tofsee | e87a5c719ac7af99f1478732889d5df0a275315b42b3b9aecc8b91333bd9c0af

General

Target

f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe
Size

268KB
MD5

f855c178ba66fef7013303cca97a1a4e
SHA1

26756ba97d394b418af1a6772a226ff2f2c18b55
SHA256

e87a5c719ac7af99f1478732889d5df0a275315b42b3b9aecc8b91333bd9c0af
SHA512

2ede9d6202ab29b1724fa57d3ecc947bf6fe45c1052aefdd70a6f6f53dd9e3e0ed785faaf7e05eb46fa56c327a355b92b3f2b219f0affa85d31c192b29cd2531
SSDEEP

6144:jqs4O6bVLJnq2splH1e24EafBw0+8WloM+nCbVV:1sZL0dfJ4EaZZ+9oM+nmV

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4272	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\lvsxnppk\ImagePath = "C:\\Windows\\SysWOW64\\lvsxnppk\\umrryqko.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4476	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1072	umrryqko.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1072 set thread context of 4476	1072	umrryqko.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
4512	sc.exe
8	sc.exe
1436	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
1804	628	WerFault.exe	90
3744	1072	WerFault.exe	104

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 628 wrote to memory of 2912	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	91
PID 628 wrote to memory of 2912	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	91
PID 628 wrote to memory of 2912	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	91
PID 628 wrote to memory of 4232	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	118
PID 628 wrote to memory of 4232	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	118
PID 628 wrote to memory of 4232	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	118
PID 628 wrote to memory of 1436	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	95
PID 628 wrote to memory of 1436	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	95
PID 628 wrote to memory of 1436	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	95
PID 628 wrote to memory of 4512	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	97
PID 628 wrote to memory of 4512	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	97
PID 628 wrote to memory of 4512	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	97
PID 628 wrote to memory of 8	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	99
PID 628 wrote to memory of 8	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	99
PID 628 wrote to memory of 8	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	99
PID 628 wrote to memory of 4272	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	101
PID 628 wrote to memory of 4272	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	101
PID 628 wrote to memory of 4272	628	f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe	101
PID 1072 wrote to memory of 4476	1072	umrryqko.exe	108
PID 1072 wrote to memory of 4476	1072	umrryqko.exe	108
PID 1072 wrote to memory of 4476	1072	umrryqko.exe	108
PID 1072 wrote to memory of 4476	1072	umrryqko.exe	108
PID 1072 wrote to memory of 4476	1072	umrryqko.exe	108

C:\Users\Admin\AppData\Local\Temp\f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:628
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lvsxnppk\
  2⤵
  PID:2912
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\umrryqko.exe" C:\Windows\SysWOW64\lvsxnppk\
  2⤵
  PID:4232
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lvsxnppk binPath= "C:\Windows\SysWOW64\lvsxnppk\umrryqko.exe /d\"C:\Users\Admin\AppData\Local\Temp\f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1436
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lvsxnppk "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4512
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lvsxnppk
  2⤵
  - Launches sc.exe
  PID:8
- 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:4272
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 628 -s 1204
  2⤵
  - Program crash
  PID:1804

C:\Windows\SysWOW64\lvsxnppk\umrryqko.exe
C:\Windows\SysWOW64\lvsxnppk\umrryqko.exe /d"C:\Users\Admin\AppData\Local\Temp\f855c178ba66fef7013303cca97a1a4e_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1072
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4476
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1072 -s 520
  2⤵
  - Program crash
  PID:3744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 628 -ip 628
1⤵
PID:4076

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 1072 -ip 1072
1⤵
PID:700

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=756 --field-trial-handle=2248,i,10247514684337323751,15511974759131734137,262144 --variations-seed-version /prefetch:8
1⤵
PID:4232

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
7.3MB

MD5
ff5e0efba609b1678240fe358aef0bf8

SHA1
0892171dd77e769ed2e565eb68fa657de6cb9416

SHA256
1ed26b6128aabcbb763a84f4d5910b23a6257d98a6a0916bff0e3b90c266678b

SHA512
130b6ac040b84af48c893038fbd43971766f27aa2086812d7e3cf3dae695eebc8d4d6676a0dc6949ca1f09678aaaa7f6c8615f678794da9c8a6d3a8a9c4a8fc3

Download Submit
C:\Windows\SysWOW64\lvsxnppk\umrryqko.exe

Filesize
8.8MB

MD5
2bf13e8524c23823e37f0d8ceef15b27

SHA1
a98e0483f93c220f799f255f2298c21cd544abd1

SHA256
5e2449dff82b61a531f4a015e6f188c3a6e92ee8c5e618e7e15e3f07a73d9674

SHA512
2484965ddc53f1c7bdb9a5230e96376b70e234f087d90f495bba7c28b0a3095bb80a9fcc6b6c49d04bc96d5f75b2bc2aa67b6faf2ad16b5dd05ce9a3d920ad4d

Download Submit
memory/628-8-0x0000000000400000-0x00000000023AD000-memory.dmp

Filesize
31.7MB

Download
memory/628-4-0x0000000000400000-0x00000000023AD000-memory.dmp

Filesize
31.7MB

Download
memory/628-2-0x0000000002500000-0x0000000002513000-memory.dmp

Filesize
76KB

Download
memory/628-1-0x00000000025C0000-0x00000000026C0000-memory.dmp

Filesize
1024KB

Download
memory/628-12-0x0000000002500000-0x0000000002513000-memory.dmp

Filesize
76KB

Download
memory/1072-14-0x00000000025C0000-0x00000000026C0000-memory.dmp

Filesize
1024KB

Download
memory/1072-17-0x0000000000400000-0x00000000023AD000-memory.dmp

Filesize
31.7MB

Download
memory/1072-21-0x0000000000400000-0x00000000023AD000-memory.dmp

Filesize
31.7MB

Download
memory/4476-10-0x0000000000D20000-0x0000000000D35000-memory.dmp

Filesize
84KB

Download
memory/4476-15-0x0000000000D20000-0x0000000000D35000-memory.dmp

Filesize
84KB

Download
memory/4476-18-0x0000000000D20000-0x0000000000D35000-memory.dmp

Filesize
84KB

Download
memory/4476-19-0x0000000000D20000-0x0000000000D35000-memory.dmp

Filesize
84KB

Download
memory/4476-20-0x0000000000D20000-0x0000000000D35000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads