Malware Analysis Report

2025-01-18 12:41

Sample ID 240403-xnxdashg4w
Target a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118
SHA256 2b1539eebb7c85895026ddcd1e0b062c0d9783d90c7f86236f64f42c2e8d81ea
Tags
formbook dn7r rat spyware stealer trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

2b1539eebb7c85895026ddcd1e0b062c0d9783d90c7f86236f64f42c2e8d81ea

Threat Level: Known bad

The file a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

formbook dn7r rat spyware stealer trojan

Formbook

Formbook payload

Loads dropped DLL

Suspicious use of SetThreadContext

Enumerates physical storage devices

Program crash

Unsigned PE

NSIS installer

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-03 19:00

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

NSIS installer

installer
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-03 19:00

Reported

2024-04-03 19:03

Platform

win7-20240221-en

Max time kernel

117s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe"

Signatures

Formbook

trojan spyware stealer formbook

Formbook payload

rat
Description Indicator Process Target
N/A N/A N/A N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe N/A

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1968 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe
PID 1968 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe
PID 1968 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe
PID 1968 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe
PID 1968 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe
PID 1968 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe
PID 1968 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe"

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nsd18EE.tmp\xztemc.dll

MD5 9c1dba61231005537c4154af2d66b50a
SHA1 8a51892b643ace4c1a99b45e5b03df795b8bb984
SHA256 4f46b2449a7bd7a664b9328f240fc3bfa522e36918a0b672bec3015761d0b67d
SHA512 cd2fbf5b0a67885cd20dfb2fda999c0d9136d34e3c90745d39acf54a5bcf943e8eeb9ea9a53aa179f10aebec84e360582bdaa81604b879a05ef20813533c0ab7

memory/1968-7-0x0000000074B30000-0x0000000074B3A000-memory.dmp

memory/2476-9-0x0000000000400000-0x000000000042F000-memory.dmp

memory/1968-10-0x0000000074B30000-0x0000000074B3A000-memory.dmp

memory/2476-13-0x0000000000990000-0x0000000000C93000-memory.dmp

memory/2476-14-0x0000000000990000-0x0000000000C93000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-03 19:00

Reported

2024-04-03 19:03

Platform

win10v2004-20231215-en

Max time kernel

93s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\a40d9c6f964664b6b5a3ec4ed532df6c_JaffaCakes118.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4968 -ip 4968

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4968 -s 1016

Network

Country Destination Domain Proto
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 241.66.18.2.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 227.97.18.2.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 100.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 147.108.222.173.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 243.108.222.173.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsm3F1D.tmp\xztemc.dll

MD5 9c1dba61231005537c4154af2d66b50a
SHA1 8a51892b643ace4c1a99b45e5b03df795b8bb984
SHA256 4f46b2449a7bd7a664b9328f240fc3bfa522e36918a0b672bec3015761d0b67d
SHA512 cd2fbf5b0a67885cd20dfb2fda999c0d9136d34e3c90745d39acf54a5bcf943e8eeb9ea9a53aa179f10aebec84e360582bdaa81604b879a05ef20813533c0ab7

memory/4968-6-0x00000000746C0000-0x00000000746CA000-memory.dmp

memory/4968-9-0x00000000746C0000-0x00000000746CA000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-04-03 19:00

Reported

2024-04-03 19:03

Platform

win7-20240220-en

Max time kernel

148s

Max time network

124s

Command Line

C:\Windows\Explorer.EXE

Signatures

Formbook

trojan spyware stealer formbook

Formbook payload

rat
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2252 set thread context of 1144 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1144 set thread context of 1208 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\Explorer.EXE
PID 1144 set thread context of 1208 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\Explorer.EXE
PID 2164 set thread context of 1208 N/A C:\Windows\SysWOW64\explorer.exe C:\Windows\Explorer.EXE

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A
N/A N/A C:\Windows\SysWOW64\explorer.exe N/A
N/A N/A C:\Windows\SysWOW64\explorer.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\explorer.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2276 wrote to memory of 2252 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2276 wrote to memory of 2252 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2276 wrote to memory of 2252 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2276 wrote to memory of 2252 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2276 wrote to memory of 2252 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2276 wrote to memory of 2252 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2276 wrote to memory of 2252 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 1144 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 1144 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 1144 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 1144 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 1144 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 1144 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 1144 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 1144 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 1144 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 1144 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1208 wrote to memory of 2164 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\explorer.exe
PID 1208 wrote to memory of 2164 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\explorer.exe
PID 1208 wrote to memory of 2164 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\explorer.exe
PID 1208 wrote to memory of 2164 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\explorer.exe
PID 2164 wrote to memory of 2676 N/A C:\Windows\SysWOW64\explorer.exe C:\Windows\SysWOW64\cmd.exe
PID 2164 wrote to memory of 2676 N/A C:\Windows\SysWOW64\explorer.exe C:\Windows\SysWOW64\cmd.exe
PID 2164 wrote to memory of 2676 N/A C:\Windows\SysWOW64\explorer.exe C:\Windows\SysWOW64\cmd.exe
PID 2164 wrote to memory of 2676 N/A C:\Windows\SysWOW64\explorer.exe C:\Windows\SysWOW64\cmd.exe

Processes

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\xztemc.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\xztemc.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\xztemc.dll,#1

C:\Windows\SysWOW64\explorer.exe

"C:\Windows\SysWOW64\explorer.exe"

C:\Windows\SysWOW64\cmd.exe

/c del "C:\Windows\SysWOW64\rundll32.exe"

Network

N/A

Files

memory/2252-0-0x0000000074600000-0x000000007460A000-memory.dmp

memory/2252-1-0x0000000074600000-0x000000007460A000-memory.dmp

memory/2252-2-0x00000000745F0000-0x00000000745FA000-memory.dmp

memory/1144-3-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2252-4-0x00000000745F0000-0x00000000745FA000-memory.dmp

memory/1144-5-0x00000000021A0000-0x00000000024A3000-memory.dmp

memory/1144-9-0x00000000001F0000-0x0000000000205000-memory.dmp

memory/1144-8-0x0000000000400000-0x000000000042F000-memory.dmp

memory/1208-7-0x0000000003160000-0x0000000003260000-memory.dmp

memory/1208-10-0x0000000006260000-0x000000000634F000-memory.dmp

memory/1144-13-0x0000000000400000-0x000000000042F000-memory.dmp

memory/1144-14-0x0000000000230000-0x0000000000245000-memory.dmp

memory/1208-15-0x0000000006410000-0x00000000064D9000-memory.dmp

memory/2164-16-0x0000000000C20000-0x0000000000EA1000-memory.dmp

memory/2164-17-0x0000000000C20000-0x0000000000EA1000-memory.dmp

memory/2164-18-0x0000000000080000-0x00000000000AF000-memory.dmp

memory/2164-19-0x0000000002610000-0x0000000002913000-memory.dmp

memory/2164-20-0x0000000000080000-0x00000000000AF000-memory.dmp

memory/2164-23-0x0000000002480000-0x0000000002514000-memory.dmp

memory/1208-24-0x0000000006410000-0x00000000064D9000-memory.dmp

Analysis: behavioral4

Detonation Overview

Submitted

2024-04-03 19:00

Reported

2024-04-03 19:03

Platform

win10v2004-20240226-en

Max time kernel

149s

Max time network

151s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\xztemc.dll,#1

Signatures

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 624 wrote to memory of 3852 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 624 wrote to memory of 3852 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 624 wrote to memory of 3852 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3852 wrote to memory of 3636 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3852 wrote to memory of 3636 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3852 wrote to memory of 3636 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\xztemc.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\xztemc.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\xztemc.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 227.66.18.2.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 147.108.222.173.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 210.108.222.173.in-addr.arpa udp
US 8.8.8.8:53 211.143.182.52.in-addr.arpa udp

Files

memory/3852-0-0x0000000075920000-0x000000007592A000-memory.dmp

memory/3852-1-0x0000000075920000-0x000000007592A000-memory.dmp