tofsee | ab13a459f15b1c218389383542076efa884ad26d5d4898b3d1dd3ba108bfbe6e

General

Target

ab13a459f15b1c218389383542076efa884ad26d5d4898b3d1dd3ba108bfbe6e.exe
Size

13.1MB
MD5

bb4ee97079a9375e48c5796cdf6b92a3
SHA1

221dc8709cc35985dbaaf43974ba3d137d1f486a
SHA256

ab13a459f15b1c218389383542076efa884ad26d5d4898b3d1dd3ba108bfbe6e
SHA512

ac910d13a6694e496d6d49a0f20598fdfdea38e09134bf08e156525f2da612e58a454142cf1fe817eb11ca1d05cbf4794db0486e54bb8b1937b08b18e08e960b
SSDEEP

393216:455555555555555555555555555555555555555555555555555555555555555k:4555555555555555555555555555555k

Score

10^/10

tofsee discovery evasion execution persistence trojan

Malware Config

Extracted

Family

tofsee

C2

quadoil.ru

lakeflex.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Tofsee family
tofsee
Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1520	netsh.exe

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
2776	sc.exe
2472	sc.exe
2068	sc.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4356	1296	WerFault.exe	82
4656	2864	WerFault.exe	100

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ab13a459f15b1c218389383542076efa884ad26d5d4898b3d1dd3ba108bfbe6e.exe

C:\Users\Admin\AppData\Local\Temp\ab13a459f15b1c218389383542076efa884ad26d5d4898b3d1dd3ba108bfbe6e.exe
"C:\Users\Admin\AppData\Local\Temp\ab13a459f15b1c218389383542076efa884ad26d5d4898b3d1dd3ba108bfbe6e.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:1296
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zimvuxfp\
  2⤵
  PID:3340
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\isxkrmla.exe" C:\Windows\SysWOW64\zimvuxfp\
  2⤵
  PID:1108
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zimvuxfp binPath= "C:\Windows\SysWOW64\zimvuxfp\isxkrmla.exe /d\"C:\Users\Admin\AppData\Local\Temp\ab13a459f15b1c218389383542076efa884ad26d5d4898b3d1dd3ba108bfbe6e.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2472
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zimvuxfp "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2068
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zimvuxfp
  2⤵
  - Launches sc.exe
  PID:2776
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  PID:1520
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1296 -s 656
  2⤵
  - Program crash
  PID:4356

C:\Windows\SysWOW64\zimvuxfp\isxkrmla.exe
C:\Windows\SysWOW64\zimvuxfp\isxkrmla.exe /d"C:\Users\Admin\AppData\Local\Temp\ab13a459f15b1c218389383542076efa884ad26d5d4898b3d1dd3ba108bfbe6e.exe"
1⤵
PID:2864
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  PID:3296
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2864 -s 512
  2⤵
  - Program crash
  PID:4656

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1296 -ip 1296
1⤵
PID:2556

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 2864 -ip 2864
1⤵
PID:452

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

1

T1562.004

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\isxkrmla.exe

Filesize
2.9MB

MD5
dd7751851e5728858364b4cfa203d128

SHA1
f6579de4676d4b6f79c6fb938c4a3e0ebcfc338e

SHA256
1c17ff7519377ab36d088c518cb0d008b97bb7a09f1677ef6a81b6bf3a3b20fc

SHA512
35ed7d4a1abbea22a41553c9c69f12c69503df37d9feeb9ecc5fad858b33bacda0c9408c1193033cae6c2d732b1d0c80a2fb2f4c52f4afae9068997a297861fc

Download Submit
C:\Windows\SysWOW64\zimvuxfp\isxkrmla.exe

Filesize
2.4MB

MD5
7188b5b845bcec20baa3c540f6f59d47

SHA1
6cad161beb3ed56e17dbe4cf4642392cd52ff9d5

SHA256
74ea7c605d578485a34e87004f67180c70634fb6232fb65fe471174920da5bd4

SHA512
5a644cb83c861ab8b3180a57bf6ef5789158731fe306215347d2dfef330ba29349060eb6eb041aec40c0090cd98016275f1fcc3462116e412f17185b4701eb33

Download Submit
memory/1296-9-0x0000000000660000-0x0000000000673000-memory.dmp

Filesize
76KB

Download
memory/1296-1-0x00000000006A0000-0x00000000007A0000-memory.dmp

Filesize
1024KB

Download
memory/1296-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1296-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1296-2-0x0000000000660000-0x0000000000673000-memory.dmp

Filesize
76KB

Download
memory/1296-8-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2864-12-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2864-18-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2864-11-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2864-13-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/3296-16-0x0000000000F00000-0x0000000000F15000-memory.dmp

Filesize
84KB

Download
memory/3296-17-0x0000000000F00000-0x0000000000F15000-memory.dmp

Filesize
84KB

Download
memory/3296-14-0x0000000000F00000-0x0000000000F15000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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