nymaim | cda625c1df3bd73baee9f242334d41379b288b1703bb58ab5263fd64a218e649

Analysis

max time kernel
92s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
08/12/2022, 07:47

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General

Target
file.exe
Size 2.2MB
Sample221208-jmh8dscc7t
SHA256 cda625c1df3bd73baee9f242334d41379b288b1703bb58ab5263fd64a218e649
MD5 8a4878fc62f6bebc9000d446022f8d62
SHA1 b4191e75fbc4de8c21b185f8f13465c038273a0e
SHA512 977260facf4e000578ac4a36b574a05195d1bc988404608893919560d9b3c03260631005f20772bb56ffd38d758c80649354fa7d8f81b18237181aa31a632086
SSDEEP 49152:at+fMSk7+YSNMzRaEFbpcLjHc46XCezVAk63bdxGHZwN41k7:a+a4NMzRB3cLw9BAk+DGHQ
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
4392	is-7R44C.tmp
3440	IntFolders.exe
408	Cvpr0gwZ9o.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	IntFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4392	is-7R44C.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 created	C:\Program Files (x86)\PrintFolders\is-P3FOS.tmp	is-7R44C.tmp
File created	C:\Program Files (x86)\PrintFolders\is-TPUKJ.tmp	is-7R44C.tmp
File created	C:\Program Files (x86)\PrintFolders\is-DGALT.tmp	is-7R44C.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-7R44C.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\IntFolders.exe	is-7R44C.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-7R44C.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4BHRB.tmp	is-7R44C.tmp
File created	C:\Program Files (x86)\PrintFolders\is-PQBLP.tmp	is-7R44C.tmp
File created	C:\Program Files (x86)\PrintFolders\is-F9H0M.tmp	is-7R44C.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
3652	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3440	IntFolders.exe
3440	IntFolders.exe
3440	IntFolders.exe
3440	IntFolders.exe
3440	IntFolders.exe
3440	IntFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3652	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 532 wrote to memory of 4392	532	file.exe	78
PID 532 wrote to memory of 4392	532	file.exe	78
PID 532 wrote to memory of 4392	532	file.exe	78
PID 4392 wrote to memory of 3440	4392	is-7R44C.tmp	79
PID 4392 wrote to memory of 3440	4392	is-7R44C.tmp	79
PID 4392 wrote to memory of 3440	4392	is-7R44C.tmp	79
PID 3440 wrote to memory of 408	3440	IntFolders.exe	80
PID 3440 wrote to memory of 408	3440	IntFolders.exe	80
PID 3440 wrote to memory of 408	3440	IntFolders.exe	80
PID 3440 wrote to memory of 4240	3440	IntFolders.exe	89
PID 3440 wrote to memory of 4240	3440	IntFolders.exe	89
PID 3440 wrote to memory of 4240	3440	IntFolders.exe	89
PID 4240 wrote to memory of 3652	4240	cmd.exe	91
PID 4240 wrote to memory of 3652	4240	cmd.exe	91
PID 4240 wrote to memory of 3652	4240	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:532
- C:\Users\Admin\AppData\Local\Temp\is-UVHSR.tmp\is-7R44C.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-UVHSR.tmp\is-7R44C.tmp" /SL4 $E0048 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2066101 73728
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4392
- - C:\Program Files (x86)\PrintFolders\IntFolders.exe
    "C:\Program Files (x86)\PrintFolders\IntFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:3440
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\Cvpr0gwZ9o.exe
      4⤵
      Executes dropped EXE
      PID:408
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "IntFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\IntFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4240
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "IntFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3652

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

IntFolders.exe

Path C:\Program Files (x86)\PrintFolders\IntFolders.exe
Size 3.3MB
SHA256 f8cb032e17df29c8ae5de030e5452caa23c8e27baaf53163a2dd7b47aa604eb8
MD5 046fd814ccf23e9dbae02c7475aa2b8b
SHA1 fb1ec17fa5cf925a9580d9da79eb3c6079de0f00
SHA512 2fb8a7301ae7bc05ab2898ab96ed3b6dfd50a3268cca769f48490b2b3b5a9f1444f9c1e5e7d93e21f21026edec1a054928221d2e5a67add5ac8fbcd85219d513
SSDEEP 98304:76Xb6rhGUYnQ0HKrjZkACkyJ24/UCbCXKvjB7sn:HHubRe
MD5 SHA1 SHA512 SSDEEP

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IntFolders.exe

Path C:\Program Files (x86)\PrintFolders\IntFolders.exe
Size 3.3MB
SHA256 f8cb032e17df29c8ae5de030e5452caa23c8e27baaf53163a2dd7b47aa604eb8
MD5 046fd814ccf23e9dbae02c7475aa2b8b
SHA1 fb1ec17fa5cf925a9580d9da79eb3c6079de0f00
SHA512 2fb8a7301ae7bc05ab2898ab96ed3b6dfd50a3268cca769f48490b2b3b5a9f1444f9c1e5e7d93e21f21026edec1a054928221d2e5a67add5ac8fbcd85219d513
SSDEEP 98304:76Xb6rhGUYnQ0HKrjZkACkyJ24/UCbCXKvjB7sn:HHubRe
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

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

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is-7R44C.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-UVHSR.tmp\is-7R44C.tmp
Size 665KB
SHA256 2a841ad3820292ff2ab96429635062d0984d0b221e8bd7650777a1c51043b722
MD5 21efb90aabcda42c1232f008bd66fd99
SHA1 563835721536bbd8310eb1dc2fa18966ddffff3d
SHA512 106432d5d58bd2f904cbb9f28771c7b95ccbdd7cdf506b190f5968dbf552ae4ed54cd2f46624ab47cc730c565b7d8d7de7cc51609540df05d0a46c932c20c36e
SSDEEP 12288:/h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvX4xO6:p5NoqWolrP837JzHvA6yknyWFxvoxO6
MD5 SHA1 SHA512 SSDEEP

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is-7R44C.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-UVHSR.tmp\is-7R44C.tmp
Size 665KB
SHA256 2a841ad3820292ff2ab96429635062d0984d0b221e8bd7650777a1c51043b722
MD5 21efb90aabcda42c1232f008bd66fd99
SHA1 563835721536bbd8310eb1dc2fa18966ddffff3d
SHA512 106432d5d58bd2f904cbb9f28771c7b95ccbdd7cdf506b190f5968dbf552ae4ed54cd2f46624ab47cc730c565b7d8d7de7cc51609540df05d0a46c932c20c36e
SSDEEP 12288:/h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvX4xO6:p5NoqWolrP837JzHvA6yknyWFxvoxO6
MD5 SHA1 SHA512 SSDEEP

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Cvpr0gwZ9o.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\Cvpr0gwZ9o.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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Cvpr0gwZ9o.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\Cvpr0gwZ9o.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/532-151-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/532-134-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/532-132-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/532-156-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/3440-142-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/3440-143-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/3440-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3440-152-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/3440-155-0x0000000000400000-0x000000000154A000-memory.dmp

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