tofsee | 94f8d13f54940706972abc5eac4ce0c559fafa2b4c9f17ce14fe2e368ee5a203

Analysis

max time kernel
144s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
15/04/2024, 21:46

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General

Target
f1fef622821788beb88015c369117693_JaffaCakes118.exe
Size 13.1MB
Sample240415-1mphvabc8w
SHA256 94f8d13f54940706972abc5eac4ce0c559fafa2b4c9f17ce14fe2e368ee5a203
MD5 f1fef622821788beb88015c369117693
SHA1 63b323c8ca7c73beec434ba9f30d98dc4bec9e87
SHA512 d08c4c2a533bcc40e139ec15e2edc45d9d16cdd3c9a317f545a9e7affb881c2776097c6ccde17deb303adefeb86f36eea9142713012bca2ec2c2dc6219b37aaa
SSDEEP 98304:12UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUk:1
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7
lazystax.ru

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
4420	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\okwunlp\ImagePath = "C:\\Windows\\SysWOW64\\okwunlp\\iyexygwf.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	f1fef622821788beb88015c369117693_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4624	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1380	iyexygwf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1380 set thread context of 4624	1380	iyexygwf.exe	107

Launches sc.exe 3 IoCs

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

pid	Process
4244	sc.exe
4440	sc.exe
892	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
2500	4820	WerFault.exe	91
1660	1380	WerFault.exe	102

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4820 wrote to memory of 5060	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	92
PID 4820 wrote to memory of 5060	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	92
PID 4820 wrote to memory of 5060	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	92
PID 4820 wrote to memory of 1364	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	94
PID 4820 wrote to memory of 1364	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	94
PID 4820 wrote to memory of 1364	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	94
PID 4820 wrote to memory of 4244	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	96
PID 4820 wrote to memory of 4244	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	96
PID 4820 wrote to memory of 4244	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	96
PID 4820 wrote to memory of 4440	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	98
PID 4820 wrote to memory of 4440	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	98
PID 4820 wrote to memory of 4440	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	98
PID 4820 wrote to memory of 892	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	100
PID 4820 wrote to memory of 892	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	100
PID 4820 wrote to memory of 892	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	100
PID 4820 wrote to memory of 4420	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	103
PID 4820 wrote to memory of 4420	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	103
PID 4820 wrote to memory of 4420	4820	f1fef622821788beb88015c369117693_JaffaCakes118.exe	103
PID 1380 wrote to memory of 4624	1380	iyexygwf.exe	107
PID 1380 wrote to memory of 4624	1380	iyexygwf.exe	107
PID 1380 wrote to memory of 4624	1380	iyexygwf.exe	107
PID 1380 wrote to memory of 4624	1380	iyexygwf.exe	107
PID 1380 wrote to memory of 4624	1380	iyexygwf.exe	107

C:\Users\Admin\AppData\Local\Temp\f1fef622821788beb88015c369117693_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f1fef622821788beb88015c369117693_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4820
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\okwunlp\
  2⤵
  PID:5060
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iyexygwf.exe" C:\Windows\SysWOW64\okwunlp\
  2⤵
  PID:1364
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create okwunlp binPath= "C:\Windows\SysWOW64\okwunlp\iyexygwf.exe /d\"C:\Users\Admin\AppData\Local\Temp\f1fef622821788beb88015c369117693_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4244
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description okwunlp "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4440
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start okwunlp
  2⤵
  - Launches sc.exe
  PID:892
- 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:4420
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4820 -s 1040
  2⤵
  - Program crash
  PID:2500

C:\Windows\SysWOW64\okwunlp\iyexygwf.exe
C:\Windows\SysWOW64\okwunlp\iyexygwf.exe /d"C:\Users\Admin\AppData\Local\Temp\f1fef622821788beb88015c369117693_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1380
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4624
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1380 -s 532
  2⤵
  - Program crash
  PID:1660

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4820 -ip 4820
1⤵
PID:5068

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 1380 -ip 1380
1⤵
PID:2772

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=4748 --field-trial-handle=2328,i,5873823382323802923,13134441441264702821,262144 --variations-seed-version /prefetch:8
1⤵
PID:3496

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

iyexygwf.exe

Path C:\Users\Admin\AppData\Local\Temp\iyexygwf.exe
Size 12.3MB
SHA256 862a650390de3ec7f8634d38021ba19b55e06eaef6a0a2ff722e56c43d2fc26b
MD5 7999724f9cabf26ce465e14e1bf9d4c4
SHA1 b5a14d806b0e4586ffdfbad02a53dfc9e30bdd17
SHA512 b4ea5387e1e3eb4780252c06fabf680ac2d85c01509ce81f8dacedaad7e922a633ba04964e1fb77fba8026463c811ead0cab4b944f4e36d40ae82430bc2f1e49
SSDEEP 98304:x2UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUn:x
MD5 SHA1 SHA512 SSDEEP

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memory/1380-10-0x0000000000400000-0x0000000000474000-memory.dmp

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memory/1380-8-0x0000000000800000-0x0000000000900000-memory.dmp

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memory/1380-9-0x0000000000D60000-0x0000000000D73000-memory.dmp

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memory/1380-16-0x0000000000400000-0x0000000000474000-memory.dmp

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memory/4624-12-0x00000000012F0000-0x0000000001305000-memory.dmp

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memory/4624-15-0x00000000012F0000-0x0000000001305000-memory.dmp

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memory/4624-18-0x00000000012F0000-0x0000000001305000-memory.dmp

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memory/4624-19-0x00000000012F0000-0x0000000001305000-memory.dmp

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memory/4624-20-0x00000000012F0000-0x0000000001305000-memory.dmp

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memory/4820-3-0x0000000000400000-0x0000000000474000-memory.dmp

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memory/4820-2-0x0000000000720000-0x0000000000733000-memory.dmp

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memory/4820-1-0x00000000007E0000-0x00000000008E0000-memory.dmp

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memory/4820-11-0x0000000000400000-0x0000000000474000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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