nymaim | 49c6e4c85333d50090a51d3d95bbc2ecda4e461dcb0f14f5ca730ebf540f1f9f

Analysis

max time kernel
108s
max time network
137s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
27/09/2022, 21:36

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General

Target
file.exe
Size 415KB
Sample220927-1fwzcaefc4
SHA256 49c6e4c85333d50090a51d3d95bbc2ecda4e461dcb0f14f5ca730ebf540f1f9f
MD5 2bbd5e6de0a79d3bc3b76f0b996141f9
SHA1 5260c1e39da5ed84fb1d5d232f4ce5d07901a40f
SHA512 05a5478f2c4522bf336d17dd61bceb18b8cbb194c1e5cd2b6e96856efceee434958ca29114b9cf7738da1d70218f2772fb2eb9933cea0211e521d29fe5986fe9
SSDEEP 6144:cwa7zbKs6fHNJj8+oJa4HnQ6J0kurPG+tMnbMaLVA0k0PnigabwVfs:cwa7zWpft7F4HnbJ0tMnwgPiB
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
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
4756	Cleaner.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	file.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 12 IoCs

pid	pid_target	Process	procid_target
3336	812	WerFault.exe	83
5060	812	WerFault.exe	83
4860	812	WerFault.exe	83
5100	812	WerFault.exe	83
4648	812	WerFault.exe	83
5064	812	WerFault.exe	83
2992	812	WerFault.exe	83
4184	812	WerFault.exe	83
3064	812	WerFault.exe	83
5060	812	WerFault.exe	83
3660	812	WerFault.exe	83
2992	812	WerFault.exe	83

Kills process with taskkill 1 IoCs

evasion

pid	Process
4552	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
812	file.exe
812	file.exe
812	file.exe
812	file.exe
812	file.exe
812	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
812	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4756	Cleaner.exe
Token: SeDebugPrivilege	4552	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 812 wrote to memory of 2396	812	file.exe	109
PID 812 wrote to memory of 2396	812	file.exe	109
PID 812 wrote to memory of 2396	812	file.exe	109
PID 2396 wrote to memory of 4756	2396	cmd.exe	111
PID 2396 wrote to memory of 4756	2396	cmd.exe	111
PID 812 wrote to memory of 4252	812	file.exe	127
PID 812 wrote to memory of 4252	812	file.exe	127
PID 812 wrote to memory of 4252	812	file.exe	127
PID 4252 wrote to memory of 4552	4252	cmd.exe	131
PID 4252 wrote to memory of 4552	4252	cmd.exe	131
PID 4252 wrote to memory of 4552	4252	cmd.exe	131

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 behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:812
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 812 -s 456
  2⤵
  - Program crash
  PID:3336
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 812 -s 764
  2⤵
  - Program crash
  PID:5060
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 812 -s 764
  2⤵
  - Program crash
  PID:4860
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 812 -s 812
  2⤵
  - Program crash
  PID:5100
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 812 -s 792
  2⤵
  - Program crash
  PID:4648
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 812 -s 928
  2⤵
  - Program crash
  PID:5064
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 812 -s 1000
  2⤵
  - Program crash
  PID:2992
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 812 -s 1088
  2⤵
  - Program crash
  PID:4184
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 812 -s 1244
  2⤵
  - Program crash
  PID:3064
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\ELWWQZaEGE\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2396
- - C:\Users\Admin\AppData\Local\Temp\ELWWQZaEGE\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\ELWWQZaEGE\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4756
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 812 -s 1380
  2⤵
  - Program crash
  PID:5060
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 812 -s 1824
  2⤵
  - Program crash
  PID:3660
- 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:4252
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4552
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 812 -s 500
  2⤵
  - Program crash
  PID:2992

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 812 -ip 812
1⤵
PID:4508

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 812 -ip 812
1⤵
PID:2304

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 812 -ip 812
1⤵
PID:3324

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 812 -ip 812
1⤵
PID:3728

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 812 -ip 812
1⤵
PID:4108

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 812 -ip 812
1⤵
PID:4840

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 812 -ip 812
1⤵
PID:1324

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 812 -ip 812
1⤵
PID:1836

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 812 -ip 812
1⤵
PID:3432

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 812 -ip 812
1⤵
PID:4376

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 812 -ip 812
1⤵
PID:436

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 812 -ip 812
1⤵
PID:1012

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\ELWWQZaEGE\Bunifu_UI_v1.5.3.dll
Size 236KB
SHA256 f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf
MD5 2ecb51ab00c5f340380ecf849291dbcf
SHA1 1a4dffbce2a4ce65495ed79eab42a4da3b660931
SHA512 e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b
SSDEEP 6144:SIQpxILDXGGMO7Ice9C5kQw2hWHcHTykhb:SIQpxILDXGGlET9n/cHG
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\ELWWQZaEGE\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\ELWWQZaEGE\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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memory/812-143-0x0000000000400000-0x000000000046D000-memory.dmp

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memory/812-132-0x00000000005FE000-0x0000000000625000-memory.dmp

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memory/812-134-0x0000000000400000-0x000000000046D000-memory.dmp

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memory/812-153-0x0000000000400000-0x000000000046D000-memory.dmp

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memory/812-140-0x00000000005FE000-0x0000000000625000-memory.dmp

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memory/812-146-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/812-152-0x00000000005FE000-0x0000000000625000-memory.dmp

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memory/812-133-0x00000000008E0000-0x000000000091F000-memory.dmp

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memory/4756-145-0x00007FF860470000-0x00007FF860F31000-memory.dmp

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memory/4756-144-0x00007FF860470000-0x00007FF860F31000-memory.dmp

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memory/4756-142-0x000001B471E80000-0x000001B471EC2000-memory.dmp

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memory/4756-139-0x000001B456BD0000-0x000001B456D52000-memory.dmp

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