nymaim | 7d3f41f9b7e53145a7c3435b8a08b12eef122ad05932e2216d934060d283c7d8

Analysis

max time kernel
160s
max time network
190s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
22/11/2022, 15:02

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General

Target
file.exe
Size 1.2MB
Sample221122-sefa7sgb59
SHA256 7d3f41f9b7e53145a7c3435b8a08b12eef122ad05932e2216d934060d283c7d8
MD5 65e15416dcfe386a5473d5eb2be1dafe
SHA1 530a6aec1fadeaacd3e8c0ca64897e70c5525826
SHA512 427b95dad34fc04f69793d80a1206665d9425d9136d33880cec10b1d3dd62ae321d2b8802cd91b14e7953ce6454516fba46e253c394689aae22b534fdbbb61eb
SSDEEP 24576:RizGfVB9YBPMlAsRiqIDs1GBDZ6uFw9zerCCQjz37z4ooueGSn4qgZIY7eCLxYiO:6GtBiaSsEwQBdhwteTQfmjGS6NeViO
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
4856	is-0VBV3.tmp
1284	PrintFolders.exe
4456	u5RFuglgQ5.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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4856	is-0VBV3.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\unins000.dat	is-0VBV3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-1G5VR.tmp	is-0VBV3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-5R3LV.tmp	is-0VBV3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-VQ8I4.tmp	is-0VBV3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4QC0M.tmp	is-0VBV3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-U9B7R.tmp	is-0VBV3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GHOHB.tmp	is-0VBV3.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-0VBV3.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-0VBV3.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
4736	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1284	PrintFolders.exe
1284	PrintFolders.exe
1284	PrintFolders.exe
1284	PrintFolders.exe
1284	PrintFolders.exe
1284	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1284	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4736	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3520 wrote to memory of 4856	3520	file.exe	84
PID 3520 wrote to memory of 4856	3520	file.exe	84
PID 3520 wrote to memory of 4856	3520	file.exe	84
PID 4856 wrote to memory of 1284	4856	is-0VBV3.tmp	85
PID 4856 wrote to memory of 1284	4856	is-0VBV3.tmp	85
PID 4856 wrote to memory of 1284	4856	is-0VBV3.tmp	85
PID 1284 wrote to memory of 4456	1284	PrintFolders.exe	86
PID 1284 wrote to memory of 4456	1284	PrintFolders.exe	86
PID 1284 wrote to memory of 4456	1284	PrintFolders.exe	86
PID 1284 wrote to memory of 624	1284	PrintFolders.exe	96
PID 1284 wrote to memory of 624	1284	PrintFolders.exe	96
PID 1284 wrote to memory of 624	1284	PrintFolders.exe	96
PID 624 wrote to memory of 4736	624	cmd.exe	98
PID 624 wrote to memory of 4736	624	cmd.exe	98
PID 624 wrote to memory of 4736	624	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3520
- C:\Users\Admin\AppData\Local\Temp\is-OPD1F.tmp\is-0VBV3.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-OPD1F.tmp\is-0VBV3.tmp" /SL4 $801B2 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1037859 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4856
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:1284
  - - C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\u5RFuglgQ5.exe
      4⤵
      Executes dropped EXE
      PID:4456
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:624
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4736

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

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.4MB
SHA256 05741a870349650eaa1bfbafc0cfaf7117f9aa3c700b539cf770ad156d24e100
MD5 27496c39352685df56f07305396d34b9
SHA1 1a05392877de14b300a240ec6c6658e65bd43fc6
SHA512 fc4ad80ce6e6b95f4ba6e9c9f762bce1429b1a0cf39fb27a34d90eecef8e750468b7ee3fe51219733517506078774fff53a07748168a4431b69a1ba3e4ee19d8
SSDEEP 24576:c+C+SU3+pU+nUM+D+G+dA+N12Otikn60S0qfQcz2RhmMMS28+f4toGMC:FLXuv8a/dJD2b0G92RhmMt4uL
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.4MB
SHA256 05741a870349650eaa1bfbafc0cfaf7117f9aa3c700b539cf770ad156d24e100
MD5 27496c39352685df56f07305396d34b9
SHA1 1a05392877de14b300a240ec6c6658e65bd43fc6
SHA512 fc4ad80ce6e6b95f4ba6e9c9f762bce1429b1a0cf39fb27a34d90eecef8e750468b7ee3fe51219733517506078774fff53a07748168a4431b69a1ba3e4ee19d8
SSDEEP 24576:c+C+SU3+pU+nUM+D+G+dA+N12Otikn60S0qfQcz2RhmMMS28+f4toGMC:FLXuv8a/dJD2b0G92RhmMt4uL
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-0HHRG.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-0VBV3.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-OPD1F.tmp\is-0VBV3.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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is-0VBV3.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-OPD1F.tmp\is-0VBV3.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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u5RFuglgQ5.exe

Path C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\u5RFuglgQ5.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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u5RFuglgQ5.exe

Path C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\u5RFuglgQ5.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/1284-143-0x0000000000400000-0x0000000001373000-memory.dmp

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memory/1284-142-0x0000000000400000-0x0000000001373000-memory.dmp

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memory/1284-144-0x0000000000400000-0x0000000001373000-memory.dmp

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memory/1284-145-0x0000000000400000-0x0000000001373000-memory.dmp

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memory/1284-149-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1284-155-0x0000000000400000-0x0000000001373000-memory.dmp

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memory/3520-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/3520-138-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/3520-156-0x0000000000400000-0x0000000000413000-memory.dmp

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