nymaim | 80bc5cf59fa0e901e8e6a46bce2cfe54caebd97c2a1acf4b4a5543b642b8f2b9

Analysis

max time kernel
56s
max time network
60s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
07/10/2022, 19:35

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General

Target
file.exe
Size 397KB
Sample221007-yan1fadebp
SHA256 80bc5cf59fa0e901e8e6a46bce2cfe54caebd97c2a1acf4b4a5543b642b8f2b9
MD5 657aef95d32dd1db1ad7d88585723887
SHA1 9d445ba88d6600320dd6ca55b503ec4e42e68d2e
SHA512 041770731824574af12d8b568c76ee85d6d1014261552f370e802a6cf97d16656b4c3d1da32c181ad499bf1d49d6d0947bbc1abe6366d23043fa5a9b151a382b
SSDEEP 6144:UkZ9HeAIzj0GOuVBHIqQX9DuYscC54o58RZH8x7ITsqe4:UkD+AIz+unHxiBdvDcx7R4
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

208.67.104.97
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 1 IoCs

pid	Process
1716	VeFdlvwHu.exe

Deletes itself 1 IoCs

pid	Process
1512	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
860	file.exe

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
1832	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
860	file.exe
860	file.exe
860	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1832	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 860 wrote to memory of 1716	860	file.exe	29
PID 860 wrote to memory of 1716	860	file.exe	29
PID 860 wrote to memory of 1716	860	file.exe	29
PID 860 wrote to memory of 1716	860	file.exe	29
PID 860 wrote to memory of 1512	860	file.exe	30
PID 860 wrote to memory of 1512	860	file.exe	30
PID 860 wrote to memory of 1512	860	file.exe	30
PID 860 wrote to memory of 1512	860	file.exe	30
PID 1512 wrote to memory of 1832	1512	cmd.exe	32
PID 1512 wrote to memory of 1832	1512	cmd.exe	32
PID 1512 wrote to memory of 1832	1512	cmd.exe	32
PID 1512 wrote to memory of 1832	1512	cmd.exe	32

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:860
- C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\VeFdlvwHu.exe
  2⤵
  - Executes dropped EXE
  PID:1716
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1512
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1832

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

VeFdlvwHu.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\VeFdlvwHu.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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VeFdlvwHu.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\VeFdlvwHu.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/860-57-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/860-54-0x0000000074DE1000-0x0000000074DE3000-memory.dmp

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memory/860-56-0x0000000000470000-0x00000000004C3000-memory.dmp

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memory/860-55-0x00000000002AB000-0x00000000002DC000-memory.dmp

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memory/860-61-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/860-65-0x00000000002AB000-0x00000000002DC000-memory.dmp

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memory/860-66-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/860-68-0x00000000002AB000-0x00000000002DC000-memory.dmp

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memory/860-69-0x0000000000400000-0x0000000000468000-memory.dmp

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