nymaim | 3c67de0889bb2aeff98053b52fa80ab91871b2602fcc3dc3832023a2e29a4821

Analysis

max time kernel
89s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
18/12/2022, 00:01

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General

Target
file.exe
Size 2.3MB
Sample221218-aawtaaab35
SHA256 3c67de0889bb2aeff98053b52fa80ab91871b2602fcc3dc3832023a2e29a4821
MD5 126039517fe48b5ee0f1d6fb883596df
SHA1 72a2200bdc06a3523ee4dbd5b3e33ecc5a2ee49d
SHA512 a89d171081f39e2bd1aa62d429247840dca92e2eb5996f1f4c7be90c59673fd9a4bf769e15391008851aa9bbf8f611a66991cb79b9aa7dbeb632813dec8f9e0f
SSDEEP 49152:dff4qPZAvjEl6ri0cjxA2aUut1O5Zgfc6u5yAL:dIqPZujM+YANvOvgfOf
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
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 3 IoCs

pid	Process
4908	is-NIDSP.tmp
2328	obFolders.exe
2980	37UyDh.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	obFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4908	is-NIDSP.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\PrintFolders\obFolders.exe	is-NIDSP.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-NIDSP.tmp
File created	C:\Program Files (x86)\PrintFolders\is-C1EQ7.tmp	is-NIDSP.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RA0VN.tmp	is-NIDSP.tmp
File created	C:\Program Files (x86)\PrintFolders\is-BBGH1.tmp	is-NIDSP.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-NIDSP.tmp
File created	C:\Program Files (x86)\PrintFolders\is-I8N1R.tmp	is-NIDSP.tmp
File created	C:\Program Files (x86)\PrintFolders\is-6A6MB.tmp	is-NIDSP.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4KJMI.tmp	is-NIDSP.tmp

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
4476	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2328	obFolders.exe
2328	obFolders.exe
2328	obFolders.exe
2328	obFolders.exe
2328	obFolders.exe
2328	obFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4476	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 5048 wrote to memory of 4908	5048	file.exe	84
PID 5048 wrote to memory of 4908	5048	file.exe	84
PID 5048 wrote to memory of 4908	5048	file.exe	84
PID 4908 wrote to memory of 2328	4908	is-NIDSP.tmp	85
PID 4908 wrote to memory of 2328	4908	is-NIDSP.tmp	85
PID 4908 wrote to memory of 2328	4908	is-NIDSP.tmp	85
PID 2328 wrote to memory of 2980	2328	obFolders.exe	86
PID 2328 wrote to memory of 2980	2328	obFolders.exe	86
PID 2328 wrote to memory of 2980	2328	obFolders.exe	86
PID 2328 wrote to memory of 4976	2328	obFolders.exe	94
PID 2328 wrote to memory of 4976	2328	obFolders.exe	94
PID 2328 wrote to memory of 4976	2328	obFolders.exe	94
PID 4976 wrote to memory of 4476	4976	cmd.exe	96
PID 4976 wrote to memory of 4476	4976	cmd.exe	96
PID 4976 wrote to memory of 4476	4976	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5048
- C:\Users\Admin\AppData\Local\Temp\is-HQ68V.tmp\is-NIDSP.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-HQ68V.tmp\is-NIDSP.tmp" /SL4 $8006A "C:\Users\Admin\AppData\Local\Temp\file.exe" 2127069 169472
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4908
- - C:\Program Files (x86)\PrintFolders\obFolders.exe
    "C:\Program Files (x86)\PrintFolders\obFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2328
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\37UyDh.exe
      4⤵
      Executes dropped EXE
      PID:2980
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "obFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\obFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4976
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "obFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4476

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

Replay Monitor

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Downloads

obFolders.exe

Path C:\Program Files (x86)\PrintFolders\obFolders.exe
Size 3.5MB
SHA256 3946d3fe93dbfe2145b4e0e6683fe18a191a79ca5efff9046f1212d6ca0ec39b
MD5 5471b70bdf880cba9f405baf1a0a4e6c
SHA1 6217f2a9271d671b0eb1618e5f39ae00385a5466
SHA512 ee8151c02221d8893d7935293ca392f3bc8abd6edb9c990d23145b9e24fa17ec6c6eeb9f8f5faddb739741e55447bc6c34f839b388a866818583da90d7dda097
SSDEEP 98304:loAJEZo+Ff/RffoT0k5hpojiXCEZep1BSV8I9sKpBHkQs:zglffWcEs
MD5 SHA1 SHA512 SSDEEP

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obFolders.exe

Path C:\Program Files (x86)\PrintFolders\obFolders.exe
Size 3.5MB
SHA256 3946d3fe93dbfe2145b4e0e6683fe18a191a79ca5efff9046f1212d6ca0ec39b
MD5 5471b70bdf880cba9f405baf1a0a4e6c
SHA1 6217f2a9271d671b0eb1618e5f39ae00385a5466
SHA512 ee8151c02221d8893d7935293ca392f3bc8abd6edb9c990d23145b9e24fa17ec6c6eeb9f8f5faddb739741e55447bc6c34f839b388a866818583da90d7dda097
SSDEEP 98304:loAJEZo+Ff/RffoT0k5hpojiXCEZep1BSV8I9sKpBHkQs:zglffWcEs
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-7SN6J.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-NIDSP.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-HQ68V.tmp\is-NIDSP.tmp
Size 759KB
SHA256 11ec35b1fea3160e892f0875034a2f18cf0d8d8874ac611b5a7e0f0ace2667ec
MD5 0dc8826072fc99382be7db6ae5929aff
SHA1 7ca23e146bf9bde712b27e400de3243e6bd0a357
SHA512 08db35c065b9b8f740242587f35a3c0ba772993d8132589fe26bafa9bab31d6c5aecae62490a22e135d64ce6b54c26e553534e5d9d6e01d6be8472f471bdf442
SSDEEP 12288:dh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvsZ6ZkkxOZ:D5NoqWolrP837JzHvA6yknyWFxvlZkkE
MD5 SHA1 SHA512 SSDEEP

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is-NIDSP.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-HQ68V.tmp\is-NIDSP.tmp
Size 759KB
SHA256 11ec35b1fea3160e892f0875034a2f18cf0d8d8874ac611b5a7e0f0ace2667ec
MD5 0dc8826072fc99382be7db6ae5929aff
SHA1 7ca23e146bf9bde712b27e400de3243e6bd0a357
SHA512 08db35c065b9b8f740242587f35a3c0ba772993d8132589fe26bafa9bab31d6c5aecae62490a22e135d64ce6b54c26e553534e5d9d6e01d6be8472f471bdf442
SSDEEP 12288:dh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvsZ6ZkkxOZ:D5NoqWolrP837JzHvA6yknyWFxvlZkkE
MD5 SHA1 SHA512 SSDEEP

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37UyDh.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\37UyDh.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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37UyDh.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\37UyDh.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/2328-143-0x0000000000400000-0x000000000158A000-memory.dmp

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memory/2328-142-0x0000000000400000-0x000000000158A000-memory.dmp

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memory/2328-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2328-151-0x0000000000400000-0x000000000158A000-memory.dmp

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memory/2328-154-0x0000000000400000-0x000000000158A000-memory.dmp

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memory/5048-132-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/5048-137-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/5048-155-0x0000000000400000-0x0000000000430000-memory.dmp

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