cfc0a606ed085d9d40dce5615e107f52fe691e573fe3fdbc3fcf498ca77ea4a5

Analysis

max time kernel
145s
max time network
152s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
29/10/2022, 00:05

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General

Target

cfc0a606ed085d9d40dce5615e107f52fe691e573fe3fdbc3fcf498ca77ea4a5.exe
Size

499KB
MD5

09f6692b606b2edbc61fe92bf4bda320
SHA1

31d5e3dc9fb7e544e099e5c292aea741661bd7f3
SHA256

cfc0a606ed085d9d40dce5615e107f52fe691e573fe3fdbc3fcf498ca77ea4a5
SHA512

2ad213f3516e1af24ace51069f98aa32e64964cd55123485da19433893b8c44d01e3b6ba8d50236ed8ea8dd988dc214db84778c50ca120ae95a88ae0e080fde0
SSDEEP

6144:ltue4A0NUIvc9VG4ig5W7U2ER0u+GIIIIIIIhIIIIIIIIIIIIIIIUR:lF41qIvcjqgA7UNm5R

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
780	steamwebhelper.exe

Loads dropped DLL 1 IoCs

pid	Process
1288	cfc0a606ed085d9d40dce5615e107f52fe691e573fe3fdbc3fcf498ca77ea4a5.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe"	cfc0a606ed085d9d40dce5615e107f52fe691e573fe3fdbc3fcf498ca77ea4a5.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe"	steamwebhelper.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1288	cfc0a606ed085d9d40dce5615e107f52fe691e573fe3fdbc3fcf498ca77ea4a5.exe
780	steamwebhelper.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1288	cfc0a606ed085d9d40dce5615e107f52fe691e573fe3fdbc3fcf498ca77ea4a5.exe
Token: SeDebugPrivilege	780	steamwebhelper.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1288 wrote to memory of 780	1288	cfc0a606ed085d9d40dce5615e107f52fe691e573fe3fdbc3fcf498ca77ea4a5.exe	27
PID 1288 wrote to memory of 780	1288	cfc0a606ed085d9d40dce5615e107f52fe691e573fe3fdbc3fcf498ca77ea4a5.exe	27
PID 1288 wrote to memory of 780	1288	cfc0a606ed085d9d40dce5615e107f52fe691e573fe3fdbc3fcf498ca77ea4a5.exe	27
PID 1288 wrote to memory of 780	1288	cfc0a606ed085d9d40dce5615e107f52fe691e573fe3fdbc3fcf498ca77ea4a5.exe	27

C:\Users\Admin\AppData\Local\Temp\cfc0a606ed085d9d40dce5615e107f52fe691e573fe3fdbc3fcf498ca77ea4a5.exe
"C:\Users\Admin\AppData\Local\Temp\cfc0a606ed085d9d40dce5615e107f52fe691e573fe3fdbc3fcf498ca77ea4a5.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1288
- C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exe
  "C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:780

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

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exe

Filesize
499KB

MD5
09f6692b606b2edbc61fe92bf4bda320

SHA1
31d5e3dc9fb7e544e099e5c292aea741661bd7f3

SHA256
cfc0a606ed085d9d40dce5615e107f52fe691e573fe3fdbc3fcf498ca77ea4a5

SHA512
2ad213f3516e1af24ace51069f98aa32e64964cd55123485da19433893b8c44d01e3b6ba8d50236ed8ea8dd988dc214db84778c50ca120ae95a88ae0e080fde0

Download Submit
C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exe

Filesize
499KB

MD5
09f6692b606b2edbc61fe92bf4bda320

SHA1
31d5e3dc9fb7e544e099e5c292aea741661bd7f3

SHA256
cfc0a606ed085d9d40dce5615e107f52fe691e573fe3fdbc3fcf498ca77ea4a5

SHA512
2ad213f3516e1af24ace51069f98aa32e64964cd55123485da19433893b8c44d01e3b6ba8d50236ed8ea8dd988dc214db84778c50ca120ae95a88ae0e080fde0

Download Submit
\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exe

Filesize
499KB

MD5
09f6692b606b2edbc61fe92bf4bda320

SHA1
31d5e3dc9fb7e544e099e5c292aea741661bd7f3

SHA256
cfc0a606ed085d9d40dce5615e107f52fe691e573fe3fdbc3fcf498ca77ea4a5

SHA512
2ad213f3516e1af24ace51069f98aa32e64964cd55123485da19433893b8c44d01e3b6ba8d50236ed8ea8dd988dc214db84778c50ca120ae95a88ae0e080fde0

Download Submit
memory/780-62-0x0000000000ED0000-0x0000000000F52000-memory.dmp

Filesize
520KB

Download
memory/1288-54-0x0000000000040000-0x00000000000C2000-memory.dmp

Filesize
520KB

Download
memory/1288-55-0x0000000000690000-0x00000000006C8000-memory.dmp

Filesize
224KB

Download
memory/1288-56-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1288-57-0x00000000752B1000-0x00000000752B3000-memory.dmp

Filesize
8KB

Download