae80afc
SHA256

a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c
SHA512

9404c2161e92dbf72c15b073ba45a3eebcca3d02800c089c9db161daab2cf7e8df6f6ac40a60ececfee25e7fb4423a000848629d8d3cdc704e12b38cf6a9850f
SSDEEP

96:YsQ8fMP4xz0hJd7cTErH8vW5BbTNYi+K5v/ZjBC1e1HwqrkqdiiX:3QUMPezkOCBb9ss1Hwqr1d5X

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2376	tinyproxy1.exe

Modifies Windows Firewall 1 TTPs 3 IoCs

evasion

Modify Existing Service

T1031

pid	Process
864	netsh.exe
4612	netsh.exe
1092	netsh.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/448-133-0x0000000000400000-0x0000000000406000-memory.dmp	upx
behavioral2/files/0x0002000000022657-134.dat	upx
behavioral2/files/0x0002000000022657-138.dat	upx
behavioral2/memory/2376-140-0x0000000000400000-0x0000000000406000-memory.dmp	upx
behavioral2/memory/2376-141-0x0000000000400000-0x0000000000406000-memory.dmp	upx

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\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Windows\CurrentVersion\Run	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tinyproxy = "C:\\Program Files (x86)\\tinyproxy\\tinyproxy1.exe"	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\tinyproxy\tinyproxy1.exe	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe
File opened for modification	C:\Program Files (x86)\tinyproxy\tinyproxy1.exe	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
448	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe
448	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe
2376	tinyproxy1.exe
2376	tinyproxy1.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	448	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe
Token: SeDebugPrivilege	2376	tinyproxy1.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 448 wrote to memory of 864	448	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe	82
PID 448 wrote to memory of 864	448	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe	82
PID 448 wrote to memory of 864	448	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe	82
PID 448 wrote to memory of 4612	448	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe	84
PID 448 wrote to memory of 4612	448	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe	84
PID 448 wrote to memory of 4612	448	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe	84
PID 448 wrote to memory of 1092	448	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe	86
PID 448 wrote to memory of 1092	448	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe	86
PID 448 wrote to memory of 1092	448	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe	86
PID 448 wrote to memory of 2376	448	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe	88
PID 448 wrote to memory of 2376	448	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe	88
PID 448 wrote to memory of 2376	448	a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe	88

C:\Users\Admin\AppData\Local\Temp\a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe
"C:\Users\Admin\AppData\Local\Temp\a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c.exe"
1⤵
- Adds Run key to start application
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:448
- C:\Windows\SysWOW64\netsh.exe
  netsh firewall add allowedprogram "C:\Program Files (x86)\tinyproxy\tinyproxy1.exe" TINYPROXY ENABLE
  2⤵
  - Modifies Windows Firewall
  PID:864
- C:\Windows\SysWOW64\netsh.exe
  netsh firewall add portopening TCP 80 TINYPROXY
  2⤵
  - Modifies Windows Firewall
  PID:4612
- C:\Windows\SysWOW64\netsh.exe
  netsh firewall add portopening TCP 53 TINYPROXY
  2⤵
  - Modifies Windows Firewall
  PID:1092
- C:\Program Files (x86)\tinyproxy\tinyproxy1.exe
  "C:\Program Files (x86)\tinyproxy\tinyproxy1.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2376

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\tinyproxy\tinyproxy1.exe

Filesize
6KB

MD5
4071b80a44bb81884f23a0ee6271d7fb

SHA1
f46d73df19a6f1817e8c687fae2bc39aaae80afc

SHA256
a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c

SHA512
9404c2161e92dbf72c15b073ba45a3eebcca3d02800c089c9db161daab2cf7e8df6f6ac40a60ececfee25e7fb4423a000848629d8d3cdc704e12b38cf6a9850f

Download Submit
C:\Program Files (x86)\tinyproxy\tinyproxy1.exe

Filesize
6KB

MD5
4071b80a44bb81884f23a0ee6271d7fb

SHA1
f46d73df19a6f1817e8c687fae2bc39aaae80afc

SHA256
a5528f9c2461005de047883cb16f1feae811f321224f3e181dcb21b879305b4c

SHA512
9404c2161e92dbf72c15b073ba45a3eebcca3d02800c089c9db161daab2cf7e8df6f6ac40a60ececfee25e7fb4423a000848629d8d3cdc704e12b38cf6a9850f

Download Submit
C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\tkblmjt0.default-release\prefs.js

Filesize
6KB

MD5
daae82458670232b65c45791c32809af

SHA1
242ccc7723802613118afe59fadcae1c00cdc78d

SHA256
f8d2224e460582ddee3b0bf96f78031f410c3383dc8d28e9d2411445962be6c3

SHA512
4f6b743543eb9d9b3984ccfd4a3b22cf71b3f9225d1ce81e032333ad4e2bdc2ad21daf4af9acff2990e573c4d9fe1d9b957a6c562bc78f04b5904ea5847cce92

Download Submit
memory/448-133-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2376-140-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2376-141-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download

Analysis

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