nymaim | be61ee8c798e3c3df395c88d5ede25bd8b2c825792edfce53d424b294675e201

Analysis

max time kernel
91s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
07/10/2022, 06:49

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General

Target
file.exe
Size 395KB
Sample221007-hlb71scacp
SHA256 be61ee8c798e3c3df395c88d5ede25bd8b2c825792edfce53d424b294675e201
MD5 fb7d849d607dc657460a5f2c8e9960d2
SHA1 9fd508bbcb3138a2ccbce08a80102b0ede1ffed4
SHA512 a8d4e34163a3462b710f5449bef49a892dd4ae23386e78ca3ab28a922d02120c86c4e2ca9c1894c2b62ff19827335cd2f064e92df8dd415f043a1a7cee183045
SSDEEP 6144:l+HJiCRfI2fb74zmPM2pvnUUmT+bn0bnQXuzbgwunlVwVfU:lqg1Ib7uJmvlNnbXunnilL
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
480	FkMY01xaOlYQ.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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	file.exe

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

System Information Discovery
T1082

Program crash 8 IoCs

pid	pid_target	Process	procid_target
4744	1364	WerFault.exe	80
3272	1364	WerFault.exe	80
860	1364	WerFault.exe	80
3988	1364	WerFault.exe	80
220	1364	WerFault.exe	80
4948	1364	WerFault.exe	80
3168	1364	WerFault.exe	80
4276	1364	WerFault.exe	80

Kills process with taskkill 1 IoCs

evasion

pid	Process
1772	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1364	file.exe
1364	file.exe
1364	file.exe
1364	file.exe
1364	file.exe
1364	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1772	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1364 wrote to memory of 480	1364	file.exe	100
PID 1364 wrote to memory of 480	1364	file.exe	100
PID 1364 wrote to memory of 480	1364	file.exe	100
PID 1364 wrote to memory of 4184	1364	file.exe	106
PID 1364 wrote to memory of 4184	1364	file.exe	106
PID 1364 wrote to memory of 4184	1364	file.exe	106
PID 4184 wrote to memory of 1772	4184	cmd.exe	108
PID 4184 wrote to memory of 1772	4184	cmd.exe	108
PID 4184 wrote to memory of 1772	4184	cmd.exe	108

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1364
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1364 -s 452
  2⤵
  - Program crash
  PID:4744
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1364 -s 764
  2⤵
  - Program crash
  PID:3272
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1364 -s 804
  2⤵
  - Program crash
  PID:860
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1364 -s 804
  2⤵
  - Program crash
  PID:3988
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1364 -s 764
  2⤵
  - Program crash
  PID:220
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1364 -s 928
  2⤵
  - Program crash
  PID:4948
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1364 -s 928
  2⤵
  - Program crash
  PID:3168
- C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\FkMY01xaOlYQ.exe
  2⤵
  - Executes dropped EXE
  PID:480
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1364 -s 996
  2⤵
  - Program crash
  PID:4276
- 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⤵
  - Suspicious use of WriteProcessMemory
  PID:4184
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1772

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 1364 -ip 1364
1⤵
PID:1144

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 1364 -ip 1364
1⤵
PID:1660

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 1364 -ip 1364
1⤵
PID:904

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 1364 -ip 1364
1⤵
PID:4136

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 1364 -ip 1364
1⤵
PID:320

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 1364 -ip 1364
1⤵
PID:2316

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 1364 -ip 1364
1⤵
PID:4328

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1364 -ip 1364
1⤵
PID:4736

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

FkMY01xaOlYQ.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\FkMY01xaOlYQ.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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FkMY01xaOlYQ.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\FkMY01xaOlYQ.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/1364-133-0x0000000000470000-0x0000000000570000-memory.dmp

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memory/1364-134-0x0000000002060000-0x00000000020B3000-memory.dmp

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memory/1364-135-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/1364-139-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1364-143-0x0000000000470000-0x0000000000570000-memory.dmp

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memory/1364-144-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/1364-146-0x0000000000400000-0x0000000000468000-memory.dmp

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