nymaim | 0cf0ecae153842e1f4b497e76547828e120d9d9e25d66ba4b59259ca9fb7abe4

Analysis

max time kernel
91s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
06/10/2022, 22:43

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General

Target
file.exe
Size 276KB
Sample221006-2m8gdsbab4
SHA256 0cf0ecae153842e1f4b497e76547828e120d9d9e25d66ba4b59259ca9fb7abe4
MD5 cd60d75a88a3e9690ee183143a1d5572
SHA1 b8ee3725eed6cb92afddd0b22e12501943cee38b
SHA512 54cc23affb1ff37628beb96860b0e0207e09748574cad39ca85219e2a70fc1a8115bf70fa6eeac5fa80a96a10c26faaaec0238716ab6aa8a61491b161fb61d26
SSDEEP 6144:sOGLNDLEVN5G5dx+gxK2V0cKo5vErYTo2iq+9J:sOGJ2N5EQUKo8rYToDq+j
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
220	afjcT.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-1-5-21-2295526160-1155304984-640977766-1000\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
748	692	WerFault.exe	80
1136	692	WerFault.exe	80
2076	692	WerFault.exe	80
1408	692	WerFault.exe	80
3432	692	WerFault.exe	80
4000	692	WerFault.exe	80
2540	692	WerFault.exe	80
4352	692	WerFault.exe	80
2588	692	WerFault.exe	80

Kills process with taskkill 1 IoCs

evasion

pid	Process
2572	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
692	file.exe
692	file.exe
692	file.exe
692	file.exe
692	file.exe
692	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2572	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 692 wrote to memory of 220	692	file.exe	100
PID 692 wrote to memory of 220	692	file.exe	100
PID 692 wrote to memory of 220	692	file.exe	100
PID 692 wrote to memory of 1804	692	file.exe	106
PID 692 wrote to memory of 1804	692	file.exe	106
PID 692 wrote to memory of 1804	692	file.exe	106
PID 1804 wrote to memory of 2572	1804	cmd.exe	109
PID 1804 wrote to memory of 2572	1804	cmd.exe	109
PID 1804 wrote to memory of 2572	1804	cmd.exe	109

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:692
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 692 -s 452
  2⤵
  - Program crash
  PID:748
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 692 -s 452
  2⤵
  - Program crash
  PID:1136
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 692 -s 804
  2⤵
  - Program crash
  PID:2076
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 692 -s 824
  2⤵
  - Program crash
  PID:1408
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 692 -s 876
  2⤵
  - Program crash
  PID:3432
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 692 -s 864
  2⤵
  - Program crash
  PID:4000
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 692 -s 868
  2⤵
  - Program crash
  PID:2540
- C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\afjcT.exe
  2⤵
  - Executes dropped EXE
  PID:220
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 692 -s 1440
  2⤵
  - Program crash
  PID:4352
- 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:1804
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2572
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 692 -s 1408
  2⤵
  - Program crash
  PID:2588

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 692 -ip 692
1⤵
PID:64

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 692 -ip 692
1⤵
PID:1680

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 692 -ip 692
1⤵
PID:2716

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 692 -ip 692
1⤵
PID:1708

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 692 -ip 692
1⤵
PID:1100

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 692 -ip 692
1⤵
PID:1372

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 692 -ip 692
1⤵
PID:4620

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 692 -ip 692
1⤵
PID:1664

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 692 -ip 692
1⤵
PID:2484

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

afjcT.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\afjcT.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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afjcT.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\afjcT.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/692-139-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/692-135-0x0000000000400000-0x00000000005A1000-memory.dmp

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memory/692-134-0x00000000022E0000-0x0000000002333000-memory.dmp

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memory/692-133-0x000000000083D000-0x000000000086E000-memory.dmp

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memory/692-143-0x000000000083D000-0x000000000086E000-memory.dmp

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memory/692-144-0x0000000000400000-0x00000000005A1000-memory.dmp

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memory/692-147-0x000000000083D000-0x000000000086E000-memory.dmp

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memory/692-148-0x0000000000400000-0x00000000005A1000-memory.dmp

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