nymaim | 8ec72faef5f0fcd1c8b3c5371eb3f9bd8beeefa034f7fc4750168df49e35a69f

General

Target

file.exe
Size

406KB
MD5

55c0f803a6f225c8d99cf5649bcde8a2
SHA1

e4235a1a602a4e1bc2ff3b8fe6d1eece837c6d46
SHA256

8ec72faef5f0fcd1c8b3c5371eb3f9bd8beeefa034f7fc4750168df49e35a69f
SHA512

0f51225afbcdf0322442dadcd916e68ad0a1673ae1b64df0354c1e3c938aacb54b2e4c69ed8e01ca57d27b7466f1d1bfa90bebe58fdb629250addc63c749768a
SSDEEP

6144:pn0aK52xZ86pYYyaihvjhbetJNk8Dy2i16kK0gLQmPC6nCrwVfquS:pnw52k6pYGiLetJS2iIkTNYVnCd

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

C2

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
3804	56MHJTM.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 9 IoCs

pid	pid_target	Process	procid_target
4840	4032	WerFault.exe	84
2240	4032	WerFault.exe	84
3596	4032	WerFault.exe	84
852	4032	WerFault.exe	84
220	4032	WerFault.exe	84
5116	4032	WerFault.exe	84
2660	4032	WerFault.exe	84
4344	4032	WerFault.exe	84
4780	4032	WerFault.exe	84

Kills process with taskkill 1 IoCs

evasion

pid	Process
752	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4032	file.exe
4032	file.exe
4032	file.exe
4032	file.exe
4032	file.exe
4032	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	752	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4032 wrote to memory of 3804	4032	file.exe	99
PID 4032 wrote to memory of 3804	4032	file.exe	99
PID 4032 wrote to memory of 3804	4032	file.exe	99
PID 4032 wrote to memory of 3108	4032	file.exe	109
PID 4032 wrote to memory of 3108	4032	file.exe	109
PID 4032 wrote to memory of 3108	4032	file.exe	109
PID 3108 wrote to memory of 752	3108	cmd.exe	113
PID 3108 wrote to memory of 752	3108	cmd.exe	113
PID 3108 wrote to memory of 752	3108	cmd.exe	113

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:4032
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4032 -s 452
  2⤵
  - Program crash
  PID:4840
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4032 -s 764
  2⤵
  - Program crash
  PID:2240
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4032 -s 804
  2⤵
  - Program crash
  PID:3596
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4032 -s 804
  2⤵
  - Program crash
  PID:852
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4032 -s 840
  2⤵
  - Program crash
  PID:220
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4032 -s 780
  2⤵
  - Program crash
  PID:5116
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4032 -s 764
  2⤵
  - Program crash
  PID:2660
- C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\56MHJTM.exe
  2⤵
  - Executes dropped EXE
  PID:3804
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4032 -s 1440
  2⤵
  - Program crash
  PID:4344
- 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:3108
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:752
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4032 -s 1396
  2⤵
  - Program crash
  PID:4780

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4032 -ip 4032
1⤵
PID:2740

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 4032 -ip 4032
1⤵
PID:4712

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4032 -ip 4032
1⤵
PID:2112

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4032 -ip 4032
1⤵
PID:3392

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4032 -ip 4032
1⤵
PID:176

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 4032 -ip 4032
1⤵
PID:4104

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4032 -ip 4032
1⤵
PID:4292

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 4032 -ip 4032
1⤵
PID:4860

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 572 -p 4032 -ip 4032
1⤵
PID:4772

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\56MHJTM.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\56MHJTM.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/4032-132-0x00000000005E7000-0x0000000000617000-memory.dmp

Filesize
192KB

Download
memory/4032-133-0x00000000008D0000-0x0000000000923000-memory.dmp

Filesize
332KB

Download
memory/4032-134-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/4032-138-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4032-142-0x00000000005E7000-0x0000000000617000-memory.dmp

Filesize
192KB

Download
memory/4032-143-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/4032-146-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download

Analysis

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